[FFmpeg-user] zimg colorspace yuv -> rgb possible?
adf.lists at gmail.com
Tue Jan 26 21:45:39 CET 2016
Andy Furniss wrote:
> Carl Eugen Hoyos wrote:
>> Andy Furniss <adf.lists <at> gmail.com> writes:
>>> After reminding my self recently just how bad ffmpeg yuv -> rgb
>>> can look with interlaced
>> Command line, complete, uncut console output and a sample missing.
> It's too soon really I am still thinking about it but until I get
> more time here's commands from bash history the source file and a
> screen of what I get. On left is interlace aware on right is same
> converted as progressive. Zoomed is stationary ball - the moving ball
> shoes that the interlaced scale did it's thing OK = no chroma spill
> between fields unlike the progressive versions on the right.
> png best viewed unscaled = download.
>>> (without using extra flags).
>> Why is this an issue?
> Maybe should be default but needs more investigation.
> ffmpeg -i ~/snooker-short.ts -ss 11.2 -sws_flags
> +accurate_rnd+full_chroma_int -vf scale=interl=1 -vframes 1
> ffmpeg -i ~/snooker-short.ts -ss 11.2 -vf scale=interl=1 -vframes 1
One thing that is curious if I convert to 422 interlace aware no flags
then to rgb it looks better that going straight to rgb. flags will still
make it better on the second conversion.
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