[FFmpeg-user] (de)-interlacing question

[Toerless Eckert]

On Wed, Nov 23, 2016 at 10:34:39PM +0100, Moritz Barsnick wrote:
> On Wed, Nov 23, 2016 at 19:54:56 +0100, Toerless Eckert wrote:
> > Well, i'd assume they reduce the effective framerate to 25 to get lower
> > bitrate, and they duplicate to get better player compatibility ?
> 
> I don't see which players should have a low compatibility with 25 fps.

Just guessing. Any better theory ?

Player sets screen FPS and monitor can't handle 25 fps...

I have no really persuasive theory.

Toerless

> > > Input #0, hls,applehttp, from 'http://hls.tagesschau.de/i/video/2016/1122/TV-20161122-2026-4701.,webs,websm,webm,webml,webl,webxl,.h264.mp4.csmil/index_5_av.m3u8':
> > 
> > ... Which program do you use for this output ?
> 
> ffmpeg, obviously. :) In this case, I actively used youtube-dl, and it
> passes the HLS playlist URL to ffmpeg (in case of segmented MPEG-TS, I
> believe - they have an internal HLS desegmenter for some other formats).
> 
> (youtube-dl is currenty broken for the new ZDF Mediathek. Bummer.)
> 
> > Aka: Don't see anything that would indicate frame duplication, so
> > all i can do is trust the step by step playback from vlc or mplayer.
> 
> Of course. No actually, if you don't really trust the player (and/or
> its demuxer), but you do trust ffmpeg, you can have ffmpeg dump the
> *actual* decoded input frames to single output images.
> 
> Moritz
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