[FFmpeg-trac] #9497(undetermined:closed): ffmpeg reports wrong display aspect ratio (DAR) for matroska files.
FFmpeg
trac at avcodec.org
Sat Nov 6 08:27:31 EET 2021
#9497: ffmpeg reports wrong display aspect ratio (DAR) for matroska files.
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Reporter: Rikitiki | Owner: (none)
Type: defect | Status: closed
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution: wontfix
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by Gyan):
* status: new => closed
* resolution: => wontfix
Comment:
Matroska stores
[https://www.matroska.org/technical/elements.html#DisplayWidth
DisplayWidth and DisplayHeight]. ffmpeg stores Sample Aspect Ratio in its
internal contexts. The former is the effective ratio of the displayed
dimensions. The latter is the 'scale factor' to be applied to the decoder
output for processing or display purposes. When converting the former to
SAR, rounding may occur. Which in turn, may lead to a slightly different
DAR computed by ffmpeg.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9497#comment:1>
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