1940250 - Aspect ratio (SAR/DAR) is ignored in HEVC video

Status: RESOLVED FIXED

(Core :: Audio/Video: Playback, defect, P2)

Description

[dantmnf2]

Attachment: a_1440x1080_sar_4_3_hevc.mp4

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Steps to reproduce:

Attempt to play an HEVC-encoded video, such as the attached file, or generated by

ffmpeg -f lavfi -i testsrc=s=1920x1080:d=10 -vf scale=1440x1080,setsar=sar=4/3 -pix_fmt yuv420p -c:v libx265 a_1440x1080_sar_4_3_hevc.mp4

Actual results:

The video appears as 4:3, SAR/DAR is ignored.

With AVC-encoded video (replace libx265 with libx264 in the command before), the video correctly shows as 16:9. Seems a bit unrelated to 1868032 .

Expected results:

The video should appear as 16:9.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Alastor Wu [:alwu]]

Attachment: Bug 1940250 - part1 : apply Pixel Aspect Ratio (PAR) on the display size for HEVC.

Comment 3

[Alastor Wu [:alwu]]

Attachment: Bug 1940250 - part2 : add test cases.

Depends on D236056

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/63befe040db3
part1 : apply Pixel Aspect Ratio (PAR) on the display size for HEVC. r=media-playback-reviewers,padenot
https://hg.mozilla.org/integration/autoland/rev/faf2d5460822
part2 : add test cases. r=media-playback-reviewers,padenot

Comment 5

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/63befe040db3
https://hg.mozilla.org/mozilla-central/rev/faf2d5460822

Comment 6

[Timea Zsoldos [:zstimi/tzsoldos], Desktop QA]

I have reproduced this issue using Firefox 136.0a1 (2025.01.07) on Windows 11.
I can confirm this issue is fixed, I verified using Firefox 136.0b2 on Win 11 and on macOS 12, the video has the expected aspect ratio.
On Ubuntu the HEVC video still not playing.