Am 27.03.2020 um 10:40 schrieb Paul B Mahol:
On 3/27/20, Michael Koch <[email protected]> wrote:
Am 27.03.2020 um 10:29 schrieb Paul B Mahol:
On 3/27/20, Michael Koch <[email protected]> wrote:
Am 27.03.2020 um 10:10 schrieb Paul B Mahol:
On 3/27/20, foxtail mega <[email protected]> wrote:
Actually I meant when ffmpeg is running, I want to send parameters to
that
running ffmpeg instance and that should change the filter_complex
overlay
parameters in the next frame of processing.
Using expression is like hard coding parameters into ffmpeg command. I
need
something where I can send the variable parameters when I need it
without
stopping the current running ffmpeg command.
Please stop top posting.
There is sendcmd filter for this, but I think overlay filter does not
support commands,
but that could be easily fixed.
The overlay filter does already support commands. There is an example in
chapter 2.61 of my book:
http://www.astro-electronic.de/FFmpeg_Book.pdf
But I think the question was if the parameters can be changed in
real-time while ffmpeg is running. I don't know if this is possible.
Look at realtime filter.
That's not what the OP wanted. He wrote:
"Actually I meant when ffmpeg is running, I want to send parameters to that
running ffmpeg instance and that should change the filter_complex overlay
parameters in the next frame of processing.
Using expression is like hard coding parameters into ffmpeg command. I need
something where I can send the variable parameters when I need it without
stopping the current running ffmpeg command."
Exactly and realtime filter allows exactly that in combination with
filters that send commands, there are at least 2 such filters for
video.
To the OP: Please clarify where the information (x,y for overlay filter)
comes from.
If I understood the question right, the coordinates are unknown when
FFmpeg is started and come from somewhere else while FFmpeg is running.
He needs a filter that receives commands from outside of FFmpeg.
Michael
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