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• AVC-Intra support

  20 juillet 2013, par Kieran Kunhya

  AVC-Intra support
  This format has been reverse engineered and x264’s output has almost exactly
  
  the same bitstream as Panasonic cameras and encoders produce. It therefore does
  
  not comply with SMPTE RP2027 since Panasonic themselves do not comply with
  
  their own specification. It has been tested in Avid, Premiere, Edius and
  
  Quantel.
  Parts of this patch were written by Jason Garrett-Glaser and some reverse
  
  engineering was done by Joseph Artsimovich.
  

  • [DH] common/common.c
  • [DH] common/common.h
  • [DH] common/set.h
  • [DH] encoder/analyse.c
  • [DH] encoder/encoder.c
  • [DH] encoder/ratecontrol.c
  • [DH] encoder/set.c
  • [DH] encoder/set.h
  • [DH] x264.c
  • [DH] x264.h

• How can I mux H.264 RTP output into a container using FFMPEG ?

  23 septembre 2013, par Grad

  I am working on the effects of network losses in video transmission. In order to simulate the network losses I use a simple program which drops random RTP packets from the output of H.264 RTP encoding.

  I use Joint Model (JM) 14.2 in order to encode the video. However, I don't use AnnexB format as my output, instead I choose the output as RTP packets. The JM output is generated as RTP packets with RTP headers and payload as a sequence. After that, some of RTP packets are dropped by using a simple program. Then, I decode the output by using also JM and it's error concealment methods. That gives me a YUV file as output. The format of the output is as follows :

       ----------------------------------------------------------------------
  
       | RTP Header #1 | RTP Payload #1 | RTP Header #2 | RTP Payload #2 |...
  
       ----------------------------------------------------------------------

  I want to make a subjective test with these bitstreams and it's very inconvenient to crowdsource this subjective test with GBs of video data. So, I want to mux these bitstreams into a container (i.e. AVI) by using FFMPEG. I have tried to decode these bitstreams with FFMPEG and FFPLAY ; however, both of them didn't work. I also tried the following command and it didn't work, either.

      ffmpeg - f h264 -i  -vcodec copy -r 25 out.avi

  Which format or muxer should I use ? Do I need to convert these files to any other format ?

• FFMEG : run code after complete conversion

  26 octobre 2019, par Сергей Барахтенко

  There is a code that runs FFMPEG

  shell_exec($this->config->item('ffmpeg') . ' -i ' . $path . ' ' . $cmd . ' 1>' . $folder . '/log.txt 2>&1 ');

  And there is the following line, which should, taking into account the peculiarities of the PHP language, work out immediately after shell_exec

  $params = array(
  
      'status' => 'ready'
  
  );
  
  $result = $this->model->editVideo($video_key, $params); 

  This line simply updates the status of the video in the database

  My question is, why doesn’t the further php code work after completion shell_exec ? What could be the catch ?