981723 - [B2G][Core][WebRTC] Videos created will be corrupt and unable to be played

Status: RESOLVED INVALID

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

Description

[Roland Kunkel [:RolandK]]

Description:
User cannot record a video and play that video created at http://mozilla.github.io/qa-testcase-data/webapi/mediarecorder/index.html

Repro Steps:
1) Updated buri to v1.4 BuildID: 20140307040203
2) Navigate to http://mozilla.github.io/qa-testcase-data/webapi/mediarecorder/index.html
3) Select camera and microphone
4) Select video/webm as the Mime type
5) Select Setup
6) Enter in a timeslice amount (3000)
7) Record for 10 seconds
8) Select the created blob at the bottom of the screen
9) Observe "Video can't be played because the file is corrupt"

Actual:
"Video can't be played because the file is corrupt" is displayed to the user

Expected:
Ten second video of the media recorded is played

Environmental Variables:
Device: buri 1.4 MOZ
BuildID: 20140307040203
Gaia: 04eb7996543f114133d1367f834a4d88b68c60ac
Gecko: b0e7f63c2138
Version: 30.0a1
Firmware Version: V1.2-device.cfg

Repro frequency: 100%
Link to failed test: https://moztrap.mozilla.org/manage/case/11593/
See attached: screenshot

Comment 1

[Randell Jesup [:jesup] (needinfo me)]

Tried on a desktop linux x64 inbound build; it worked.  Can you save/export the blob and attach it here?

Are there any log messages thrown while recording or playing it back?  I got one assertion in playback:
###!!! ASSERTION: Frame must have non-negative duration.: 'mDuration >= 0', file ../../../content/media/MediaData.cpp, line 84

and a bunch of !stream warnings during record.

Comment 2

[Randell Jesup [:jesup] (needinfo me)]

If I had to make a guess, it would be something like a field size or byte ordering in the container that's different on B2G/Arm and desktop (for writing the WebM).  Just guessing

Comment 3

[Roland Kunkel [:RolandK]]

Attachment: log.txt

Comment 4

[Roland Kunkel [:RolandK]]

Attachment: Error_viewing

Comment 5

[Roland Kunkel [:RolandK]]

Attachment: Error_Saving_message

Comment 6

[Roland Kunkel [:RolandK]]

(In reply to Randell Jesup [:jesup] from comment #1)
> Tried on a desktop linux x64 inbound build; it worked.  Can you save/export
> the blob and attach it here?

I am unable to save blobs created on the Buri device. I've attached a screenshot showing the error message.

> Are there any log messages thrown while recording or playing it back?  I got
> one assertion in playback:
> ###!!! ASSERTION: Frame must have non-negative duration.: 'mDuration >= 0',
> file ../../../content/media/MediaData.cpp, line 84
> 
> and a bunch of !stream warnings during record.

I was able to reproduce the issue while recording the logcat, I've attached it to the bug.

Comment 7

[Jason Smith [:jsmith]]

WebM video recording is only supported on desktop right now, not FxOS. So this is expected to not work right now.

Comment 8

[Rachel Pribble [:rpribble]]

Removing whiteboard tag, incorrect bug edited during test pass. Please disregard.