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• Queuing up videos for live stream

  5 avril 2014, par Abdul Ali

  Would first like to tell that am new to streaming and ffmpeg.

  Would try to explain scenario as much as possible.

  A web service is intended to receive chunks of video from a user. those chunks need to be simultaneously sent to the web for live streaming for a seamless viewing.

  So the videos need to be queued up for streaming to the web so that it looks like a long single video. and the strict requirement is not to make any temp file on disk.

  Did read something about pipes but am completely alien to that concept as well.

  Kindly tell how / whether this can be achieved from FFMPEG or any other free tool .

  Language used is PHP . The received videos also need to be saved to disk in parallel for new users to see from start.

• qsv : Make the hevc idr_interval consistent with the h264 one

  17 octobre 2017, par Luca Barbato

  qsv : Make the hevc idr_interval consistent with the h264 one
  According to the MediaSDK documentation the idr_interval value has
  
  a different meaning depending on the codec :
      0 in H264 means make every I-frame IDR, in HEVC it means to have
  
      it only at the beginning.
      1 in H264 means every other I-frame is not-IDR, in HEVC it means
  
      that every I-frame is IDR.
  Keep the behaviour consistent between the two encoders by increasing
  
  by 1 internally the idr_interval value for HEVC.
  

  • [DBH] libavcodec/qsvenc_hevc.c

• How should I use the dash (not webm_dash_manifest !) format in ffmpeg ?

  15 février 2017, par Alton Patrick

  FFmpeg has a format named "dash" :

  > ffmpeg -formats
  
  ...
  
    E dash            DASH Muxer
  
  ...

  This presumably corresponds to the code in libavformat/dashenc.c.

  I can find a number of items on the web about how to use the WebM DASH Manifest format, but nothing at all about this other DASH format.

  Can someone point me to documentation or examples that use the "DASH Muxer" either from the command line or API ?