VBR issue in Compressor
by Gary on Feb 16, 2006 at 2:35:28 am
I have a client who gave me a bunch of bumps and ID's to do for a rather well-, ahem, known restaurant chain. One of the ID's they shot is the brand spinning very very fast-like speed drill fast.
I'm getting really poor compression quality (lots of horizontal shift)as the logo spins in VBR 2-pass. Am I out of luck trying to use Compressor2 for this? I have tried several bit rates to no avail. Any suggestions?
Re: VBR issue in Compressor by Gary on Feb 16, 2006 at 5:32:56 pm
With this much motion (speed drill)it's a complex encode. Yes, I tried CBR at various incremental bitrates (I find CBR best works well for most media I encode)and the result was a lot of horizontal shift across the screen fields. It's just too fast a piece of media.
Oddly enough, I let DVDSP encode the track and the result was much better; only a very slight shift at the head-almost undetectable. I've used Media Cleaner Pro for years and I have a pretty good feel for the necessity of a 2-pass VBR and this would seem a likely candidate.
Thanks for the suggestion. I'll tweak CBR around a bit and see what happens.
Re: VBR issue in Compressor by llll--Kia on Feb 21, 2006 at 11:23:01 am
I would reccomend you try and play the original media through a video monitor to isolate the problem. Like you say it could just be that the movment of the logo is too fast, if so it will be apparent when you play the clip through a monitor. Otherwise you know it's an encoding issue, try making the GOP size smaller i.e more i-frames per sec.