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• Revision 24856b6abc : Speed feature to skip split partition based on var Adds a speed feature to disa

  3 août 2013, par Deb Mukherjee

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
  
  Speed feature to skip split partition based on var

  Adds a speed feature to disable split partition search based on a
  given threshold on the source variance. A tighter threshold derived
  from the threshold provided is used to also disable horizontal and
  vertical partitions.

  Results on derfraw300 :
  threshold = 16, psnr = -0.057%, speedup 1% (football)
  threshold = 32, psnr = -0.150%, speedup 4-5% (football)
  threshold = 64, psnr = -0.570%, speedup 10-12% (football)

  Results on stdhdraw250 :
  threshold = 32, psnr = -0.18%, speedup is somewhat more than derf
  because of a larger number of smoother blocks at higher resolution.

  Based on these results, a threshold of 32 is chosen for speed 1,
  and a threshold of 64 is chosen for speeds 2 and above.

  Change-Id : If08912fb6c67fd4242d12a0d094783a99f52f6c6

• hlsenc : add use_localtime_mkdir option to automatically create time-based directory

  3 février 2016, par Johan Ström

  hlsenc : add use_localtime_mkdir option to automatically create time-based directory
  Use with -use_localtime, and set -hls_segment_filename to a path which
  
  contains a subdirectory i.e. /some/path/%Y%m%d/%Y%m%dT%H%M%S-%s.ts
  
  This will mkdir the %Y%m%d-part of the path if it does not already
  
  exist.
  
  In addition, each filename in the playlist output will be prefixed with
  
  this subdirectory (if playlist and segment shares the same base path).
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/hlsenc.c

• Can't process RTP video stream from Firefox browser or Python based scripts by FFMPEG

  3 avril 2023, par Gentelam.S

  Any time I want to process (forward, analyze, copy, ...) RTP video stream from FF browser or python based scripts by FFMPEG, it "chucks" and can't work with it. Seems to be stream encoding issue.
I have a Janus server where clients join from browsers or anothers services, like Python, then I forward the stream to the URL, where FFMPEG is listening on. There is no issue when I try to process any forwarded stream coming from Chrome based browsers, but the problem occurs when I join from FF or Python.

  


  I run ffmpeg in Ubuntu container.
The command I use :
-loglevel trace -analyzeduration 300M -probesize 300M -protocol_whitelist file,udp,rtp -i port4000.sdp -vf scale=1280:720 -vcodec libx264 -profile:v baseline -preset:v ultrafast -acodec aac -f flv -flvflags no_duration_filesize {{rtmpUrl}}

  


  I used also very simple commands like the following but the result is the same :
ffmpeg -protocol_whitelist file,udp,rtp -i ./SDP/port4000.sdp -c copy -t 10 -y test.mkv

  


  The SDP file I use :

  


  SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 127.0.0.1
t=0 0
a=tool:libavformat 58.29.100
m=video 4000 RTP/AVP 96
b=AS:200
a=rtpmap:96 VP8/90000


  


  The screens below depicts how FFMPEG behaves in case of FF and Chrome (loglevel of ffmpeg set to trace).

  


  Firefox :
enter image description here

  


  Chrome :
enter image description here

  


  enter image description here

  


  enter image description here

  


  enter image description here

  


  It looks like it brokes after the following log : Before avformat_find_stream_info() pos: xxx

  


  (Same problem is if I try to run ffprobe)
Thank you for any suggestion.

  


  As described above, I tried quite a lot of of arguments running ffmpeg, different SDP files but seems to be not enough. I want the stream to be procced properly by FFMEPG.