Video editing stuff

[Ian C]

I'm getting really annoyed by this EVE Online vid I'm trying to put together. I'm using Editstudio v5, and I'm creating MPEG2 vids from it. I have a part one and a part two as it's a complex vid that's 8min 34s in total.

 

Part one, 5ish mins long, builds as an MPEG2 perfectly, and my machine plays it fine. I can chop around the video in mediaplayer, pause it, move to a different position, play it, everything stays in sync just fine.

 

Part two, 3ish mins long, is gammy. The sound gets ahead of the video. It can happen slowly as you watch it or if you chop around from point to point in mediaplayer it can happen fast, sometimes 5+ seconds out of sync but always the sound is ahead of the video. Chop around enough and it'll start chugging with the video and eventually it'll be reduced to only showing keyframes. Part one absolutely does not do this and yet the video clips are from the same source, put together in the same package, and built into MPEG2 the same way

 

I've tried multiple times to get the second one to work, but it won't - same problem every time. The first part always build OK. If I copy and paste the second part in EditStudio onto the end of the first part and build it as one big movie, THEN the first part can go out of sync... So something in the second part is shafting the first!

 

To make matters worse and even more boggleworthy the second part plays FINE on my housemate's PC. Doesn't miss a beat

 

I've just put on Mediaplayer 10, same as he has got and yet my part 2 is still shagged. Is it a bad codec on my PC? Can anyone tell me where a free MPEG2 codec lurks for me to try?

 

-Ian

[Doughie]

ian

 

try posting on one these editing forums :

http://www.dvinfo.net/conf/forumdisplay.php?f=105

 

lots of clever chappies on there.

[Darren-K]

sounds like maybe your Pc is struggling with the amount of content,

it has to hold the video and audio in Ram or something to be able to stream it,or even to preview.,

hence later on,as the video progresses your computers running out of steam so its affecting sync

 

 

 

i think.

[Ian C]

Nah, it's beefy enough I assure you and it's the shorter one of the two it messes up with.

 

I got rid of an old MPEG2 codec and went back to a Cyberlink PowerDVD one that was waiting in the wings to take over and it stays in sync now Takes a few seconds to play again if I chop about but I can live with that - means other people can watch the vid and it doesn't look shit now

 

Thanks for reading my missive, I've decided I hate video codecs like I used to hate printers.

 

-Ian

[Pete]

Was just about to say it sounds like a codec issue....and it was!

[Ian C]

I just found it odd that the 5min video complied and played fine, and yet the 3 min one went wrong every time

 

Codecs are like women

 

-Ian

[Jake]

Was just about to say it sounds like a codec issue....and it was!

of course you were!

 

 

 

 

 

 

[Thorin]

yeah codec issue, the 5min clip was possibly VBR (variable bit rate) audio encoding, can compress and sound a bit better than constant bit rate but is a bitch if you want to chop and change the video.

 

VirtualDub is an excellent free video editing tool by the way but I believe still has issues with VBR audio (most editing apps do). VirtualDubMod is the same but with a few extra bits, mainly VBR audio support.