[FFmpeg-trac] #6734(avfilter:new): vidstabtransform bicubic interpolation issue
FFmpeg
trac at avcodec.org
Mon Dec 17 15:44:12 EET 2018
#6734: vidstabtransform bicubic interpolation issue
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Reporter: oregszun | Owner:
Type: defect | Status: new
Priority: normal | Component: avfilter
Version: git-master | Resolution:
Keywords: libvidstab | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by ablinne):
I have just encountered this exact bug. Those white pixels are probably
due to an integer underflow in the interpolation routine. A bit strange
that this happens, because my source material is in the limited 16-235
luma range. Maybe this should be reported upstream at
https://github.com/georgmartius/vid.stab?. I work around the issue by
compressing the luma range a bit further before applying the filter and
expanding it back afterwards. However, this introduces a little bit of
quantization noise.
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Ticket URL: <https://trac.ffmpeg.org/ticket/6734#comment:2>
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