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• Video Streaming Media Source Segments - This SourceBuffer has been removed from the parent media source

  16 septembre 2021, par Swifted

  I have a problem with my .mp4 file segmented with MP4Box and the following command :

  


  MP4Box -dash 4000 -rap -segment-name segment_ Trailler.mp4


  


  This generates my files "segment_1.m4s", "segment_2.m4s", ...
as well as video_dash.mpd and segment_init.mp4

  


  Then, on the Javascript side, I use MediaSource and I used the following tutorial :

  


  https://eyevinntechnology.medium.com/how-to-build-your-own-streaming-video-html-player-6ee85d4d078a

  


  This tutorial works very well for me, except when I try to use my fragmented .mp4 video. The following error comes out :

  


  

  


  Can you tell me or point me to why this error comes up ?

  


  Thanks in advance

  


• How to start an FFmpeg process, create a pipe and write data from the parent process ?

  3 mai 2021, par xlxs

  My code is based on https://stackoverflow.com/a/32279430/5941827.

  


  I run FFmpeg with the following params :

  


  std::stringstream sstm;
sstm << "ffmpeg -loglevel error -y -f rawvideo -vcodec rawvideo -s " << std::to_string(width) << "x" << std::to_string(height) //
        << " -pix_fmt rgb24 -framerate " << std::to_string(fps) << " -i - -c:v libx264 -preset " << getPreset(encodeSpeed) << //
        " -crf " << std::to_string(crf) << " -shortest " << path;


  


  (the variables are initialized in a class constructor correctly)

  


  Then I open the pipe with pPipe = popen(sstm.str().c_str(), "w").The problem is after I fwrite to it and calling fclose, based on the contents I write sometimes less or more bytes reach FFmpeg, and I get

  


  [rawvideo @ 000000000010c3df] Invalid buffer size, packet size 196606 < expected frame_size 196608
Error while decoding stream #0:0: Invalid argument


  


  The saved output video usually has one frame more or less than the expected.
I have checked the array I'm sending trough the pipe with fwrite and it's size is correct.
It appears that based on the data I send some bytes don't get there, or more bytes than I send go through the pipe.

  


  I have also tried two different FFmpeg versions, but with the same error message.

  


• How to batch "touch" files in subfolder with data from parent folder

  12 août 2019, par Constantine Grigorakis

  I have a folder named "Video" on my Desktop and inside that folder are a bunch of .MTS video files. (00000.MTS, 00001.MTS, 00002.MTS etc...)

  There is also a subfolder "H.265" (Video > H.265) which contains files (00000.mp4, 00001.mp4, 00002.mp4 etc...) which were made by converting the files from the parent folder. The problem is they don’t contain the correct date created metadata.

  I want to use the command

  touch -r 00000.MTS 00000.mp4
  
  touch -r 00001.MTS 00001.mp4
  
  ...
  
  touch -r 000mn.MTS 000mn.mp4

  to copy the date from the MTS to the mp4 file.

  Is there a way I could write a for loop or something to do this for every single file ?

  I am using MacOS Mojave.