[FFmpeg-user] telecine pattern 5555 - Judder-free, 60 FPS telecine (?)

Ted Park kumowoon1025 at gmail.com
Sun Apr 5 06:52:23 EEST 2020


>> Apart from the telecine process damaging the image...
> Yes, telecine damages the output image.
> I assume you agree that a telecine that produces
> 20% combing @ 12Hz & no cadence (i.e., 5-5-5-5 pull-down in the raw frames)
> is better than
> 40% combing @ 6Hz & 2-3-2-3 cadence (i.e., 4-6-4-6 pull-down by the TV).
>> ...and the deinterlacer permanently ruining it?
> Does a deinterlacer ruin the image? If the picture is progressive and if all the deinterlacer does is deinterlace?
> But it appears that 'bwdif=mode=send_frame' is doing more than deinterlace. It appears to be decombing, even for the 8 of 10 frames that are not combed.

Even if that were true (which I have no idea to be honest) are you sure you’re not assuming a raw uncompressed source and no compression afterwards either?

> Carl Eugen,
> are you a developer or a user? I ask that question innocently because I really don't know.
> I looked at the libavfilter source code. I searched for telecine. Who's name do I see in vf_telecine.c? "Paul B Mahol". I had no idea that Paul was a developer -- why would I?

Maybe not for that filter/file but as someone *trying* to contribute, I can attest to Carl being an active maintainer, his name is hard to miss in the commit history. 

Ted Park

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