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Eduardo Macedo
Repeated keyframes
on Sep 6, 2015 at 8:15:30 am

Hey. I've recorded some footage with Hypercam2 (because that's the only software that records what I need with a Lossless codec), but the video has some repeated keyframes and I need remove it or know how to record without these repeated frames. Any idea?

Some frames repeats for 5 times and I can't delete one by one :/


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John Rofrano
Re: Repeated keyframes
on Sep 6, 2015 at 3:20:23 pm

It sounds like you need to ask this question in the Hypercam2 forums. We would have no idea why it's recording repeated frames and Vegas Pro has no facility to detect repeated frames and remove them automatically. This assumes the repeated frames are i the source file and are not due to frame rate mismatches between your source and your project.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Eduardo Macedo
Re: Repeated keyframes
on Sep 6, 2015 at 4:04:47 pm

Yes, the repeated frames are in the source. That's why I'm asking here. I was wondering if there's any repeated frames detector in Sony Vegas. Or any script... :/


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John Rofrano
Re: Repeated keyframes
on Sep 6, 2015 at 5:07:15 pm

[Eduardo Macedo] "I was wondering if there's any repeated frames detector in Sony Vegas. Or any script... :/"
Not that I know of. Scripts don't have access to the video stream. I wonder if there are any VirtualDub / AviSynth filters that can detect duplicate frames and remove them. That's where I would look.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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Wayne Waag
Re: Repeated keyframes
on Sep 6, 2015 at 6:18:54 pm

John is right, there are avisynth scripts to do this. There is a lot of interest in removing duplicate frames in film restoration. Probably, the one closest to wht you want is Dedup. Here is a link:

http://avisynth.nl/index.php/External_filters#Duplicate_Frame_Detectors

Scroll down to 5.4, Duplicate Frame Detectors. It would require installation of Avisynth and Virtualdub and some time to learn how it works. Good luck.

wwaag


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Eduardo Macedo
Re: Repeated keyframes
on Sep 6, 2015 at 7:34:27 pm
Last Edited By Eduardo Macedo on Sep 6, 2015 at 7:35:16 pm

Thank you so much! I read another info about Null Frames on Lagarith Lossless Codec that gonna help me a lot too!

But, talking about the avisynth script(filters)... My last question is: I'll need to resync the audio or the script cuts the audio part too? Any idea?


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Wayne Waag
Re: Repeated keyframes
on Sep 6, 2015 at 9:08:04 pm

My last question is: I'll need to resync the audio or the script cuts the audio part too? Any idea?

Don't know. In thinking about it, a better solution might be to replace the duplicate frame with one interpolated from the previous and next frames. That way, there would be no audio sync problems. It turned out that I have a such an avisynth script written by John Meyer, although it's for interlaced footage. Here is the original thread on the Doom 9 forum http://forum.doom9.org/showthread.php?p=1493863 where the John Meyer script is posted. Assuming your footage is progressive, there is a link in the thread to the original filter by Mug Funky http://forum.doom9.org/showthread.php?p=753779#post753779 which may be exactly what you need. It would actually be a pretty simple script. Use of these require frameserving out of Vegas and then opening the Avisynth script in Virtualdub and rendering to an intermediate for import back into Vegas. Hopefully, these will be of use to you. Good luck.

wwaag


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