986925 - MP3 in MP4-container not being played with DirectShow-backend

Status: RESOLVED DUPLICATE of bug 986947

(Core :: Audio/Video, defect)

Description

[Elbart]

Attachment: vbr.mp3.mp4

When playing a MP4-videofile with a MP3-audio-track, the browser refuses to play it at all on at least Windows 7 with the error: "Video can't be played because the file is corrupt."

When switching media.directshow.enabled to false, the video is being played.

Playing the MP3-stream on its own is working fine.

Mozilla-documentation states that MP3 in MP4 is supported on Windows 7 and others.
https://developer.mozilla.org/en-US/docs/HTML/Supported_media_formats#Browser_compatibility

---
Testfiles:
MP3: http://mxr.mozilla.org/mozilla-central/source/content/media/test/vbr.mp3
MP3 in MP4: See attachment.

---
Affected versions:

Firefox 28 and Nightly 2014-03-22 on (at least?) Windows 7

Not affected versions:
Firefox ESR 24.4.0 and Firefox 27 on (at least?) Windows 7

---
STR:
Open files in Firefox

ER:
Both the MP3 and MP4 should play within the browser.

AR:
The MP3 plays, the MP4 shows an error.
Browser console has this entry:
"Media resource file:///C:/Users/user/Desktop/vbr.mp3.mp4 could not be decoded. vbr.mp3.mp4"

---
Regressions:
First regression by bug 861693

m-c 
Last good revision: c146d402a55f (2013-08-13)
First bad revision: 3c61cc01a3b1 (2013-08-14)
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c146d402a55f&tochange=3c61cc01a3b1


Then fixed by bug 930372

m-c
Last good revision: 19fd3388c372 (2013-10-24)
First bad revision: 9f8233fcce1d (2013-10-25)
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=19fd3388c372&tochange=9f8233fcce1d

m-i
Last good revision: 5775bf2165d2
First bad revision: 0d86150342ca
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=5775bf2165d2&tochange=0d86150342ca


And finally regressed again by bug 945947

m-c
Last good revision: 8648aa476eef (2013-12-03)
First bad revision: 9688476c1544 (2013-12-04)
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8648aa476eef&tochange=9688476c1544

m-i
Last good revision: b96d513cd89f
First bad revision: ccb5e249ab11
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=b96d513cd89f&tochange=ccb5e249ab11

Comment 1

[Elbart]

Fixed as of bug 986947 comment 4