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• avformat/mpegtsenc : use standard pids for m2ts

  11 novembre 2019, par Marton Balint

  avformat/mpegtsenc : use standard pids for m2ts
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/mpegts.h
  • [DH] libavformat/mpegtsenc.c

• Using FFmpeg or Similar to Normalize audio in a video to EBU R128 standard

  12 mai 2020, par MrNeedHelpPlease

  This is my first time here on stack overflow asking question.

  



  I am stuck and really struggling with this. I am trying to make some of my MXF video files to be EBU r128 standard for its audio.

  



  This means that it has to be -23 and not higher than 0.5.

  



  My current process

  



  Watch_folder > Encoding to MXF > Output_folder

  



  I need to makesure when its comes to output folder, those MXF files are EBU R128 Loudness compliant.

  



  What I have done so Far :

  



  FFMPEG :

  



  ffmpeg -i input.mxf -af loudnorm=I=-23:LRA=7:tp=-2:print_format=json -f null -

  



  got the result :

  



  Input Integrated : -15.1 LUFS
Input True Peak : +0.0 dBTP
Input LRA : 17.1 LU
Input Threshold : -26.2 LUFS

  



  Output Integrated : -17.1 LUFS
Output True Peak : -1.5 dBTP
Output LRA : 5.3 LU
Output Threshold : -27.6 LUFS

  



  Normalization Type : Dynamic
Target Offset : +1.1 LU

  



  then i did

  



  ffmpeg -i input.mxf  -af loudnorm=I=-23:LRA=7:tp=-2:measured_I=-15.1:measured_LRA=17.1:measured_tp=0:measured_thresh=-27.6:offset=1.1 -ar 48k -y output.mxf

  



  However, when i put it through the software Eff, it says that its not EBU compliant.

  



  *EDIT :
This also reduces the quality. for example ; my 6 Gb becomes 250 MB and you can tell the quality downgraded

  



  ffmpeg-normalize

  



  I did the following

  



  ffmpeg-normalize input.mxf -c:a pcm_s32le -ar 48000 -o output.mxf
but this gives me errors.

  



  if i do it without the output file type, i get a mkv which will not work for me. i need it to be mxf.

  


• Safari on Yosemite doesn't get total media duration from init file of video generated using MP4Box

  30 avril 2015, par sonam

  I am trying to play HTML5 video using MediaSource Extesion. I am generating dash fragmnets using MP4Box. I am creating init fragment and respective dash fragments.

  I am creating mediasource and adding init fragment to it. When this is done, all the browsers where media source extension is supported(chrome, firefox developer version, android chrome, windows 8 IE11), return correct media duration. But the same doesn’t work with safari on Yosemite, where spec says media source is supported. So on safari, media duration is updated as and when data fragments are appended to it progressively. How can I make it work in safari ? Is there something that is missing from init fragment and how to add it ?