1150165 - Nightly HTML5 1080p 60fps very choppy OS X Yosemite

Status: RESOLVED INACTIVE

(Core :: Audio/Video: Playback, defect)

Description

[Andy Bajka]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150401085108

Steps to reproduce:

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:40.0) Gecko/20100101 Firefox/40.0

Go to YouTube and play this video:

https://www.youtube.com/watch?v=YyNEjTMx7JU

Select 1080p at 60fps


Actual results:

 The video is very choppy.


Expected results:

The video should play smooth like it does in Chrome and Safari.

Comment 1

[Jean-Yves Avenard [:jya]]

What Mac are you using?

Comment 2

[Andy Bajka]

Here are the details of my iMac.

iMac (21.5-inch, Mid 2011)
2.5 GHz Intel Core i5
4 GB 1333 MHz DDR3
AMD Radeon HD 6750M 512 MB

Comment 3

[Jean-Yves Avenard [:jya]]

Can you try setting the preference media.hardware-video-decoding.enabled to false ; and see if it's any better ?

Comment 4

[Andy Bajka]

I don't see "media.hardware-video-decoding.enabled" in about:config settings.

Comment 5

[Andy Bajka]

I went to YouTube just now and the video located here:

https://www.youtube.com/watch?v=YyNEjTMx7JU

now plays fine in 1080p 60fps. Although the resolution fades in and out every few seconds. In Chrome the resolution also varies bit it's a lot smoother.

Comment 6

[Andy Bajka]

Turns out the problem is these videos are embedding in my XenForo forum, here's an example:

http://www.southbayriders.com/forums/threads/145506/

When I play the embedded YouTube video in 1080p 60 fps the video gets chopy and frames are skipped.

This is the code I use in XenForo to display the embedded video.

<iframe width="720" height="480" style="border:thin solid #333" src="https://www.youtube.com/embed/{$id}?vq=hd1080&iv_load_policy=3" frameborder="0" allowfullscreen></iframe>

Comment 7

[Andy Bajka]

Turns out the problem was I had the following iFrame:

<iframe width="720" height="480" style="border:thin solid #333" src="https://www.youtube.com/embed/{$id}?vq=hd1080&iv_load_policy=3" frameborder="0" allowfullscreen></iframe>

if I remove the "?vq=hd1080&iv_load_policy=3" portion it works fine.

<iframe width="720" height="480" style="border:thin solid #333" src="https://www.youtube.com/embed/{$id}" frameborder="0" allowfullscreen></iframe>

Comment 8

[Jean-Yves Avenard [:jya]]

(In reply to Andy Bajka from comment #4)
> I don't see "media.hardware-video-decoding.enabled" in about:config settings.

you may have to create it, or maybe it's only going to be in tomorrow's nightly.

If you've resolved your problem, can you close this bug ?

Comment 9

[Andy Bajka]

Thank you. I'll change status to Resolved now.

Comment 10

[Andy Bajka]

I changed status of this bug report to UNCONFIRMED because it's doing it again, the video is real choppy video. I have no idea why it works sometimes and not other times.

I added the "media.hardware-video-decoding.enabled" and tried both true and false, makes no difference.

Comment 11

[Andy Bajka]

I think the choppy problem has something to do with the iFrame tag and 1080p60. If i first view the video in the embedded iFrame and select 1080p60 as seen here:

http://www.southbayriders.com/forums/threads/145506/

The the video will be choppy, even if I click the YouTube link at the bottom and view on YouTube, the video continues to be choppy. However if I exit Nightly and go to the same link:

http://www.southbayriders.com/forums/threads/145506/

but instead of watching the video in the embedded iFrame I click the YouTube link, click to play and select 1080p60, the video plays fine.

Comment 12

[Andy Bajka]

Now I can't get it to fail. This is a very random problem.

Comment 13

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

Is this still an issue?

Comment 14

[Nils Ohlmeier [:drno]]

Mass closing because of inactivity.
Please feel free to re-open if still relevant.