25 fps - eu bluray

[max_cady]

Hi,

Help would be nice for 25 fps bluray. Some scenes progressive and some are interlaced. Needs help for deinterlacing please.

sampler: https://mega.nz/file/CElXTCyL#DySqXoctTowHze3fGKuJs3Baea9lztycgUJA_I5PjdM

[Selur]

(ignoring the stream flags) both sample look progressive to me

[max_cady]

So it's encoded as progressive without proper deinterlacing?

[Selur]

No, that's not what I wanted to say.
Simply opening that samples while ignoring the interlaced flag. shows that the samples are progressive, there are no combing lines, and from the looks of it simply saved in an interlaced fashion to be Blu-ray compatible. No deinterlacing is needed for those sample since their content looks progressive to me.

[Sharc]

The originals have probably been 25i (interlaced video) and became 50p (progressive) after bob-deinterlacing. Wrongly flagged as interlaced for whatever reason.
Sampler01: The first half (scene with the girl) has plenty of dropped frames. Crap.
Sampler02: Bob-deinterlaced to 50p; noisy and wrongly flagged as interlaced but otherwise ok.

[jagabo]

The videos are encoded interlaced (with separated fields, so the "frame" rate is really the field rate) but the frames themselves are progressive. Just treat them as 25p video.

[davexnet]

Yes, I've seen this before, this seems to work:
lwlibavvideosource("sample01.mkv").assumefps(25)

Perhaps it's worth using Virtualdub to write it out to a losssless intermediate at 25 fps progressive and use that as input to the Blu-ray

[Sharc]

Agree, assumeFPS(25) does the trick.
The jerkyness of the sea scene in sampler01 is "inherited" I think, because it is taken from a non-synchronized (50Hz or 60Hz) TV screen.

(If the final version is supposed to be blu-ray compliant the video has to be encoded or at least flagged as interlaced, because 1920x1080p25 is not blu-ray compliant. Picky players may reject to play it.)