Closed Bug 496714 Opened 16 years ago Closed 16 years ago

Firefox ignores display aspect ratio specified in video headers

Categories

(Core :: Audio/Video, defect)

Product:
Core
Component:
Audio/Video
Platform:
x86
Linux
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 480058

People

(Reporter: denver, Unassigned)

References

(
URL
)

Details

User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b4pre) Gecko/20090401 Ubuntu/9.04 (jaunty) Shiretoko/3.5b4pre Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b4pre) Gecko/20090401 Ubuntu/9.04 (jaunty) Shiretoko/3.5b4pre Firefox seems to assume that the pixel aspect ratio is always 1:1, ie. that the pixel width by height is equal to the display aspect ratio, even when the video header specifies otherwise by defining a different display aspect ratio. The example video contains 720x540 pixels but specifies its aspect ratio is 16:9 in the header. This should cause Firefox to scale the video to 960x540 but instead Firefox displays it at 720x540. Reproducible: Always Steps to Reproduce: 1. Load the example video (http://ossguy.com/sc09/ossguy-sc09-720x540.ogv) in Firefox 3.5 Actual Results: The video is skewed (displayed at 720x540). Expected Results: The video is scaled to 16:9 (960x540) as specified in the video's header. VLC, mplayer, and Totem all correctly scale the video to 16:9. You can verify this by downloading the example video and opening it in these players. This problem is also present in the following video, a larger version of the example: http://ossguy.com/sc09/ossguy-sc09-1440x1080.ogv For more information about this video, see http://ossguy.com/?p=365 . Note that the JVC video camera which recorded the video uses a 4:3 pixel aspect ratio (ie. it uses 1440x1080 pixels to store 1080p video at a 16:9 display aspect ratio), which is why the resulting Theora files have that property. Since many HD video cameras use 1440x1080 for 16:9 1080p video, fixing this should be a priority. For more on pixel aspect ratios, see http://en.wikipedia.org/wiki/Pixel_aspect_ratio .
Component: General → Video/Audio
Product: Firefox → Core
Version: unspecified → Trunk
bug 480058 ? That's already fixed in the latest Firefox3.5 Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1pre) Gecko/20090606 Shiretoko/3.5pre
QA Contact: general → video.audio
Yes, you're right. I've confirmed that it's fixed in a 20090612 daily build for Ubuntu 9.04.
Status: UNCONFIRMED → RESOLVED
Closed: 16 years ago
Resolution: --- → DUPLICATE
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