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• content generation for mpeg dash for Dash.if player

  9 mai 2014, par Pavan K

  Could anyone please tell me how to encode content to be player with the dash.if player on the chrome browser

  https://github.com/Dash-Industry-Forum/dash.js — This is the player in question.

  I tried mp4box and ffmpeg to create content but The samples pointed in the examples work well but I cant make my own videos to work with the dash player.

  I used all possible options on the mp4box with no luck [ from http://gpac.wp.mines-telecom.fr/2011/02/02/mp4box-fragmentation-segmentation-splitting-and-interleaving/ ]

• avcodec/ccaption_dec : Make real-time latency configurable

  19 juin 2021, par Pavel Koshevoy

  avcodec/ccaption_dec : Make real-time latency configurable
  Un-hardcode the 200ms minimum latency between emitting subtitle events
  
  so that those that wish to receive a subtitle event for every screen
  
  change could do so.
  The problem with delaying realtime output by any amount is that it is
  
  unknown when the next byte pair that would trigger output will happen.
  
  It may be within 200ms, or it may be several seconds later — that's
  
  not realtime at all.
  

  • [DH] libavcodec/ccaption_dec.c
  • [DH] libavcodec/version.h

• using ffmpeg to convert a mkv or mp4 suitable for a DVD player that supports MPEG-4 / DivX [closed]

  17 juillet 2022, par Neil Telford

  I got a DVD Player with USB support. It is a recent player (DVD-225), but the documentation is sparse, but it does claim MPEG-4 and DivX support.

  


  Now, I have got certain AVI files to play via USB, but everything else fails. I looked at the metadata of an AVI file that worked via ffprobe, and got the following :

  


  Metadata:
    encoder         : Lavf58.17.101   Duration: 00:58:30.94, start: 0.000000, bitrate: 1336 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile) (xvid / 0x64697678), yuv420p, 640x290 [SAR 1:1 DAR 64:29], 1196 kb/s, 23.98 fps, 23.98 tbr,
23.98 tbn, 23.98 tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, fltp, 128 kb/s


  


  Now, I figured that if I can replicate the above, I can convert most things to play via USB, even if it isn't the most up to date codecs.

  


  I've tried various combinations, but they all fail. The closest I got was by using the following shell script :

  


  for i in *.avi; do ffmpeg -i "$i" -c:v mpeg4 -vtag divx -qscale:v 3 -c:a libmp3lame -qscale:a 4 "_${i%.*}.avi"; done


  


  This has a strange result that it will play the audio track, but not the video track. The metadata I got from this was :

  


  Metadata:
    encoder         : Lavf58.45.100
  Duration: 00:58:07.99, start: 0.000000, bitrate: 3026 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile) (divx / 0x78766964), yuv420p, 1280x720 [SAR 3:4 DAR 4:3], 2901 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 24k tbc
    Metadata:
      title           : ******************
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, fltp, 109 kb/s
    Metadata:
      title           : ******************


  


  Does anyone know where I am going wrong with this ? I've converted AVI, MKV and MP4 files, and while they work on my computer, the DVD player seems to be very picky.

  


  Any suggestions ?

  


  Thanks
Neil