Can't tell if I have jerky source footage or not

drdread · Post by **drdread** » Sat Mar 19, 2005 1:54 pm

Ok I'm using DVD footage that my friend ripped for me. When I open it in VDubMod, and I press the forward arrow key to move between scenes, the footage is smooth. But when I push the play button, you can sometimes see chopping. It's weird I can't tell whether my source is jerky, cause sometimes if I go back to a scene and watch it again, it will sometimes turn out smooth the 2nd time.

Could it possibly be that my video card is too cruddy or something? Cause I honestly can't tell if my footage is messed, or if I'm exporting things wrong.

In Premiere Pro, I export to HuffYUV, then use VDubMod to compress to XVid. I do this because for some reason in Premiere, when I select it to export to XVid, it crashes every time I go to export my video.

If someone could help me out, I'd be so greatful.

Scintilla · Post by **Scintilla** » Sat Mar 19, 2005 2:19 pm

If you're worried about it, take a small section and compress it to XviD, then try playing that back. If it's smooth, then the HuffYUV should also be fine.

trythil · Post by **trythil** » Sat Mar 19, 2005 2:57 pm

drdread wrote:Ok I'm using DVD footage that my friend ripped for me. When I open it in VDubMod, and I press the forward arrow key to move between scenes, the footage is smooth. But when I push the play button, you can sometimes see chopping. It's weird I can't tell whether my source is jerky, cause sometimes if I go back to a scene and watch it again, it will sometimes turn out smooth the 2nd time.

This is caching in effect. If it's smooth there, then you're fine.

Though Scintilla's method works, too. You can use, say, MJPEG for less processor overhead.

drdread · Post by **drdread** » Sat Mar 19, 2005 3:47 pm

I tried what Scintillia suggested, and it chops just a slight. But I don't get it, when I watch my video sources (not in VDUB), I see no chop whatsoever, or if there is chop it's too small to notice. When I use Vdub the chops are noticeable.

And I don't get why my Premiere crashes if I choose Xvid as the exporting compressor.

drdread · Post by **drdread** » Sat Mar 19, 2005 3:49 pm

Does anyone know of any good codecs to use? I heard PICVIDEO M-JPEG is good, but you have to pay for PicVideo M-JPEG, and I don't exactly have a credit card or anything.

trythil · Post by **trythil** » Sat Mar 19, 2005 4:48 pm

drdread wrote:I tried what Scintillia suggested, and it chops just a slight.

It's probably just XviD in that case. If you did no resizing, you're probably playing back 720x480 XviD video, which most systems still have trouble handling.

drdead wrote: But I don't get it, when I watch my video sources (not in VDUB), I see no chop whatsoever, or if there is chop it's too small to notice. When I use Vdub the chops are noticeable.

What exactly is it that you are watching? The ripped VOBs? An AVISynth script? The output of the AVISynth script recompressed to another codec and file?

And I don't get why my Premiere crashes if I choose Xvid as the exporting compressor. :cry:

XviD and Premiere don't get along -- there's a much more technical explanation out there somewhere, but I've not come across it yet.

Does anyone know of any good codecs to use?

For what purpose?

drdread · Post by **drdread** » Sat Mar 19, 2005 6:23 pm

"It's probably just XviD in that case. If you did no resizing, you're probably playing back 720x480 XviD video, which most systems still have trouble handling."

Nope, no resizing. I'm watching 640 X 480.

"What exactly is it that you are watching? The ripped VOBs? An AVISynth script? The output of the AVISynth script recompressed to another codec and file?"

I'm watching .MKV's that my friend prepared for me.

"For what purpose?"

If Xvid is the possible cause of the choppiness that I'm seeing, is there another codec you recommend to use as a compressor?

trythil · Post by **trythil** » Sat Mar 19, 2005 6:27 pm

drdread wrote:"It's probably just XviD in that case. If you did no resizing, you're probably playing back 720x480 XviD video, which most systems still have trouble handling."

Nope, no resizing. I'm watching 640 X 480.

That's resized, then.

"What exactly is it that you are watching? The ripped VOBs? An AVISynth script? The output of the AVISynth script recompressed to another codec and file?"

I'm watching .MKV's that my friend prepared for me.

They contain XviD data, correct?

If so, you're going to have one hell of a time getting this to work. It's doable but a lot of people don't like doing it.

"For what purpose?"

If Xvid is the possible cause of the choppiness that I'm seeing, is there another codec you recommend to use as a compressor?

For preview purposes only, PICVideo MJPEG is ok. It's easy to decode, and you can use the evaluation version because the watermarks aren't important if you're just previewing.

I wouldn't use those for your final export, though.

drdread · Post by **drdread** » Sat Mar 19, 2005 9:28 pm

"If so, you're going to have one hell of a time getting this to work. It's doable but a lot of people don't like doing it."

But there's still a way right? I tried exporting part of the file to check for choppiness and all that, and it's there alright even though it may be small it's still a little too noticeable for my liking.

drdread · Post by **drdread** » Sat Mar 19, 2005 9:40 pm

Wait, what if I tried this.

I export the clips from Vdub in Xvid, then put it in Premiere, export the video in HuffYUV, and then use Vdub to convert to Xvid again? I just did that I don't see any chopping....or at least I don't think I do. Even if that worked, would I lose a lot of video quality from all the compressing?

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Can't tell if I have jerky source footage or not

Can't tell if I have jerky source footage or not

Re: Can't tell if I have jerky source footage or not