Remove the pulldown from a 720:480i or not?!

[meimeiriver]

Hi.

I am trying to decide whether I should remove the pulldown from a 720:480i source (with tsMuxer), or to just let QTGMC use the source directly (and effectively double the frame-rate). I'd like to do the former, but am I going to miss out on frames like that?!

Thanks.

[LigH.de]

When your source is telecined (3:2 pulldown), NEVER USE QTGMC. Telecine is not interlacing with double field rate. If you have a Telecine result for NTSC, it is based on progressive Film, therefore it can get reverted by IVTC (Inverse Telecine). Instead, QTGMC (like any deinterlacer or bobber) expects fieldwise recorded video.

[Skiller]

If it's a hybrid though you might want to use QTGMC, encode at 59.94p and be done with it.

[hello_hello]

Not that I've used TSMuxer much, but "remove pulldown with TSMuxer" sounds a lot like removing the pulldown flags when remuxing so you're left with the original progressive frames. Well.... I guess that'd mean you have the original progressive frames already.... with pulldown flags used for conversion to NTSC on playback. If that's the case, can't you just ignore the pulldown flags and re-encode the progressive video?

I'd agree with not using QTGMC for telecined video, but sometimes for hybrid video it's easiest to just let QTGMC de-interlace and output double frame rate. It might depend what percentage is interlaced and what's film, but if it's all telecined, you'd want to re-encode the original progressive frames, and if it's hard telecined, use TIVTC to recover those progressive frames. Something like:

LoadPlugin("C:\Program Files\avisynth_plugins\TIVTC.dll")
tfm(order=-1).tdecimate()

[meimeiriver]

Okay, thx guys!

[meimeiriver]

Not that I've used TSMuxer much, but "remove pulldown with TSMuxer" sounds a lot like removing the pulldown flags when remuxing so you're left with the original progressive frames. Well.... I guess that'd mean you have the original progressive frames already.... with pulldown flags used for conversion to NTSC on playback. If that's the case, can't you just ignore the pulldown flags and re-encode the progressive video?

Yeah, that's what tsMuxer does: it just removes the pulldown flags. Reading up on it, yesterday, I guess I got a wee confused along the line, thinking the pulldown removal meant skipping a few frames now and then. Thx for the detailed clarification!

[manono]

If it's interlaced there are no 3:2 pulldown flags to remove.