Avidemux 60>24fps and sound sync

[sassman]

Hi all, thanks for this great forum! I have some content that is 30fps telecined. So there is a 3-2 pattern where the 2's are duplicates. Usually the 2's are interlaced. I am using the Decomb Telecide filter followed by Decomb Decimate n=5 to remove the interlacing artifacts and duplicate frames stepping the frame rate down from 30fps to 24fps. My problem is that the audio always ends up out of sync. I see a filter to change PAL->FILM framerate in the audio section, but in my case I want NTSC->FILM which is not an option. Right? If I just use TDeint and don't try to change the framerate, then the audio stays in sync.

[Inspector.Gadget]

Use TFM + TDecimate, borrowing settings instructions from their Avisynth documentation.

[sassman]

I presume those are avisynth filters? I guess I am going to have to learn how to use it.

[LoRd_MuldeR]

http://avidemux.org/admForum/viewtopic.php?id=4397 ;)

[sassman]

Thanks, I saw that GUI too. Looks nice. I'd rather use linux for these encodes, but it looks like avisynth is a pain to set up with avidemux. Maybe I'll do them in windows until I can get it installed on my Ubuntu box.

[Inspector.Gadget]

For TFM/TDecimate, you don't need Avisynth. They are built into the video filters of Avidemux.

[sassman]

Sorry, I don't see either of those in avidemux. They are in the interlacing filters? Maybe a different name?

[Inspector.Gadget]

Sorry, I forgot. Avidemux used to have TFM/TDecimate (I think) but now uses the Decomb package exclusively. If you leave the strategy set to "3:2 pulldown" you should be OK. Set the field order if you know it.

[LoRd_MuldeR]

Thanks, I saw that GUI too. Looks nice. I'd rather use linux for these encodes, but it looks like avisynth is a pain to set up with avidemux...

No, actually it is quite easy to use. The AVSProxy method was specifically invented to allow Avisynth input for Avidemux on the Linux platform :)

While Avidemux runs as a native Linux process, AVSProxy (and thus Avisynth) can run via Wine. That's required, as there's no native Avisynth for Linux yet.

The AVSProxy GUI may even work under Wine too. I never tested that though. Linux geeks should be able to run AVSProxy from the Bash anyway ;)

Sorry, I forgot. Avidemux used to have TFM/TDecimate (I think) but now uses the Decomb package exclusively.

Maybe one of the filters that got lost when the video filters were moved into plugins ???

[sassman]

I think Avisynth 3.0 now runs natively on linux also, but I couldn't find a binary for my system (amd64). I tried to compile it, but it has dependency on boost-1_33 which I also tried to compile but it also has dependency problems. If I remember right, there were only .debs for 32-bit processor.

[sassman]

BTW, avidemux still has bad audio sync problems with certain transport stream sources. I'm pretty sure it is related to the source video. I'll try avisynth when I get a chance, but I doubt that it will help since the source is somehow messed up. I should just be able to use megui on my windows box huh? Seems a lot easier than trying to get avisynth going in linux.

[LoRd_MuldeR]

I think Avisynth 3.0 now runs natively on linux also, but I couldn't find a binary for my system (amd64). I tried to compile it, but it has dependency on boost-1_33 which I also tried to compile but it also has dependency problems. If I remember right, there were only .debs for 32-bit processor.

The Avisynth 3.0 project is DEAD. Nobody is actively working on it anymore. And, all from that I know, the existing code didn't even reach "Alpha" state.

It's a pity, but that's the way it is...

[sassman]

Good to know. Would have been nice, but... WINE it is then!