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Linux_64, Youtube: HTML 5 videos are black although sound and buttons work perfectly

  • 3 件の返信
  • 2 人がこの問題に困っています
  • 2 回表示
  • 最後の返信者: cor-el

Bornerdogge
Bornerdogge
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Hi,

I have an up-to-date Firefox on a 64 bits GNU/Linux, also up-to-date (it's PCLinuxOS).

Flash videos work sufficiently well (quite slow though, but I guess that's normal), but I have a problem with HTML 5 videos on youtube (haven't tried other ones): the buttons are displayed correctly and are functional, the sound of the video is rendered without problems. But there is no video, all I get is a black image. When I right-click on "Stats for nerds", I see:

Dimensions: 640x360 Resolution: 0x0 Stream type: https Mime Type: video/mp4; codecs="avc1.42001E, mp4a.40.2"

All the "decoded frames", "video bytes decoded", etc. fields are empty ("-").

I have tried to launch firefox in safe mode, disabling hardware acceleration (which anyhow doesn't work on linux, does it?), emptied the cache, none of it worked...

What do you think?

Hi, I have an up-to-date Firefox on a 64 bits GNU/Linux, also up-to-date (it's PCLinuxOS). Flash videos work sufficiently well (quite slow though, but I guess that's normal), but I have a problem with HTML 5 videos on youtube (haven't tried other ones): the buttons are displayed correctly and are functional, the sound of the video is rendered without problems. But there is no video, all I get is a black image. When I right-click on "Stats for nerds", I see: Dimensions: 640x360 Resolution: 0x0 Stream type: https Mime Type: video/mp4; codecs="avc1.42001E, mp4a.40.2" All the "decoded frames", "video bytes decoded", etc. fields are empty ("-"). I have tried to launch firefox in safe mode, disabling hardware acceleration (which anyhow doesn't work on linux, does it?), emptied the cache, none of it worked... What do you think?

この投稿は Bornerdogge により に変更されました

選ばれた解決策

You can try to set the media.gstreamer.enabled pref to false to see if that makes YouTube send the media file in a different format in case you do not have the proper codec to play the mp4 file.

You can open the about:config page via the location bar.

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cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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選ばれた解決策

You can try to set the media.gstreamer.enabled pref to false to see if that makes YouTube send the media file in a different format in case you do not have the proper codec to play the mp4 file.

You can open the about:config page via the location bar.

Bornerdogge
Bornerdogge 質問者
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Thank you, that solved the problem! :)

What might be the cause of this? I thought the codecs used by youtube were supported by firefox?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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This is not about codecs or media support in Firefox, but about native GStreamer support in Linux.

Note that disabling this pref also prevents playing other supported media formats like mp3 via the HTML5 media player.

この投稿は cor-el により に変更されました