Recherche avancée

Sur d’autres sites (5338)

• Merge commit 'e1a6d63c7eeff2f0ec8173546357bfaa9deecea4'

  4 octobre 2017, par James Almer

  Merge commit 'e1a6d63c7eeff2f0ec8173546357bfaa9deecea4'
  * commit 'e1a6d63c7eeff2f0ec8173546357bfaa9deecea4' :
  
    fate : Rename WMV8_DRM decoder tests to WMV3_DRM
  Merged-by : James Almer <jamrial@gmail.com>
  

  • [DH] tests/fate/microsoft.mak
  • [DH] tests/ref/fate/wmv3-drm-dec
  • [DH] tests/ref/fate/wmv3-drm-nodec
  • [DH] tests/ref/fate/wmv8-drm
  • [DH] tests/ref/fate/wmv8-drm-nodec

• FFmpeg.AutoGen decoding an image using av_image_copy_to_buffer

  28 juin 2022, par Steve

  I try to use FFmpeg.AutoGen.av_image_copy_to_buffer to get decoded data into my application defined frame_buffer like so :

  


  bytes_decoded = ffmpeg.av_image_copy_to_buffer(frame_data, buffer_size, frame->data, frame->linesize, 
                                               codCtx->pix_fmt, codCtx->width, codCtx->height, 1);


  


  However the type of the parameter frame->data is of type FFmpeg.AutoGen.byte_ptrArray8, but the interface expects FFmpeg.AutoGen.byte_ptrArray4.
Does anyone know how to convert this parameter, so that I can pass it to the interface ? VS complains with the following error message :
https://docs.microsoft.com/en-us/dotnet/csharp/misc/cs1503?f1url=%3FappId%3Droslyn%26k%3Dk(CS1503)

  


  Thanks in advance for any help on this issue.

  


• Play MPEG-2 TS using MseStreamSource

  27 novembre 2022, par Nicolas Séveno

  I need to display a live video stream in a UWP application.

  



  The video stream comes from a GoPro. It is transported by UDP messages. It is a MPEG-2 TS stream. I can play it successfully using FFPlay with the following command line :

  



  ffplay -fflags nobuffer -f:v mpegts udp://:8554


  



  I would like to play it with MediaPlayerElement without using a third party library.

  



  According to the following page :
https://learn.microsoft.com/en-us/windows/uwp/audio-video-camera/supported-codecs
UWP should be able to play it. (I installed the "Microsoft DVD" application in the Windows Store).

  



  I receive the MPEG-2 TS stream with a UdpClient. It works well.
I receive in each UdpReceiveResult a 12 bytes header, followed by 4, 5, 6, or 7 MPEGTS packets (each packet is 188 bytes, beginning with 0x47).

  



  I created a MseStreamSource :

  



  _mseStreamSource = new MseStreamSource();
_mseStreamSource.Opened += (_, __) =>
{
    _mseSourceBuffer = _mseStreamSource.AddSourceBuffer("video/mp2t");
    _mseSourceBuffer.Mode = MseAppendMode.Sequence;
};
_mediaPlayerElement.MediaSource = MediaSource.CreateFromMseStreamSource(_mseStreamSource);


  



  This is how I send the messages to the MseStreamSource :

  



      UdpReceiveResult receiveResult = await _udpClient.ReceiveAsync();
    byte[] bytes = receiveResult.Buffer;
    mseSourceBuffer.AppendBuffer(bytes.AsBuffer());


  



  The MediaPlayerElement displays the message "video not supported or incorrect file name". (not sure of the message, my Windows is in French).

  



  Is it a good idea to use the MseAppendMode.Sequence mode ?
What should I pass to the AppendBuffer method ? The raw udp message including the 12 bytes header or each MPEGTS 188 bytes packet ?