Hot answers tagged codecs
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In many instances you can use ffmpeg to create a clip out of a longer clip, and request that the original frames are copied instead of re-encoded.
I'm writing this from memory so you may want to double check, but I believe the command line options you need to use for this are:
ffmpeg -i <source-filename> -vcodec copy -acodec copy -ss ...
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QuickTime Pro 7 does this, as long as the media is inside a QuickTime (.mov) container.
If I understand how it works correctly, it's because the player is able to play back the source material in a large number of ways (on the fly). You could have multiple clips on the screen with different geometric properties, multiple audio tracks, cuts, etc--and the ...
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From the perceptual front (in the user point of view):
Quality:
Here we are evaluating quality of video and audio being streamed. Usually, higher the bit rate better the quality - but it also means more cost. The basic quality measure for Video is PSNR. However, more relevant matrices from the perceptual quality is blockiness and there are many other ...
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