Custom Framerate

lordbelial · 1st October 2002, 18:20

Im trying to convert Dave Chapelle - Killing them Softly HBO Special. I have a Divx copy I downloaded and its 14.993fps. When I convert it it changes it to 23 fps and the video speeds up past the audio. Is there any way to force DVD2SVCD to encode the video at the original 14.993 fps?

UltimateDBZ · 1st October 2002, 21:29

Even if there is a way (which I don't believe there is), you aren't going to like the output as it won't work in your DVD player, and most likely not in anything else.

hoozdapimp · 2nd October 2002, 08:42

aren't there programs out there (vdub?) that will change the framerate of the video? once this is done you can remux the new video with the old audio in virtual dub also and then use that avi file as the input for avi2svcd.

markrb · 2nd October 2002, 15:44

I am no expert on this, but I hope I can shed some light.

There is a line inserted into the Avisynth file (that you can edit out, but I don't know the consequences of doing this) that says:
assumefps(23.976) for NTSC and (25) for pal.

Also the encoders (audio and video) are setup for standard framerates.

Since the goal of this program is to make the video work on a TV it must have the proper framrate or will look horrible.

I honestly don't think you can make a non standard framerate video with DVD2SVCD.

Mark

lordbelial · 2nd October 2002, 15:44

VirtualDub will change the video frame rate but since it has to add so many more frames the video looks sped up enormously. If anyone knows how to convert 15fps to 23fps wothout that happening please msg me.

markrb · 2nd October 2002, 22:40

I just looked and in TMPG you can encode at many different frame rates. I don't know how well it will work, but give it a try if your goal is to watch it on the computer.

If it's just an issue with the audio there are programs that will stretch it. It will affect the pitch though.

Mark

markrb · 5th October 2002, 20:57

Not to try and get on your bad side, but that wouldn't do anything for the audio, would it?
Wouldn't the audio still be out of sync since the framrates will be different or is there a normalization of framerates in BeSweet?

Mark

wmansir · 5th October 2002, 21:48

Since it was an HBO TV show it was probably 29.97fps to begin with, so perhaps it would be better to use that framerate.
Try:

ChangeFPS(29.97)

This will duplicate frames to reach the desired framerate, it will not affect audio sync. You could try it with 23.976, but you will probably get jerky playback.

Boulder · 6th October 2002, 11:05

Quote:

Originally posted by markrb

If it's just an issue with the audio there are programs that will stretch it. It will affect the pitch though.

Just one for the future:

GoldWave has an option to stretch the audio without affecting the pitch, I just don't know how it would work with such a big increase in the audio length.

1st October 2002, 18:20	#1 \| Link
lordbelial Registered User Join Date: Apr 2002 Posts: 42	Custom Framerate Im trying to convert Dave Chapelle - Killing them Softly HBO Special. I have a Divx copy I downloaded and its 14.993fps. When I convert it it changes it to 23 fps and the video speeds up past the audio. Is there any way to force DVD2SVCD to encode the video at the original 14.993 fps? __________________ P4 3.0Ghz w/ HT 1.5Gb PC3200 DDR Ram GeForce3 Ti 500 ---------------------------------------- Why do they show anti-piracy commercials in a movie theatre? Kinda defeats the point.

1st October 2002, 21:29	#2 \| Link
UltimateDBZ Registered User Join Date: Jun 2002 Location: There. Posts: 878	Even if there is a way (which I don't believe there is), you aren't going to like the output as it won't work in your DVD player, and most likely not in anything else. __________________ WebMaster: DBZCenter.com IRC: #anime-xtreme @ irc.mircx.com

2nd October 2002, 15:44	#4 \| Link
markrb Old fart Join Date: Oct 2001 Posts: 3,589	I am no expert on this, but I hope I can shed some light. There is a line inserted into the Avisynth file (that you can edit out, but I don't know the consequences of doing this) that says: assumefps(23.976) for NTSC and (25) for pal. Also the encoders (audio and video) are setup for standard framerates. Since the goal of this program is to make the video work on a TV it must have the proper framrate or will look horrible. I honestly don't think you can make a non standard framerate video with DVD2SVCD. Mark __________________ Oh no Mr. Bill!

2nd October 2002, 15:44	#5 \| Link
lordbelial Registered User Join Date: Apr 2002 Posts: 42	VirtualDub will change the video frame rate but since it has to add so many more frames the video looks sped up enormously. If anyone knows how to convert 15fps to 23fps wothout that happening please msg me. __________________ P4 3.0Ghz w/ HT 1.5Gb PC3200 DDR Ram GeForce3 Ti 500 ---------------------------------------- Why do they show anti-piracy commercials in a movie theatre? Kinda defeats the point.

2nd October 2002, 22:40	#6 \| Link
markrb Old fart Join Date: Oct 2001 Posts: 3,589	I just looked and in TMPG you can encode at many different frame rates. I don't know how well it will work, but give it a try if your goal is to watch it on the computer. If it's just an issue with the audio there are programs that will stretch it. It will affect the pitch though. Mark __________________ Oh no Mr. Bill! Last edited by markrb; 3rd October 2002 at 15:58.

2nd October 2002, 08:42	#3 \| Link
hoozdapimp lost in space Join Date: Jul 2002 Posts: 558	aren't there programs out there (vdub?) that will change the framerate of the video? once this is done you can remux the new video with the old audio in virtual dub also and then use that avi file as the input for avi2svcd.

5th October 2002, 20:57	#7 \| Link
markrb Old fart Join Date: Oct 2001 Posts: 3,589	Not to try and get on your bad side, but that wouldn't do anything for the audio, would it? Wouldn't the audio still be out of sync since the framrates will be different or is there a normalization of framerates in BeSweet? Mark __________________ Oh no Mr. Bill!

5th October 2002, 21:48	#8 \| Link
wmansir Moderator Join Date: Oct 2001 Location: USA Posts: 1,919	Since it was an HBO TV show it was probably 29.97fps to begin with, so perhaps it would be better to use that framerate. Try: ChangeFPS(29.97) This will duplicate frames to reach the desired framerate, it will not affect audio sync. You could try it with 23.976, but you will probably get jerky playback.