[FFmpeg-devel] implement process_command for vf_scale and vf_crop

Paul B Mahol onemda at gmail.com
Mon Jul 6 11:17:09 CEST 2015

On 6/25/15, Bernd Blessmann <bb at it-entwicklung.de> wrote:
> Hi all,
> I want to implement process_command for vf_scale.c and vf_crop.c in order to
> use zmq to change
> scaling and cropping dynamically.
> I have implemented it using av_opt_set() and calling config_props() for
> scale and config_input() and
> config_output() for crop. I am using the config_-functions because they
> handle variable parsing and
> checking of the values. But I do not know if this is the right way to do it
> and if it is safe to
> call these functions from process_command.
> Maybe someone can comment on these implementation or outline a way to
> implement process_command for
> these filters.
> I attach patches including my implementation so far.
> Thank you very much in advance
>    Bernd

If it works I guess it should be ok. But newly added stuff should be
somewhere documented...

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