scrwdrv / ffmpeg-command

A simple ffmpeg and ffprobe child process handler, easy to add commands and execute

ffmpeg-command

A simple ffmpeg and ffprobe child process handler, easy to add commands and execute

Installation

In order to be able to use this module, make sure you have FFmpeg installed on your system (including all necessary encoding libraries like libmp3lame or libx264).

• FFmpeg binary

npm i ffmpeg-command

Usage

ffmpeg

import FFmpegCmd from 'ffmpeg-command';

const ffmpegCmd = new FFmpegCmd({ loglevel: 'info', cwd: './video' });

ffmpegCmd.add(`-i example.mp4 -af volumedetect -vn -sn -dn -f null /dev/null`);

console.log(ffmpegCmd.cmd());
//ffmpeg -threads 0 -hide_banner -y -loglevel info -i example.mp4 -af volumedetect -vn -sn -dn -f null /dev/null

ffmpegCmd.exec().then((stdout) => {
    
    console.log(stdout);
    /*
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'example.mp4':
    Metadata:
        major_brand     : mp42
        minor_version   : 0
        compatible_brands: isommp42
        creation_time   : 2018-06-28T20:53:15.000000Z
    Duration: 00:01:45.44, start: 0.000000, bitrate: 571 kb/s
        Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 406x720 [SAR 1:1 DAR 203:360], 441 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
        Metadata:
        creation_time   : 2018-06-28T20:53:15.000000Z
        handler_name    : ISO Media file produced by Google Inc. Created on: 06/28/2018.
        Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
        Metadata:
        creation_time   : 2018-06-28T20:53:15.000000Z
        handler_name    : ISO Media file produced by Google Inc. Created on: 06/28/2018.
    Stream mapping:
    Stream #0:1 -> #0:0 (aac (native) -> pcm_s16le (native))
    Press [q] to stop, [?] for help
    Output #0, null, to 'NUL':
    Metadata:
        major_brand     : mp42
        minor_version   : 0
        compatible_brands: isommp42
        encoder         : Lavf58.29.100
        Stream #0:0(eng): Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default)
        Metadata:
        creation_time   : 2018-06-28T20:53:15.000000Z
        handler_name    : ISO Media file produced by Google Inc. Created on: 06/28/2018.
        encoder         : Lavc58.54.100 pcm_s16le
    size=N/A time=00:01:45.44 bitrate=N/A speed= 462x
    video:0kB audio:18164kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    [Parsed_volumedetect_0 @ 00000236d9632d80] n_samples: 9299968
    [Parsed_volumedetect_0 @ 00000236d9632d80] mean_volume: -22.8 dB
    [Parsed_volumedetect_0 @ 00000236d9632d80] max_volume: -2.7 dB
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_2db: 12
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_3db: 141
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_4db: 367
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_5db: 1027
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_6db: 2215
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_7db: 4398
    [Parsed_volumedetect_0 @ 00000236d9632d80] histogram_8db: 7799 
    */

}).catch((err) => {
    console.log(err);
});

ffprobe

import { ffprobe } from 'ffmpeg-command';

ffprobe('./video/example.mp4').then((json) => {

    console.log(json);
    /* 
    { streams:
    [ { index: 0,
        codec_name: 'h264',
        codec_long_name: 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
        profile: 'Main',
        codec_type: 'video',
        codec_time_base: '1001/48000',
        codec_tag_string: 'avc1',
        codec_tag: '0x31637661',
        width: 406,
        height: 720,
        coded_width: 416,
        coded_height: 720,
        has_b_frames: 1,
        sample_aspect_ratio: '1:1',
        display_aspect_ratio: '203:360',
        pix_fmt: 'yuv420p',
        level: 30,
        color_range: 'tv',
        color_space: 'bt709',
        color_transfer: 'bt709',
        color_primaries: 'bt709',
        chroma_location: 'left',
        refs: 1,
        is_avc: 'true',
        nal_length_size: '4',
        r_frame_rate: '24000/1001',
        avg_frame_rate: '24000/1001',
        time_base: '1/90000',
        start_pts: 0,
        start_time: '0.000000',
        duration_ts: 9489480,
        duration: '105.438667',
        bit_rate: '441202',
        bits_per_raw_sample: '8',
        nb_frames: '2528',
        disposition: [Object],
        tags: [Object] },
        { index: 1,
        codec_name: 'aac',
        codec_long_name: 'AAC (Advanced Audio Coding)',
        profile: 'LC',
        codec_type: 'audio',
        codec_time_base: '1/44100',
        codec_tag_string: 'mp4a',
        codec_tag: '0x6134706d',
        sample_fmt: 'fltp',
        sample_rate: '44100',
        channels: 2,
        channel_layout: 'stereo',
        bits_per_sample: 0,
        r_frame_rate: '0/0',
        avg_frame_rate: '0/0',
        time_base: '1/44100',
        start_pts: 0,
        start_time: '0.000000',
        duration_ts: 4649984,
        duration: '105.441814',
        bit_rate: '125605',
        nb_frames: '4541',
        disposition: [Object],
        tags: [Object] } ],
    format:
    { filename: './video/example.mp4',
        nb_streams: 2,
        nb_programs: 0,
        format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
        format_long_name: 'QuickTime / MOV',
        start_time: '0.000000',
        duration: '105.441811',
        size: '7528318',
        bit_rate: '571182',
        probe_score: 100,
        tags:
        { major_brand: 'mp42',
            minor_version: '0',
            compatible_brands: 'isommp42',
            creation_time: '2018-06-28T20:53:15.000000Z' } } } 
    */

}).catch((err) => {
    console.log(err);
});