diff options
| author | Bela Bodecs <bodecsb@vivanet.hu> | 2018-04-13 12:11:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-04-13 21:44:28 +0200 |
| commit | 3e1204b94d1ab586e4a5b1fc7c51559bc2447dcd (patch) | |
| tree | 6f596d34f34a7eb70d8862c3a198a90aa6d7339f /libavformat | |
| parent | 6b28e551d00912e0efeda8536039f8204752a684 (diff) | |
avformat/utils: Stream specifier enhancement 2.
In some cases, mainly working with multiprogram mpeg-ts containers as
input, it would be handy to select sub stream of a specific program by
their metadata.
This patch makes it possible to narrow the stream selection among
streams of the specified program by stream metadata.
Examples:
p:601:m:language:hun will select all sub streams of program with id 601
where sub streams have metadata key named 'language' with value 'hun'.
p:602:m:guide will select all sub streams of program with id 602 where
sub streams have metadata key named 'guide'.
Signed-off-by: Bela Bodecs <bodecsb@vivanet.hu>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/utils.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c index cc35998336..84b926dc5a 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -5124,6 +5124,34 @@ FF_ENABLE_DEPRECATION_WARNINGS } return 0; } + + } else if ( *endptr == 'm') { // p:<id>:m:<metadata_spec> + AVDictionaryEntry *tag; + char *key, *val; + int ret = 0; + + if (*(++endptr) != ':') { + av_log(s, AV_LOG_ERROR, "Invalid stream specifier syntax, missing ':' sign after :m.\n"); + return AVERROR(EINVAL); + } + + val = strchr(++endptr, ':'); + key = val ? av_strndup(endptr, val - endptr) : av_strdup(endptr); + if (!key) + return AVERROR(ENOMEM); + + for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) + if (st->index == s->programs[i]->stream_index[j]) { + tag = av_dict_get(st->metadata, key, NULL, 0); + if (tag && (!val || !strcmp(tag->value, val + 1))) + ret = 1; + + break; + } + + av_freep(&key); + return ret; + } else { // p:<id>:<index> int stream_idx = strtol(endptr, NULL, 0); return stream_idx >= 0 && |