command: add demuxer-lavf-list property

Was only available with --demuxer-lavf-format=help and the demuxer
needed to be used for it to actually print the list.

This can be used in the future to check if 'dash' support was compiled
with FFmpeg so ytdl_hook can use it instead. For now, dashdec is too
rudimentary to be used right away.

1 files changed, 17 insertions, 0 deletions

diff --git a/common/av_common.c b/common/av_common.c
index 65a212b994..0599d98465 100644
--- a/common/av_common.c
+++ b/common/av_common.c
@@ -26,6 +26,7 @@
 #include <libavutil/error.h>
 #include <libavutil/cpu.h>
 #include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
 
 #include "config.h"
 
@@ -33,6 +34,7 @@
 #include "common/msg.h"
 #include "demux/packet.h"
 #include "demux/stheader.h"
+#include "misc/bstr.h"
 #include "video/fmt-conversion.h"
 #include "av_common.h"
 #include "codecs.h"
@@ -246,6 +248,21 @@ void mp_add_lavc_encoders(struct mp_decoder_list *list)
     }
 }
 
+char **mp_get_lavf_demuxers(void)
+{
+    char **list = NULL;
+    AVInputFormat *cur = NULL;
+    int num = 0;
+    for (;;) {
+        cur = av_iformat_next(cur);
+        if (!cur)
+            break;
+        MP_TARRAY_APPEND(NULL, list, num, talloc_strdup(NULL, cur->name));
+    }
+    MP_TARRAY_APPEND(NULL, list, num, NULL);
+    return list;
+}
+
 int mp_codec_to_av_codec_id(const char *codec)
 {
     int id = AV_CODEC_ID_NONE;