Avisynth error trying to use BlankClip filter

[tcorr]

Hi All,

I'm trying to take material from my set-top recorder and apply some Avisynth filters to it. I demuxed the material with DVD Decrypter and then cut scenes and created my .d2v project with Cuttermaran. The script works fine until I try to add a BlankClip to the mix. I keep getting the following error: "Splice: Video framerate doesn't match"

I've double-checked the framerate in Cuttermaran and it says it's 29.97, so that's what I'm using for my blank-clip, yet the script keeps erroring out.

Any suggestions?

Thanks,
Trevor

LoadPlugin("C:\Program Files\HCEnc\HC021\DGDecode\DGDecode13.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\NicAudio.dll")
video=MPEG2source("C:\demuxed\CSI.d2v")
audio=NicAC3Source("C:\demuxed\CSI.ac3",2)
mov=AudioDub(video,audio)
bc=BlankClip(mov, length=120, width=720, height=480, fps=29.97, color=$000000)
bc+fadeio2(trim(mov,500,1000),20)+fadeio2(trim(mov,1500,2000),20)

[manono]

How about this:

LoadPlugin("C:\Program Files\HCEnc\HC021\DGDecode\DGDecode13.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\NicAudio.dll")
video=MPEG2source("C:\demuxed\CSI.d2v")
audio=NicAC3Source("C:\demuxed\CSI.ac3",2)
video=video.AssumeFPS(29.97)
mov=AudioDub(video,audio)
bc=BlankClip(mov, length=120, width=720, height=480, fps=29.97, color=$000000)
bc+fadeio2(trim(mov,500,1000),20)+fadeio2(trim(mov ,1500,2000),20)

I don't do this kind of work, so I'm not positive that'll fix it. Also, shouldn't you be using Alligned Splice, rather than the Unaligned Splice you're using?

http://avisynth.org/mediawiki/UnalignedSplice

Have you done this kind of thing before?

[jagabo]

29.97 isn't really 29.97. The frame rate in an AVI file is encoded as two integers, a numerator and a denominator. The true NTSC frame rate is 30000/1001 which is 29.9700299700299700... That small difference is probably what's causing the problem. Manono's AssumeFPS(29.97) should fix it.

[tcorr]

Manono's AssumeFPS(29.97) should fix it.

Thanks guys. I will give this a shot tonight and see what happens.

Also, shouldn't you be using Alligned Splice, rather than the Unaligned Splice you're using?

I believe you're correct, Manono. At one point, I was using the alignedsplice (++), but I didn't notice any difference, so I took it out. The clip that I'm using for testing is pretty short, though, so any noticeable sync issues probably wouldn't manifest themselves until I start using the hour-long material. Thanks for the heads-up.

Have you done this kind of thing before?

I've done quite a bit of searching on the forum and printing of suggestions/tips from you and others on these things, but this is my first actual script, so it's taking quite awhile to get it working. I really appreciate the help.

Trevor

[manono]

Your first script, eh? You believe in jumping right into the deep end, don't you? That's not exactly a beginner's script.

Yeah, when I asked if you had done this before, I was wondering if you had had audio synch problems when using scripts like that. But if, as you say, the videos are real short and there's not much of a break between the parts with audio, then you might not notice the difference. It's still a good idea to train yourself right when joining clips with audio and using transitions like fades and dissolves with a blankclip. Good luck.

[tcorr]

Gentlemen,

SUCCESS!!!

Now it's time to start applying all of this to the larger file and see how it turns out. Thanks so much for the help!

Trevor