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• libavformat/rtpdec_opus : Set duration field on Opus AVPacket

  12 mai, par Jonathan Baudanza

  libavformat/rtpdec_opus : Set duration field on Opus AVPacket
  This commit will properly set the duration field of Opus AVPackets.
  
  Currently, duration is set to 0 on Opus packets from the RTP demuxer.
  The Ogg muxer depends on the duration field to properly compute the page granule
  
  value. Without a proper duration, the granule will be wrong, and result in
  
  negative pts values in ogg files.
  See oggenc.c:657 (ogg_write_packet_internal)
  This commit calculates using the opus_duration function, which was copied
  
  from oggparseopus.c
  I moved this functionality and the existing opus extradata functionality
  
  (added by me in 6c24f2b) into a new rtpdec_opus.c file.
  Reviewed-by : Tristan Matthews <tmatth@videolan.org>
  
  Signed-off-by : Marvin Scholz <epirat07@gmail.com>
  

  • [DH] libavformat/Makefile
  • [DH] libavformat/rtpdec.c
  • [DH] libavformat/rtpdec_formats.h
  • [DH] libavformat/rtpdec_opus.c

• avcodec/ituh263enc : Don't use h263_plus field

  21 mai, par Andreas Rheinhardt

  avcodec/ituh263enc : Don't use h263_plus field
  It is equal to codec_id == AV_CODEC_ID_H263P, check for that instead.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/ituh263enc.c
  • [DH] libavcodec/mpegvideo_enc.c

• Create video with size based on image and place a video somewhere with an offset

  10 mars 2024, par NoKey

  I am trying out FFMPEG and I am unsure how hard it is to do what I want. I have some device frames and I want to play a video inside the frame. For example, this is a device frame :

  


  

  


  Now I want to play a video within the screen of the iPhone. I already got the exact X and Y offset where the video must be placed to show it correctly. I have the following challenges to make it work, and I want to make sure FFMPEG can do it before I spend to much time reinventing the wheel :

  


  


  • The output of the video must be as big as the PNG. This is already a
confusing part for me. I have the width and height already available,
but the things I saw is that FFMPEG will take over the input of the
video as final size. The final output of the video should of course
be the length of the input video.

    


  


  • The background must be transparant (so no black background, I want to
play the video on top of a website so it's nice if it's transparant and the corners are not black).

    


  


  • The ability to place a video somewhere with a specified X and Y
offset inside the device frame.

    


  


  • Not sure if it's possible in the same command, but maybe the video
needs to be resized to make it fit. I got the exact dimensions for
the video.

    


  


  


  The things I struggle most is point 1 where the output video must have a transparant background and where the device frame is placed in. Does anybody got tips ?