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  • Video merging ffmpeg taking more than 15 minutes for 5mb video

    27 juillet 2018, par stan wyck

    I am using below ffmpeg command by bravobit ffmpeg android library to merge videos with different resolution and bit rate it takes more than 15 minutes for total of 5mb videos

    -i video1.mp4 -i video2.3gp -filter_complex [1:v]scale=iw*min(1920/iw\,1080/ih):ih*min(1920/iw\,1080/ih),
    pad=1920:1080:(1920-iw*min(1920/iw\,1080/ih))/2:(1080-ih*min(1920/iw\,1080/ih))/2,setsar=1[v1];
    [2:v]scale=iw*min(1920/iw\,1080/ih):ih*min(1920/iw\,1080/ih),
    pad=1920:1080:(1920-iw*min(1920/iw\,1080/ih))/2:(1080-ih*min(1920/iw\,1080/ih))/2,setsar=1[v2];
    [v1][1:a][v2][2:a]concat=n=2:v=1:a=1[outv][outa]
    "-ab", "48000", "-ac", "2", "-ar", "22050", "-s", "1920x1080", "-vcodec", "libx264", "-crf", "27", "-q", "4", "-preset", "ultrafast", newVideoPath, "-hide_banner"

    Log onSuccess

    ffmpeg version n4.0-39-gda39990 Copyright (c) 2000-2018 the FFmpeg developers
    built with gcc 4.9.x (GCC) 20150123 (prerelease)
    configuration : —target-os=linux —cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- —arch=arm —cpu=cortex-a8 —enable-runtime-cpudetect —sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot —enable-pic —enable-libx264 —enable-ffprobe —enable-libopus —enable-libvorbis —enable-libfdk-aac —enable-libfreetype —enable-libfribidi —enable-libmp3lame —enable-fontconfig —enable-libvpx —enable-libass —enable-yasm —enable-pthreads —disable-debug —enable-version3 —enable-hardcoded-tables —disable-ffplay —disable-linux-perf —disable-doc —disable-shared —enable-static —enable-runtime-cpudetect —enable-nonfree —enable-network —enable-avresample —enable-avformat —enable-avcodec —enable-indev=lavfi —enable-hwaccels —enable-ffmpeg —enable-zlib —enable-gpl —enable-small —enable-nonfree —pkg-config=pkg-config —pkg-config-flags=—static —prefix=/root/bravobit/ffmpeg-android/build/armeabi-v7a —extra-cflags=’-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all’ —extra-ldflags=’-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie’ —extra-cxxflags=
    libavutil 56. 14.100 / 56. 14.100
    libavcodec 58. 18.100 / 58. 18.100
    libavformat 58. 12.100 / 58. 12.100
    libavdevice 58. 3.100 / 58. 3.100
    libavfilter 7. 16.100 / 7. 16.100
    libavresample 4. 0. 0 / 4. 0. 0
    libswscale 5. 1.100 / 5. 1.100
    libswresample 3. 1.100 / 3. 1.100
    libpostproc 55. 1.100 / 55. 1.100
    Input #0, lavfi, from ’anullsrc=channel_layout=stereo:sample_rate=44100’ :
    Duration : N/A, start : 0.000000, bitrate : 705 kb/s
    Stream #0:0 : Audio : pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
    Input #1, mov,mp4,m4a,3gp,3g2,mj2, from ’/sdcard/DigitalDashboard/temp/10.57.08.mp4’ :
    Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    encoder : Lavf58.12.100
    Duration : 00:00:15.00, start : 0.000000, bitrate : 1495 kb/s
    Stream #1:0(und) : Video : h264 (avc1 / 0x31637661), yuv420p, 1024x576 [SAR 1:1 DAR 16:9], 1337 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata :
    handler_name : VideoHandler
    Stream #1:1(und) : Audio : aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 153 kb/s (default)
    Metadata :
    handler_name : SoundHandler
    Input #2, mov,mp4,m4a,3gp,3g2,mj2, from ’/sdcard/DigitalDashboard/temp/10.57.19.mp4’ :
    Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    encoder : Lavf58.12.100
    Duration : 00:00:10.03, start : 0.000000, bitrate : 1823 kb/s
    Stream #2:0(und) : Video : h264 (avc1 / 0x31637661), yuv420p, 1024x576 [SAR 1:1 DAR 16:9], 1671 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata :
    handler_name : VideoHandler
    Stream #2:1(und) : Audio : aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 152 kb/s (default)
    Metadata :
    handler_name : SoundHandler
    Stream mapping :
    Stream #1:0 (h264) -> scale
    Stream #1:1 (aac) -> concat:in0:a0
    Stream #2:0 (h264) -> scale
    Stream #2:1 (aac) -> concat:in1:a0
    concat:out:v0 -> Stream #0:0 (libx264)
    concat:out:a0 -> Stream #0:1 (aac)
    Press [q] to stop, [?] for help
    [libx264 @ 0xb8b42e90] -qscale is ignored, -crf is recommended.
    [libx264 @ 0xb8b42e90] using SAR=1/1
    [libx264 @ 0xb8b42e90] using cpu capabilities : ARMv6 NEON
    [libx264 @ 0xb8b42e90] profile Constrained Baseline, level 3.1
    [libx264 @ 0xb8b42e90] 264 - core 152 r2851M ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options : cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=27.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
    Output #0, mp4, to ’/sdcard/DigitalDashboard/temp/10.57.25.mp4’ :
    Metadata :
    encoder : Lavf58.12.100
    Stream #0:0 : Video : h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1024x576 [SAR 1:1 DAR 16:9], q=-1—1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata :
    encoder : Lavc58.18.100 libx264
    Side data :
    cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1
    Stream #0:1 : Audio : aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 48 kb/s (default)
    Metadata :
    encoder : Lavc58.18.100 aac
    frame= 7 fps=0.0 q=0.0 size= 0kB time=00:00:00.37 bitrate= 1.0kbits/s speed=0.737x
    frame= 21 fps= 21 q=27.0 size= 0kB time=00:00:00.88 bitrate= 0.4kbits/s speed=0.879x
    frame= 35 fps= 23 q=26.0 size= 256kB time=00:00:01.48 bitrate=1411.5kbits/s speed=0.979x
    frame= 50 fps= 25 q=27.0 size= 256kB time=00:00:02.04 bitrate=1026.5kbits/s speed=1.01x
    frame= 64 fps= 25 q=26.0 size= 512kB time=00:00:02.60 bitrate=1612.9kbits/s speed=1.02x
    frame= 79 fps= 26 q=25.0 size= 768kB time=00:00:03.20 bitrate=1963.5kbits/s speed=1.05x
    frame= 95 fps= 26 q=22.0 size= 768kB time=00:00:03.85 bitrate=1632.3kbits/s speed=1.07x
    frame= 110 fps= 27 q=24.0 size= 1024kB time=00:00:04.45 bitrate=1881.7kbits/s speed=1.08x
    frame= 126 fps= 27 q=23.0 size= 1024kB time=00:00:05.10 bitrate=1642.2kbits/s speed= 1.1x
    frame= 142 fps= 27 q=24.0 size= 1280kB time=00:00:05.75 bitrate=1821.0kbits/s speed=1.11x
    frame= 157 fps= 28 q=23.0 size= 1280kB time=00:00:06.31 bitrate=1660.3kbits/s speed=1.11x
    frame= 173 fps= 28 q=25.0 size= 1536kB time=00:00:06.96 bitrate=1806.4kbits/s speed=1.12x
    frame= 189 fps= 28 q=26.0 size= 1536kB time=00:00:07.61 bitrate=1652.2kbits/s speed=1.13x
    frame= 204 fps= 28 q=25.0 size= 1792kB time=00:00:08.21 bitrate=1786.0kbits/s speed=1.14x
    frame= 220 fps= 28 q=19.0 size= 1792kB time=00:00:08.87 bitrate=1655.1kbits/s speed=1.15x
    frame= 238 fps= 29 q=18.0 size= 2048kB time=00:00:09.56 bitrate=1753.8kbits/s speed=1.16x
    frame= 254 fps= 29 q=26.0 size= 2048kB time=00:00:10.26 bitrate=1634.7kbits/s speed=1.17x
    frame= 271 fps= 29 q=22.0 size= 2048kB time=00:00:10.91 bitrate=1537.3kbits/s speed=1.18x
    frame= 288 fps= 30 q=21.0 size= 2048kB time=00:00:11.56 bitrate=1450.9kbits/s speed=1.19x
    frame= 305 fps= 30 q=19.0 size= 2304kB time=00:00:12.26 bitrate=1539.5kbits/s speed=1.19x
    frame= 320 fps= 30 q=21.0 size= 2304kB time=00:00:12.86 bitrate=1467.3kbits/s speed=1.19x
    frame= 337 fps= 30 q=22.0 size= 2304kB time=00:00:13.51 bitrate=1396.7kbits/s speed=1.19x
    frame= 354 fps= 30 q=22.0 size= 2304kB time=00:00:14.21 bitrate=1328.2kbits/s speed= 1.2x
    frame= 371 fps= 30 q=20.0 size= 2560kB time=00:00:14.90 bitrate=1406.8kbits/s speed=1.21x
    frame= 387 fps= 30 q=25.0 size= 2560kB time=00:00:15.51 bitrate=1352.1kbits/s speed=1.21x
    frame= 402 fps= 30 q=27.0 size= 2816kB time=00:00:16.11 bitrate=1431.6kbits/s speed= 1.2x
    frame= 416 fps= 30 q=27.0 size= 2816kB time=00:00:16.67 bitrate=1383.7kbits/s speed= 1.2x
    frame= 430 fps= 30 q=27.0 size= 3072kB time=00:00:17.27 bitrate=1456.7kbits/s speed= 1.2x
    frame= 444 fps= 30 q=26.0 size= 3072kB time=00:00:17.83 bitrate=1411.2kbits/s speed=1.19x
    frame= 460 fps= 30 q=25.0 size= 3328kB time=00:00:18.43 bitrate=1478.8kbits/s speed=1.19x
    frame= 476 fps= 30 q=21.0 size= 3584kB time=00:00:19.08 bitrate=1538.3kbits/s speed=1.19x
    frame= 493 fps= 30 q=23.0 size= 3584kB time=00:00:19.78 bitrate=1484.1kbits/s speed= 1.2x
    frame= 511 fps= 30 q=24.0 size= 3840kB time=00:00:20.48 bitrate=1536.0kbits/s speed= 1.2x
    frame= 527 fps= 30 q=23.0 size= 4096kB time=00:00:21.13 bitrate=1588.0kbits/s speed= 1.2x
    frame= 542 fps= 30 q=25.0 size= 4096kB time=00:00:21.78 bitrate=1540.6kbits/s speed=1.21x
    frame= 558 fps= 30 q=25.0 size= 4352kB time=00:00:22.38 bitrate=1592.7kbits/s speed=1.21x
    frame= 574 fps= 30 q=25.0 size= 4352kB time=00:00:22.98 bitrate=1550.9kbits/s speed=1.21x
    frame= 590 fps= 30 q=24.0 size= 4608kB time=00:00:23.63 bitrate=1597.0kbits/s speed=1.21x
    frame= 607 fps= 30 q=17.0 size= 4608kB time=00:00:24.38 bitrate=1548.3kbits/s speed=1.21x
    frame= 622 fps= 30 q=19.0 size= 4608kB time=00:00:24.93 bitrate=1513.7kbits/s speed=1.21x
    frame= 625 fps= 30 q=-1.0 Lsize= 4827kB time=00:00:25.03 bitrate=1579.9kbits/s speed=1.21x
    video:4345kB audio:470kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 0.251744%
    [libx264 @ 0xb8b42e90] frame I:3 Avg QP:20.33 size : 86455
    [libx264 @ 0xb8b42e90] frame P:622 Avg QP:23.46 size : 6736
    [libx264 @ 0xb8b42e90] mb I I16..4 : 100.0% 0.0% 0.0%
    [libx264 @ 0xb8b42e90] mb P I16..4 : 1.8% 0.0% 0.0% P16..4 : 37.9% 0.0% 0.0% 0.0% 0.0% skip:60.3%
    [libx264 @ 0xb8b42e90] coded y,uvDC,uvAC intra : 41.0% 51.8% 22.0% inter : 15.3% 10.0% 0.8%
    [libx264 @ 0xb8b42e90] i16 v,h,dc,p : 29% 27% 24% 20%
    [libx264 @ 0xb8b42e90] i8c dc,h,v,p : 42% 23% 22% 14%
    [libx264 @ 0xb8b42e90] kb/s:1423.72
    [aac @ 0xb8b81070] Qavg : 472.000

  • Not all portions of video play well after concatenation

    24 septembre 2018, par srgbnd

    Node.JS 8.11.4, fluent-ffmpeg 2.1.2

    I need to concatenate random portions of the same length of different videos in one video file. The concatenation proceeds without errors. But when I play the final concatenated file I see some portions playing well with sound, others have video "frozen" but sounds playing.

    What’s the problem ? I want all portions playing well in the final concatenated file.

    Concatenation config :

    trex@cave:/media/trex/safe1/Development/app$ head concat_config.txt
    
file /media/trex/safe1/Development/app/videos/test/417912400.mp4
    
inpoint 145
    
outpoint 155
    
file /media/trex/safe1/Development/app/videos/test/440386842.mp4
    
inpoint 59
    
outpoint 69
    
file /media/trex/safe1/Development/app/videos/test/417912400.mp4
    
inpoint 144
    
outpoint 154
    
    ...

    In total, I have 16 portions of 2 videos. Duration of a portion is 10 sec. In the future the number of video files and portions will be much bigger.

    trex@cave:/media/trex/safe1/Development/app$ ls -lh videos/test/
    
total 344M
    
-rw-r--r-- 1 trex trex  90M set 23 12:19 417912400.mp4
    
-rw-r--r-- 1 trex trex 254M set 23 12:19 440386842.mp4

    JavaScript code for the concatentaion :

    const fs = require('fs');
    
const path = require('path');
    
const _ = require('lodash');
    
const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
    
const ffprobePath = require('@ffprobe-installer/ffprobe').path;
    
const ffmpeg = require('fluent-ffmpeg');
    
ffmpeg.setFfmpegPath(ffmpegPath);
    
ffmpeg.setFfprobePath(ffprobePath);
    

    

    
function getMetadata(absPathToFile) {
    
  return new Promise(function (resolve, reject) {
    
    ffmpeg.ffprobe(absPathToFile, function(err, metadata) {
    
      if (err) {
    
        reject('get video meta: ' + err.toString());
    
      }
    
      resolve(metadata);
    
    });
    
  });
    
}
    

    
async function getFormat(files) {
    
  const pArray = files.map(async f => {
    
    const meta = await getMetadata(f);
    
    meta.format.short_filename = meta.format.filename.split('/').pop();
    
    return meta.format;
    
  });
    
  return await Promise.all(pArray);
    
}
    

    
function getSliceValues(duration, max = 10) {
    
  max = duration < max ? duration * 0.5 : max; // sec
    
  const start = _.random(0, duration * 0.9);
    
  const end = start + max > duration ? duration : start + max;
    
  return `inpoint ${Math.floor(start)}\noutpoint ${Math.floor(end)}\n`;
    
}
    

    
function addPath(arr, aPath) {
    
  return arr.map(e => path.join(aPath, e));
    
}
    

    
function createConfig(meta) {
    
  return meta.map(video => `file ${video.filename}\n${getSliceValues(video.duration)}`).join('');
    
}
    

    
function duplicateMeta(meta) {
    
  for (let i = 0; i < 3; i++) {
    
    meta.push(...meta);
    
  }
    
  return _.shuffle(meta);
    
}
    

    
const videoFolder = path.join(__dirname, 'videos/test');
    
const finalVideo = 'final_video.mp4';
    
const configFile = 'concat_config.txt'; 
    

    
// main
    
(async () => {
    
  let videos = addPath(fs.readdirSync(videoFolder), videoFolder);
    

    
  let meta = await getFormat(videos);
    
  meta = duplicateMeta(meta); // get multiple portions of videos
    

    
  fs.writeFileSync(configFile, createConfig(meta));
    

    
  const mpeg = ffmpeg();
    
  mpeg.input(configFile)
    
    .inputOptions(['-f concat', '-safe 0'])
    
    .outputOptions('-c copy')
    
    .save(finalVideo);
    
})();

    Video files formats :

    { streams: 
    
   [ { index: 0,
    
       codec_name: 'h264',
    
       codec_long_name: 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
    
       profile: 'High',
    
       codec_type: 'video',
    
       codec_time_base: '1001/60000',
    
       codec_tag_string: 'avc1',
    
       codec_tag: '0x31637661',
    
       width: 1920,
    
       height: 1080,
    
       coded_width: 1920,
    
       coded_height: 1088,
    
       has_b_frames: 2,
    
       sample_aspect_ratio: '1:1',
    
       display_aspect_ratio: '16:9',
    
       pix_fmt: 'yuv420p',
    
       level: 40,
    
       color_range: 'tv',
    
       color_space: 'bt709',
    
       color_transfer: 'bt709',
    
       color_primaries: 'bt709',
    
       chroma_location: 'left',
    
       field_order: 'unknown',
    
       timecode: 'N/A',
    
       refs: 1,
    
       is_avc: 'true',
    
       nal_length_size: 4,
    
       id: 'N/A',
    
       r_frame_rate: '30000/1001',
    
       avg_frame_rate: '30000/1001',
    
       time_base: '1/30000',
    
       start_pts: 0,
    
       start_time: 0,
    
       duration_ts: 4936900,
    
       duration: 164.563333,
    
       bit_rate: 4323409,
    
       max_bit_rate: 'N/A',
    
       bits_per_raw_sample: 8,
    
       nb_frames: 4932,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] },
    
     { index: 1,
    
       codec_name: 'aac',
    
       codec_long_name: 'AAC (Advanced Audio Coding)',
    
       profile: 'LC',
    
       codec_type: 'audio',
    
       codec_time_base: '1/48000',
    
       codec_tag_string: 'mp4a',
    
       codec_tag: '0x6134706d',
    
       sample_fmt: 'fltp',
    
       sample_rate: 48000,
    
       channels: 2,
    
       channel_layout: 'stereo',
    
       bits_per_sample: 0,
    
       id: 'N/A',
    
       r_frame_rate: '0/0',
    
       avg_frame_rate: '0/0',
    
       time_base: '1/48000',
    
       start_pts: 0,
    
       start_time: 0,
    
       duration_ts: 7899120,
    
       duration: 164.565,
    
       bit_rate: 256000,
    
       max_bit_rate: 263232,
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 7714,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] } ],
    
  format: 
    
   { filename: '/media/trex/safe1/Development/app/videos/test/417912400.mp4',
    
     nb_streams: 2,
    
     nb_programs: 0,
    
     format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
    
     format_long_name: 'QuickTime / MOV',
    
     start_time: 0,
    
     duration: 164.565,
    
     size: 94298844,
    
     bit_rate: 4584150,
    
     probe_score: 100,
    
     tags: 
    
      { major_brand: 'mp42',
    
        minor_version: '0',
    
        compatible_brands: 'mp42mp41isomavc1',
    
        creation_time: '2015-09-21T19:11:21.000000Z' } },
    
  chapters: [] }
    
{ streams: 
    
   [ { index: 0,
    
       codec_name: 'h264',
    
       codec_long_name: 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
    
       profile: 'High',
    
       codec_type: 'video',
    
       codec_time_base: '1001/48000',
    
       codec_tag_string: 'avc1',
    
       codec_tag: '0x31637661',
    
       width: 2560,
    
       height: 1440,
    
       coded_width: 2560,
    
       coded_height: 1440,
    
       has_b_frames: 2,
    
       sample_aspect_ratio: '1:1',
    
       display_aspect_ratio: '16:9',
    
       pix_fmt: 'yuv420p',
    
       level: 51,
    
       color_range: 'tv',
    
       color_space: 'bt709',
    
       color_transfer: 'bt709',
    
       color_primaries: 'bt709',
    
       chroma_location: 'left',
    
       field_order: 'unknown',
    
       timecode: 'N/A',
    
       refs: 1,
    
       is_avc: 'true',
    
       nal_length_size: 4,
    
       id: 'N/A',
    
       r_frame_rate: '24000/1001',
    
       avg_frame_rate: '24000/1001',
    
       time_base: '1/24000',
    
       start_pts: 0,
    
       start_time: 0,
    
       duration_ts: 4206200,
    
       duration: 175.258333,
    
       bit_rate: 11891834,
    
       max_bit_rate: 'N/A',
    
       bits_per_raw_sample: 8,
    
       nb_frames: 4202,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] },
    
     { index: 1,
    
       codec_name: 'aac',
    
       codec_long_name: 'AAC (Advanced Audio Coding)',
    
       profile: 'LC',
    
       codec_type: 'audio',
    
       codec_time_base: '1/48000',
    
       codec_tag_string: 'mp4a',
    
       codec_tag: '0x6134706d',
    
       sample_fmt: 'fltp',
    
       sample_rate: 48000,
    
       channels: 2,
    
       channel_layout: 'stereo',
    
       bits_per_sample: 0,
    
       id: 'N/A',
    
       r_frame_rate: '0/0',
    
       avg_frame_rate: '0/0',
    
       time_base: '1/48000',
    
       start_pts: 0,
    
       start_time: 0,
    
       duration_ts: 8414160,
    
       duration: 175.295,
    
       bit_rate: 256000,
    
       max_bit_rate: 262152,
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 8217,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] } ],
    
  format: 
    
   { filename: '/media/trex/safe1/Development/app/videos/test/440386842.mp4',
    
     nb_streams: 2,
    
     nb_programs: 0,
    
     format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
    
     format_long_name: 'QuickTime / MOV',
    
     start_time: 0,
    
     duration: 175.295,
    
     size: 266214940,
    
     bit_rate: 12149345,
    
     probe_score: 100,
    
     tags: 
    
      { major_brand: 'mp42',
    
        minor_version: '0',
    
        compatible_brands: 'mp42mp41isomavc1',
    
        creation_time: '2015-11-15T19:30:49.000000Z' } },
    
  chapters: [] }

  • Is there a way to filter out I/B/P frames in an MPEG Video stream and access the macroblock information ?

    1er mars 2014, par Vixian

    I am trying make a program for video analysis of MPEG streams in C or C++.

    I was able to find out the frame types in a video file using

    ffprobe -show_frames -pretty File.mpg | grep 'pict_type' > pict_type.txt

    However based on the order of the frames, it seems that they are in "display" (IBBPBBP...) order not in "transmission" order (IPBBPBBPBB...) and it's not exactly ideal way of doing things as I can't assure the command didn't skip any frames or anything as it's outside of my program.

    I have tried OpenCV, but it appears the information I require is too low-level for OpenCV and I believe the solution lies in ffmpeg or libavcodec but the documentation is a nightmare past the CLI. Although I am open to other solutions !

    The information I require are :

    • The type of each frame (I, B, or P)
    • The total number of macroblocks inside a frame
    • The number of intra-coded macroblocks inside a P frame
    • The number of both forward and backward predicted macroblocks inside a B frame
    • The number of just backward predicted macroblocks inside a B frame
    • The number of just forward predircted macroblocks inside a B frame

    I would be very grateful for your help !

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