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• FFMPEG mp4 videos not suddenly stops playing on Browsers

  14 janvier 2020, par Harley Lapuz

  I have been struggling with this issue in regards to playing my converted mp4 videos using FFMPEG into an html 5 video player, I basically just use a single video player and just replace the source when the video ends.

  What happens is that a MediaError occurs randomly with different videos saying :

  PIPELINE_ERROR_DECODE: Failed to send audio packet for decoding

  or

  PIPELINE_ERROR_DECODE: audio decode error

  Videos have no issues on Safari, Internet Explorer, and Firefox. But this error shows up randomly on Opera and Google Chrome.

  I am using Laravel [Laravel FFMpeg][1] to convert the videos, please see my conversion code below :

  $bitrateFormat = (new FFMpeg\Format\Video\X264('aac', 'libx264'))->setKiloBitrate(1500);
  
  
  
  $converted_video = FFMpeg::fromDisk('videos')
  
      ->open($this->video_id)
  
      ->addFilter(['-pix_fmt', 'yuv420p'], ['-movflags', '+faststart'])
  
      ->export()
  
      ->inFormat($bitrateFormat)
  
      ->toDisk('do_spaces_video')
  
      ->save($this->video_id);

  Any help would be appreciated guys, thanks in advance !

  EDIT - Added Media Internals Error

  00:04:02.892    for_suspended_start false
  
  00:04:02.892    pipeline_buffering_state    BUFFERING_HAVE_ENOUGH
  
  00:04:33.919    error   Failed to send audio packet for decoding: timestamp=272341333 duration=21333 size=346 side_data_size=0 is_key_frame=1 encrypted=0 discard_padding (us)=(0, 0)
  
  00:04:33.919    error   audio decode error
  
  00:04:33.943    error   audio error during playing, status: PIPELINE_ERROR_DECODE
  
  00:04:33.943    pipeline_error  PIPELINE_ERROR_DECODE
  
  00:04:33.944    pipeline_state  kStopping
  
  00:04:33.945    pipeline_state  kStopped
  
  00:04:33.950    event   PAUSE

• VLC - Transcoding a 4k Picture to a Transport Stream

  20 janvier 2020, par gdogg371

  After a lot of crying, stamping my feet and pulling my hair out, I have now managed to transcode my 4k capture card into an RTP MPEG2 transport stream using VLC, as per the below :

  vlc dshow:// :dshow-vdev="Video (00 Pro Capture HDMI 4K+)" :dshow-adev="Audio (2- 00 Pro Capture HDMI 4K+)" :dshow-threads=8 :dshow-aspect-ratio=16\:9 :dshow-size="2160x1080" :dshow-pixel_format=NV12 :dshow-tune=film :dshow-preset=veryslow :dshow-vcodec=hevc_nvenc :dshow-fps=50 :dshow-crf=0 :dshow-acodec=mp4a :dshow-stereo-mode=5 :dshow-force-surround-sound=0 :dshow-ab=128 :dshow-samplerate=44100 :no-dshow-config :live-caching=100 :sout=#transcode{venc=ffmpeg,vcodec=mp2v,threads=8,aspect=16:9,width=2160,height=1080,fps=50,aenc=ffmpeg,acodec=a52,ab=1500,channels=6,samplerate=48000,soverlay}:rtp{dst=192.168.1.15,port=8554,mux=ts}

  My remaining issue though is, that I cannot get a 4k picture to transcode cleanly. I get horrendous stutter of the picture if I try and 2160x1080 at 50 fps is the best I have been able to achieve.

  The Magewell 4k card I have been using runs natively at 3840x2160 at 50fps, outputting a raw video signal. Is there some kind of built in limitation of MPEG2 where it cannot handle a 4k signal that I am not aware of ?

  Can anyone suggests some amendments to the above, so as to process a 4k signal properly ?

  Thanks

• ffmpeg for windows : error when concatenating videos

  20 août 2019, par Ginso

  i have extracted a few clips from a video file of resolution 1920x816 called ca0.mp4...ca9.mp4 using the command

  ffmpeg -i ./ca.mkv -ss 00:53:24 -t 00:01:30 ca0.mp4

  Then i created a black video using

  ffmpeg -f lavfi -i color=black:s=1920x816:r=24000/1001 -f lavfi -i anullsrc -ar 48000 -ac 2 -t 00:00:02 empty.mp4

  now i want to concencate the clips with the black video between them. Therefore i created a file list.txt :

  file 'ca0.mp4'
  
  file 'empty.mp4'
  
  file 'ca1.mp4'
  
  file 'empty.mp4'
  
  file 'ca2.mp4'
  
  file 'empty.mp4'
  
  file 'ca3.mp4'
  
  file 'empty.mp4'
  
  file 'ca4.mp4'
  
  file 'empty.mp4'
  
  file 'ca5.mp4'
  
  file 'empty.mp4'
  
  file 'ca6.mp4'
  
  file 'empty.mp4'
  
  file 'ca7.mp4'
  
  file 'empty.mp4'
  
  file 'ca8.mp4'
  
  file 'empty.mp4'
  
  file 'ca9.mp4'

  and tried the command

  ffmpeg -f concat -i list.txt -c:v qtrle -c:a copy ca.mp4

  however, i get the following output :

  ffmpeg version N-89940-gb1af0e23a3 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
  
    libavutil      56.  7.100 / 56.  7.100
  
    libavcodec     58.  9.100 / 58.  9.100
  
    libavformat    58.  7.100 / 58.  7.100
  
    libavdevice    58.  0.101 / 58.  0.101
  
    libavfilter     7. 11.101 /  7. 11.101
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 000001e2cd155900] Auto-inserting h264_mp4toannexb bitstream filter
  
  Guessed Channel Layout for Input Stream #0.1 : 5.1
  
  Input #0, concat, from 'list.txt':
  
    Duration: N/A, start: -0.021333, bitrate: 1894 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x816 [SAR 1:1 DAR 40:17], 1500 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(ger): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 394 kb/s
  
      Metadata:
  
        handler_name    : SoundHandler
  
      Stream #0:2(eng): Data: bin_data (text / 0x74786574), 0 kb/s
  
      Metadata:
  
        handler_name    : SubtitleHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> qtrle (native))
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 000001e2cd213080] Could not find tag for codec qtrle in stream #0, codec not currently supported in container
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Error initializing output stream 0:0 --
  
  Conversion failed!

  can anyone tell me, what i did wrong ?