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Sur d’autres sites (9727)

  • Video - extract image from DASH m4s file using ffmpeg

    6 juillet 2017, par Yogevnn

    I’m trying to create a thumbnail from a dash stream m4s file.

    I have the mpd, init.mp4 file and the m4s files.

    I have the code using nodeJS ffmpeg package that extracts image from an mp4 file :

    try {
    
var process = new ffmpeg('video.mp4');
    
process.then(function (video) {
    
    // Callback mode
    
    video.fnExtractFrameToJPG('C:\\files\\nodejs', {
    
        start_time: `1:50:30`,
    
        frame_rate : 1,
    
        file_name : 'my_frame_%t_%s'
    
    }, function (error, files) {
    
        if (!error)
    
            console.log('Frames: ' + files);
    
    });
    
}, function (err) {
    
    console.log('Error: ' + err);
    
});
    
} catch (e) {
    
console.log(e.code);
    
console.log(e.msg);
    
}

    But because i’m reading my files from a dash-stream i’m getting an m4s files.

    I’ve tried to convert the m4s format into mp4 and then use the code above, but the ffmpeg( fluent-ffmpeg to be exact) is returning an error message

    an error occured : ffmpeg exited with code 1 :
    C :\files\nodejs\testFiles\000000.m4s : Invalid data found when
    processing input

    The code i used to convert is :

    var proc = new fluent({source: "C:\\files\\nodejs\\testFiles\\000000.m4s", 
    
nolog: true})
    

    
//useless i think - not working
    
//proc.setFfmpegPath("C:\\files\\ffmpeg-20170620-ae6f6d4-win64-static\\bin")
    

    
proc.withSize('50%').withFps(24).toFormat('mp4')
    

    
.on('end', function(){
    
console.log('file has been converted successfully');
    
})
    
.on('error', function(err){
    
    console.log('an error occured: ' + err.message);
    

    
})
    

    
.saveToFile("C:\\files\\nodejs\\new.mp4");

    Is it possible to convert a single m4s file to mp4 ?

    If not, what is the right way of converting m4s to mp4 using ffmpeg with nodejs ?

    I couldn’t find any reference for that, but if it is possible to extract an image directly from the m4s file i think it will solve the problem faster.

    It is possible to use this site to download all the *.m4s files, mpd and init.mp4 files using the network section (f12 in Chrome browser) and check the code.

  • FFMPEG ldash 1 low latency option but dash.js not low latency and buggy with lag and start always at 0 cannot control

    7 avril 2021, par Jintor

    I can't figure out how to fix this. playing a supposed low latency mpeg-dash manifest but it's with lots of lag, and play-stop-wait-play-stop-wait....

    


    I have latest ubuntu with latest ffmpeg

    


    here the command

    


    ffmpeg -re -i file.webm -c:v libx264 -preset ultrafast -tune zerolatency -c:a aac -ac 2 -strict -2 -crf 18 -profile:v baseline -maxrate 1000k -pix_fmt yuv420p -bufsize 969k -ldash 1 -streaming 1 -use_template 0 -use_timeline 1 -seg_duration 1 -remove_at_exit 0 -f dash index.mpd


    


    and player side

    


    <code class="echappe-js">&lt;script src='http://stackoverflow.com/templates/account_js/dashjs/dash.3.1.0.min.js'&gt;&lt;/script&gt;&#xA;    
    

    &#xA;    &lt;script&gt;&amp;#xA;    (function(){&amp;#xA;        var url = &quot;index.mpd&quot;;&amp;#xA;        var player = dashjs.MediaPlayer().create();&amp;#xA;        player.initialize(document.querySelector(&quot;#videoPlayer&quot;), url, true);&amp;#xA;        player.updateSettings({&amp;#xA;            streaming: {&amp;#xA;                 lowLatencyEnabled: true, &amp;#xA;                 liveDelay: 3,&amp;#xA;                 liveCatchup: {&amp;#xA;                    enabled: true,&amp;#xA;                    minDrift: 0.05,&amp;#xA;                    maxDrift: 0,&amp;#xA;                    playbackRate: 0.5,&amp;#xA;                    latencyThreshold: 30    &amp;#xA;                  }&amp;#xA;            }&amp;#xA;        });&amp;#xA;    })();     &amp;#xA;    video = document.getElementById(&quot;videoPlayer&quot;);&amp;#xA;    video.addEventListener(&quot;loadedmetadata&quot;, function(){ video.muted = true; video.play(); }, false);&amp;#xA;    &lt;/script&gt;&#xA;

    &#xA;

    but it's NOT low latency, It forces to start at 0 and cannot control the video

    &#xA;

    is there a better config setup and what need to be fixed : ffmpeg options or dash.js config

    &#xA;

  • Dash timestamp : 41390056 is out of range for mov/mp4 format

    26 octobre 2017, par mike

    I’m trying to convert a aac stream to dash. The issue is that I get a lot of errors as below(though it seems to segment it into multiple files but I get errors on the player too). The question is why do I get these errors and how can I fix it ? If I simply convert "copy" it into to a single mp4 file it works without error.

        ffmpeg -i  "a.mkv" -y -map  0:1 -c:0 copy -min_seg_duration 1000000 
    
-use_timeline 1 -use_template 1 -init_seg_name init.mp4s 
    
-media_seg_name  "\$Number\$.mp4s" -adaptation_sets "id=1,streams=0"
    
-remove_at_exit 0  -f dash -dash 1 
    
"out/stream.mpd" -loglevel error

    Output

    [mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 40475608 is out of range for mov/mp4 format
    
[mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 40764376 is out of range for mov/mp4 format
    
[mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 40860664 is out of range for mov/mp4 format
    
[mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 41149432 is out of range for mov/mp4 format
    
[mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 41390056 is out of range for mov/mp4 format
    
[mp4 @ 0x7fbb70819600] Application provided duration: -32 / timestamp: 41823208 is out of range for mov/mp4 format

    Copy to a single MP4 works just fine
    ffmpeg -i "a.mkv" -y -map 0:1 -c:0 copy -f mp4 -dash 1 "out/out.mp4" -loglevel error

    Probe

    ffprobe a.mkv
    
ffprobe version 3.4 Copyright (c) 2007-2017 the FFmpeg developers
    
  built with Apple LLVM version 9.0.0 (clang-900.0.37)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, matroska,webm, from 'a.mkv':
    
  Metadata:
    
    encoder         : libebml v1.3.1 + libmatroska v1.4.2
    
    creation_time   : 2017-03-11T02:56:50.000000Z
    
  Duration: 02:12:52.39, start: 0.000000, bitrate: 740 kb/s
    
    Chapter #0:0: start 0.000000, end 520.270000
    
    Metadata:
    
      title           : 00:00:00.000
    
    Chapter #0:1: start 520.270000, end 1135.718000
    
    Metadata:
    
      title           : 00:08:40.270
    
    Chapter #0:2: start 1135.718000, end 1703.660000
    
    Metadata:
    
      title           : 00:18:55.718
    
    Chapter #0:3: start 1703.660000, end 2314.187000
    
    Metadata:
    
      title           : 00:28:23.660
    
    Chapter #0:4: start 2314.187000, end 2888.594000
    
    Metadata:
    
      title           : 00:38:34.187
    
    Chapter #0:5: start 2888.594000, end 3499.246000
    
    Metadata:
    
      title           : 00:48:08.594
    
    Chapter #0:6: start 3499.246000, end 4154.692000
    
    Metadata:
    
      title           : 00:58:19.246
    
    Chapter #0:7: start 4154.692000, end 4646.392000
    
    Metadata:
    
      title           : 01:09:14.692
    
    Chapter #0:8: start 4646.392000, end 5373.660000
    
    Metadata:
    
      title           : 01:17:26.392
    
    Chapter #0:9: start 5373.660000, end 5882.085000
    
    Metadata:
    
      title           : 01:29:33.660
    
    Chapter #0:10: start 5882.085000, end 6627.871000
    
    Metadata:
    
      title           : 01:38:02.085
    
    Chapter #0:11: start 6627.871000, end 7144.471000
    
    Metadata:
    
      title           : 01:50:27.871
    
    Chapter #0:12: start 7144.471000, end 7451.944000
    
    Metadata:
    
      title           : 01:59:04.471
    
    Chapter #0:13: start 7451.944000, end 7972.394000
    
    Metadata:
    
      title           : 02:04:11.944
    
    Stream #0:0(eng): Video: h264 (High), yuv420p(tv, bt709/unknown/unknown, progressive), 720x300 [SAR 1:1 DAR 12:5], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    
    Metadata:
    
      title           : X264
    
      BPS             : 623765
    
      BPS-eng         : 623765
    
      DURATION        : 02:12:52.311000000
    
      DURATION-eng    : 02:12:52.311000000
    
      NUMBER_OF_FRAMES: 191144
    
      NUMBER_OF_FRAMES-eng: 191144
    
      NUMBER_OF_BYTES : 621606403
    
      NUMBER_OF_BYTES-eng: 621606403
    
      _STATISTICS_WRITING_APP: mkvmerge v8.3.0 ('Over the Horizon') 64bit
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v8.3.0 ('Over the Horizon') 64bit
    
      _STATISTICS_WRITING_DATE_UTC: 2017-03-11 02:56:50
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-03-11 02:56:50
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
    Stream #0:1(eng): Audio: aac (LC), 48000 Hz, stereo, fltp (default)
    
    Metadata:
    
      BPS             : 114797
    
      BPS-eng         : 114797
    
      DURATION        : 02:12:52.394000000
    
      DURATION-eng    : 02:12:52.394000000
    
      NUMBER_OF_FRAMES: 373706
    
      NUMBER_OF_FRAMES-eng: 373706
    
      NUMBER_OF_BYTES : 114401387
    
      NUMBER_OF_BYTES-eng: 114401387
    
      _STATISTICS_WRITING_APP: mkvmerge v8.3.0 ('Over the Horizon') 64bit
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v8.3.0 ('Over the Horizon') 64bit
    
      _STATISTICS_WRITING_DATE_UTC: 2017-03-11 02:56:50
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-03-11 02:56:50
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES

    Shaka debug

    Assertion failed: This should be an update of the last segment in a period
    
shaka.media.SegmentIndex.merge @ segment_index.js:153
    
shaka.dash.SegmentTemplate.createStream @ segment_template.js:82
    
shaka.dash.DashParser.parseRepresentation_ @ dash_parser.js:1080
    
shaka.dash.DashParser.parseAdaptationSet_ @ dash_parser.js:978
    
shaka.dash.DashParser.parsePeriod_ @ dash_parser.js:722
    
shaka.dash.DashParser.parsePeriods_ @ dash_parser.js:626
    
shaka.dash.DashParser.processManifest_ @ dash_parser.js:520
    
(anonymous) @ dash_parser.js:431
    
Promise resolved (async)
    
shaka.dash.DashParser.parseManifest_ @ dash_parser.js:430
    
(anonymous) @ dash_parser.js:397
    
Promise resolved (async)
    
shaka.dash.DashParser.requestManifest_ @ dash_parser.js:390
    
shaka.dash.DashParser.onUpdate_ @ dash_parser.js:1161
    
setTimeout (async)
    
shaka.dash.DashParser.setUpdateTimer_ @ dash_parser.js:1209
    
(anonymous) @ dash_parser.js:331
    
Promise resolved (async)
    
shaka.dash.DashParser.start @ dash_parser.js:329
    
(anonymous) @ player.js:555
    
Promise resolved (async)
    
shaka.util.CancelableChain.then @ cancelable_chain.js:72
    
shaka.Player.load @ player.js:499
    
initPlayer @ ?x=149&amp;y=88&amp;q=http%3A%2F%2Flocalhost%3A8080%2Fmeta%2F%3FbucketID%3D%2FVolumes%2FTV%2FFa%26channelID%3D%2FVolumes%2FTV%26containerID%3D%2FUsers%2F%2Fbrev%%2FL1ZvbHVtZXMvVFYvRmFudGFzdGljLkJlYXN0cy5hbmQuV2hlcmUudG8uRmluZC5UaGVtLjIwMTYuQkRSaXAueDI2NC1TUEFSS1MvYS5ta3Y%2F97M4TS6IqnQ.mpd:392
    
463segment_index.js:145 Refusing to rewrite original references on update!
    
shaka.media.SegmentIndex.merge @ segment_index.js:145
    
shaka.dash.SegmentTemplate.createStream @ segment_template.js:82
    
shaka.dash.DashParser.parseRepresentation_ @ dash_parser.js:1080
    
shaka.dash.DashParser.parseAdaptationSet_ @ dash_parser.js:978
    
shaka.dash.DashParser.parsePeriod_ @ dash_parser.js:722
    
shaka.dash.DashParser.parsePeriods_ @ dash_parser.js:626
    
shaka.dash.DashParser.processManifest_ @ dash_parser.js:520
    
(anonymous) @ dash_parser.js:431
    
Promise resolved (async)
    
shaka.dash.DashParser.parseManifest_ @ dash_parser.js:430
    
(anonymous) @ dash_parser.js:397
    
Promise resolved (async)
    
shaka.dash.DashParser.requestManifest_ @ dash_parser.js:390
    
shaka.dash.DashParser.onUpdate_ @ dash_parser.js:1161
    
setTimeout (async)
    
shaka.dash.DashParser.setUpdateTimer_ @ dash_parser.js:1209
    
(anonymous) @ dash_parser.js:331
    
Promise resolved (async)
    
shaka.dash.DashParser.start @ dash_parser.js:329
    
(anonymous) @ player.js:555
    
Promise resolved (async)
    
shaka.util.CancelableChain.then @ cancelable_chain.js:72
    
shaka.Player.load @ player.js:499
    
initPlayer @ ?x=149&amp;y=88&amp;q=http%3A%2F%2Flocalhost%3A8080%2Fmeta%2F%3FbucketID%3D%2FVolumes%2FTV%2FFa%26channelID%3D%2FVolumes%2FTV%26containerID%3D%2FUsers%2F%2Fbrev%%2FL1ZvbHVtZXMvVFYvRmFudGFzdGljLkJlYXN0cy5hbmQuV2hlcmUudG8uRmluZC5UaGVtLjIwMTYuQkRSaXAueDI2NC1TUEFSS1MvYS5ta3Y%2F97M4TS6IqnQ.mpd:392

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