Need help generating a DASH compatible webm file.

[moonma]

Hi,

I have followed the steps described here. During playback, I get an error. I am using Shaka Player.

 

Output from browser console.

The video has now been loaded!

myplayer.html:57 Error code 3007 object O {severity: 2, category: 3, code: 3007, data: Array(0), handled: false}

 

According to Shaka player error code, 3007 means : WEBM_CUES_ELEMENT_MISSING    3007       number                The WebM Cues parser was unable to locate the Cues element. The segment index data may be corrupt.

 

How do I fix this error?

 

My steps

1. ffmpeg -i  blue_sky_1080p25.y4m -c:v libvpx-vp9 -s 160x90 -b:v 250k -keyint_min 150 -g 150  -tile-columns 4 -frame-parallel 1  -an -f webm -dash 1  sky_160x90_250k.webm
2. ffmpeg -f webm_dash_manifest -i  sky_160x90_250k.webm -c copy -map 0 -f webm_dash_manifest -adaptation_sets "id=0,streams=video" manifest.mpd

 

I provide this manifest file to the shaka player. When I load my page, I get the error code 3007 ( The WebM Cues parser was unable to locate the Cues element. The segment index data may be corrupt) from the player 

 

Thanks,

Upanita

[James Zern]

Hi,

On Wed, Sep 29, 2021 at 8:35 AM moonma <upan...@gmail.com> wrote:

Hi,

I have followed the steps described here. During playback, I get an error. I am using Shaka Player.

 

Output from browser console.

The video has now been loaded!

myplayer.html:57 Error code 3007 object O {severity: 2, category: 3, code: 3007, data: Array(0), handled: false}

 

According to Shaka player error code, 3007 means : WEBM_CUES_ELEMENT_MISSING    3007       number                The WebM Cues parser was unable to locate the Cues element. The segment index data may be corrupt.

 

How do I fix this error?

 

My steps

1. ffmpeg -i  blue_sky_1080p25.y4m -c:v libvpx-vp9 -s 160x90 -b:v 250k -keyint_min 150 -g 150  -tile-columns 4 -frame-parallel 1  -an -f webm -dash 1  sky_160x90_250k.webm
2. ffmpeg -f webm_dash_manifest -i  sky_160x90_250k.webm -c copy -map 0 -f webm_dash_manifest -adaptation_sets "id=0,streams=video" manifest.mpd

Can you give what version of ffmpeg you're using and attach the manifest? I would expect that streams=video should be streams=0 to start with [1].

Using that I see:

$ ffmpeg -y -f webm_dash_manifest -i  sky_160x90_250k.webm -map 0 -c copy -f webm_dash_manifest -adaptation_sets "id=0,streams=0" manifest.mpd

  libavutil      57.  6.100 / 57.  6.100
  libavcodec     59.  9.101 / 59.  9.101
  libavformat    59.  5.100 / 59.  5.100
  libavdevice    59.  0.101 / 59.  0.101
  libavfilter     8.  9.100 /  8.  9.100
  libswscale      6.  1.100 /  6.  1.100
  libswresample   4.  0.100 /  4.  0.100
...
Output #0, webm_dash_manifest, to 'manifest.mpd':
  Metadata:
    encoder         : Lavf59.5.100
  Stream #0:0: Video: vp9, none(tv, progressive), 160x90 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 1k tbn
    Metadata:
      ENCODER         : Lavc59.9.101 libvpx-vp9
      DURATION        : 00:00:08.680000000
      webm_dash_manifest_duration: 8680
      webm_dash_manifest_initialization_range: 506
      webm_dash_manifest_file_name: sky_160x90_250k.webm
      webm_dash_manifest_track_number: 1
      webm_dash_manifest_cues_start: 210067
      webm_dash_manifest_cues_end: 210107
      webm_dash_manifest_bandwidth: 171748
      webm_dash_manifest_cluster_keyframe: 1
      webm_dash_manifest_cue_timestamps: 0,6000

...

With the indexRange set to match:

<SegmentBase
  indexRange="210067-210107">
<Initialization
  range="0-506" />

[1] https://ffmpeg.org/ffmpeg-formats.html#Example-3

 

 

I provide this manifest file to the shaka player. When I load my page, I get the error code 3007 ( The WebM Cues parser was unable to locate the Cues element. The segment index data may be corrupt) from the player 

 

Thanks,

Upanita

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