[FFmpeg-trac] #7978(undetermined:closed): inaccurate conversion from YCbCr Narrow range to RGB Full range
FFmpeg
trac at avcodec.org
Tue Aug 31 05:22:32 EEST 2021
#7978: inaccurate conversion from YCbCr Narrow range to RGB Full range
-------------------------------------+-------------------------------------
Reporter: cepesh | Owner: (none)
Type: defect | Status: closed
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution: invalid
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Changes (by Balling):
* status: new => closed
* resolution: => invalid
Comment:
As was said downstream this is not a bug. https://github.com/sekrit-
twc/zimg/issues/109
{{{
found that you must add 'format=gbrp16le' after 'zscale'. Otherwise,
FFmpeg instructs z.lib to perform a no-op conversion from YUV to YUV, and
instead uses its internal code to convert to RGB. After I did this, I
verified that I got '38004' when converting from '572'. This bug(?) exists
in FFmpeg, not z.lib.
}}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/7978#comment:4>
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