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avfilter/vf_chromakey: add support for commands

This commit is contained in:
Paul B Mahol 2019-11-21 17:19:40 +01:00
parent ae6c4168e6
commit 94c0b27397
2 changed files with 29 additions and 1 deletions
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14
doc/filters.texi
View File

@ -6863,6 +6863,13 @@ Literal colors like "green" or "red" don't make sense with this enabled anymore.
This can be used to pass exact YUV values as hexadecimal numbers.
@end table
@subsection Commands
This filter supports same @ref{commands} as options.
The command accepts the same syntax of the corresponding option.
If the specified expression is not valid, it is kept at its current
value.
@section chromakey
YUV colorspace color/chroma keying.
@ -6892,6 +6899,13 @@ Literal colors like "green" or "red" don't make sense with this enabled anymore.
This can be used to pass exact YUV values as hexadecimal numbers.
@end table
@subsection Commands
This filter supports same @ref{commands} as options.
The command accepts the same syntax of the corresponding option.
If the specified expression is not valid, it is kept at its current
value.
@subsection Examples
@itemize

16
libavfilter/vf_chromakey.c
View File

@ -353,6 +353,18 @@ static av_cold int config_input(AVFilterLink *inlink)
return 0;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return config_output(ctx->outputs[0]);
}
static const AVFilterPad chromakey_inputs[] = {
{
.name = "default",
@ -374,7 +386,7 @@ static const AVFilterPad chromakey_outputs[] = {
};
#define OFFSET(x) offsetof(ChromakeyContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption chromakey_options[] = {
{ "color", "set the chromakey key color", OFFSET(chromakey_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
@ -395,6 +407,7 @@ AVFilter ff_vf_chromakey = {
.inputs = chromakey_inputs,
.outputs = chromakey_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};
static const AVOption chromahold_options[] = {
@ -436,4 +449,5 @@ AVFilter ff_vf_chromahold = {
.inputs = chromahold_inputs,
.outputs = chromahold_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};