pub fn dump(ctx: &Output, index: i32, url: Option<&str>)Examples found in repository?
examples/transcode-x264.rs (line 234)
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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();
}