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• ffmpeg stream rejected by youtube because it's too slow

  15 septembre 2019, par DeadlyBacon

  I have an app that sends WebM video to a socket in my server, the socket then executes ffmpeg to transform the video to flv and send it to a youtube rtmp ingester.

  Thing is, youtube rejects the stream, saying that the broadcast status is incorrect, no matter what I do.

  In my naivette I initially tried to stream 1080p and 720p, that failed, so I went down, assuming that that might help me with the bitrate issue... It did not.

  The error that Youtube gives me is in spanish but it basically says that the stream is too slow and I should lower resolution or bitrate(I’m already @ 240p and it’s not working).

  Edit : Here’s the error, translated :

  Main broadcast :
  YouTube is not receiving enough video to guarantee a fluid broadcast. Buffering will occur.

  Main Broadcast : We are not receiving video data at a fast enough speed. Your audience may experience buffering. Make sure that your connection is fast enough o consider using a lower bitrate.

  Here is my call to ffmpeg thus far (language is node.js if that matters.) :

  const ffmpeg = child_process.spawn('ffmpeg', [
  
  
  
      '-f', 'lavfi', '-i', 'anullsrc',
  
  
  
      //    '-re', // I was told i shouldnt use this parameter. i dont know, honestly.
  
  
  
  
  
  
  
      // FFmpeg will read input video from STDIN
  
      '-i', '-',
  
  
  
      // Because we're using a generated audio source which never ends,
  
      // specify that we'll stop at end of other input.  Remove this line if you
  
      // send audio from the browser.
  
      '-shortest',
  
  
  
      '-vcodec', 'libx264',
  
  
  
      '-acodec', 'aac',
  
  
  
      //ffmpeg
  
      //-re -loop 1
  
      //-framerate 2 -i test1.jpg -i https://xxxxxxxxxxx:8443/live.ogg
  
      //-c:a aac
  
      //-s 2560x1440
  
      //-ab 128k -vcodec libx264 -pix_fmt yuv420p -maxrate 2048k -bufsize 2048k
  
      //'-framerate', '30',
  
      '-r', '24',
  
      //'-s', '2560x1440',
  
  
  
  
  
      '-force_key_frames','expr:gte(t\,n_forced/2)',
  
  
  
      '-preset', 'ultrafast',
  
      '-pix_fmt', 'yuv420p',
  
      '-s', '426x240',
  
      '-crf', '23',
  
      '-bf', '2',
  
      '-q:a', '1',
  
      '-ac', '2',
  
      '-ar','48000',
  
      '-use_editlist','0',
  
      '-movflags','+faststart',
  
      //  '-ab', '128k',
  
      '-g', '48',
  
  
  
      //'-minrate', '1500k',
  
      '-minrate', '1000k',
  
      '-maxrate', '2000k',
  
  
  
      '-bufsize', '2000k',/*
  
      '-g', '30',*/
  
      //'-keyint_min', '30',
  
      //'-t', '30',
  
  
  
      ////
  
      '-deadline', 'realtime',
  
      '-cpu-used','-16',
  
  
  
      '-tune', 'zerolatency',
  
  
  
      '-threads', '4',
  
  
  
      //-g 2 -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/xxxxxxxxxxxxx
  
  
  
  
  
      // FLV is the container format used in conjunction with RTMP
  
      '-f', 'flv',
  
  
  
  
  
  
  
      // The output RTMP URL.
  
      // For debugging, you could set this to a filename like 'test.flv', and play
  
      // the resulting file with VLC.  Please also read the security considerations
  
      // later on in this tutorial.
  
      rtmpUrl
  
  ]);

  Edit : input is fed via stdin whenever the socket receives data.

  In my completely uneducated opinion, the "-deadline realtime" & the "-tune zerolatency" parts seemed to help somewhat but not enough to get me streamin’.

  Here is some of the output of ffmpeg :

  FFmpeg STDERR: frame=   35 fps=3.1 q=23.0 size=     104kB time=00:00:08.44 bitrate= 100.4kbits/s dup=0 drop=3 speed=0.76x    
  
  FFmpeg STDERR: frame=   35 fps=3.0 q=23.0 size=     104kB time=00:00:08.44 bitrate= 100.4kbits/s dup=0 drop=3 speed=0.726x    
  
  FFmpeg STDERR: frame=   35 fps=2.9 q=23.0 size=     104kB time=00:00:08.44 bitrate= 100.4kbits/s dup=0 drop=3 speed=0.696x    
  
  FFmpeg STDERR: frame=   36 fps=2.8 q=23.0 size=     109kB time=00:00:09.45 bitrate=  94.6kbits/s dup=0 drop=3 speed=0.747x    
  
  FFmpeg STDERR: frame=   36 fps=2.7 q=23.0 size=     109kB time=00:00:09.45 bitrate=  94.6kbits/s dup=0 drop=3 speed=0.719x    
  
  FFmpeg STDERR: frame=   38 fps=2.8 q=23.0 size=     121kB time=00:00:11.45 bitrate=  86.7kbits/s dup=0 drop=3 speed=0.839x   

  This is extremely frustrating.

  Please, guys, any guidance is good. what is it that I should be maximizing or minimizing ? how do I do that ? I honestly do not care about everything else going to hell (for example the video freezing or being severely pixelated at times) I just care about being able to stream

  Thank you in advance for anything that might help me !

  UPDATE : I created a new broadcast, with variable bitrate, I broadcasted to it, it was at "status:optimal" for a few seconds then fps and speed went down and the stream went back to "status : incorrect"

• youtube-dl got a 3gp file, apparently it doesn't contain any video streams

  27 juillet 2018, par Albertinio

  I tried downloading a video with youtube-dl with 3gp format. When I try to play it on VLC or any other application it doesn’t play. This is the output I get when trying to download it again.

  youtube-dl https://youtu.be/lVFq__mrmlQ -f worst -v  
  
  [debug] System config: []  
  
  [debug] User config: []  
  
  [debug] Custom config: []  
  
  [debug] Command-line args: ['https://youtu.be/lVFq__mrmlQ', '-f', 'worst', '-v']  
  
  [debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8  
  
  [debug] youtube-dl version 2018.03.14  
  
  [debug] Python version 3.6.5 (CPython) - Linux-4.15.0-29-generic-x86_64-with-Ubuntu-18.04-bionic  
  
  [debug] exe versions: ffmpeg 3.4.2-2, ffprobe 3.4.2-2, phantomjs 2.1.1, rtmpdump 2.4  
  
  [debug] Proxy map: {}  
  
  [youtube] lVFq__mrmlQ: Downloading webpage  
  
  [youtube] lVFq__mrmlQ: Downloading video info webpage  
  
  [youtube] lVFq__mrmlQ: Extracting video information  
  
  [debug] Invoking downloader on 'https://r4---sn-h5q7dnee.googlevideo.com/videoplayback?signature=5432A7990BB3336616E21753F1D53171D09CBC31.B98E84CF0C51F39C613F53311128CD9E7A3872EA&c=WEB&lmt=1514133618343257&key=yt6&itag=17&fvip=3&mn=sn-h5q7dnee%2Csn-h5q7knes&mm=31%2C29&pl=24&mime=video%2F3gpp&id=o-AKWLZ7MpY1ip3PlxZJ7vXBY-jDqbVpUeI_Bls_o_g-GV&ipbits=0&requiressl=yes&ip=90.174.4.0&gir=yes&mt=1532653244&ms=au%2Crdu&dur=18470.684&initcwndbps=1011250&ei=S29aW5SjH4bIVseNkfgE&expire=1532674987&mv=m&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&clen=195336027&source=youtube&ratebypass=yes'  
  
  [download] Heroes of Might and Magic III - No Might 1v7 FFA (200%)-lVFq__mrmlQ.3gp has already been downloaded  
  
  [download] 100% of 186.29MiB  

  I tried converting it with ffmpeg, but I get the following message :

  ffmpeg -i  Heroes\ of\ Might\ and\ Magic\ III\ -\ No\ Might\ 1v7\ FFA\ \(200%\)-lVFq__mrmlQ.3gp Heroes\ of\ Might\ and\ Magic\ III\ -\ No\ Might\ 1v7\ FFA\ \(200%\)-lVFq__mrmlQ.mp4
  
  ffmpeg version 3.4.2-2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7 (Ubuntu 7.3.0-16ubuntu2)
  
    configuration: --prefix=/usr --extra-version=2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    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
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x562e75c728c0] Could not find codec parameters for stream 0 (Video: mpeg4 (mp4v / 0x7634706D), none, 221 kb/s): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Heroes of Might and Magic III - No Might 1v7 FFA (200%)-lVFq__mrmlQ.3gp':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2017-12-24T16:43:17.000000Z
  
    Duration: 05:07:50.68, bitrate: 84 kb/s
  
      Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D), none, 221 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-12-24T16:43:17.000000Z
  
        handler_name    : IsoMedia File Produced by Google, 5-11-2011
  
  Output #0, mp4, to 'Heroes of Might and Magic III - No Might 1v7 FFA (200%)-lVFq__mrmlQ.mp4':
  
  Output file #0 does not contain any stream

  With this information, I don’t know how to proceed. I already tried ffmpeg with the max analyzeduration and probesize and it still doesn’t work. Any ideas ?

• FFMpeg : Webcam capture not fast enough. Ffmpeg dies half way (Linux)

  19 août 2013, par user763410

  I am trying to capture webcam output in liux/ubuntu. I have a chico webcam (lenovo laptop). I am running inside a VMWARE virtual machine. The capture is not proceeding beyond 10 seconds. can you please help.

  The command I used is :

  $ ffmpeg -y  -f video4linux2 -r 20 -s 160x120 -i /dev/video0 -acodec libfaac -ab 128k  /tmp/web.avi

  The most important message I am getting is :

  [video4linux2,v4l2 @ 0x9e43fa0] The v4l2 frame is 46448 bytes, but 153600 bytes are expected

  Complete message from ffmpeg :

  ffmpeg version N-55159-gf118b41 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Aug 18 2013 09:09:13 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --enable-libass --prefix=/opt/ffmpeg --enable-debug --enable-libfreetype
  
    libavutil      52. 40.100 / 52. 40.100
  
    libavcodec     55. 19.100 / 55. 19.100
  
    libavformat    55. 12.102 / 55. 12.102
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 82.100 /  3. 82.100
  
    libswscale      2.  4.100 /  2.  4.100
  
    libswresample   0. 17.103 /  0. 17.103
  
  [video4linux2,v4l2 @ 0x9e43fa0] The V4L2 driver changed the video from 160x120 to 320x240
  
  [video4linux2,v4l2 @ 0x9e43fa0] The driver changed the time per frame from 1/20 to 1/15
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 6424.338678, bitrate: 18432 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 18432 kb/s, 15 fps, 15 tbr, 1000k tbn, 1000k tbc
  
  Codec AVOption ab (set bitrate (in bits/s)) specified for output file #0 (/tmp/web.avi) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
  
  Output #0, avi, to '/tmp/web.avi':
  
    Metadata:
  
      ISFT            : Lavf55.12.102
  
      Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240, q=2-31, 200 kb/s, 20 tbn, 20 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
  
  Press [q] to stop, [?] for help
  
  [video4linux2,v4l2 @ 0x9e43fa0] The v4l2 frame is 46448 bytes, but 153600 bytes are expected
  
  /dev/video0: Invalid data found when processing input
  
  frame=   29 fps= 14 q=3.5 Lsize=      87kB time=00:00:01.45 bitrate= 490.0kbits/s    
  
  video:80kB audio:0kB subtitle:0 global headers:0kB muxing overhead 7.760075%
  
  [video4linux2,v4l2 @ 0x9e43fa0] Some buffers are still owned by the caller on close.