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• How can we feed bytearray of an image in input of ffmpeg for doing direct operation for live streaming to RTMP server

  31 janvier 2017, par Raj Kumar Singh

  What I am doing now is :

  I have a stream from a source, that give me byte array for each frame. I have to save that byte array to JPEG file. Each of the frames are being saved in memory. Then I’am streaming those JPEG to server using the FFMPEG command.

  What I want to do is :

  I want to skip the step of storing each frame as JPEG. I want to directly stream the byte array to RTMP server.

  The FFMPEG command I am using is :-

  ffmpeg -framerate 10 -i c:\Stream\img%03d.jpg -f flv rtmp://192.168.243.195/live/ac71e

• Direct ffmpeg -> OpenGL send without intermediary buffer copy

  3 juillet 2021, par Lucas Zanella

  To get a decoded frame from ffmpeg, there's the function avcodec_receive_frame :

  


  int avcodec_receive_frame   (   AVCodecContext *    avctx,
        AVFrame *   frame 
    )   


  


  Documentation : https://libav.org/documentation/doxygen/master/group__lavc__decoding.html#ga11e6542c4e66d3028668788a1a74217c

  


  The problem with this function is that I need to pass a frame to it like this :

  


  avcodec_receive_frame(&context, &frame)


  


  such that it will write the context into an AVFrame* just so I can pass it to OpenGL by doing another copy. That is, I make an unnecessary copy. For large video frames this could take time.

  


  There should be a function like this :

  


  int avcodec_receive_frame   (   AVCodecContext *    avctx,
        int (write_function*)(uint8_t data*, AVFrameParameters * parameters)
    )   


  


  this way I can pass a function pointer of a function that will take care of writing the video frame directly to OpenGL, without making an unnecessary copy. By the way, AVFrameParameters is a type I invented. It would have the parameters of the frame like color scheme, dimensions and stride, etc so I can upload properly to OpenGL.

  


  Is there a way to do something like this ? If not, why not ?

  


  PS : something even better would be for OpenGL to pass its GPU pointer to be so I can pass it to OpenGL, but I think this is too extreme

  


• Revision 749e0c7b28 : Revert "Revert "Revert 3 patches from Hangyu to get Chrome to build :"" This rev

  28 juin 2014, par James Zern

  Changed Paths :
   Modify /test/user_priv_test.cc

  
   Modify /vp9/decoder/vp9_decoder.c

  
   Modify /vp9/decoder/vp9_dthread.h

  
   Modify /vp9/vp9_dx_iface.c

  
  
  Revert "Revert "Revert 3 patches from Hangyu to get Chrome to build :""

  This reverts commit b336356198b8ada50fbb59f04f11cefceaf5ff95.

  This causes a hang in :
  VP9/InvalidFileTest.ReturnCode/3

  the change to test/user_priv_test.cc remains with a minor update

  Change-Id : I4a8a272ca37ea329b0f413f0b1cd827a238bd9fd