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| Brassplyer |
| Posted: Oct 25 2012, 01:13 AM |
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Newbie
Group: Members
Posts: 7
Member No.: 27478
Joined: 23-April 10
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Using the resize filter, when would you use the option for codec friendly sizing - multiples of 2, 4, 8, 16?
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| dloneranger |
| Posted: Oct 25 2012, 05:20 AM |
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Moderator
Group: Moderators
Posts: 2366
Member No.: 22158
Joined: 26-September 07
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It's more of a safety feature than anything else
A lot of codecs require that the size of videos are multiples of 2, 4, 8 or 16
Also, certain codecs can be more efficient if the sizes are multiples of 8 or 16
You can waste a lot of time if the codec lets you pick a width that won't actually playback properly
XVID encoded videos with an odd width can play back as a slated black and white mess
But that all depends on exactly what codec is decoding the video
Safest choice is 16, but 8 and 4 are usually fine
At minimum, pick 2 as hardly anything works with odd widths
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MultiAdjust JoinWav WavNormalize FFMPeg Input Plugin v1827 UnSharpMask
Windows7/8 Codec Chooser
All FccHandlers Stuff inc. Installers for acm codecs AAC, AC3, LameMp3 |
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| phaeron |
| Posted: Oct 28 2012, 07:56 PM |
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Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
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More applicable is that there are some codecs that simply won't even allow compression and will throw errors if you don't adjust to an appropriate width and height. The adjustment options save you the trouble of setting a percentage, reading off the sizes, and then manually adjusting both the size and cropping options to make the sizes work out without distorting the aspect ratio.
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