Struct ffmpeg_next::format::context::output::Output

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pub struct Output { /* private fields */ }

Implementations§

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impl Output

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pub unsafe fn wrap(ptr: *mut AVFormatContext) -> Self

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pub unsafe fn as_ptr(&self) -> *const AVFormatContext

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pub unsafe fn as_mut_ptr(&mut self) -> *mut AVFormatContext

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impl Output

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pub fn format(&self) -> Output

Examples found in repository?
examples/transcode-x264.rs (line 49)
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    fn new(
        ist: &format::stream::Stream,
        octx: &mut format::context::Output,
        ost_index: usize,
        x264_opts: Dictionary,
        enable_logging: bool,
    ) -> Result<Self, ffmpeg::Error> {
        let global_header = octx.format().flags().contains(format::Flags::GLOBAL_HEADER);
        let decoder = ffmpeg::codec::context::Context::from_parameters(ist.parameters())?
            .decoder()
            .video()?;
        let mut ost = octx.add_stream(encoder::find(codec::Id::H264))?;
        let mut encoder = codec::context::Context::from_parameters(ost.parameters())?
            .encoder()
            .video()?;
        encoder.set_height(decoder.height());
        encoder.set_width(decoder.width());
        encoder.set_aspect_ratio(decoder.aspect_ratio());
        encoder.set_format(decoder.format());
        encoder.set_frame_rate(decoder.frame_rate());
        encoder.set_time_base(decoder.frame_rate().unwrap().invert());
        if global_header {
            encoder.set_flags(codec::Flags::GLOBAL_HEADER);
        }

        encoder
            .open_with(x264_opts)
            .expect("error opening libx264 encoder with supplied settings");
        encoder = codec::context::Context::from_parameters(ost.parameters())?
            .encoder()
            .video()?;
        ost.set_parameters(&encoder);
        Ok(Self {
            ost_index,
            decoder,
            encoder: codec::context::Context::from_parameters(ost.parameters())?
                .encoder()
                .video()?,
            logging_enabled: enable_logging,
            frame_count: 0,
            last_log_frame_count: 0,
            starting_time: Instant::now(),
            last_log_time: Instant::now(),
        })
    }
More examples
Hide additional examples
examples/transcode-audio.rs (line 77)
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fn transcoder<P: AsRef<Path>>(
    ictx: &mut format::context::Input,
    octx: &mut format::context::Output,
    path: &P,
    filter_spec: &str,
) -> Result<Transcoder, ffmpeg::Error> {
    let input = ictx
        .streams()
        .best(media::Type::Audio)
        .expect("could not find best audio stream");
    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
    let mut decoder = context.decoder().audio()?;
    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
        .expect("failed to find encoder")
        .audio()?;
    let global = octx
        .format()
        .flags()
        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);

    decoder.set_parameters(input.parameters())?;

    let mut output = octx.add_stream(codec)?;
    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
    let mut encoder = context.encoder().audio()?;

    let channel_layout = codec
        .channel_layouts()
        .map(|cls| cls.best(decoder.channel_layout().channels()))
        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);

    if global {
        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
    }

    encoder.set_rate(decoder.rate() as i32);
    encoder.set_channel_layout(channel_layout);
    encoder.set_channels(channel_layout.channels());
    encoder.set_format(
        codec
            .formats()
            .expect("unknown supported formats")
            .next()
            .unwrap(),
    );
    encoder.set_bit_rate(decoder.bit_rate());
    encoder.set_max_bit_rate(decoder.max_bit_rate());

    encoder.set_time_base((1, decoder.rate() as i32));
    output.set_time_base((1, decoder.rate() as i32));

    let encoder = encoder.open_as(codec)?;
    output.set_parameters(&encoder);

    let filter = filter(filter_spec, &decoder, &encoder)?;

    let in_time_base = decoder.time_base();
    let out_time_base = output.time_base();

    Ok(Transcoder {
        stream: input.index(),
        filter,
        decoder,
        encoder,
        in_time_base,
        out_time_base,
    })
}
source

pub fn write_header(&mut self) -> Result<(), Error>

Examples found in repository?
examples/transcode-audio.rs (line 226)
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fn main() {
    ffmpeg::init().unwrap();

    let input = env::args().nth(1).expect("missing input");
    let output = env::args().nth(2).expect("missing output");
    let filter = env::args().nth(3).unwrap_or_else(|| "anull".to_owned());
    let seek = env::args().nth(4).and_then(|s| s.parse::<i64>().ok());

    let mut ictx = format::input(&input).unwrap();
    let mut octx = format::output(&output).unwrap();
    let mut transcoder = transcoder(&mut ictx, &mut octx, &output, &filter).unwrap();

    if let Some(position) = seek {
        // If the position was given in seconds, rescale it to ffmpegs base timebase.
        let position = position.rescale((1, 1), rescale::TIME_BASE);
        // If this seek was embedded in the transcoding loop, a call of `flush()`
        // for every opened buffer after the successful seek would be advisable.
        ictx.seek(position, ..position).unwrap();
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        if stream.index() == transcoder.stream {
            packet.rescale_ts(stream.time_base(), transcoder.in_time_base);
            transcoder.send_packet_to_decoder(&packet);
            transcoder.receive_and_process_decoded_frames(&mut octx);
        }
    }

    transcoder.send_eof_to_decoder();
    transcoder.receive_and_process_decoded_frames(&mut octx);

    transcoder.flush_filter();
    transcoder.get_and_process_filtered_frames(&mut octx);

    transcoder.send_eof_to_encoder();
    transcoder.receive_and_process_encoded_packets(&mut octx);

    octx.write_trailer().unwrap();
}
More examples
Hide additional examples
examples/remux.rs (line 43)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Warning);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    let mut stream_mapping = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 1); ictx.nb_streams() as _];
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        ost_index += 1;
        let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
        ost.set_parameters(ist.parameters());
        // We need to set codec_tag to 0 lest we run into incompatible codec tag
        // issues when muxing into a different container format. Unfortunately
        // there's no high level API to do this (yet).
        unsafe {
            (*ost.parameters().as_mut_ptr()).codec_tag = 0;
        }
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost = octx.stream(ost_index as _).unwrap();
        packet.rescale_ts(ist_time_bases[ist_index], ost.time_base());
        packet.set_position(-1);
        packet.set_stream(ost_index as _);
        packet.write_interleaved(&mut octx).unwrap();
    }

    octx.write_trailer().unwrap();
}
examples/transcode-x264.rs (line 235)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");
    let x264_opts = parse_opts(
        env::args()
            .nth(3)
            .unwrap_or_else(|| DEFAULT_X264_OPTS.to_string()),
    )
    .expect("invalid x264 options string");

    eprintln!("x264 options: {:?}", x264_opts);

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Info);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    format::context::input::dump(&ictx, 0, Some(&input_file));

    let best_video_stream_index = ictx
        .streams()
        .best(media::Type::Video)
        .map(|stream| stream.index());
    let mut stream_mapping: Vec<isize> = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut ost_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut transcoders = HashMap::new();
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        if ist_medium == media::Type::Video {
            // Initialize transcoder for video stream.
            transcoders.insert(
                ist_index,
                Transcoder::new(
                    &ist,
                    &mut octx,
                    ost_index as _,
                    x264_opts.to_owned(),
                    Some(ist_index) == best_video_stream_index,
                )
                .unwrap(),
            );
        } else {
            // Set up for stream copy for non-video stream.
            let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
            ost.set_parameters(ist.parameters());
            // We need to set codec_tag to 0 lest we run into incompatible codec tag
            // issues when muxing into a different container format. Unfortunately
            // there's no high level API to do this (yet).
            unsafe {
                (*ost.parameters().as_mut_ptr()).codec_tag = 0;
            }
        }
        ost_index += 1;
    }

    octx.set_metadata(ictx.metadata().to_owned());
    format::context::output::dump(&octx, 0, Some(&output_file));
    octx.write_header().unwrap();

    for (ost_index, _) in octx.streams().enumerate() {
        ost_time_bases[ost_index] = octx.stream(ost_index as _).unwrap().time_base();
    }

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost_time_base = ost_time_bases[ost_index as usize];
        match transcoders.get_mut(&ist_index) {
            Some(transcoder) => {
                packet.rescale_ts(stream.time_base(), transcoder.decoder.time_base());
                transcoder.send_packet_to_decoder(&packet);
                transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
            }
            None => {
                // Do stream copy on non-video streams.
                packet.rescale_ts(ist_time_bases[ist_index], ost_time_base);
                packet.set_position(-1);
                packet.set_stream(ost_index as _);
                packet.write_interleaved(&mut octx).unwrap();
            }
        }
    }

    // Flush encoders and decoders.
    for (ost_index, transcoder) in transcoders.iter_mut() {
        let ost_time_base = ost_time_bases[*ost_index];
        transcoder.send_eof_to_decoder();
        transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
        transcoder.send_eof_to_encoder();
        transcoder.receive_and_process_encoded_packets(&mut octx, ost_time_base);
    }

    octx.write_trailer().unwrap();
}
source

pub fn write_header_with( &mut self, options: Dictionary<'_> ) -> Result<Dictionary<'_>, Error>

source

pub fn write_trailer(&mut self) -> Result<(), Error>

Examples found in repository?
examples/transcode-audio.rs (line 245)
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fn main() {
    ffmpeg::init().unwrap();

    let input = env::args().nth(1).expect("missing input");
    let output = env::args().nth(2).expect("missing output");
    let filter = env::args().nth(3).unwrap_or_else(|| "anull".to_owned());
    let seek = env::args().nth(4).and_then(|s| s.parse::<i64>().ok());

    let mut ictx = format::input(&input).unwrap();
    let mut octx = format::output(&output).unwrap();
    let mut transcoder = transcoder(&mut ictx, &mut octx, &output, &filter).unwrap();

    if let Some(position) = seek {
        // If the position was given in seconds, rescale it to ffmpegs base timebase.
        let position = position.rescale((1, 1), rescale::TIME_BASE);
        // If this seek was embedded in the transcoding loop, a call of `flush()`
        // for every opened buffer after the successful seek would be advisable.
        ictx.seek(position, ..position).unwrap();
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        if stream.index() == transcoder.stream {
            packet.rescale_ts(stream.time_base(), transcoder.in_time_base);
            transcoder.send_packet_to_decoder(&packet);
            transcoder.receive_and_process_decoded_frames(&mut octx);
        }
    }

    transcoder.send_eof_to_decoder();
    transcoder.receive_and_process_decoded_frames(&mut octx);

    transcoder.flush_filter();
    transcoder.get_and_process_filtered_frames(&mut octx);

    transcoder.send_eof_to_encoder();
    transcoder.receive_and_process_encoded_packets(&mut octx);

    octx.write_trailer().unwrap();
}
More examples
Hide additional examples
examples/remux.rs (line 58)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Warning);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    let mut stream_mapping = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 1); ictx.nb_streams() as _];
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        ost_index += 1;
        let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
        ost.set_parameters(ist.parameters());
        // We need to set codec_tag to 0 lest we run into incompatible codec tag
        // issues when muxing into a different container format. Unfortunately
        // there's no high level API to do this (yet).
        unsafe {
            (*ost.parameters().as_mut_ptr()).codec_tag = 0;
        }
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost = octx.stream(ost_index as _).unwrap();
        packet.rescale_ts(ist_time_bases[ist_index], ost.time_base());
        packet.set_position(-1);
        packet.set_stream(ost_index as _);
        packet.write_interleaved(&mut octx).unwrap();
    }

    octx.write_trailer().unwrap();
}
examples/transcode-x264.rs (line 273)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");
    let x264_opts = parse_opts(
        env::args()
            .nth(3)
            .unwrap_or_else(|| DEFAULT_X264_OPTS.to_string()),
    )
    .expect("invalid x264 options string");

    eprintln!("x264 options: {:?}", x264_opts);

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Info);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    format::context::input::dump(&ictx, 0, Some(&input_file));

    let best_video_stream_index = ictx
        .streams()
        .best(media::Type::Video)
        .map(|stream| stream.index());
    let mut stream_mapping: Vec<isize> = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut ost_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut transcoders = HashMap::new();
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        if ist_medium == media::Type::Video {
            // Initialize transcoder for video stream.
            transcoders.insert(
                ist_index,
                Transcoder::new(
                    &ist,
                    &mut octx,
                    ost_index as _,
                    x264_opts.to_owned(),
                    Some(ist_index) == best_video_stream_index,
                )
                .unwrap(),
            );
        } else {
            // Set up for stream copy for non-video stream.
            let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
            ost.set_parameters(ist.parameters());
            // We need to set codec_tag to 0 lest we run into incompatible codec tag
            // issues when muxing into a different container format. Unfortunately
            // there's no high level API to do this (yet).
            unsafe {
                (*ost.parameters().as_mut_ptr()).codec_tag = 0;
            }
        }
        ost_index += 1;
    }

    octx.set_metadata(ictx.metadata().to_owned());
    format::context::output::dump(&octx, 0, Some(&output_file));
    octx.write_header().unwrap();

    for (ost_index, _) in octx.streams().enumerate() {
        ost_time_bases[ost_index] = octx.stream(ost_index as _).unwrap().time_base();
    }

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost_time_base = ost_time_bases[ost_index as usize];
        match transcoders.get_mut(&ist_index) {
            Some(transcoder) => {
                packet.rescale_ts(stream.time_base(), transcoder.decoder.time_base());
                transcoder.send_packet_to_decoder(&packet);
                transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
            }
            None => {
                // Do stream copy on non-video streams.
                packet.rescale_ts(ist_time_bases[ist_index], ost_time_base);
                packet.set_position(-1);
                packet.set_stream(ost_index as _);
                packet.write_interleaved(&mut octx).unwrap();
            }
        }
    }

    // Flush encoders and decoders.
    for (ost_index, transcoder) in transcoders.iter_mut() {
        let ost_time_base = ost_time_bases[*ost_index];
        transcoder.send_eof_to_decoder();
        transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
        transcoder.send_eof_to_encoder();
        transcoder.receive_and_process_encoded_packets(&mut octx, ost_time_base);
    }

    octx.write_trailer().unwrap();
}
source

pub fn add_stream<E: Encoder>( &mut self, codec: E ) -> Result<StreamMut<'_>, Error>

Examples found in repository?
examples/transcode-x264.rs (line 53)
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    fn new(
        ist: &format::stream::Stream,
        octx: &mut format::context::Output,
        ost_index: usize,
        x264_opts: Dictionary,
        enable_logging: bool,
    ) -> Result<Self, ffmpeg::Error> {
        let global_header = octx.format().flags().contains(format::Flags::GLOBAL_HEADER);
        let decoder = ffmpeg::codec::context::Context::from_parameters(ist.parameters())?
            .decoder()
            .video()?;
        let mut ost = octx.add_stream(encoder::find(codec::Id::H264))?;
        let mut encoder = codec::context::Context::from_parameters(ost.parameters())?
            .encoder()
            .video()?;
        encoder.set_height(decoder.height());
        encoder.set_width(decoder.width());
        encoder.set_aspect_ratio(decoder.aspect_ratio());
        encoder.set_format(decoder.format());
        encoder.set_frame_rate(decoder.frame_rate());
        encoder.set_time_base(decoder.frame_rate().unwrap().invert());
        if global_header {
            encoder.set_flags(codec::Flags::GLOBAL_HEADER);
        }

        encoder
            .open_with(x264_opts)
            .expect("error opening libx264 encoder with supplied settings");
        encoder = codec::context::Context::from_parameters(ost.parameters())?
            .encoder()
            .video()?;
        ost.set_parameters(&encoder);
        Ok(Self {
            ost_index,
            decoder,
            encoder: codec::context::Context::from_parameters(ost.parameters())?
                .encoder()
                .video()?,
            logging_enabled: enable_logging,
            frame_count: 0,
            last_log_frame_count: 0,
            starting_time: Instant::now(),
            last_log_time: Instant::now(),
        })
    }

    fn send_packet_to_decoder(&mut self, packet: &Packet) {
        self.decoder.send_packet(packet).unwrap();
    }

    fn send_eof_to_decoder(&mut self) {
        self.decoder.send_eof().unwrap();
    }

    fn receive_and_process_decoded_frames(
        &mut self,
        octx: &mut format::context::Output,
        ost_time_base: Rational,
    ) {
        let mut frame = frame::Video::empty();
        while self.decoder.receive_frame(&mut frame).is_ok() {
            self.frame_count += 1;
            let timestamp = frame.timestamp();
            self.log_progress(f64::from(
                Rational(timestamp.unwrap_or(0) as i32, 1) * self.decoder.time_base(),
            ));
            frame.set_pts(timestamp);
            frame.set_kind(picture::Type::None);
            self.send_frame_to_encoder(&frame);
            self.receive_and_process_encoded_packets(octx, ost_time_base);
        }
    }

    fn send_frame_to_encoder(&mut self, frame: &frame::Video) {
        self.encoder.send_frame(frame).unwrap();
    }

    fn send_eof_to_encoder(&mut self) {
        self.encoder.send_eof().unwrap();
    }

    fn receive_and_process_encoded_packets(
        &mut self,
        octx: &mut format::context::Output,
        ost_time_base: Rational,
    ) {
        let mut encoded = Packet::empty();
        while self.encoder.receive_packet(&mut encoded).is_ok() {
            encoded.set_stream(self.ost_index);
            encoded.rescale_ts(self.decoder.time_base(), ost_time_base);
            encoded.write_interleaved(octx).unwrap();
        }
    }

    fn log_progress(&mut self, timestamp: f64) {
        if !self.logging_enabled
            || (self.frame_count - self.last_log_frame_count < 100
                && self.last_log_time.elapsed().as_secs_f64() < 1.0)
        {
            return;
        }
        eprintln!(
            "time elpased: \t{:8.2}\tframe count: {:8}\ttimestamp: {:8.2}",
            self.starting_time.elapsed().as_secs_f64(),
            self.frame_count,
            timestamp
        );
        self.last_log_frame_count = self.frame_count;
        self.last_log_time = Instant::now();
    }
}

fn parse_opts<'a>(s: String) -> Option<Dictionary<'a>> {
    let mut dict = Dictionary::new();
    for keyval in s.split_terminator(',') {
        let tokens: Vec<&str> = keyval.split('=').collect();
        match tokens[..] {
            [key, val] => dict.set(key, val),
            _ => return None,
        }
    }
    Some(dict)
}

fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");
    let x264_opts = parse_opts(
        env::args()
            .nth(3)
            .unwrap_or_else(|| DEFAULT_X264_OPTS.to_string()),
    )
    .expect("invalid x264 options string");

    eprintln!("x264 options: {:?}", x264_opts);

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Info);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    format::context::input::dump(&ictx, 0, Some(&input_file));

    let best_video_stream_index = ictx
        .streams()
        .best(media::Type::Video)
        .map(|stream| stream.index());
    let mut stream_mapping: Vec<isize> = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut ost_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut transcoders = HashMap::new();
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        if ist_medium == media::Type::Video {
            // Initialize transcoder for video stream.
            transcoders.insert(
                ist_index,
                Transcoder::new(
                    &ist,
                    &mut octx,
                    ost_index as _,
                    x264_opts.to_owned(),
                    Some(ist_index) == best_video_stream_index,
                )
                .unwrap(),
            );
        } else {
            // Set up for stream copy for non-video stream.
            let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
            ost.set_parameters(ist.parameters());
            // We need to set codec_tag to 0 lest we run into incompatible codec tag
            // issues when muxing into a different container format. Unfortunately
            // there's no high level API to do this (yet).
            unsafe {
                (*ost.parameters().as_mut_ptr()).codec_tag = 0;
            }
        }
        ost_index += 1;
    }

    octx.set_metadata(ictx.metadata().to_owned());
    format::context::output::dump(&octx, 0, Some(&output_file));
    octx.write_header().unwrap();

    for (ost_index, _) in octx.streams().enumerate() {
        ost_time_bases[ost_index] = octx.stream(ost_index as _).unwrap().time_base();
    }

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost_time_base = ost_time_bases[ost_index as usize];
        match transcoders.get_mut(&ist_index) {
            Some(transcoder) => {
                packet.rescale_ts(stream.time_base(), transcoder.decoder.time_base());
                transcoder.send_packet_to_decoder(&packet);
                transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
            }
            None => {
                // Do stream copy on non-video streams.
                packet.rescale_ts(ist_time_bases[ist_index], ost_time_base);
                packet.set_position(-1);
                packet.set_stream(ost_index as _);
                packet.write_interleaved(&mut octx).unwrap();
            }
        }
    }

    // Flush encoders and decoders.
    for (ost_index, transcoder) in transcoders.iter_mut() {
        let ost_time_base = ost_time_bases[*ost_index];
        transcoder.send_eof_to_decoder();
        transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
        transcoder.send_eof_to_encoder();
        transcoder.receive_and_process_encoded_packets(&mut octx, ost_time_base);
    }

    octx.write_trailer().unwrap();
}
More examples
Hide additional examples
examples/remux.rs (line 32)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Warning);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    let mut stream_mapping = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 1); ictx.nb_streams() as _];
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        ost_index += 1;
        let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
        ost.set_parameters(ist.parameters());
        // We need to set codec_tag to 0 lest we run into incompatible codec tag
        // issues when muxing into a different container format. Unfortunately
        // there's no high level API to do this (yet).
        unsafe {
            (*ost.parameters().as_mut_ptr()).codec_tag = 0;
        }
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost = octx.stream(ost_index as _).unwrap();
        packet.rescale_ts(ist_time_bases[ist_index], ost.time_base());
        packet.set_position(-1);
        packet.set_stream(ost_index as _);
        packet.write_interleaved(&mut octx).unwrap();
    }

    octx.write_trailer().unwrap();
}
examples/transcode-audio.rs (line 87)
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fn transcoder<P: AsRef<Path>>(
    ictx: &mut format::context::Input,
    octx: &mut format::context::Output,
    path: &P,
    filter_spec: &str,
) -> Result<Transcoder, ffmpeg::Error> {
    let input = ictx
        .streams()
        .best(media::Type::Audio)
        .expect("could not find best audio stream");
    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
    let mut decoder = context.decoder().audio()?;
    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
        .expect("failed to find encoder")
        .audio()?;
    let global = octx
        .format()
        .flags()
        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);

    decoder.set_parameters(input.parameters())?;

    let mut output = octx.add_stream(codec)?;
    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
    let mut encoder = context.encoder().audio()?;

    let channel_layout = codec
        .channel_layouts()
        .map(|cls| cls.best(decoder.channel_layout().channels()))
        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);

    if global {
        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
    }

    encoder.set_rate(decoder.rate() as i32);
    encoder.set_channel_layout(channel_layout);
    encoder.set_channels(channel_layout.channels());
    encoder.set_format(
        codec
            .formats()
            .expect("unknown supported formats")
            .next()
            .unwrap(),
    );
    encoder.set_bit_rate(decoder.bit_rate());
    encoder.set_max_bit_rate(decoder.max_bit_rate());

    encoder.set_time_base((1, decoder.rate() as i32));
    output.set_time_base((1, decoder.rate() as i32));

    let encoder = encoder.open_as(codec)?;
    output.set_parameters(&encoder);

    let filter = filter(filter_spec, &decoder, &encoder)?;

    let in_time_base = decoder.time_base();
    let out_time_base = output.time_base();

    Ok(Transcoder {
        stream: input.index(),
        filter,
        decoder,
        encoder,
        in_time_base,
        out_time_base,
    })
}
source

pub fn add_chapter<R: Into<Rational>, S: AsRef<str>>( &mut self, id: i64, time_base: R, start: i64, end: i64, title: S ) -> Result<ChapterMut<'_>, Error>

Examples found in repository?
examples/chapters.rs (lines 31-37)
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fn main() {
    ffmpeg::init().unwrap();

    match ffmpeg::format::input(&env::args().nth(1).expect("missing input file name")) {
        Ok(ictx) => {
            println!("Nb chapters: {}", ictx.nb_chapters());

            for chapter in ictx.chapters() {
                println!("chapter id {}:", chapter.id());
                println!("\ttime_base: {}", chapter.time_base());
                println!("\tstart: {}", chapter.start());
                println!("\tend: {}", chapter.end());

                for (k, v) in chapter.metadata().iter() {
                    println!("\t{}: {}", k, v);
                }
            }

            let mut octx = ffmpeg::format::output(&"test.mkv").expect("Couldn't open test file");

            for chapter in ictx.chapters() {
                let title = match chapter.metadata().get("title") {
                    Some(title) => String::from(title),
                    None => String::new(),
                };

                match octx.add_chapter(
                    chapter.id(),
                    chapter.time_base(),
                    chapter.start(),
                    chapter.end(),
                    &title,
                ) {
                    Ok(chapter) => println!("Added chapter with id {} to output", chapter.id()),
                    Err(error) => {
                        println!("Error adding chapter with id: {} - {}", chapter.id(), error)
                    }
                }
            }

            println!("\nOuput: nb chapters: {}", octx.nb_chapters());
            for chapter in octx.chapters() {
                println!("chapter id {}:", chapter.id());
                println!("\ttime_base: {}", chapter.time_base());
                println!("\tstart: {}", chapter.start());
                println!("\tend: {}", chapter.end());
                for (k, v) in chapter.metadata().iter() {
                    println!("\t{}: {}", k, v);
                }
            }
        }

        Err(error) => println!("error: {}", error),
    }
}
source

pub fn set_metadata(&mut self, dictionary: Dictionary<'_>)

Examples found in repository?
examples/transcode-audio.rs (line 225)
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fn main() {
    ffmpeg::init().unwrap();

    let input = env::args().nth(1).expect("missing input");
    let output = env::args().nth(2).expect("missing output");
    let filter = env::args().nth(3).unwrap_or_else(|| "anull".to_owned());
    let seek = env::args().nth(4).and_then(|s| s.parse::<i64>().ok());

    let mut ictx = format::input(&input).unwrap();
    let mut octx = format::output(&output).unwrap();
    let mut transcoder = transcoder(&mut ictx, &mut octx, &output, &filter).unwrap();

    if let Some(position) = seek {
        // If the position was given in seconds, rescale it to ffmpegs base timebase.
        let position = position.rescale((1, 1), rescale::TIME_BASE);
        // If this seek was embedded in the transcoding loop, a call of `flush()`
        // for every opened buffer after the successful seek would be advisable.
        ictx.seek(position, ..position).unwrap();
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        if stream.index() == transcoder.stream {
            packet.rescale_ts(stream.time_base(), transcoder.in_time_base);
            transcoder.send_packet_to_decoder(&packet);
            transcoder.receive_and_process_decoded_frames(&mut octx);
        }
    }

    transcoder.send_eof_to_decoder();
    transcoder.receive_and_process_decoded_frames(&mut octx);

    transcoder.flush_filter();
    transcoder.get_and_process_filtered_frames(&mut octx);

    transcoder.send_eof_to_encoder();
    transcoder.receive_and_process_encoded_packets(&mut octx);

    octx.write_trailer().unwrap();
}
More examples
Hide additional examples
examples/remux.rs (line 42)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Warning);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    let mut stream_mapping = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 1); ictx.nb_streams() as _];
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        ost_index += 1;
        let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
        ost.set_parameters(ist.parameters());
        // We need to set codec_tag to 0 lest we run into incompatible codec tag
        // issues when muxing into a different container format. Unfortunately
        // there's no high level API to do this (yet).
        unsafe {
            (*ost.parameters().as_mut_ptr()).codec_tag = 0;
        }
    }

    octx.set_metadata(ictx.metadata().to_owned());
    octx.write_header().unwrap();

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost = octx.stream(ost_index as _).unwrap();
        packet.rescale_ts(ist_time_bases[ist_index], ost.time_base());
        packet.set_position(-1);
        packet.set_stream(ost_index as _);
        packet.write_interleaved(&mut octx).unwrap();
    }

    octx.write_trailer().unwrap();
}
examples/transcode-x264.rs (line 233)
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fn main() {
    let input_file = env::args().nth(1).expect("missing input file");
    let output_file = env::args().nth(2).expect("missing output file");
    let x264_opts = parse_opts(
        env::args()
            .nth(3)
            .unwrap_or_else(|| DEFAULT_X264_OPTS.to_string()),
    )
    .expect("invalid x264 options string");

    eprintln!("x264 options: {:?}", x264_opts);

    ffmpeg::init().unwrap();
    log::set_level(log::Level::Info);

    let mut ictx = format::input(&input_file).unwrap();
    let mut octx = format::output(&output_file).unwrap();

    format::context::input::dump(&ictx, 0, Some(&input_file));

    let best_video_stream_index = ictx
        .streams()
        .best(media::Type::Video)
        .map(|stream| stream.index());
    let mut stream_mapping: Vec<isize> = vec![0; ictx.nb_streams() as _];
    let mut ist_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut ost_time_bases = vec![Rational(0, 0); ictx.nb_streams() as _];
    let mut transcoders = HashMap::new();
    let mut ost_index = 0;
    for (ist_index, ist) in ictx.streams().enumerate() {
        let ist_medium = ist.parameters().medium();
        if ist_medium != media::Type::Audio
            && ist_medium != media::Type::Video
            && ist_medium != media::Type::Subtitle
        {
            stream_mapping[ist_index] = -1;
            continue;
        }
        stream_mapping[ist_index] = ost_index;
        ist_time_bases[ist_index] = ist.time_base();
        if ist_medium == media::Type::Video {
            // Initialize transcoder for video stream.
            transcoders.insert(
                ist_index,
                Transcoder::new(
                    &ist,
                    &mut octx,
                    ost_index as _,
                    x264_opts.to_owned(),
                    Some(ist_index) == best_video_stream_index,
                )
                .unwrap(),
            );
        } else {
            // Set up for stream copy for non-video stream.
            let mut ost = octx.add_stream(encoder::find(codec::Id::None)).unwrap();
            ost.set_parameters(ist.parameters());
            // We need to set codec_tag to 0 lest we run into incompatible codec tag
            // issues when muxing into a different container format. Unfortunately
            // there's no high level API to do this (yet).
            unsafe {
                (*ost.parameters().as_mut_ptr()).codec_tag = 0;
            }
        }
        ost_index += 1;
    }

    octx.set_metadata(ictx.metadata().to_owned());
    format::context::output::dump(&octx, 0, Some(&output_file));
    octx.write_header().unwrap();

    for (ost_index, _) in octx.streams().enumerate() {
        ost_time_bases[ost_index] = octx.stream(ost_index as _).unwrap().time_base();
    }

    for (stream, mut packet) in ictx.packets() {
        let ist_index = stream.index();
        let ost_index = stream_mapping[ist_index];
        if ost_index < 0 {
            continue;
        }
        let ost_time_base = ost_time_bases[ost_index as usize];
        match transcoders.get_mut(&ist_index) {
            Some(transcoder) => {
                packet.rescale_ts(stream.time_base(), transcoder.decoder.time_base());
                transcoder.send_packet_to_decoder(&packet);
                transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
            }
            None => {
                // Do stream copy on non-video streams.
                packet.rescale_ts(ist_time_bases[ist_index], ost_time_base);
                packet.set_position(-1);
                packet.set_stream(ost_index as _);
                packet.write_interleaved(&mut octx).unwrap();
            }
        }
    }

    // Flush encoders and decoders.
    for (ost_index, transcoder) in transcoders.iter_mut() {
        let ost_time_base = ost_time_bases[*ost_index];
        transcoder.send_eof_to_decoder();
        transcoder.receive_and_process_decoded_frames(&mut octx, ost_time_base);
        transcoder.send_eof_to_encoder();
        transcoder.receive_and_process_encoded_packets(&mut octx, ost_time_base);
    }

    octx.write_trailer().unwrap();
}

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impl Send for Output

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