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View Full Version : Film video is mostly duplicate frames every 5th but has some random blending


Waddles
9th October 2015, 03:28
Hi,

I've got a progressive 60fps video. Once doing selecteven() you're left with a duplicate frame every 5th, as the video was shot as film. However, scattered throughout those duplicate 5th frames are blends. I've tried my usual deblending methods to clean it up such as SRestore, FixBlendIVTC, and TDecimate, however they do not do much. If the video was interlaced I'd probably be able to bob and strestore it as that always works well for me on interlaced content, however Yadif is useless since it's progressive.

Does anyone have any ideas on how I can restore the video to 23.97 while 1) removing the duplicate 5th frames and 2) removing all or most of the blended frames?

Here's a 7 second clip, seek through it and you'll see ghosting around the hands and heads and such.

https://www.sendspace.com/file/kzgx4a

Sharc
9th October 2015, 08:18
Try
srestore(frate=23.976)
It returns a progressive 23.976 fps stream without duplicates and without blends.

johnmeyer
9th October 2015, 15:36
I assume that was captured either at the ABC site or Netflix. You could try different capture software.

Waddles
10th October 2015, 03:11
@Sharc Although SRestore does help some, there are still traces of blended frames left over. If it's the most that can be done I can settle with that, though.

@johnmeyer it's not a web capture, it is from television - a plain old digital capture, so your suggestion wouldn't apply or do anything to benefit.

johnmeyer
10th October 2015, 03:27
If that is a plain old digital capture, then you need to change the settings on your capture equipment! You should never get anything that bad from a capture from your television. I am saying this because, while you may be able to improve this a little bit, it will never look as good as a properly-done capture. In addition, I am sure that you don't want to have to do this again on your next capture, and the one after that ...

wonkey_monkey
10th October 2015, 10:58
@Sharc Although SRestore does help some, there are still traces of blended frames left over. If it's the most that can be done I can settle with that, though.

A note on srestore: I've found that it requires a certain number of frames to be played in sequence before it settles and does its job properly. If you go hopping around the video looking for problems, you will likely find them - but they may not be there when you play or encode the whole thing in sequence.

creaothceann
10th October 2015, 11:22
frate=23.976

frate=24.0/1.001

Waddles
11th October 2015, 20:28
If that is a plain old digital capture, then you need to change the settings on your capture equipment! You should never get anything that bad from a capture from your television. I am saying this because, while you may be able to improve this a little bit, it will never look as good as a properly-done capture. In addition, I am sure that you don't want to have to do this again on your next capture, and the one after that ...

It's a 1:1 digital capture. Everything else is broadcast OK and can be recorded without this issue, but this particular show, for whatever reason, has the blending you saw. Maybe it's time compression? I'm not really sure. It's not the equipment, it's the broadcast itself.

A note on srestore: I've found that it requires a certain number of frames to be played in sequence before it settles and does its job properly. If you go hopping around the video looking for problems, you will likely find them - but they may not be there when you play or encode the whole thing in sequence.

That explains why I was originally having trouble figuring out the best way to de-blend, the 7 second clip I was testing on wasn't cleaned up well since it was so short. Using Avisynth on the entire video did the trick, so thank you for that tip!

Thanks for the help, everyone.