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• Anomalie #2717 : Ne pas proposer de sauvegarde si on n’a pas sqlite

  26 mai 2013, par cedric -

  en fait je ferme pour duplicate avec #2812 et parce que "Ne pas proposer de sauvegarde si on n’a pas sqlite" n’est pas correct : cela semble faire croire que la fonction n’existe pas au lieu d’expliquer pourquoi elle n’est pas disponible.
  Quand à l’alternative sql portable, on verra quand une solution sera disponible.

• Android FFMPEG example to get frames from video using NDK

  22 avril 2016, par Mihir Shah

  I want to develop video merge application in android. I just able to generate ffmpeg.so file using NDK and JNI. But now I want to get frames of input video(around 15 sec.). Any one have an idea how to get the frames from video using ffmpeg ? Is there direct native method available for that to get frames in ffmpeg ? And how to pass command from java class to native mathod to perform video merging functionality ? Just give me solution for that.

• Playing and recording a live stream from another computer webcam using VLC/FFmpeg [closed]

  22 octobre 2012, par user573014

  I was trying lately to set a video server on one machine and play it in a differen machine, it works with me.. but the problem is that it always stuck and become jammed in the middle .. and it is very slow comparing to the original stream.. something like 5 seconds delay which is not acceptable at all !
  The warning messages I get usually includes something like that :
  in the client side, which is the one which is jammed

  [0x24d1ab0] ts demux warning: discontinuity received 0x5 instead of 0xe (pid=68)
  
  [0x7f4340015e50] rtp demux warning: 2 packet(s) lost
  
  reference picture missing during reorder
  
  Missing reference picture
  
  mmco: unref short failure
  
  Reference 4 >= 4 (H264 - MPEG-4 AVC (part 10)) stopped
  
  error while decoding MB 34 14, bytestream (575)

  and that is the picture of the streaming when it is jammed

  

  and that is what it looks like when it is running smoothly

  

  This is the error message I got on the server

  [0x2513820] main generic debug: auto hidding mouse
  
  [0x2296230] main mux warning: late buffer for mux input (1840085)

  and Finally here is my command line that I am using >
  on the server :

  vlc -vvv v4l2:///dev/video1:v4l2-width=640:v4l2-height=480 --sout 
  
  '#duplicate{dst=display,dst="transcode{vcodec=h264,vb=800,ab=128}
  
  :duplicate{dst=rtp{mux=ts,dst=172.22.2.87,port=50004}'

  on the client :

  vlc -vvv rtp://@:50004 

  I thought that it might be from VLC or from my command .. I tried different protocol for transmission, with no luck I also tried FFmpeg and I got similar results + warning messages .. I thought then that both of them are using the same libraries in Linux

  here is the command using FFMpeg :

  ffmpeg -f video4linux2 -i /dev/video1 -vcodec libx264 -s 320x240 -pix_fmt 
  
  yuv420p -vb 200000 -minrate 200000 -maxrate 200000 -bufsize 2000000 -acodec 
  
  libmp3lame -ab 128k -ar 44100 -ac 2 -f mpegts udp://172.22.2.87:5544 

  In conclusion, I would like to find a solution for the latency of the streaming (which is very high) and the jamming problem
  I appreciate anyone's input, thank you