Opened 4 years ago

Closed 4 years ago

Last modified 4 years ago

#9092 closed defect (invalid)

Video corruption when using zscale on M1 Mac

Reported by: galad Owned by:
Priority: normal Component: avfilter
Version: git-master Keywords: zscale
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Summary of the bug:
How to reproduce:

% ffmpeg -ss 00:30 -i test.mp4 -vf zscale='primaries=bt709:transfer=bt709:matrix=bt709',format='yuv420p' -frames 1 out.png
ffmpeg commit b410b14
built on Xcode 12.3

Reproduced on both FFmpeg 4.3 and FFmpeg git-master

I don't know if this is a FFmpeg issue or a zimg issue, I couldn't reproduce it in zimg test-app, but I don' have access to a M1 Mac anymore so I can't do any further testing.

Link to the issue on zimg tracker: ​https://github.com/sekrit-twc/zimg/issues/135

Screenshot on the wrong output: ​https://user-images.githubusercontent.com/4305519/100336085-06e35280-2fd6-11eb-85cd-fc7ac6a1e92f.png

Attachments (1)

test.mp4​ (2.0 MB ) - added by galad 4 years ago.

Change History (4)

by galad, 4 years ago

Attachment: test.mp4​ added

comment:1 by Carl Eugen Hoyos, 4 years ago

Keywords: zscale added
Resolution: → invalid
Status: new → closed

This issue likely cannot be fixed in FFmpeg.

comment:2 by Balling, 4 years ago

Just for future reference: this is SDR BT.2020 sample. Remember, that BT.2100 defined HDR. Some other samples are available from Turksat 8K satellites.

Version 0, edited 4 years ago by Balling (next)
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