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using:video_filter_resize [2010/04/16 19:53] j.m |
using:video_filter_resize [2012/11/11 08:51] (current) |
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The aspect ratio is very important for proper resizing. If the source is MPEG-1/2, you can be almost sure that the source aspect ratio is 4:3 or 16:9. AVI files are most commonly 1:1. | The aspect ratio is very important for proper resizing. If the source is MPEG-1/2, you can be almost sure that the source aspect ratio is 4:3 or 16:9. AVI files are most commonly 1:1. | ||
- | So to resize properly a widescreen DVD for example to MPEG-4 AVI (e.g. encoded with XviD), select 16:9 for source and 1:1 for destination. | + | So to resize properly a widescreen DVD for example to MPEG-4 AVI (e.g. encoded with Xvid), select 16:9 for source and 1:1 for destination. |
The framerate is also important. 4:3 MPEG has non square pixels, different for PAL and NTSC. So if you resize before altering the framerate you will end up with a differently sized image. | The framerate is also important. 4:3 MPEG has non square pixels, different for PAL and NTSC. So if you resize before altering the framerate you will end up with a differently sized image. |