[FFmpeg-trac] #9902(undetermined:new): Unable to Play encoded video using FFmpeg webm_dash_manifest encoder with Dash.js

[FFmpeg]

#9902: Unable to Play encoded video using FFmpeg webm_dash_manifest encoder with
Dash.js
-------------------------------------+-------------------------------------
             Reporter:  shirsendu    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Hi,
     I am trying to transcode in webm dash format using

 ffmpeg \
  -f webm_dash_manifest -i video_160x90_250k.webm \
  -f webm_dash_manifest -i video_320x180_500k.webm \
  -f webm_dash_manifest -i video_640x360_750k.webm \
  -f webm_dash_manifest -i audio_128k.webm \
  -c copy -map 0 -map 1 -map 2 -map 3 \
  -adaptation_sets "id=0,streams=0,1,2 id=1,streams=3" \
  -f webm_dash_manifest \
  manifest.mpd

 Which generates a manifest.mpd file which looks like this

 ```
 <?xml version="1.0" encoding="UTF-8"?>
 <MPD
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns="urn:mpeg:DASH:schema:MPD:2011"
   xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011"
   type="static"
   mediaPresentationDuration="PT8864.3S"
   minBufferTime="PT1S"
   profiles="urn:mpeg:dash:profile:webm-on-demand:2012">
 <Period id="0" start="PT0S" duration="PT8864.3S" >
 <AdaptationSet id="0" mimeType="audio/webm" codecs="opus" lang="hin"
 audioSamplingRate="48000" bitstreamSwitching="true"
 subsegmentAlignment="true" subsegmentStartsWithSAP="1">
 <Representation id="0" bandwidth="99209">
 <BaseURL>audio.webm</BaseURL>
 <SegmentBase
   indexRange="109939455-109976406">
 <Initialization
   range="0-864" />
 </SegmentBase>
 </Representation>
 </AdaptationSet>
 <AdaptationSet id="1" mimeType="video/webm" codecs="av1" lang="hin"
 bitstreamSwitching="false" subsegmentAlignment="true"
 subsegmentStartsWithSAP="1">
 <Representation id="1" bandwidth="474873" width="792" height="330">
 <BaseURL>video-800p.webm</BaseURL>
 <SegmentBase
   indexRange="200763509-200791162">
 <Initialization
   range="0-884" />
 </SegmentBase>
 </Representation>
 <Representation id="2" bandwidth="1236911" width="1272" height="530">
 <BaseURL>video-1280p.webm</BaseURL>
 <SegmentBase
   indexRange="596699241-596726959">
 <Initialization
   range="0-884" />
 </SegmentBase>
 </Representation>
 <Representation id="3" bandwidth="3732848" width="1920" height="800">
 <BaseURL>video-1920p.webm</BaseURL>
 <SegmentBase
   indexRange="1775390115-1775417858">
 <Initialization
   range="0-884" />
 </SegmentBase>
 </Representation>
 </AdaptationSet>
 </Period>
 </MPD>
 ```

 Trying to play the video using dash.js failed saying

 then if I change this specific line codecs part
 ```
 <AdaptationSet id="1" mimeType="video/webm" codecs="av1" lang="hin"
 bitstreamSwitching="false" subsegmentAlignment="true"
 subsegmentStartsWithSAP="1">
 ```
 codecs="av1" -> codecs="av01.0.01M.08.0.111.01.01.01.0"

 then files starts playing normally

 site note I got this codec name when I try to transcode using dash encoder
 in ffmpeg not the webm_dash_manifest encoder

 also bitstreamSwitching in video is false by default where it should be
 true for a video
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9902>
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