Closed Bug 566987 Opened 12 years ago Closed 11 years ago
Prince of Persia Film Trailer shows artifacts when playing it back with video tag and webm!
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.3a4webm) Gecko/20100518 MozillaDeveloperPreview/3.7a4webm Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.3a4webm) Gecko/20100518 MozillaDeveloperPreview/3.7a4webm I noticed some artifacts in the prince of persia film trailer at second 23. They don't appear if I playback the video using flash but do occur if I watch the video encoded as webm. Reproducible: Always
I uploaded the wrong file as attachment 446354 [details].
Attachment #446354 - Attachment is obsolete: true
I see this in Firefox (there are artifacts earlier in the panning scene, too) but not in my slightly old WebM-enabled Chromium build.
Status: UNCONFIRMED → NEW
Ever confirmed: true
So, this is caused by Tim's robustness patch (mv-bounds-check.patch) that we've applied to our copy of the decoder. With the patch reverted the video plays without artifacts.
I posted a modified version of the patch which fixes this in the short term, but is not really a suitable long-term solution (as it relies on current encoder behavior and would do ugly things to the format if standardized) to the following thread: https://groups.google.com/a/webmproject.org/group/codec-devel/browse_thread/thread/ff90bd82d0369b96# The discussion there over the correct long-term solution is ongoing.
We've included Tim's patch in the WebM landing, in bug 566247.
Status: NEW → RESOLVED
Closed: 11 years ago
Resolution: --- → FIXED
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