Re: [FFmpeg-user] Color Channel Expression

2017-08-01 11:13 GMT+02:00 Paul B Mahol : > On 8/1/17, Jon bae wrote: > > 2017-08-01 9:53 GMT+02:00 Paul B Mahol : > > > >> On 8/1/17, Jon bae wrote: > >> > 2017-07-31 22:16 GMT+02:00 Paul B Mahol : > >> > > >> >> On 7/31/17, Jonathan Baecker wrote: > >> >> > > >> >> > > >> >> > 2017-07-31 14:4

Re: [FFmpeg-user] Color Channel Expression

On 8/1/17, Jon bae wrote: > 2017-08-01 9:53 GMT+02:00 Paul B Mahol : > >> On 8/1/17, Jon bae wrote: >> > 2017-07-31 22:16 GMT+02:00 Paul B Mahol : >> > >> >> On 7/31/17, Jonathan Baecker wrote: >> >> > >> >> > >> >> > 2017-07-31 14:41 GMT+02:00 Paul B Mahol > >> > >: >>

Re: [FFmpeg-user] Color Channel Expression

2017-08-01 9:53 GMT+02:00 Paul B Mahol : > On 8/1/17, Jon bae wrote: > > 2017-07-31 22:16 GMT+02:00 Paul B Mahol : > > > >> On 7/31/17, Jonathan Baecker wrote: > >> > > >> > > >> > 2017-07-31 14:41 GMT+02:00 Paul B Mahol >> > >: > >> > > >> > On 7/31/17, Jon bae >>

Re: [FFmpeg-user] Color Channel Expression

> input > red/alpha , green/alpha , blue/alpha > output > ffmpeg -i video.mp4 -i lowerthird.png -filter_complex >[1:v]geq=r=r/a:g=g/a:b=b/a[gq];[0:v][gq]overlay ... > >> output.mp4 > Use ffmpeg -i video.mp4 -i lowerthird.png -filter_complex [1:v]geq=r='p(X,Y)/alpha(X,Y)':g='p(X,Y)/alpha(X,Y)'

Re: [FFmpeg-user] Color Channel Expression

On 8/1/17, Jon bae wrote: > 2017-07-31 22:16 GMT+02:00 Paul B Mahol : > >> On 7/31/17, Jonathan Baecker wrote: >> > >> > >> > 2017-07-31 14:41 GMT+02:00 Paul B Mahol > > >: >> > >> > On 7/31/17, Jon bae > > > >> > wrote: >> > > 2017

Re: [FFmpeg-user] Color Channel Expression

On 7/31/17, Jonathan Baecker wrote: > > > 2017-07-31 14:41 GMT+02:00 Paul B Mahol >: > > On 7/31/17, Jon bae mailto:jonba...@gmail.com>> > wrote: > > 2017-07-31 14:00 GMT+02:00 Paul B Mahol >: > > > >> On 7/31/17, Jon b

Re: [FFmpeg-user] Color Channel Expression

2017-07-31 14:41 GMT+02:00 Paul B Mahol >: On 7/31/17, Jon bae mailto:jonba...@gmail.com>> wrote: > 2017-07-31 14:00 GMT+02:00 Paul B Mahol mailto:one...@gmail.com>>: > >> On 7/31/17, Jon bae mailto:jonba...@gmail.com>> wrote: >> > 2017-07-31 10:3

Re: [FFmpeg-user] Color Channel Expression

On 7/31/17, Jon bae wrote: > 2017-07-31 14:00 GMT+02:00 Paul B Mahol : > >> On 7/31/17, Jon bae wrote: >> > 2017-07-31 10:30 GMT+02:00 Paul B Mahol : >> >> >> >>> >> >>> What exactly you tried? >> >>> >> >>> Perhaps you want premultiply filter? >> >>> >> >>> Yes I have a video and a lower third,

Re: [FFmpeg-user] Color Channel Expression

2017-07-31 14:00 GMT+02:00 Paul B Mahol : > On 7/31/17, Jon bae wrote: > > 2017-07-31 10:30 GMT+02:00 Paul B Mahol : > >> > >>> > >>> What exactly you tried? > >>> > >>> Perhaps you want premultiply filter? > >>> > >>> Yes I have a video and a lower third, and I want to overlay the lower > >> thi

Re: [FFmpeg-user] Color Channel Expression

On 7/31/17, Jon bae wrote: > 2017-07-31 10:30 GMT+02:00 Paul B Mahol : >> >>> >>> What exactly you tried? >>> >>> Perhaps you want premultiply filter? >>> >>> Yes I have a video and a lower third, and I want to overlay the lower >> third. But my alpha channel from the lower third is not pre-devide

Re: [FFmpeg-user] Color Channel Expression

2017-07-31 10:30 GMT+02:00 Paul B Mahol : > >> >> What exactly you tried? >> >> Perhaps you want premultiply filter? >> >> Yes I have a video and a lower third, and I want to overlay the lower > third. But my alpha channel from the lower third is not pre-devided with > the alpha channel, so I need

Re: [FFmpeg-user] Color Channel Expression

2017-07-31 10:30 GMT+02:00 Paul B Mahol : > > What exactly you tried? > > Perhaps you want premultiply filter? > > Yes I have a video and a lower third, and I want to overlay the lower third. But my alpha channel from the lower third is not pre-devided with the alpha channel, so I need to do a ch

Re: [FFmpeg-user] Color Channel Expression

On 7/31/17, Jon bae wrote: > Hello, > is there a way to make simple channel expressions in ffmpeg. > I would need to make something like this: > > input > red/alpha , green/alpha , blue/alpha > output > > I try this with the geq filter, but without success. What exactly you tried? Perhaps you wa

[FFmpeg-user] Color Channel Expression

Hello, is there a way to make simple channel expressions in ffmpeg. I would need to make something like this: input > red/alpha , green/alpha , blue/alpha > output I try this with the geq filter, but without success. Have you an idea, how I can do this? Regards Jonathan