1201126 - 1080p 60 FPS video stuttering and occasionally stopping playback

Status: RESOLVED WORKSFORME

(Core :: Audio/Video: Playback, defect, P2)

Description

[ssimon]

Attachment: fx42_Zito_DxDiag.txt

Actual Results:
Streaming youtube video at 1080p 60fps in a tab while visiting other sites in additional tabs sometimes causes the video to stutter and not stream smoothly. Occasionally the video will stop playing with the loading icon on the video.

Expected Results:
Videos should stream smoothly and never halt playback in the middle of the video.

Steps to Recreate:
1 Launch browser, go to https://www.youtube.com/watch?v=TNOTBY9tbJI&list=PLkWk0GF3nOGJ0hKmY2ghHx3x4lX0aPKVY  switch playback quality to 1080p 60
2 In new tabs, visit https://maps.google.com/, https://www.flickr.com/explore, https://www.nytimes.com/, and http://us.battle.net/en/
3 Switch back to the video
4 Verify that sometimes the playback stutters, and occasionally will stop all together

NOTE: This is not reproducible 100% of the time.  It was seen once.

Comment 1

[ssimon]

Attachment: fx42_Zito_aboutsupport.txt

Comment 2

[ssimon]

Not sure if this is just related to the hardware not being up to par for 1080p 60fps streaming, but this was also seen on Dragonmaw.  

DxDiag and about:support logs attached.

Comment 3

[ssimon]

Attachment: fx42_Dragonmaw_aboutsupport.txt

Comment 4

[ssimon]

Attachment: fx42_Dragonmaw_DxDiag.txt

Comment 5

[ssimon]

Attachment: fx42_Silvermoon_aboutsupport.txt

This also occurred on Silvermoon.  Playback was stuttering and eventually stopped completely and did not recover.

Comment 6

[ssimon]

Attachment: fx42_Silvermoon_DxDiag.txt

Comment 7

[ssimon]

Attachment: fx42_Nefarian_aboutsupport.txt

Also occurred on Nefarian.  Files attached.

Comment 8

[ssimon]

Attachment: fx42_Nefarian_DxDiag.txt

Comment 9

[ssimon]

Attachment: fx42_Skywall_aboutsupport.txt

Also occurred on Skywall.  Files attached.

Comment 10

[ssimon]

Attachment: fx42_Skywall_DxDiag.txt

Comment 11

[ssimon]

Attachment: fx42_KalEl_aboutsupport.txt

Also seen on Kal El

Comment 12

[ssimon]

Attachment: fx42_KalEl_DxDiag.txt

Comment 13

[ssimon]

Attachment: fx42_Frostwolf_aboutsupport.txt

Also seen on Frostwolf.

Comment 14

[ssimon]

Attachment: fx42_Frostwolf_DxDiag.txt

Comment 15

[ssimon]

Attachment: fx42_Wario_aboutsupport.txt

Also occurred on Wario

Comment 16

[ssimon]

Attachment: fx42_Wario_DxDiag.txt

Comment 17

[Bruce Williams]

Are you sure this is Firefox and not network issues, or is that still to be determined?

Comment 18

[ssimon]

Some systems were able to stream the content, many systems had some buffering issues due to hardware limitations, but the ones included on this bug were the systems that stopped playback and never recovered after several minutes.  I doubt it was a network issue as many systems using the same connection did not have problems.

Comment 19

[u279076]

Milan, could you have someone run through the test on the lab machines in Toronto to see if this is reproducible?

Comment 20

[Trammel May]

Retested. Slight hiccups when opening multiple tabs. Playback does always recover. Seems to be caused by hardware limitations and how browser, at least in this configuration. Tested on Firefox Dev 43.

Comment 21

[Trammel May]

(In reply to Trammel May from comment #20)
> Retested. Slight hiccups when opening multiple tabs. Playback does always
> recover. Seems to be caused by hardware limitations and how browser, at
> least in this configuration. Tested on Firefox Dev 43.

Correct, seems to be caused by hardware limitations and NOT browser.

Comment 22

[u279076]

Anthony, do you still see this as a valid bug report given comment 20?

Comment 23

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

(In reply to Anthony Hughes, QA Mentor (:ashughes) from comment #22)
> Anthony, do you still see this as a valid bug report given comment 20?

I think we can close this bug on the basis that we've fixed a number of the perf issues since this bug was filed.