How to compress a 16:9 avi movie to 4:3 without an gequtschtes building to have the most players (eg: YouTube) to play the movie properly?
Antwort von tommyb:
In the example it to 640x352 pixels and then scaled the top and bottom black bars added. Then the picture is 640x480 and is called letterbox.
Antwort von Debonnaire:
"tommyb" wrote:
In the example it to 640x352 pixels and then scaled the top and bottom black bars added. Then the picture is 640x480 and is called letterbox.
How comest thou to so ne exotic dimension? Why not at 720x405 pixels, so that you have at least all the image pixels as close as possible s.ihrem (PAL) Original exploits?
And how come you have to 640x352 pixels? 16:9 For you have to at a width of 640 pixels a Height of 360 pixels have!
Antwort von tommyb:
Quote:
How comest thou to so ne exotic dimension?
Exotic? This is exotic:
Quote:
Why not at 720x405 pixels
The goal is YouTube. YouTube videos are used with a Resolutionvon 320x240 pixels. Theoretically, it is the source video upload synonymous with 320x240, but due to the higher resolution if possible artifacts of the intermediate codecs in YouTube's internal Skaliervorgang "disappear".
Quote:
And how come you have to 640x352 pixels? 16:9 For you have to at a width of 640 pixels a Height of 360 pixels have!
640x352 is a sg mod16 Resolutionund has the wonderful advantage of the best codec to compress them.
640x360 resolution is not mod16. 360 divided by 16 and thus would be a small loss of coding efficiency of the codecs available.
More information here: http://encodingwissen.de/spezial/mod-regeln.html
A Resolutionvon 720x405 is considerably far away from the optimum. Neither is the 405 mod16 nor does it have a number grade.
Antwort von Debonnaire:
@ tommyb: Thanks for the comments and the link! As I have learned something! :-)
