[FFmpeg-user] (de)-interlacing question

[Moritz Barsnick]

On Wed, Nov 23, 2016 at 02:20:13 +0100, Toerless Eckert wrote:
> Yepp. Checked a new recording, and the H264 HD TS from Astra is
> 720p50 with actual 50 frames,

As mentioned, a lot of over-the-air programming has duplicated frames.
(Additionally, even nowadays, some newly produced material still looks
upscaled from SD.)

> the mediaportal H264 mp4 file is 720p50 but actually 720p25 with
> duplicated frames,

I never noticed that. :-/ (Why would they duplicate them?) I don't have
any "true 50 fps" show to check right now. A random ARD Mediathek
archive file (yesterday's Tagesschau) shows this:

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':
  Duration: 00:15:34.44, start: 0.100667, bitrate: 0 kb/s
  Program 0
    Metadata:
      variant_bitrate : 0
    Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Metadata:
      variant_bitrate : 0
    Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
    Metadata:
      variant_bitrate : 0
    Stream #0:2: Data: timed_id3 (ID3  / 0x20334449)
    Metadata:
      variant_bitrate : 0

> and the MPEG2 SD TS from Astra is 720i50.

576i50 I assume.

Moritz