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• ffmpeg-mp4box-mpeg dash plays only few segments

  30 octobre 2015, par Idris

  Need help in debugging the segment dash files

  The input was an MP4 with these details. This was recorded from a video camera, the output from the camera was mkv and we converted into MP4 after editing the audio via adobe

  • Size : 7.51 GB Frame rate : 25 frames/ second
  • Data rate : 25326kbps
  • Total bitrate : 25525kbps

  Converted this to another mp4 with this command

  ffmpeg -i "input.mp4" -s 1280x720 -c:v libx264 -b:v 750k -bf 2 -g 75 -sc_threshold 0 -an video_1280x720_750k.mp4
  
  
  
  ffmpeg -i "input.mp4"  -c:a aac -strict experimental -b:a 96k -ar 32000 -vn audio_96k.mp4

  The output video has

  • fps : 25
  • Data rate : 761kbps
  • bitrate : 761kbps

  Then, created the segmented dash through MP4Box

  MP4Box -dash 10000 -frag 10000 -rap -segment-name video_0_1280000\segment_ video_1280x720_750k.mp4
  
  
  
  MP4Box -dash 3000 -frag 10000 -rap -segment-name audio_0_96000\segment_ audio_96k.mp4

  The MPD generated was validated online and its perfect

  UPDATE ! Included the MPD file

  <?xml version="1.0"?>
  
  
  
  <mpd xmlns="urn:mpeg:dash:schema:mpd:2011" minbuffertime="PT1.500S" type="static" mediapresentationduration="PT0H2M0.000S" maxsegmentduration="PT0H0M10.000S" profiles="urn:mpeg:dash:profile:full:2011">
  
   <programinformation moreinformationurl="http://gpac.sourceforge.net">
  
    
  
   </programinformation>
  
  
  
   <period duration="PT0H2M0.000S">
  
     <adaptationset segmentalignment="true" lang="eng">
  
       <representation mimetype="audio/mp4" codecs="mp4a.40.2" audiosamplingrate="32000" startwithsap="1" bandwidth="98434">
  
         <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
  
         <segmentlist timescale="32000" duration="319999">
  
           <initialization sourceurl="audio_0_96000/segment_init.mp4"></initialization>
  
           <segmenturl media="audio_0_96000/segment_1.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_2.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_3.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_4.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_5.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_6.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_7.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_8.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_9.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_10.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_11.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_12.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_13.m4s"></segmenturl>
  
         </segmentlist>
  
       </representation>
  
     </adaptationset>
  
    <adaptationset segmentalignment="true" maxwidth="1280" maxheight="720" maxframerate="25" par="16:9" lang="eng">
  
     <representation mimetype="video/mp4" codecs="avc3.64001f" width="1280" height="720" framerate="25" sar="1:1" startwithsap="1" bandwidth="764668">
  
      <segmentlist timescale="12800" duration="125866">
  
       <initialization sourceurl="video_0_1280000/segment_init.mp4"></initialization>
  
       <segmenturl media="video_0_1280000/segment_1.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_2.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_3.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_4.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_5.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_6.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_7.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_8.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_9.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_10.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_11.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_12.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_13.m4s"></segmenturl>
  
      </segmentlist>
  
     </representation>
  
    </adaptationset>
  
  
  
   </period>
  
  </mpd>

  Played the video through dashjs.. I believe it just plays the initial segment and errors out as MEDIA_ERR_DECODE..MEDIA_ERR_SRC_NOT_SUPPORTED.. or some message which says start not found..

  Through chrome debugging I see that atleast 4 segments are correctly loading.. I am not sure whats going on..

  Any help in debugging the issue is really appreciated. I really can’t understand if this is a problem with the file or ffmpeg or mp4box or chrome.

  Output from chrome debugging tool

  [dash.js 1.5.1] new MediaPlayer instance has been created 
  
  dash.all.js:11 Playback initiated! 
  
  dash.all.js:11 Parsing complete: ( xml2json: 5ms, objectiron: 10ms, total: 0.015s) 
  
  dash.all.js:11 Manifest has been refreshed at Mon Oct 26 2015 10:19:22 GMT-0400 (Eastern Daylight Time)[1445869162092]  
  
  dash.all.js:11 SegmentTimeline detected using calculated Live Edge Time 
  
  dash.all.js:11 MediaSource is open! 
  
  dash.all.js:11 [object Event] 
  
  dash.all.js:11 Duration successfully set to: 120 
  
  dash.all.js:11 Added 0 inline events 
  
  dash.all.js:11 video codec: video/mp4;codecs="avc3.64001f" 
  
  dash.all.js:11 [video] stop 
  
  dash.all.js:11 audio codec: audio/mp4;codecs="mp4a.40.2" 
  
  dash.all.js:11 [audio] stop 
  
  dash.all.js:11 No text data. 
  
  dash.all.js:11 No fragmentedText data. 
  
  dash.all.js:11 No muxed data. 
  
  dash.all.js:11 [video] start 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [audio] start 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 [audio] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] Getting the request for time: 9.83328125 
  
  dash.all.js:11 [video] Index for time 9.83328125 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [audio] Getting the request for time: 9.99996875 
  
  dash.all.js:11 [audio] Index for time 9.99996875 is 0 
  
  dash.all.js:11 [audio] SegmentList: 0 / 120 
  
  dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 
  
  dash.all.js:11 loaded audio:Media Segment:0 (200, 20ms, 6ms) 
  
  dash.all.js:11 loaded video:Media Segment:0 (200, 153ms, 43ms) 
  
  dash.all.js:11 loaded video:Initialization Segment:NaN (200, 0ms, 32ms) 
  
  dash.all.js:11 [video] Initialization finished loading 
  
  dash.all.js:11 loaded audio:Initialization Segment:NaN (200, 0ms, 34ms) 
  
  dash.all.js:11 [audio] Initialization finished loading 
  
  dash.all.js:11 [video] Getting the request for time: 19.6665625 
  
  dash.all.js:11 [video] Index for time 19.6665625 is 1 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [audio] Getting the request for time: 19.9999375 
  
  dash.all.js:11 [audio] Index for time 19.9999375 is 1 
  
  dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [video] Stalling Buffer 
  
  dash.all.js:11 [video] Waiting for more buffer before starting playback. 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [audio] Stalling Buffer 
  
  dash.all.js:11 [audio] Waiting for more buffer before starting playback. 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 <video> loadedmetadata 
  
  dash.all.js:11 Starting playback at offset: 0 
  
  dash.all.js:11 [video] Getting the request for time: 29.499843750000004 
  
  dash.all.js:11 [video] Index for time 29.499843750000004 is 2 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 
  
  dash.all.js:11 [video] Got enough buffer to start. 
  
  dash.all.js:11 [video] seek: 0 
  
  dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 
  
  dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 
  
  dash.all.js:11 [audio] Got enough buffer to start. 
  
  dash.all.js:11 [audio] seek: 0 
  
  dash.all.js:11 loaded audio:Media Segment:9.99996875 (200, 67ms, 24ms) 
  
  dash.all.js:11 loaded video:Media Segment:9.83328125 (200, 71ms, 31ms) 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 9.984 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 Start Event Controller 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 19.999968 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 <video> play 
  
  dash.all.js:11 [video] start 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [audio] start 
  
  dash.all.js:11 <video> playing 
  
  dash.all.js:11 [video] Buffered Range: 0 - 9 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 Do seek: 0.032 
  
  dash.all.js:11 <video> seek 
  
  dash.all.js:11 [video] Getting the request for time: 29.499843750000004 
  
  dash.all.js:11 [video] Index for time 29.499843750000004 is 2 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 
  
  dash.all.js:11 [video] seek: 0.032 
  
  dash.all.js:11 [audio] seek: 0.032 
  
  dash.all.js:11 [video] Getting the request for time: 9 
  
  dash.all.js:11 [video] Index for time 9 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 
  
  dash.all.js:11 [video] Buffered Range: 0 - 18 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 loaded video:Media Segment:19.6665625 (200, 42ms, 33ms) 
  
  dash.all.js:11 <video> seeked 
  
  dash.all.js:11 Start Event Controller 
  
  dash.all.js:11 <video> playing 
  
  dash.all.js:11 [video] Buffered Range: 0 - 28 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [audio] Getting the request for time: 19.999968 
  
  dash.all.js:11 [audio] Index for time 19.999968 is 1 
  
  dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 
  
  dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 
  
  dash.all.js:11 loaded audio:Media Segment:19.9999375 (200, 102ms, 2ms) 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 29.983968 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 loaded audio:Media Segment:29.999906250000002 (200, 26ms, 2ms) 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 39.999968 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 loaded video:Media Segment:29.499843750000004 (200, 47ms, 7ms) 
  
  dash.all.js:11 Video Element Error: MEDIA_ERR_DECODE 
  
  dash.all.js:11 [video] stop 
  
  dash.all.js:11 [audio] stop 
  
  dash.all.js:11 Video Element Error: MEDIA_ERR_SRC_NOT_SUPPORTED 
  
  dash.all.js:11 <video> play 
  
  </video></video></video></video></video></video></video>

• 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 !