[FFmpeg-user] sendcmd and overlay

Paul B Mahol onemda at gmail.com
Sat Feb 1 23:35:24 EET 2020


On 2/1/20, Michael Koch <astroelectronic at t-online.de> wrote:
>
>>>> Console output:
>>>>
>>>> F:\Test>c:\ffmpeg\ffmpeg -i main.mov -i lp.mp4 -filter_complex "[1
>>>> ]scale=100:100,sendcmd=f=test.cmd[2];[0][2]overlay=x='':y=''" -q:v 2 -t
>>>> 4 -y out
>>> x="":y="" are invalid arguments. They must be valid, even if they not
>>> gonna be used later.
>>
>> now it works. Thank you!
>>
>
> Should be added to sendcmd documentation:
>
> -- An example which shows where to insert the sendcmd filter, if the
> target filter has more than one input.
> -- All arguments of filters must be initialized with valid values, even
> if they are never used because sendcmd overwrites them.
>

patch welcome

> Michael
>
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