Decoding artifacts when seeking within JW Player MPEG-DASH demo's "Wowza VOD" test stream (OS X only?)

RESOLVED INACTIVE

Status

()

Core
Audio/Video: Playback
P3
normal
RESOLVED INACTIVE
3 years ago
15 minutes ago

People

(Reporter: cpeterson, Assigned: jya)

Tracking

unspecified
Unspecified
Mac OS X
Points:
---

Firefox Tracking Flags

(firefox40 disabled, firefox41 disabled, firefox42 affected, firefox43 affected)

Details

(URL)

Attachments

(2 attachments)

(Reporter)

Description

3 years ago
Created attachment 8658458 [details]
screenshot.png

STR:
1. Load http://www.jwplayer.com/innovation/roadmap/mpeg-dash/
2. Click the "Load MPD…" button and select "Wowza VOD", which loads http://wowzaec2demo.streamlock.net/vod/smil:bigbuckbunny.smil/manifest.mpd
3. After the video starts playing for a few seconds, seek to time 1:30 or 2:30
4. If the stream stalls (bug 1202927?), then toggle pause/play to resume.

RESULT:
The video has severe decoding artifacts for a few seconds. Is Firefox seeking between I-frames? See the attached screenshot.

Edge can play the stream. It doesn't have the same decoding artifacts, but playback seems to pause for a longer time than Firefox.

For some reason, neither Chrome nor Safari are able to play the Wowza VOD stream at all. Chrome reports "Error playing file: Unknown playback error".
(Reporter)

Comment 1

3 years ago
Created attachment 8658461 [details]
screenshot-2.png

Screenshot of seeking to time 1:30.
Priority: -- → P2
Maybe works on IE because WMF doesn't need the Init segment and can read inline SPS, while on Mac we (and Chrome and Safari) fail. We should test Firefox on Windows to confirm this.

If so, stream is malformed, and this is an evangelism bug.
Assignee: nobody → jyavenard
(Reporter)

Comment 3

3 years ago
I can only reproduce with Firefox on OS X. Firefox on Windows does not have decoding artifacts (because it is using the same WMF decoder as IE).
OS: Unspecified → Mac OS X
(Reporter)

Comment 4

3 years ago
I contacted Jeroen at JW Player about this bug.
Summary: Decoding artifacts when seeking within JW Player MPEG-DASH demo's "Wowza VOD" test stream → Decoding artifacts when seeking within JW Player MPEG-DASH demo's "Wowza VOD" test stream (OS X only?)
Mass change P2 -> P3
Priority: P2 → P3

Comment 6

15 minutes ago
Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.
Status: NEW → RESOLVED
Last Resolved: 15 minutes ago
Resolution: --- → INACTIVE
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