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lavfi/metadata: allow deleting all metadata 

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2016-10-01 13:55:35 +02:00
parent d946424f19
commit 7ef3e5b593
2 changed files with 7 additions and 4 deletions
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5
doc/filters.texi
View File

@ -16059,7 +16059,8 @@ Modify value of already present key.
@item delete
If @code{value} is set, delete only keys that have such value.
Otherwise, delete key.
Otherwise, delete key. If @code{key} is not set, delete all metadata values in
the frame.
@item print
Print key and its value if metadata was found. If @code{key} is not set print all
@ -16067,7 +16068,7 @@ metadata values available in frame.
@end table
@item key
Set key used with all modes. Must be set for all modes except @code{print}.
Set key used with all modes. Must be set for all modes except @code{print} and @code{delete}.
@item value
Set metadata value which will be used. This option is mandatory for

6
libavfilter/f_metadata.c
View File

@ -194,7 +194,7 @@ static av_cold int init(AVFilterContext *ctx)
MetadataContext *s = ctx->priv;
int ret;
if (!s->key && s->mode != METADATA_PRINT) {
if (!s->key && s->mode != METADATA_PRINT && s->mode != METADATA_DELETE) {
av_log(ctx, AV_LOG_WARNING, "Metadata key must be set\n");
return AVERROR(EINVAL);
}
@ -328,7 +328,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
return ff_filter_frame(outlink, frame);
break;
case METADATA_DELETE:
if (e && e->value && s->value && s->compare(s, e->value, s->value)) {
if (!s->key) {
av_dict_free(metadata);
} else if (e && e->value && s->value && s->compare(s, e->value, s->value)) {
av_dict_set(metadata, s->key, NULL, 0);
} else if (e && e->value) {
av_dict_set(metadata, s->key, NULL, 0);