Marking a video as telecined is not reflected in the video preview

[Scigrapher (blahblah1234)]

Observed behavior:
If I have a telecined video, marking it as telecined still shows the original frames in the video preview.

Expected behavior:
The video preview should show the inverse-telecined video. It is an input video setting, so it should be applied to the “before” like the rotation input setting is. This makes it possible to verify that the video is being processed correctly.

Repro:
I don’t really have any free, telecined video content to use, but you could probably import video from any NTSC DVD movie (not TV show). If you set the input as telecined and then frame-by-frame advanced through the video, you will see the characteristic interlacing “comb effect” on 2/5 frames due to the 3:2 pulldown.

If you need system info or a log, I can dig them up, but I suspect they shouldn’t be needed.

[a-cli-user]

@Scigrapher

I don’t really have any free, telecined video content to use

FYI - Here’s how you generate a 1 minute hard-telecined test source with FFmpeg, which when you play with a frame-step video player you can easily see the effect of telecine. The test source is useful for testing any inverse-telecine / pullup process.

$ ffmpeg -f 'lavfi' -i "avsynctest=size='hd1080':framerate='ntsc-film':fg='green':samplerate=48000[out][out1]; [out1]format=pix_fmts='yuv420p',telecine=first_field='bottom':pattern='2323'[out1]" -t 60 -codec:v 'libx264' -crf 17 -ac 2 "telecine.mp4"

[kyle.topazlabs]

Having the team take a look at this nad see what is going on.