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Why is Compressor2 Sooooo Sloooow?
I just encoded a 90 minute project to MPEG2 using Compressor. It took 4 1/2 hours on my Dual 2-Gig G5. That’s about double what it used to be on the old Compressor, using VBR. Are others experiencing the same?
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8 Replies
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Hey Chris,
Apparently it’s happening to everyone. I did a 15 minute show last week that took 50 minutes, and encoded the same movie in Compression Master in 17 minutes.
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Optical Flow processing is much higher quality than 2 pass VBR. So it takes longer for the higher quality encodes. I believe you can disable it though, can’t you?
Kevin Monahan
Author – Motion Graphics and Effects in Final Cut Pro
fcpworld.com -
Please explain, Kevin. What is Optical Flow Processing? I was using 2-pass VBR. It took more than twice as long as before, and the quality is no better.
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If you have more than one mac you can setup a render farm with Compressor2. I haven’t upgraded yet, but others can fill you in on how to set it up.
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Hi Chris,
Optical Flow Processing is one of the key features announced with Compressor 2. I don’t have a lot of experience with it, unfortunately.What is Optical Flow Processing? Well, I am not an engineer, but if you do a search on the web, you can find a more exacting explanation. I just did, and it’s very interesting. It’s quite scientific and way over my head to explain in a pinch.
To be very generic, and from what I gathered, Optical Flow is a high quality way of temporal image processing borrowed from Shake.
And that’s gotta be good, unless you don’t have a powerful G5.
As Hector mentioned, you can set up an “encoding farm” with other Macs on your network. I got a chance to try this with a 10 seat Xsan and it was really cool. Encoding speed goes really fast on that baby!
Kevin Monahan
Author – Motion Graphics and Effects in Final Cut Pro
fcpworld.com -
Optical Flow processing plays no part in MPEG2 encoding though……
I was, however, doing some tests with Opical Flow in Compressor 2 and it was like render times of 4h30 for 1 minute of footage. Apple’s got to be pulling our legs with that kind of “speed”.
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP
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Can anyone explain how to set up a render farm for Compressor 2? Can you do something similar with FCP5?
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Can anyone explain how to set up a render farm for Compressor 2? Can you do something similar with FCP5?
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