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• Web Development Video Creation/Editing [on hold]

  22 mai 2017, par user799451

  Im trying to create a online video editing website where users can create a music video like video.

  Currently I created a website that calls a api which does ffmpeg commands for creating my videos but its kind of slow and very cpu heavy.

  Is their any tools that I can use that can do the functionality above ?. We are willing to use any solution paid softwares of free.

  Any suggestion will be helpful thanks in advance.

• ffmpeg decode one video frame at a time

  28 juillet 2014, par Krishna

  Most ffmpeg examples online show video decoding using a while () and the entire sequence is decoded in one attempt. For example,

  while(av_read_frame(pFormatCtx, &packet)>=0) {
  
      if(packet.stream_index==videoStream) {
  
  
  
          // Decode video frame
  
          avcodec_decode_video(pCodecCtx, pFrame, &frameFinished,
  
                       packet.data, packet.size);
  
  
  
          // Did we get a video frame?
  
          if(frameFinished) {
  
               ... do something   
  
          }
  
       } 
  
  
  
    // Free the packet that was allocated by av_read_frame
  
    av_free_packet(&packet);
  
  }

  Is there a technique to (1) create a function that will decode only one frame and (2) then call that function repeatedly (how many ever times needed).

  I wrote such a function and tried to decode an HEVC stream and I always get this error "Could not find ref with POC xx", where xx stands for some integer. Looks like it can’t find references — how do I get around this ?

  Thanks !

• Fix compile error on bfin.

  4 août 2014, par Bernd Kuhls

  Fix compile error on bfin.
  After the removal of all Blackfin architecture optimizations in
  
  http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b55d3bbeed375f7b74442c4dd274d116a3e3d2e1
  
  some includes were left behind leading to a compile error :
  CC      libavformat/adtsenc.o
  
  In file included from ./libavcodec/get_bits.h:35,
  
                   from ./libavcodec/ac3_parser.h:27,
  
                   from libavformat/ac3dec.c:23 :
  
  ./libavcodec/mathops.h:43:29 : error : bfin/mathops.h : No such file or directory
  This compile error was found by buildroot autobuild system :
  
  http://autobuild.buildroot.net/results/ae0/ae056f267e907091d09d2a1546d6f1ae02fa23b9/
  Signed-off-by : Bernd Kuhls <bernd.kuhls@t-online.de>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/mathops.h
  • [DH] libavutil/bswap.h
  • [DH] libavutil/timer.h