1373033 - SourceBuffer.appendBuffer doesn't work with partial webm/vp8 chunks

Status: RESOLVED INVALID

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

Description

[David Jameson]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.86 Safari/537.36

Steps to reproduce:

- Split a webm/vp8 file recorded with MediaRecorder into multiple chunks.
- Call appendBuffer for each chunk.

Test:

https://www.groupworld.net/gum_record/test3.html


Actual results:

Corrupted video.


Expected results:

Should play back normally. Works fine on Chrome.

Comment 1

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

(In reply to David Jameson from comment #0)
> User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5)
> AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.86 Safari/537.36
> 
> Steps to reproduce:
> 
> - Split a webm/vp8 file recorded with MediaRecorder into multiple chunks.
> - Call appendBuffer for each chunk.

You need to wait for the updateend event before appending the next chunk.

> Should play back normally. Works fine on Chrome.

Doesn't work in Chrome for me.

FWIW, I don't recommend people write your own MSE player. Use Shaka player or the DASH-IF player instead.

Comment 2

[David Jameson]

Sorry, that was just a quick demo to try to demonstrate the bug, and you're correct that it wasn't checking updating. I've fixed that bug, and it's now working perfectly on chrome every time, but still getting corruption in firefox. (The original code we found this bug on was correctly checking the updating flag).

Comment 3

[Jean-Yves Avenard [:jya]]

It still plays better in Firefox than in Chrome. The latest chrome only shows the first frame. It plays two seconds in FF.

chrome://media-internals show that the 2nd segment caused a parsing error: "Append: stream parsing failed. Data size=94346 append_window_start=0 append_window_end=inf"


What exactly is this video duration supposed to be?