[FFmpeg-user] lagfun misunderstanding?

Paul B Mahol onemda at gmail.com
Sun Mar 29 18:59:55 EEST 2020

On 3/29/20, Michael Koch <astroelectronic at t-online.de> wrote:
> Am 29.03.2020 um 16:35 schrieb Paul B Mahol:
>> On 3/29/20, Michael Koch <astroelectronic at t-online.de> wrote:
>>> Am 29.03.2020 um 15:13 schrieb Zedsquared:
>>>> I do apologise, the example I just posted omitted the planes argument to
>>>> lagfun, here's the command I was using and resulting output
>>>>    ffmpeg -i IMG_1685.MOV -q:v 0 -vcodec h264 -acodec aac -strict -2
>>>> -filter:v
>>>> format=pix_fmts=rgb24,lagfun=decay=0.999:planes=1  greenlagtest2.mp4
>>> I can confirm that it doesn't work as expected. Shouldn't green be
>>> planes=2 ? But that doesn't work either.
>> green is first plane.
> But it doesn't work as expected with planes=1. I have added a green
> rectangle that changes it's position after one second:

It works as expected.

> c:\ffmpeg\ffmpeg -i IMG_1685.MOV -vf "format=rgb24,sendcmd=c='1 drawbox
> x
> 200',drawbox=x=0:w=100:h=100:t=fill:color=green,lagfun=decay=0.99:planes=1"
> -t 5 -y greenlagtest.mp4
> The decaying rectangle should be green, but it is white.

Because your adjusted your filtergraph that way.
Drawbox does not support rgb formats, and i do not care enough to fix that.

> Michael
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