Closed Bug 1155204 Opened 9 years ago Closed 9 years ago

Sound cut off in short youtube videos(with HTML5 player)

Categories

(Core :: Audio/Video: Playback, defect, P5)

x86
Windows 7
defect

Tracking

()

RESOLVED INVALID

People

(Reporter: kalviskajaks, Unassigned)

References

()

Details

(Whiteboard: [parity-IE])

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150415030206

Steps to reproduce:

1) Open a short few seconds long video on Youtube, which has sound shortly before the end.
2) Make sure the HTML5 player is used
3) Play the video

Example videos 
https://www.youtube.com/watch?v=rh8m2-q71qQ
https://www.youtube.com/watch?v=7LlIKtQwIxI (you can see the mouth still moving while the sounds just disappears)


Actual results:

Video plays fine, but sounds disappears shortly before the end.


Expected results:

Sound should play all the way to the end. Which it does if Flash player is used instead of the HTML5 player.
Component: Untriaged → Video/Audio
Product: Firefox → Core
Happens in Chrome too, so probably a youtube bug not a Firefox one.
Status: UNCONFIRMED → RESOLVED
Closed: 9 years ago
Resolution: --- → INVALID
Ok. Apparently Youtube now serves HTML5 to IE too. And surprisingly IE manages to not cut off the end. Well if IE can do it, why not Firefox. so reopening..?
Status: RESOLVED → UNCONFIRMED
Resolution: INVALID → ---
Whiteboard: [parity-IE]
Version: 40 Branch → unspecified
The end of the audio in https://www.youtube.com/watch?v=rh8m2-q71qQ is cut off for me in IE Edge (and Firefox and Chrome).  I get "A few" in all three.  Same with the other video.

Curiously, if I download the MP4 and WebM versions with youtube-dl, less of the audio is cut off.  I get "A few moments later" (but it cuts mid-"r"), so the actual media is longer and plays fully in VLC, Firefox, and Chrome.  Same with the other video.

So this does look like a YouTube-side issue.  What video and IE version were you seeing complete playback with?
https://www.youtube.com/watch?v=7LlIKtQwIxI

Windows 7, IE 11, i can clearly hear all of "unbearable faggots" where as in Firefox all i hear is "unbearab"
Hitting refresh gives me different amounts of audio each time.
If I disable MSE by setting media.mediasource.enabled to false, I get consistent playback of all audio... could be a timing/buffer appending issue with the MSE player.
Component: Audio/Video → Audio/Video: Playback
Well i just found out the "Magic options" addon causes this. Its "auto replay" option restarts the video before it reaches the end. If i disable it the problem goes away. Other addons which have this option might  be affected too. Anyways, marking this as resolved because its not an Firefox bug.
Status: UNCONFIRMED → RESOLVED
Closed: 9 years ago9 years ago
Resolution: --- → INVALID
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