[tor-bugs] #17970 [Tor Browser]: Only audio in mp4 videos

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#17970: Only audio in mp4 videos
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 Reporter:  slycelote    |          Owner:  tbb-team
     Type:  defect       |         Status:  new
 Priority:  Medium       |      Milestone:
Component:  Tor Browser  |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
  Sponsor:               |
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Comment (by slycelote):

 Yeah, I saw that page, that's why I mentioned that Firefox works on the
 same configuration. The problem is in Tor Browser. Latest version is based
 on Firefox 38, so it should work.

 Replying to [comment:1 cypherpunks]:
 > > During playback of mp4 videos I only see a white screen. Firefox on
 the same machine works fine. Also, webm videos work.
 > [https://developer.mozilla.org/en-
 US/docs/Web/HTML/Supported_media_formats Media formats supported by the
 HTML audio and video elements]:
 > > To avoid patent issues, support for MPEG 4, H.264 and MP3 is not built
 directly into Firefox. Instead it relies on support from the OS or
 hardware (the hardware also needs to be able to support the profile used
 to encode the video, in the case of MP4). Firefox supports these formats
 on the following platforms: Windows Vista+ since Firefox 22.0, Android
 since Firefox 20.0, Firefox OS since Firefox 15.0, Linux since Firefox
 26.0 (relies on GStreamer codecs) and OS X 10.7 since Firefox 35.0.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17970#comment:2>
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