[FFmpeg-user] Video filtering for chroma dot crawl and rainbow effect

[Andy Furniss]

Carl Eugen Hoyos wrote:
> Christian Johannesen <chrisjohannesen <at> gmail.com> writes:
>
>> ffmpeg.exe  -r 30000/1001 -i D:\media\test_720x486i_dotcrawl.mov
>
> Please remove the input option -r unless you know exactly what you
> are doing.
>
>> -filter_complex [0:0]crop=704:480:8:6,pullup

Input on ticket is 4:2:0 and you can't crop vertically interlaced 4:2:0
by 6 without messing up the chroma. AFAIK you need to crop 4 lines at a
time.

Maybe you could crop 6 if you converted (interlace aware) to 4:2:2 crop
and then interlace aware back to 4:2:0 (untested!).