[FFmpeg-user] Converting for YouTube

Randy Kramer rhkramer at gmail.com
Mon Aug 22 14:53:49 CEST 2011



Randy Kramer

On Sunday 21 August 2011 07:08:53 am bouke wrote:
> Several tools around to get the video from youtube in it's orignal form.
> Do a google search on 'rip youtube'
> a Matte is a key signal. Normally black and white.
> A Difference matte is comparing two streams by subtracting each pixel's
> value.
> If the pixels are the same, the result is of course pure black.
> So it generates a stream where differences between the two streams is shown
> in a black and white image,
> used for special effects, or, in this case, quality control.
> Probably there is an Avisynth filter, but most NLE's / special fx packages
> have something like that.
> (after effects for sure).
> So it depends on the tools you have....

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