601588 - Videos are slow during the download of the video. Play smoothly once totally downloaded

Status: RESOLVED DUPLICATE of bug 570335

(Firefox for Android Graveyard :: General, defect)

Description

[Paul Rouget [:paul]]

I play this video:
http://paulrouget.com/2big/sintel/mobile.webm
in a web page (Fennec/Android).

With this code:

<video controls preload="auto" onclick="this.play()" src="mobile.webm"></video>

See: http://paulrouget.com/2big/sintel/test_mobile.html

First, we see the throbber (loading the video).
Then, the throbber disappears.
Then, I click on the video, the video starts playing.
But on top, we see a half transparent black veil, and the video is slow (~2 fps).
We see (via the controls) that the video is still being downloaded.
Once the video is 100% download, the veil disappears and the video is smooth (~10 fps).

The veil should not be visible when the video is playing, and the video should be smooth even if it's being downloaded.

Comment 1

[Brian Carpenter [:geeknik]]

URL no longer exists, unable to test this. Please update the bug with a valid URL or close the bug if this is no longer an issue.

Comment 2

[Paul Rouget [:paul]]

Updated.

Comment 3

[Paul Rouget [:paul]]

Shorter version: http://paulrouget.com/2big/sintel/test_mobile2.html

With the latest nightly:
* no black veil anymore
* the video is still slow while downloading, but way better than before

By slow, now, I mean: "play smoothly for 1s, stuck for 1s, play smoothly for 1s, stuck for 1s, ...". One downloaded, play smoothly until the end.

Also, if I activate GL, looks like it's working better.

Comment 4

[Paul Rouget [:paul]]

Sorry, forget about GL. It was better because browser.tab.remote was false.

Comment 5

[Paul Rouget [:paul]]

(with GL, crash)

Comment 6

[Matt Brubeck (:mbrubeck)]

We have various bugs about speeding up video playback on Fennec; we will collect links to the most important ones at https://wiki.mozilla.org/Fennec/Features/video

Marking this bug as a duplicate for now.