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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>
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@ -16059,7 +16059,8 @@ Modify value of already present key.
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@item delete
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If @code{value} is set, delete only keys that have such value.
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Otherwise, delete key.
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Otherwise, delete key. If @code{key} is not set, delete all metadata values in
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the frame.
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@item print
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Print key and its value if metadata was found. If @code{key} is not set print all
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@ -16067,7 +16068,7 @@ metadata values available in frame.
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@end table
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@item key
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Set key used with all modes. Must be set for all modes except @code{print}.
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Set key used with all modes. Must be set for all modes except @code{print} and @code{delete}.
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@item value
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Set metadata value which will be used. This option is mandatory for
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@ -194,7 +194,7 @@ static av_cold int init(AVFilterContext *ctx)
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MetadataContext *s = ctx->priv;
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int ret;
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if (!s->key && s->mode != METADATA_PRINT) {
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if (!s->key && s->mode != METADATA_PRINT && s->mode != METADATA_DELETE) {
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av_log(ctx, AV_LOG_WARNING, "Metadata key must be set\n");
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return AVERROR(EINVAL);
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}
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@ -328,7 +328,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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return ff_filter_frame(outlink, frame);
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break;
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case METADATA_DELETE:
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if (e && e->value && s->value && s->compare(s, e->value, s->value)) {
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if (!s->key) {
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av_dict_free(metadata);
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} else if (e && e->value && s->value && s->compare(s, e->value, s->value)) {
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av_dict_set(metadata, s->key, NULL, 0);
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} else if (e && e->value) {
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av_dict_set(metadata, s->key, NULL, 0);
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