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2 Pass Encoding
If we weren’t paying attention to filesize, only at quality, is second pass encoding really to our advantage? I have a 15 minute slideshow, and obviously, it has no problems fitting on a 4.7 DVD, but since I use select filters and such, render times can be quite high. So I originaly thought of renderring uncompressed avi, and then transferring it, but I fear my HD will die on me haha since I probably don’t have enough space left. So 1/2 pass encoding… what is better in terms of quality? Thanks in advance.
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4 Replies
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Absolutely! My experience has been it’s well worth it if you can afford the time. Generally, 2-pass can be more accurate with compression. File sizes can end up being a smidge smaller and quality a lot higher.
I think the question should be: Is the advantage of 2-pass compression still applicable to an AVI consisting only of stills?
I would expect not if your slide show is cuts only. Transitions, however, will be where the encoding difference would show up… they appear to encoders like motion. It takes more “studying” by the encoder to determine how it can compress the visual changes. If you have an option to “Optimize Stills”, use it.
Hope this is helpful.
– David
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Your hard-drive won’t die, unless it’s a really old or slow hard-drive 😉
On the other hand, 2 pass encoding should help. Will it be noticable? Most likely not.
– Aanarav
Aanarav Sareen
premiere@asvideoproductions.com
https://www.asvideoproductions.com/techtalk -
For movies less than 1 hour, 2 pass is just a waste of time. Even using PCM audio one could go as high as 7800 kbps CBR which is just about as high as anyone should go, so 2 pass has the same peak limits.
The advantage of 2 pass is when the VBR peak bitrate can exceed the CBR rate by a large amount. -
thanks alot guys
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