[FFmpeg-user] -vf lutyuv=y=gammaval(0.5) Crashes ffmpeg

Jared Glass jared.glass at triggerfish.co.za
Wed May 23 11:07:32 CEST 2012

Sorry, managed to acheive what I want with
-vf lutrgb='r=gammaval(2):g=gammaval(2):b=gammaval(2)
but this also works and does exactly the same:
-vf lutrgb='y=gammaval(2):u=gammaval(2):v=gammaval(2)

At first I guessed it was because the video format I'm using is using an 
rgb lut as opposed to yuv...but then why when I set y=gamaval etc as 
opposed to r=gamaval does it still work. Do yuv = rgb?

Sorry for being such a noob :P

On 2012/05/23 10:58 AM, Jared Glass wrote:
> Hi there
> The subject line pretty much says it all. That command was taken 
> straight out of the ffmpeg documentation... wierd thing is the command:
> -vf lutrgb='g=0:b=0'
> works perfectly... which is also out of the documentation under the 
> same section.
> Any ideas why this is happening or how the gammaval should be inputted 
> please?

Kind Regards,
Jared Glass <mailto:jared.glass at triggerfish.co.za> | Technical Lead
Triggerfish Animation Studios <http://www.triggerfish.co.za>
Zambezia Movie <http://www.zambeziamovie.com/> | Khumba Movie 

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