Carl Eugen Hoyos wrote:
Andy Furniss <adf.lists <at> gmail.com> writes:
ffmpeg -loglevel debug -i snk-420i.y4m -vf scale=interl=1
ffmpeg.png
Do you understand this message to add the missing options?
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/181474/focus=181547
Hmm
I wouldn't be too confident of getting that working, plus the follow
up posts seem to say it's not enough anyway.
Interesting what is said elsewhere in the thread by kierank like -
http://article.gmane.org/gmane.comp.video.ffmpeg.devel/181527
Seems interested in implementing something -
http://article.gmane.org/gmane.comp.video.ffmpeg.devel/181524
and 6 months later it is he that says
13:44:12 < <at> ubitux> so mmh... -vf format=yuv422p will work as expected?
13:44:27 <+kierank> with forced interlaced scaling yes
13:45:41 < <at> ubitux> kierank: -vf scale=interl=1,format=yuv422p ?
13:45:52 <+kierank> ubitux: i believe yes
so did he implement something?
TBH reviewing the many pngs I've made I don't think he did - or it
didn't work!
True that 420 -> 422 is better looking than
420 -> rgb but if I use the sws flags on the latter it actually looks
the same as doing 420 -> 422 first. So I think that full_chroma_int is
able to mask the worst case and by luck starting from 422 does similar.
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