[FFmpeg-devel] [PATCH]Write total number of tracks to m4a

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Aug 1 10:13:00 CEST 2013


On Thursday 01 August 2013 01:52:56 am Michael Niedermayer wrote:
> On Thu, Aug 01, 2013 at 12:29:58AM +0200, Carl Eugen Hoyos wrote:
> > Attached patch fixes ticket #2157 for me.

> might be simpler with strchr()

New patch attached.

Please comment, Carl Eugen
-------------- next part --------------
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 42ec3f2..e9f5b47 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2022,6 +2022,10 @@ static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,
     AVDictionaryEntry *t = av_dict_get(s->metadata, "track", NULL, 0);
     int size = 0, track = t ? atoi(t->value) : 0;
     if (track) {
+        int tracks = 0;
+        char *slash = strchr(t->value, '/');
+        if (slash)
+            tracks = atoi(slash + 1);
         avio_wb32(pb, 32); /* size */
         ffio_wfourcc(pb, "trkn");
         avio_wb32(pb, 24); /* size */
@@ -2030,7 +2034,7 @@ static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,
         avio_wb32(pb, 0);
         avio_wb16(pb, 0);        // empty
         avio_wb16(pb, track);    // track number
-        avio_wb16(pb, 0);        // total track number
+        avio_wb16(pb, tracks);   // total track number
         avio_wb16(pb, 0);        // empty
         size = 32;
     }


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