[FFmpeg-trac] #9999(undetermined:new): Failure to create webm manifest for single key-frame video

[FFmpeg]

#9999: Failure to create webm manifest for single key-frame video
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             Reporter:  jlenart      |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  webm         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Kerry Shetline):

 I've run into the same error. I'm trying to create a manifest for three
 VP9/webm video files generated by Handbrake, and one Vorbis/webm audio
 file generated by ffmpeg.

 I've done this before without a problem, but only for a couple of other
 movies. For some reason one movie is now giving me this "Error parsing
 Cues" grief. I'm running an automated process to enable streaming for a
 large collection of movies, but I've only processed a couple of other
 movies successfully before hitting this glitch, so perhaps it will come up
 often.

 I only mention that it's an automated process to say that the other movies
 which worked were converted from H.264 to VP9 in exactly the same way,
 without any subsequent problems.

 I've posted a sample video that fails here:
 https://shetline.com/video/sample.v480.webm

 The video plays without a problem, mediainfo works with it without a
 problem, but it fails using ffmpeg or ffprobe.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9999#comment:4>
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