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• avformat/dashdec : drop arbitrary DASH manifest size limit

  3 septembre 2020, par Jan Ekström

  avformat/dashdec : drop arbitrary DASH manifest size limit
  Currently the utilized AVBPrint API is internally limited to unsigned
  
  integers, so if we limit the file size as well as the amount to read
  
  to UINT_MAX - 1, we do not require additional limiting to be performed
  
  on the values.
  This change is based on the fact that initially the 8*1024 value added
  
  in 96d70694aea64616c68db8be306c159c73fb3980 was only for the case where
  
  the file size was not known. It was not a maximum file size limit.
  In 29121188983932f79aef8501652630d322a9974c this was reworked to be
  
  a maximum manifest file size limit, while its commit message appears
  
  to only note that it added support for larger manifest file sizes.
  This should enable various unfortunately large MPEG-DASH manifests,
  
  such as Youtube's multi-megabyte live stream archives to load up
  
  as well as bring back the original intent of the logic.
  

  • [DH] libavformat/dashdec.c

• avformat/matroskaenc : Fix writing of markers

  28 août 2023, par Steinar H. Gunderson

  avformat/matroskaenc : Fix writing of markers
  When the marker writing code was merged from libav to FFmpeg
  
  in dc62016c, it failed to take into account that the meaning of
  
  cluster_pos had changed in bda5b662 ; in particular, the special
  
  value for “I'm not currently working on a cluster” had changed
  
  from 0 to -1. This makes the avio_write_marker() call never
  
  be called. Update the if statement to fix it.
  Fixes : Ticket9843
  
  Signed-off-by : Steinar H. Gunderson <steinar+ffmpeg@gunderson.no>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/matroskaenc.c

• Add multiple overlapping audio files to a video [duplicate]

  15 juin 2024, par JTinkers

  Essentially, I'm trying to achieve this :


  


  The only problem with that is - I'm using ffmpeg programatically, meaning - there won't be any predefined sounds at predefined times, instead - I have code that generates these and executes ffmpeg with the following arguments :

  


  -f concat -r 60 -safe 0 -i {VIDEO_OUTPUT_PATH}/{fileName}.txt
{audioArgs}
-c:v libx264 -preset fast -crf 23 -vf \"scale=1080:1920,format=yuv420p\"
-c:a aac -b:a 192k
-af \"afade=t=out:st={totalSeconds - 3}:d=3\"
{mapArgs} 
-async 1 -movflags +faststart -t {totalSeconds} {outputPath}"


  


  Presumably, if there are 3 sounds (like on the image), mapArgs will be replaced with :

  


  -map 0 -map 1 -map 2 -map 3


  


  and audioArgs will be replaced with :

  


  -itsoffset 0 -i bg.mp3 -itsoffset 13 sound1.mp3 -itsoffset 37 sound2.mp3


  


  However, it seems to be playing background music and the video only - no other sounds.