int opt_default(const char *opt, const char *arg)
{
const AVOption *o;
- if ((o = av_opt_find(avcodec_opts[0], opt, NULL, 0, AV_OPT_SEARCH_CHILDREN)) ||
+ char opt_stripped[128];
+ const char *p;
+
+ if (!(p = strchr(opt, ':')))
+ p = opt + strlen(opt);
+ av_strlcpy(opt_stripped, opt, FFMIN(sizeof(opt_stripped), p - opt + 1));
+
+ if ((o = av_opt_find(avcodec_opts[0], opt_stripped, NULL, 0, AV_OPT_SEARCH_CHILDREN)) ||
((opt[0] == 'v' || opt[0] == 'a' || opt[0] == 's') &&
(o = av_opt_find(avcodec_opts[0], opt+1, NULL, 0, 0))))
av_dict_set(&codec_opts, opt, arg, FLAGS);
return f;
}
-AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id, int encoder)
+int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
+{
+ if (*spec <= '9' && *spec >= '0') /* opt:index */
+ return strtol(spec, NULL, 0) == st->index;
+ else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd') { /* opt:[vasd] */
+ enum AVMediaType type;
+
+ switch (*spec++) {
+ case 'v': type = AVMEDIA_TYPE_VIDEO; break;
+ case 'a': type = AVMEDIA_TYPE_AUDIO; break;
+ case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
+ case 'd': type = AVMEDIA_TYPE_DATA; break;
+ }
+ if (type != st->codec->codec_type)
+ return 0;
+ if (*spec++ == ':') { /* possibly followed by :index */
+ int i, index = strtol(spec, NULL, 0);
+ for (i = 0; i < s->nb_streams; i++)
+ if (s->streams[i]->codec->codec_type == type && index-- == 0)
+ return i == st->index;
+ return 0;
+ }
+ return 1;
+ } else if (!*spec) /* empty specifier, matches everything */
+ return 1;
+
+ av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
+ return AVERROR(EINVAL);
+}
+
+AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id, AVFormatContext *s, AVStream *st)
{
AVDictionary *ret = NULL;
AVDictionaryEntry *t = NULL;
- AVCodec *codec = encoder ? avcodec_find_encoder(codec_id) : avcodec_find_decoder(codec_id);
- int flags = encoder ? AV_OPT_FLAG_ENCODING_PARAM : AV_OPT_FLAG_DECODING_PARAM;
+ AVCodec *codec = s->oformat ? avcodec_find_encoder(codec_id) : avcodec_find_decoder(codec_id);
+ int flags = s->oformat ? AV_OPT_FLAG_ENCODING_PARAM : AV_OPT_FLAG_DECODING_PARAM;
char prefix = 0;
if (!codec)
}
while (t = av_dict_get(opts, "", t, AV_DICT_IGNORE_SUFFIX)) {
+ char *p = strchr(t->key, ':');
+
+ /* check stream specification in opt name */
+ if (p)
+ switch (check_stream_specifier(s, st, p + 1)) {
+ case 1: *p = 0; break;
+ case 0: continue;
+ default: return NULL;
+ }
+
if (av_opt_find(avcodec_opts[0], t->key, NULL, flags, 0) ||
(codec && codec->priv_class && av_opt_find(&codec->priv_class, t->key, NULL, flags, 0)))
av_dict_set(&ret, t->key, t->value, 0);
else if (t->key[0] == prefix && av_opt_find(avcodec_opts[0], t->key+1, NULL, flags, 0))
av_dict_set(&ret, t->key+1, t->value, 0);
+
+ if (p)
+ *p = ':';
}
return ret;
}
return NULL;
}
for (i = 0; i < s->nb_streams; i++)
- opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id, 0);
+ opts[i] = filter_codec_opts(codec_opts, s->streams[i]->codec->codec_id, s, s->streams[i]);
return opts;
}
void (* parse_arg_function)(const char*));
/**
+ * Check if the given stream matches a stream specifier.
+ *
+ * @param s Corresponding format context.
+ * @param st Stream from s to be checked.
+ * @param spec A stream specifier of the [v|a|s|d]:[<stream index>] form.
+ *
+ * @return 1 if the stream matches, 0 if it doesn't, <0 on error
+ */
+int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec);
+
+/**
* Filter out options for given codec.
*
* Create a new options dictionary containing only the options from
* opts which apply to the codec with ID codec_id.
*
- * @param encoder if non-zero the codec is an encoder, otherwise is a decoder
+ * @param s Corresponding format context.
+ * @param st A stream from s for which the options should be filtered.
* @return a pointer to the created dictionary
*/
-AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id, int encoder);
+AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id, AVFormatContext *s, AVStream *st);
/**
* Setup AVCodecContext options for avformat_find_stream_info().
ffmpeg -i input.flac -id3v2_version 3 out.mp3
@end example
+You can precisely specify which stream(s) should the codec AVOption apply to by
+appending a stream specifier of the form
+@option{[:@var{stream_type}][:@var{stream_index}]} to the option name.
+@var{stream_type} is 'v' for video, 'a' for audio and 's' for subtitle streams.
+@var{stream_index} is a global stream index when @var{stream_type} isn't
+given, otherwise it counts streams of the given type only. As always, the index
+is zero-based. For example
+@example
+-foo -- applies to all applicable streams
+-foo:v -- applies to all video streams
+-foo:a:2 -- applies to the third audio stream
+-foo:0 -- applies to the first stream
+@end example
+
Note -nooption syntax cannot be used for boolean AVOptions, use -option
0/-option 1.
+
+Note2 old undocumented way of specifying per-stream AVOptions by prepending
+v/a/s to the options name is now obsolete and will be removed soon.