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• avcodec/mpegpicture : Decrease size of encoding_error array

  10 janvier 2022, par Andreas Rheinhardt

  avcodec/mpegpicture : Decrease size of encoding_error array
  The current size is AV_NUM_DATA_POINTERS (i.e. eight).
  
  This number is chosen in order to minimize the amount of allocations
  
  for AVFrame.extended_(data|buf) for audio ; it is meaningless
  
  for video for which four is sufficient. So decrease this array
  
  in order to minimize what is copied in ff_mpeg_ref_picture()
  
  and at the places that copy a whole MpegEncContext.
  Also do the same for snowenc.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/mpegpicture.h
  • [DH] libavcodec/mpegvideo_enc.c
  • [DH] libavcodec/snow.h
  • [DH] libavcodec/snowenc.c

• Can stream to Facebook using ffmpeg but not when using tee

  16 mai 2017, par MazeHatter

  I’m trying to stream to YouTube and Facebook simultaneously using ffmpeg.

  I can do them individually, but I want to use "tee" to send the results of encoding to two places.

  If I do :

  ffmpeg -re -i pipe:0 -acodec libfdk_aac -bsf:a aac_adtstoasc \
  
      -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline \
  
      -s 720x480 -bufsize 2048k -vb 1300k -maxrate 4000k -deinterlace \
  
      -vcodec libx264 -g 25 -r 25 \
  
      -f flv "rtmp://rtmp-api.facebook.com:80/rtmp/key"

  It works just fine.

  But if I do :

  ffmpeg -re -i pipe:0 -acodec libfdk_aac -bsf:a aac_adtstoasc \
  
      -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline \
  
      -s 720x480 -bufsize 2048k -vb 1300k -maxrate 4000k -deinterlace \
  
      -vcodec libx264 -g 25 -r 25 \
  
      -f tee -map 0:v -map 0:a \
  
      "[f=flv]rtmp://rtmp-api.facebook.com:80/rtmp/key"

  Then I get a rtmp 104 error.

  If that would work then I could just do :

          "[f=flv]rtmp://rtmp-api.facebook.com:80/rtmp/key|[f=flv]rtmp://youtube.etc"

  And that would stream to both.

  I did find out that I needed "-bsf:a aac_adtstoasc" otherwise the encoder broke, complaining about malformed bits.

  Any ideas ?

  The error is only with Facebook. YouTube works fine.

  Console output :

    Metadata:
  
      encoder         : Lavf57.72.101
  
      Stream #0:0: Video: h264 (libx264), yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 1300 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
  
      Metadata:
  
        encoder         : Lavc57.95.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 2000000/0/1300000 buffer size: 2048000 vbv_delay: -1
  
      Stream #0:1: Audio: aac (libfdk_aac), 44100 Hz, stereo, s16, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.95.101 libfdk_aac
  
  frame=   61 fps= 30 q=25.0 size=N/A time=00:00:01.97 bitrate=N/A speed=0.961x        
  
  WriteN, RTMP send error 104 (136 bytes)

• vulkan_decode : simplify and make session parameter generation more robust

  21 juin 2023, par Lynne

  vulkan_decode : simplify and make session parameter generation more robust
  This commit scraps a bool to signal to recreate the session parameters,
  
  but instead destroys them, forcing them to be recreated.
  As this can happen between start_frame and end_frame, do this
  
  at both places.
  

  • [DH] libavcodec/vulkan_av1.c
  • [DH] libavcodec/vulkan_decode.c
  • [DH] libavcodec/vulkan_decode.h
  • [DH] libavcodec/vulkan_h264.c
  • [DH] libavcodec/vulkan_hevc.c