#11448: "swscale" ignores "param0"/"param1"?
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Reporter: b7j6abhi3q | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: swscale
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 1 |
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Comment (by b7j6abhi3q):
I should have mentioned the same command works in 7.1, more detailed
example in which case the difference is also visually obvious if output to
file:
ffmpeg version n7.1-184-gdc07f98934-20250206
{{{
% ffmpeg -i carphone_qcif.y4m -vf scale=1440:1080:flags=bicubic,setsar=1
-f hash -
SHA256=f8d1a22960bd14de8933cdd55995dbfe553ab0d3e7fde78c307e7bd92b08f60c
% ffmpeg -i carphone_qcif.y4m -vf
scale=1440:1080:flags=bicubic:param0=1:param1=0,setsar=1 -f hash -
SHA256=6556d0e7f59dde9d7c73ff2f9632bfbc388806f0022146a994ea24852b01506
% ffmpeg -i carphone_qcif.y4m -vf
scale=1440:1080:flags=bicubic:param0=0:param1=0,setsar=1 -f hash -
SHA256=90261f5618ceba055a46a5e6d18c422d36802576df554795816819e31ab3affb
}}}
ffmpeg version N-118431-g6da82b4485-20250206
{{{
% ffmpeg -i carphone_qcif.y4m -vf scale=1440:1080:flags=bicubic,setsar=1
-f hash -
SHA256=f8d1a22960bd14de8933cdd55995dbfe553ab0d3e7fde78c307e7bd92b08f60c
% ffmpeg -i carphone_qcif.y4m -vf
scale=1440:1080:flags=bicubic:param0=1:param1=0,setsar=1 -f hash -
SHA256=f8d1a22960bd14de8933cdd55995dbfe553ab0d3e7fde78c307e7bd92b08f60c
% ffmpeg -i carphone_qcif.y4m -vf
scale=1440:1080:flags=bicubic:param0=0:param1=0,setsar=1 -f hash -
SHA256=f8d1a22960bd14de8933cdd55995dbfe553ab0d3e7fde78c307e7bd92b08f60c
}}}
sample from https://media.xiph.org/video/derf/y4m/carphone_qcif.y4m
The problem occurred with every input video that I tested and also with
the lanczos filter.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11448#comment:4>
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