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porneyeseeker · 10th March 2012, 13:02

Hi guys ^^ I'm having a new problem with VirtualDUB. Well, it can be simple or not, I don't know, but the problem here is when I try to split my video. For some reason sometimes I can't split with accuracy, for example: I'm trying to split 02:17:24(base) ~ 03:04:27(end) of a video, but the VirtualDUB can't do it! It split around 02:14:xx and not exactly 02:17:24! I can't get it working perfectly. However, when I try to split another timings, it works perfectly. I need to crop it perfectly because I'm working with a fade in/out effect with the vid. Any help?

CallMeHorizon · 10th March 2012, 13:18

Could be codec related, I've had inaccurate split times in different applications when using certain codecs.

Shylock · 10th March 2012, 13:26

Sometimes VirtualDub has a hard time with the synchromization of some audio formats with certain video formats. Try to first convert the video to Xvid with uncompressed audio. That seems to work best for me...

scrub · 10th March 2012, 14:41

check this thread. If you've been working with 'direct stream copy' then DiamondHead's explanations may address it. There's another thread out there about this but couldn't turn it up.

eric586 · 10th March 2012, 17:16

In my experience with Virtualdub, the beginning point of the split can only be at specific keyframes. The end can be anywhere you want it, but the beginning will always revert backwards to the nearest keyframe. That's just how the program works I don't think there's a way around it.

RTechnik · 10th March 2012, 17:36

yeah you have to use keyframes for start, but you could use all frames as end frame, and no , the is not wa around it, the same is with all formats (only mpeg1/2 works differently) so unles you want to reencode there is no way to be presice.

drona · 10th March 2012, 17:59

You will have to re-encode it if you want it to be very specific, otherwise it will revert to the nearest keyframe.

Pad · 11th March 2012, 00:53

Generally speaking VirtualDub will only split on keyframes, however there is a way around this as explained in this post.

Note - you will have to use VirtualDub 1.9.11 which has the "smart rendering" feature. Hope that helps.

RTechnik · 11th March 2012, 05:15

yeah, but you need exactly same encoder as in the video, and that is sometimes problem

Pad · 11th March 2012, 05:54

Quote:

Originally Posted by RTechnik

yeah, but you need exactly same encoder as in the video, and that is sometimes problem

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10th March 2012, 13:02	#1
porneyeseeker V.I.P. Clinically Insane Join Date: Sep 2011 Posts: 2,150 Thanks: 11,074 Thanked 22,787 Times in 2,019 Posts	VirtualDUB can't split BASE timing(AVI) ? Hi guys ^^ I'm having a new problem with VirtualDUB. Well, it can be simple or not, I don't know, but the problem here is when I try to split my video. For some reason sometimes I can't split with accuracy, for example: I'm trying to split 02:17:24(base) ~ 03:04:27(end) of a video, but the VirtualDUB can't do it! It split around 02:14:xx and not exactly 02:17:24! I can't get it working perfectly. However, when I try to split another timings, it works perfectly. I need to crop it perfectly because I'm working with a fade in/out effect with the vid. Any help?

10th March 2012, 13:18	#2
CallMeHorizon Newbie Join Date: Mar 2012 Location: England, UK Posts: 44 Thanks: 320 Thanked 168 Times in 34 Posts	Could be codec related, I've had inaccurate split times in different applications when using certain codecs.

10th March 2012, 13:26	#3
Shylock Registered User Addicted Join Date: Sep 2007 Posts: 133 Thanks: 8 Thanked 180 Times in 84 Posts	Sometimes VirtualDub has a hard time with the synchromization of some audio formats with certain video formats. Try to first convert the video to Xvid with uncompressed audio. That seems to work best for me...

10th March 2012, 14:41	#4
scrub Mobster Clinically Insane Join Date: Aug 2007 Posts: 3,915 Thanks: 24,567 Thanked 31,789 Times in 3,246 Posts	check this thread. If you've been working with 'direct stream copy' then DiamondHead's explanations may address it. There's another thread out there about this but couldn't turn it up.

10th March 2012, 17:16	#5
eric586 Registered User Addicted Join Date: Jan 2008 Location: South Jersey Posts: 445 Thanks: 543 Thanked 5,981 Times in 415 Posts	In my experience with Virtualdub, the beginning point of the split can only be at specific keyframes. The end can be anywhere you want it, but the beginning will always revert backwards to the nearest keyframe. That's just how the program works I don't think there's a way around it.

10th March 2012, 17:36	#6
RTechnik V.I.P. Clinically Insane Join Date: Mar 2009 Location: Czech Republic Posts: 4,238 Thanks: 739 Thanked 32,748 Times in 4,273 Posts	yeah you have to use keyframes for start, but you could use all frames as end frame, and no , the is not wa around it, the same is with all formats (only mpeg1/2 works differently) so unles you want to reencode there is no way to be presice.

10th March 2012, 17:59	#7
drona Registered User Addicted Join Date: Nov 2011 Location: Between my 4th & 5th Beer! Posts: 857 Thanks: 11,162 Thanked 2,360 Times in 695 Posts	You will have to re-encode it if you want it to be very specific, otherwise it will revert to the nearest keyframe.

11th March 2012, 00:53	#8
Pad Fan of Cairy Hunt Postaholic Join Date: Mar 2007 Location: Alice's Restaurant Posts: 5,154 Thanks: 19,782 Thanked 22,959 Times in 4,188 Posts	Generally speaking VirtualDub will only split on keyframes, however there is a way around this as explained in this post. Note - you will have to use VirtualDub 1.9.11 which has the "smart rendering" feature. Hope that helps.

11th March 2012, 05:15	#9
RTechnik V.I.P. Clinically Insane Join Date: Mar 2009 Location: Czech Republic Posts: 4,238 Thanks: 739 Thanked 32,748 Times in 4,273 Posts	yeah, but you need exactly same encoder as in the video, and that is sometimes problem