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• avformat/mov : Store trak > udta metadata on each stream

  15 janvier, par Rémi Bernon

  avformat/mov : Store trak > udta metadata on each stream
  Some files keep extra metadata such as 'name' fields within udta, and
  
  it is useful for Wine to access them with the "export_all" option so
  
  they can then be exposed to Windows applications.
  Signed-off-by : Rémi Bernon <rbernon@codeweavers.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/mov.c

• Is there a way to cut movement "dead air" on a screen recording ? [closed]

  16 mai 2023, par Raelbe

  I have got a couple of screen recordings of a painting I've done, and I've managed to concat the files together.

  


  Unfortunately, there is a lot of "dead air" in the video (where I have left my desk, so there is no movement happening on screen) is there a way to cut out this down time ?

  


  I found an example that another artist uses for his screen recordings, so I plugged it in with my file directory's. This is what I used :

  


  .\ffmpeg -f concat -safe 0 -i "merge.txt" -vf npdecimate=hi=64*12:lo=64*5:frac=0.33,seipts=N/30/TB,"setpts=0.25*PTS" -r 30 -crf 30 -an Illu_Test.mp4


  


  I got this error message at the end :

  


  [AVFilterGraph @ 000001cadfe5b1c0] No option name near 'N/30/TB'
[AVFilterGraph @ 000001cadfe5b1c0] Error parsing a filter description around: ,setpts=0.25*PTS
[AVFilterGraph @ 000001cadfe5b1c0] Error parsing filterchain 'npdecimate=hi=64*12:lo=64*5:frac=0.33,seipts=N/30/TB,setpts=0.25*PTS' around: ,setpts=0.25*PTS
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0`


  


  So I chopped it up a bit and this is what I used to concat the files and it worked perfectly.

  


  .\ffmpeg -f concat -safe 0 -i "merge.txt" -crf 30 -an Illu_Test.mp4


  


  Now, I'm looking to cut out the seconds of no movement. I'm unsure what the -crf command does (as stated I am brand new to this) OG artist states that :

  


  "This is the tolerance level that determines whether there has been enough change between frames or not to be considered as detected motion."

  


  Any help would be appreciated.

  


  (Apologies if the format of this question is wrong)

  


• RTSP Streaming Server C++

  24 août 2020, par Lakshya

  I would like to write a RTSP streaming server using C++. Multiple clients will be connected to this server for receiving the streamed data.

  


  What I understand is that I need to do socket programming in C++ for client server architecture.

  


  I know FFMPEG has command line support for streaming audio/video. But my requirement is writing a client server socket model in C++.

  


  I had a look at https://www.medialan.de/usecase0001.html

  


  I am also looking at this. https://www.youtube.com/watch?v=MEMzo59CPr8

  


  but I am not sure if this will help me.

  


  For streaming the audio/video data, Do i need to use FFMEPG APIs. If yes, which libraries of FFMPEG i need to use ?.