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• How to play ffmpeg dash ?

  30 janvier 2024, par Roshan Ojha

  I have following code to create chunk of video.

  


  permission_classes=[AllowAny]
video_serializer = serializers.video_serializer

def process_video(self, video_path, video_id):
    # Set the path where the processed videos will be saved
    output_dir = os.path.join(settings.MEDIA_ROOT, 'processed_videos')

     # Create the output directory if it doesn't exist
    os.makedirs(output_dir, exist_ok=True)

    # Add your ffmpeg_streaming code here to process the video
    full_video_path =  os.path.join(settings.MEDIA_ROOT, str(video_path))
    print(video_path)
    video = ffmpeg_streaming.input(full_video_path)
    print(video)

      # Add your ffmpeg_streaming code here to process the video
    _144p  = Representation(Size(256, 144), Bitrate(95 * 1024, 64 * 1024))
    _240p  = Representation(Size(426, 240), Bitrate(150 * 1024, 94 * 1024))
    _360p  = Representation(Size(640, 360), Bitrate(276 * 1024, 128 * 1024))
    _480p  = Representation(Size(854, 480), Bitrate(750 * 1024, 192 * 1024))
    _720p  = Representation(Size(1280, 720), Bitrate(2048 * 1024, 320 * 1024))

    dash = video.dash(Formats.h264())
    dash.representations(_144p, _240p, _360p, _480p, _720p)
    dash.output(os.path.join(output_dir, f'dash-stream-{video_id}.mpd'))


def post(self,request):
    try:
        video_data = self.video_serializer(data=request.data)
        video_data.is_valid(raise_exception=True)
        data = video_data.validated_data

        video_instance = Video.objects.create(
            id = data.get('id'),
            saved_location = data.get('video')
        )
        video_instance.save()

        self.process_video(video_instance.saved_location, video_instance.id)
        return Response({"success":True})
    except Exception as e:
        return Response({"success":False,"message":str(e)})


  


  This code is working well as it has created different chunk files as well as a .mpd file of a video inside media/processed_video folder.

  


  Then I wrote following code to stream that video using that .mpd folder.

  


      def get (self,request,video_id):
    try:
        mpd_path = os.path.join(settings.MEDIA_ROOT, 'processed_videos', f'dash-stream-{video_id}.mpd')
        
        with open(mpd_path, 'rb') as f:
            mpd_content = f.read()
            response = HttpResponse(mpd_content, content_type='application/dash+xml')

            # Set Content-Disposition header to make the response downloadable
            response['Content-Disposition'] = f'attachment; filename="dash-stream-{video_id}.mpd"'
            
            # Optionally set Content-Length header to specify the size of the file
            response['Content-Length'] = len(mpd_content)
            
            return response
        
    except Exception as e:
        return Response({"success":False,"message":str(e)})


  


  When I make get request to the api it returns content of .mpd as it is (i.e xml). When I used that api in vlc network stream, vlc couldn't play the video. But when I dragged .mpd file directly to vlc, the video gets played with 144p only. I don't know where I got wrong in GET. Please help.

  


• MPEG-DASH MPD file not playing correctly

  24 juin 2017, par CMOS

  So I am working on generating a very simple MPD manifest file for my MPEG-DASH videos and I cannot figure out what is wrong. Here is my current manifest file

  <?xml version="1.0" ?>
  
  <mpd xmlns="urn:mpeg:dash:schema:mpd:2011" minbuffertime="PT1.500S" type="static" mediapresentationduration="PT0H9M21.795S" maxsegmentduration="PT0H0M1.001S" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011">
  
      <period>
  
          <baseurl>https://mysite/uploads/sources/resolution_640/bitrate_1400/</baseurl>
  
          <adaptationset mimetype="video/mp4">
  
              <contentcomponent contenttype="video"></contentcomponent>
  
              <representation bandwidth="1400000">
  
                <segmentlist duration="119">
  
                  <initialization sourceurl="https://mysite/uploads/sources/resolution_640/bitrate_1400/640x360_1400Kpbs_0.mp4"></initialization>
  
                  <segmenturl media="https://mysite/uploads/sources/resolution_640/bitrate_1400/640x360_1400Kpbs_1.mp4"></segmenturl>
  
                  <segmenturl media="https://mysite/uploads/sources/resolution_640/bitrate_1400/640x360_1400Kpbs_2.mp4"></segmenturl>
  
                  <segmenturl media="https://mysite/uploads/sources/resolution_640/bitrate_1400/640x360_1400Kpbs_3.mp4"></segmenturl>
  
                </segmentlist>
  
              </representation>
  
          </adaptationset>
  
      </period>
  
  </mpd>

  This MPD file validates using every validator I can find. The urls for the segments are obscured for security reasons but they are all open, public and viewable individually. But when I try to run the manifest file, depending on the player I get. "No supported source found within manifest" or simply nothing happens.

  Any idea how this could be wrong ? I am currently using media url’s as absolute paths but I have also tried paths relative to the BaseURL with no luck. Any info on how I can make a very simple MPEG-Dash manifest structure would be great. I am using FFMPEG to split my video up into 150 frame segments. Thanks !

• fate/vpx : Move webm-dash-manifest tests to a new file

  28 avril 2022, par Andreas Rheinhardt

  fate/vpx : Move webm-dash-manifest tests to a new file
  These tests have basically nothing to do with VPX (they do not even
  
  require the decoder).
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] tests/Makefile
  • [DH] tests/fate/vpx.mak
  • [DH] tests/fate/webm-dash-manifest.mak