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• Problem recording RTP from mediasoup router using ffmpeg

  22 juin 2021, par Scramjet

  I have a mediasoup server setup where I now need recording feature. To accomplish this I am doing the following -
  
On getting the event to start recording I call this function :

  


  async handleStartRecording(peer, router)
    {
        let transports = [],
            consumers = [],
            ffmpegInput = {};
        for(let entry of peer.producers.entries())
        {
            const rtpTransport = await router.createPlainTransport({
                comedia: false,
                rtcpMux: false,
                listenIp: { ip: '127.0.0.1', announcedIp: null }
            });
            transports.push(rtpTransport);

            const port = (entry[1].kind === 'audio') ? 8994 : 8996;
            const rtcpPort = port+1;

            await rtpTransport.connect({
                ip: '127.0.0.1',
                port: port,
                rtcpPort: rtcpPort,
                rtcpMux: false
            });
            peer.addTransport(rtpTransport.id, rtpTransport);

            const rtpConsumer = await rtpTransport.consume({
                producerId: entry[0],
                rtpCapabilities: router.rtpCapabilities, 
                paused: true,
            });
            consumers.push(rtpConsumer);

            const codecs = [];
            const routerCodec = router.rtpCapabilities.codecs.find(
              codec => codec.kind === entry[1].kind
            );
            codecs.push(routerCodec);
            const rtpCapabilities = {
                codecs,
                rtcpFeedback: []
            };

            ffmpegInput[entry[1].kind] = {
                port,
                rtcpPort,
                localRtcpPort: rtpTransport.rtcpTuple ? rtpTransport.rtcpTuple.localPort : undefined,
                rtpCapabilities,
                rtpParameters: rtpConsumer.rtpParameters,
                preferredPayloadType: routerCodec.payloadType
            };
        }
        
        ffmpegInput.fileName = Date.now().toString();
        peer._process = new FFmpeg(ffmpegInput, consumers);
    }


  


  and the ffmpeg class is :

  


  class FFmpeg {
    constructor(rtpParameters, consumers) {
        this._rtpParameters = rtpParameters;
        this._consumers = consumers;
        this._process = undefined;
        this._createProcess();
    }
    _createProcess() {
        this._process = child_process.spawn('ffmpeg', this._commandArgs);
        consumers.forEach((consumer) =>
        {
            consumer.resume();
        });
    }
get _commandArgs() {
        let commandArgs = [
            '-loglevel',
            'debug',
            '-protocol_whitelist',
            'file,crypto,pipe,udp,rtp',
            '-fflags',
            '+genpts',
            '-i',
            '/recording/input-h264.sdp', //path to sdp file has full path this is sample
            '-map',            // video
            '0:v:0',
            '-c:v',
            'copy',
            '-map',            //audio
            '0:a:0',
            '-strict',
            '-2',
            '-c:a',
            'copy',
            '-f',
            'webm',
            '-flags',
            '+global_header',
            '-y',
            `/files/${this._rtpParameters.fileName}.webm`
        ]);
        return commandArgs;
    }
}



  


  Sdp file :

  


  v=0
o=- 0 0 IN IP4 127.0.0.1
s=FFmpeg
c=IN IP4 127.0.0.1
t=0 0
m=video 8996 RTP/AVPF 101
a=rtcp:8997
a=rtpmap:101 VP8/90000
a=fmtp:101 level-asymmetry-allowed=1
m=audio 8994 RTP/AVPF 100
a=rtcp:8995
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10;useinbandfec=1


  


  Now, I am getting a codec parameter not found for stream 0 error.

  


  createProcess() [sdpString:v=0
            o=- 0 0 IN IP4 127.0.0.1
            s=FFmpeg
            c=IN IP4 127.0.0.1
            t=0 0
            m=video 8996 RTP/AVP 101
            a=rtpmap:101 VP8/90000
            a=sendonly
            m=audio 8994 RTP/AVP 100
            a=rtpmap:100 opus/48000/2
            a=sendonly
            ]
commandArgs:[ '-analyzeduration',
  '2147483647',
  '-probesize',
  '2147483647',
  '-loglevel',
  'debug',
  '-protocol_whitelist',
  'file,crypto,pipe,udp,rtp',
  '-fflags',
  '+genpts',
  '-i',
  '/recording/input-h264.sdp',
  '-map',
  '0:v:0',
  '-c:v',
  'copy',
  '-map',
  '0:a:0',
  '-strict',
  '-2',
  '-c:a',
  'copy',
  '-f',
  'webm',
  '-flags',
  '+global_header',
  '-y',
  '/files/1623939179824.webm',
  [length]: 28 ]
ffmpeg::process::data(err) [data:ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
]
ffmpeg::process::data(err) [data:  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
]
ffmpeg::process::data(err) [data:  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
]
ffmpeg::process::data(err) [data:  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Splitting the commandline.
Reading option '-analyzeduration' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'analyzeduration' with argument '2147483647'.
Reading option '-probesize' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'probesize' with argument '2147483647'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-protocol_whitelist' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'protocol_whitelist' with argument 'file,crypto,pipe,udp,rtp'.
Reading option '-fflags' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'fflags' with argument '+genpts'.
Reading option '-i' ... matched as input url with argument '/recording/input-h264.sdp'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:v:0'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ...]
ffmpeg::process::data(err) [data: matched as option 'map' (set input stream mapping) with argument '0:a:0'.
Reading option '-strict' ...]
ffmpeg::process::data(err) [data:Routing option strict to both codec and muxer layer
 matched as AVOption 'strict' with argument '-2'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm'.
Reading option '-flags' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'flags' with argument '+global_header'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '/files/1623939179824.webm' ... matched as output url.
Finished splitting the commandline.
]
ffmpeg::process::data(err) [data:Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url /recording/input-h264.sdp.
Successfully parsed a group of options.
Opening an input file: /recording/input-h264.sdp.
]
ffmpeg::process::data(err) [data:[NULL @ 0x55b7141c1a80] Opening '/recording/input-h264.sdp' for reading
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] Format sdp probed with size=2048 and score=50
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] video codec set to: vp8
[sdp @ 0x55b7141c1a80] audio codec set to: opus
[sdp @ 0x55b7141c1a80] audio samplerate set to: 48000
[sdp @ 0x55b7141c1a80] audio channels set to: 2
]
ffmpeg::process::data(err) [data:[udp @ 0x55b7141c4d40] end receive buffer size reported is 131072
[udp @ 0x55b7141cac00] end receive buffer size reported is 131072
[sdp @ 0x55b7141c1a80] setting jitter buffer size to 500
]
ffmpeg::process::data(err) [data:[udp @ 0x55b7141c5d40] end receive buffer size reported is 131072
]
ffmpeg::process::data(err) [data:[udp @ 0x55b7141c5e00] end receive buffer size reported is 131072
[sdp @ 0x55b7141c1a80] setting jitter buffer size to 500
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] Before avformat_find_stream_info() pos: 262 bytes read:262 seeks:0 nb_streams:2
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] Could not find codec parameters for stream 0 (Video: vp8, 1 reference frame, yuv420p): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] After avformat_find_stream_info() pos: 262 bytes read:262 seeks:0 frames:0
Input #0, sdp, from '/recording/input-h264.sdp':
  Metadata:
    title           : FFmpeg
  Duration: N/A, bitrate: N/A
    Stream #0:0, 0, 1/90000: Video: vp8, 1 reference frame, yuv420p, 90k tbr, 90k tbn, 90k tbc
    Stream #0:1, 0, 1/48000: Audio: opus, 48000 Hz, stereo, fltp
Successfully opened the file.
Parsing a group of options: output url /files/1623939179824.webm.
Applying option map (set input stream mapping) with argument 0:v:0.
Applying option c:v (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0:a:0.
]
ffmpeg::process::data(err) [data:Applying option c:a (codec name) with argument copy.
Applying option f (force format) with argument webm.
Successfully parsed a group of options.
Opening an output file: /files/1623939179824.webm.
]
ffmpeg::process::data(err) [data:[file @ 0x55b714243880] Setting default whitelist 'file,crypto'
]
ffmpeg::process::data(err) [data:Successfully opened the file.
]
ffmpeg::process::data(err) [data:[webm @ 0x55b71423e100] dimensions not set
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
    Last message repeated 1 times
[AVIOContext @ 0x55b714243b00] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 0x55b7141cacc0] Statistics: 262 bytes read, 0 seeks
]
ffmpeg::process::close


  


  I have been at it for days, I don't even know how to debug this issue. I tried using vlc's stream option with the url of server to check if the transport was working but it doesn't detect anything on localhost at that port.
  
If anyone has any ideas about the issue or ways to debug it, do tell me..

  


• A pragmatic strategy to merge multiple video files

  19 juin 2021, par saurav

  I currently am working on recording a multiparty video conference which supports up to 6 participants. I am recording the conference using a media server and storing audio/video streams individually for every participant.

  


  Next, I need to merge those individual recordings into a single video file and upload it to a cloud storage like aws s3. For this I am considering 2 options, either Gstreamer or FFMPEG. I am leaning towards FFMPEG as I have used FFMPEG previously. I currently am playing with FFMPEG things like the hstack and vstack filters etc.

  


  Here is the FFMPEG command I recently used to join 2 webm videos of 2 mins 40sec and 1min 40sec to create a mp4 video file for upload. Both the videos are 1280x720 in this case but I have included the scale part because in real life scenario different participants joining with different cameras produces video files of different resolution which is a problem for the hstack/vstack filter. Therefore, to make the video resolutions of all participant consistent, I have included the scale property.

  


  ffmpeg -i 1.webm -i 2.webm -filter_complex "[0:v]scale=1280:720,setsar=1[l];[1:v]scale=1280:720,setsar=1[r];[l][r]hstack;[0][1]amix" output-1280x720.mp4


  


  Currently I am facing 2 issues with this command.

  


  


  1. The output mp4 file is very big, in this case 140Mb (approx) for a less than 3 minutes video.

     


  


  2. How do I add delay to any video before starting to merge ?
     
Currently the videos are going out of sync if all the participants don't join at the same time which is highly unlikely to happen in a real world scenario.

     


  


  


  Any pointer in the right direction will be highly appreciated.

  


  Here is a log sample from FFmpeg (or see the full log link) :

  


  ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, matroska,webm, from '3.webm':
  Metadata:
    title           : FFmpeg
    ENCODER         : Lavf58.29.100
  Duration: 00:01:39.63, start: 0.000000, bitrate: 707 kb/s
    Stream #0:0: Video: vp8, yuv420p(tv, bt470bg/unknown/unknown, progressive), 1280x720, SAR 1:1 DAR 16:9, 1k tbr, 1k tbn, 1k tbc (default)
    Metadata:
      DURATION        : 00:01:39.618000000
    Stream #0:1: Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      DURATION        : 00:01:39.629000000
Input #1, matroska,webm, from '4.webm':
  Metadata:
    title           : FFmpeg
    ENCODER         : Lavf58.29.100
  Duration: 00:02:39.07, start: 0.000000, bitrate: 708 kb/s
    Stream #1:0: Video: vp8, yuv420p(tv, bt470bg/unknown/unknown, progressive), 1280x720, SAR 1:1 DAR 16:9, 1k tbr, 1k tbn, 1k tbc (default)
    Metadata:
      DURATION        : 00:02:39.050000000
    Stream #1:1: Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      DURATION        : 00:02:39.068000000
Stream mapping:
  Stream #0:0 (vp8) -> scale
  Stream #0:1 (opus) -> amix:input0
  Stream #1:0 (vp8) -> scale
  Stream #1:1 (opus) -> amix:input1
  hstack -> Stream #0:0 (libx264)
  amix -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 0x562b4842a500] using SAR=1/1
[libx264 @ 0x562b4842a500] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x562b4842a500] profile High, level 6.1
[libx264 @ 0x562b4842a500] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output-new.mp4':
  Metadata:
    title           : FFmpeg
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 2560x720 [SAR 1:1 DAR 32:9], q=-1--1, 1k fps, 16k tbn, 1k tbc (default)
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      encoder         : Lavc58.54.100 aac

frame=  129 fps=0.0 q=33.0 size=       0kB time=00:00:00.23 bitrate=   1.6kbits/s dup=123 drop=0 speed=0.44x    
frame=  257 fps=228 q=33.0 size=       0kB time=00:00:00.51 bitrate=   0.8kbits/s dup=243 drop=0 speed=0.455x    
frame=  379 fps=224 q=33.0 size=     256kB time=00:00:00.73 bitrate=2855.1kbits/s dup=358 drop=0 speed=0.434x    
frame=  497 fps=222 q=33.0 size=     256kB time=00:00:00.86 bitrate=2431.5kbits/s dup=469 drop=0 speed=0.386x    
 
...
More than 1000 frames duplicated
...
  
frame=158751 fps=196 q=33.0 size=  134656kB time=00:02:39.00 bitrate=6937.4kbits/s dup=151385 drop=0 speed=0.196x    
frame=158851 fps=196 q=33.0 size=  134912kB time=00:02:39.00 bitrate=6950.6kbits/s dup=151482 drop=0 speed=0.196x    
frame=158983 fps=196 q=33.0 size=  134912kB time=00:02:39.00 bitrate=6950.6kbits/s dup=151610 drop=0 speed=0.196x    
frame=159081 fps=196 q=-1.0 Lsize=  137197kB time=00:02:39.07 bitrate=7065.2kbits/s dup=151706 drop=0 speed=0.196x    

video:132693kB audio:2494kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.486001%

[libx264 @ 0x562b4842a500] frame I:637   Avg QP:17.73  size:123895
[libx264 @ 0x562b4842a500] frame P:40088 Avg QP:19.73  size:  1134
[libx264 @ 0x562b4842a500] frame B:118356 Avg QP:27.54  size:    97
[libx264 @ 0x562b4842a500] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%
[libx264 @ 0x562b4842a500] mb I  I16..4: 11.1% 67.3% 21.6%
[libx264 @ 0x562b4842a500] mb P  I16..4:  0.1%  0.1%  0.0%  P16..4:  2.6%  0.4%  0.3%  0.0%  0.0%    skip:96.5%
[libx264 @ 0x562b4842a500] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.7%  0.0%  0.0%  direct: 0.0%  skip:99.3%  L0:38.7% L1:61.3% BI: 0.0%
[libx264 @ 0x562b4842a500] 8x8 transform intra:66.8% inter:71.4%
[libx264 @ 0x562b4842a500] coded y,uvDC,uvAC intra: 81.8% 89.5% 72.3% inter: 0.2% 0.4% 0.0%
[libx264 @ 0x562b4842a500] i16 v,h,dc,p: 25% 21% 17% 37%
[libx264 @ 0x562b4842a500] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 22% 12%  4%  5%  6%  6%  6%  6%
[libx264 @ 0x562b4842a500] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 24%  6%  4%  5%  5%  6%  4%  4%
[libx264 @ 0x562b4842a500] i8c dc,h,v,p: 42% 24% 26%  9%
[libx264 @ 0x562b4842a500] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x562b4842a500] ref P L0: 82.4% 11.5%  5.3%  0.8%
[libx264 @ 0x562b4842a500] ref B L0: 83.0% 16.9%  0.1%
[libx264 @ 0x562b4842a500] ref B L1: 94.9%  5.1%
[libx264 @ 0x562b4842a500] kb/s:6833.11
[aac @ 0x562b4842b540] Qavg: 239.393


  


• How can several .ts files be converted to one (non-fragmented) .mp4 file using ffmpeg ?

  23 juin 2021, par verified_tinker

  Problem Description

  


  The video player I'm using doesn't support .ts files, but it does play .mp4 files, so I'd like to use ffmpeg to convert my .ts files to .mp4 files.

  


  Goal Solution

  


  Use ffmpeg to download several .ts segments and transcode them into an .mp4 file that I'd load into my video player. Rinse and repeat. It'd add a delay of 10-20 seconds, but that's fine.

  


  The trick is to do the transcoding fast enough so, by the time one .mp4 file is finished playing, the next one is available ; in other words, the transcoding should take less than a second per second of footage. Ideally, it would take significantly less than that, to account for varying processing power on different devices.

  


  To clarify, when I say .mp4, I don't mean fragmented .mp4 files.

  


  ---

  


  If transcoding to some other format is faster, that might be fine, too. For example, I know the .mkv format is playable. I'm still exploring the full range of available formats.

  


  What I've Tried

  


  I tested transcoding 1 .ts file into an .mp4 file, and unfortunately it took about 6 seconds when the file was about 4 seconds long. That was with ffmpeg-wasm. I was hoping the JavaScript bridge might be slowing it down and that batching several .ts segments in 1 call might help.

  


  Command

  


  ffmpeg -i test.ts test.mp4


  


  Log

  


  [info] run FS.writeFile test.ts <349304 bytes binary file>
log.js:15 [info] run ffmpeg command: -i test.ts test.mp4
log.js:15 [fferr] ffmpeg version v0.9.0-2-gb11e5c1495 Copyright (c) 2000-2020 the FFmpeg developers
log.js:15 [fferr]   built with emcc (Emscripten gcc/clang-like replacement) 2.0.8 (d059fd603d0b45b584f634dc2365bc9e9a6ec1dd)
log.js:15 [fferr]   configuration: --target-os=none --arch=x86_32 --enable-cross-compile --disable-x86asm --disable-inline-asm --disable-stripping --disable-programs --disable-doc --disable-debug --disable-runtime-cpudetect --disable-autodetect --extra-cflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1' --extra-cxxflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1' --extra-ldflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1 -L/src/build/lib' --pkg-config-flags=--static --nm=llvm-nm --ar=emar --ranlib=emranlib --cc=emcc --cxx=em++ --objcc=emcc --dep-cc=emcc --enable-gpl --enable-nonfree --enable-zlib --enable-libx264 --enable-libx265 --enable-libvpx --enable-libwavpack --enable-libmp3lame --enable-libfdk-aac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-libopus --enable-libwebp --enable-libass --enable-libfribidi
log.js:15 [fferr]   libavutil      56. 51.100 / 56. 51.100
log.js:15 [fferr]   libavcodec     58. 91.100 / 58. 91.100
log.js:15 [fferr]   libavformat    58. 45.100 / 58. 45.100
log.js:15 [fferr]   libavdevice    58. 10.100 / 58. 10.100
log.js:15 [fferr]   libavfilter     7. 85.100 /  7. 85.100
log.js:15 [fferr]   libswscale      5.  7.100 /  5.  7.100
log.js:15 [fferr]   libswresample   3.  7.100 /  3.  7.100
log.js:15 [fferr]   libpostproc    55.  7.100 / 55.  7.100
log.js:15 [fferr] Input #0, mpegts, from 'test.ts':
log.js:15 [fferr]   Duration: 00:00:04.00, start: 10.006000, bitrate: 698 kb/s
log.js:15 [fferr]   Program 1 
log.js:15 [fferr]     Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720, 23.98 tbr, 90k tbn, 1411200000.00 tbc
log.js:15 [fferr]     Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 130 kb/s
log.js:15 [fferr] Stream mapping:
log.js:15 [fferr]   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
log.js:15 [fferr]   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
log.js:15 [fferr] [libx264 @ 0x1f5f080] using cpu capabilities: none!
log.js:15 [fferr] [libx264 @ 0x1f5f080] profile High, level 3.1, 4:2:0, 8-bit
log.js:15 [fferr] [libx264 @ 0x1f5f080] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
log.js:15 [fferr] Output #0, mp4, to 'test.mp4':
log.js:15 [fferr]   Metadata:
log.js:15 [fferr]     encoder         : Lavf58.45.100
log.js:15 [fferr]     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720, q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
log.js:15 [fferr]     Metadata:
log.js:15 [fferr]       encoder         : Lavc58.91.100 libx264
log.js:15 [fferr]     Side data:
log.js:15 [fferr]       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
log.js:15 [fferr]     Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
log.js:15 [fferr]     Metadata:
log.js:15 [fferr]       encoder         : Lavc58.91.100 aac
log.js:15 [fferr] frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:00.38 bitrate=   1.0kbits/s dup=1 drop=0 speed=0.521x    
log.js:15 [fferr] frame=   47 fps= 27 q=0.0 size=       0kB time=00:00:02.09 bitrate=   0.2kbits/s dup=1 drop=0 speed=1.22x    
log.js:15 [fferr] frame=   57 fps= 25 q=28.0 size=       0kB time=00:00:02.51 bitrate=   0.2kbits/s dup=1 drop=0 speed=1.13x    
log.js:15 [fferr] frame=   67 fps= 24 q=28.0 size=       0kB time=00:00:02.96 bitrate=   0.1kbits/s dup=1 drop=0 speed=1.08x    
log.js:15 [fferr] frame=   77 fps= 23 q=28.0 size=       0kB time=00:00:03.37 bitrate=   0.1kbits/s dup=1 drop=0 speed=1.03x    
log.js:15 [fferr] frame=   89 fps= 23 q=28.0 size=       0kB time=00:00:03.96 bitrate=   0.1kbits/s dup=1 drop=0 speed=1.04x    
log.js:15 [fferr] frame=   96 fps= 15 q=-1.0 Lsize=      60kB time=00:00:04.01 bitrate= 122.8kbits/s dup=1 drop=0 speed=0.646x    
log.js:15 [fferr] video:55kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 7.249582%
log.js:15 [fferr] [libx264 @ 0x1f5f080] frame I:1     Avg QP:17.20  size: 31521
log.js:15 [fferr] [libx264 @ 0x1f5f080] frame P:24    Avg QP:16.17  size:   735
log.js:15 [fferr] [libx264 @ 0x1f5f080] frame B:71    Avg QP:27.68  size:    91
log.js:15 [fferr] [libx264 @ 0x1f5f080] consecutive B-frames:  1.0%  0.0%  3.1% 95.8%
log.js:15 [fferr] [libx264 @ 0x1f5f080] mb I  I16..4: 26.2% 56.4% 17.4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] mb P  I16..4:  0.1%  0.2%  0.0%  P16..4:  3.5%  0.4%  0.2%  0.0%  0.0%    skip:95.4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.6%  0.0%  0.0%  direct: 0.0%  skip:98.3%  L0:31.0% L1:69.0% BI: 0.0%
log.js:15 [fferr] [libx264 @ 0x1f5f080] 8x8 transform intra:56.5% inter:59.4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] coded y,uvDC,uvAC intra: 17.4% 15.4% 7.5% inter: 0.2% 0.4% 0.0%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i16 v,h,dc,p: 29% 63%  1%  7%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 51% 31% 14%  0%  2%  1%  1%  0%  1%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 45% 11%  2%  3%  2%  4%  2%  4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i8c dc,h,v,p: 76% 17%  6%  1%
log.js:15 [fferr] [libx264 @ 0x1f5f080] Weighted P-Frames: Y:0.0% UV:0.0%
log.js:15 [fferr] [libx264 @ 0x1f5f080] ref P L0: 89.5%  1.6%  6.7%  2.3%
log.js:15 [fferr] [libx264 @ 0x1f5f080] ref B L0: 38.5% 60.9%  0.6%
log.js:15 [fferr] [libx264 @ 0x1f5f080] ref B L1: 97.7%  2.3%
log.js:15 [fferr] [libx264 @ 0x1f5f080] kb/s:111.08
log.js:15 [fferr] [aac @ 0x1f48100] Qavg: 65536.000
log.js:15 [ffout] FFMPEG_END
log.js:15 [info] run FS.readFile test.mp4
(index):38 Time elapsed: 6345 (This one's my own code.)
[info] run FS.readFile test.mp4


  


  (I'm running this on the browser. For the purposes of this question, consider the HTML player unavailable for use.)

  


  ---

  


  I also tested feeding the HLS live-stream URL as input to ffmpeg and outputting a single .mp4 file, but I couldn't play it until I ended the live-stream and ffmpeg finished downloading it.

  


  This one I ran on the (Windows) PC ; not the browser.

  


  Command

  


  ffmpeg -i https://stream.mux.com/lngMYGqNpHhYg2ZXqpH8WODVGzuenaZuhckdyunGpzU.m3u8 -acodec copy -bsf:a aac_adtstoasc -vcodec copy out.mp4


  


  Log

  


  The log is too large and StackOverflow won't let me paste it here, so I uploaded it to PasteBin : https://pastebin.com/FqvPQ1DZ