On Wed, Sep 21, 2011 at 05:07:02AM -0700, John wrote:
> i have a many mp4 videos files in sdcard , that video file contains
> different width,height resolution. i want give a single constant
> resolution to that file by code.
Different width:height resolutions (in computer video, NOT necessarily
in TV formats[1]) mean different aspect ratios. If you know enough about
video to know how badly you are going to screw up your video by fscking
around with its aspect ratios, you know enough to know to leave it alone.
You cannot convert 4:3 (fullscreen) to widescreen; you CAN convert
widescreen formats (and there are a few of these) to 4:3, but you have to
do some cropping, either pan & scan or just a direct crop, both of which
are highly annoying even when done by a pro, and I gather you are not a
pro.....
Later,
--jim
[1] In TV, the aspect ratio and resolution have nothing to do
with each other. For example, a typical DVD's resolution
is 720x480, but its aspect ratio may be 4:3, 16:9, etc.
SVCD is 480x480, but again....
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