ac-ffmpeg 0.19.0

Simple and safe Rust interface for FFmpeg libraries.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

use std::fs::File;

use ac_ffmpeg::{
    codec::CodecParameters,
    format::{
        demuxer::{Demuxer, DemuxerWithStreamInfo},
        io::IO,
        muxer::{Muxer, OutputFormat},
    },
    Error,
};
use clap::{Arg, Command};

/// Open a given input file.
fn open_input(path: &str) -> Result<DemuxerWithStreamInfo<File>, Error> {
    let input = File::open(path)
        .map_err(|err| Error::new(format!("unable to open input file {}: {}", path, err)))?;

    let io = IO::from_seekable_read_stream(input);

    Demuxer::builder()
        .build(io)?
        .find_stream_info(None)
        .map_err(|(_, err)| err)
}

/// Open a given output file.
fn open_output(path: &str, elementary_streams: &[CodecParameters]) -> Result<Muxer<File>, Error> {
    let output_format = OutputFormat::guess_from_file_name(path)
        .ok_or_else(|| Error::new(format!("unable to guess output format for file: {}", path)))?;

    let output = File::create(path)
        .map_err(|err| Error::new(format!("unable to create output file {}: {}", path, err)))?;

    let io = IO::from_seekable_write_stream(output);

    let mut muxer_builder = Muxer::builder();

    for codec_parameters in elementary_streams {
        muxer_builder.add_stream(codec_parameters)?;
    }

    muxer_builder.build(io, output_format)
}

/// Convert a given input file into a given output file.
fn convert(input: &str, output: &str) -> Result<(), Error> {
    let mut demuxer = open_input(input)?;

    let codec_parameters = demuxer
        .streams()
        .iter()
        .map(|stream| stream.codec_parameters())
        .collect::<Vec<_>>();

    let mut muxer = open_output(output, &codec_parameters)?;

    // process data
    while let Some(packet) = demuxer.take()? {
        muxer.push(packet)?;
    }

    // flush the muxer
    muxer.flush()
}

fn main() {
    let matches = Command::new("muxing")
        .arg(
            Arg::new("input")
                .required(true)
                .value_name("INPUT")
                .help("Input file"),
        )
        .arg(
            Arg::new("output")
                .required(true)
                .value_name("OUTPUT")
                .help("Output file"),
        )
        .get_matches();

    let input_filename = matches.get_one::<String>("input").unwrap();
    let output_filename = matches.get_one::<String>("output").unwrap();

    if let Err(err) = convert(input_filename, output_filename) {
        eprintln!("ERROR: {}", err);
    }
}