X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fsubviewerdec.c;h=06b827b70f113d60bec84f218b8840e2bd425255;hb=d580c7a7979613f352cfc9701f7ff4fe83b33af2;hp=af084f48560ddfae970d41204786719d1404c05a;hpb=f8377ffce35251bba043aeda5d81df0d411a0595;p=ffmpeg

diff --git a/libavformat/subviewerdec.c b/libavformat/subviewerdec.c
index af084f48560..06b827b70f1 100644
--- a/libavformat/subviewerdec.c
+++ b/libavformat/subviewerdec.c
@@ -27,6 +27,7 @@
 #include "avformat.h"
 #include "internal.h"
 #include "subtitles.h"
+#include "avio_internal.h"
 #include "libavcodec/internal.h"
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
@@ -36,7 +37,7 @@ typedef struct {
     FFDemuxSubtitlesQueue q;
 } SubViewerContext;
 
-static int subviewer_probe(AVProbeData *p)
+static int subviewer_probe(const AVProbeData *p)
 {
     char c;
     const unsigned char *ptr = p->buf;
@@ -78,6 +79,11 @@ static int subviewer_read_header(AVFormatContext *s)
 
     if (!st)
         return AVERROR(ENOMEM);
+    res = ffio_ensure_seekback(s->pb, 3);
+    if (res < 0)
+        return res;
+    if (avio_rb24(s->pb) != 0xefbbbf)
+        avio_seek(s->pb, -3, SEEK_CUR);
     avpriv_set_pts_info(st, 64, 1, 100);
     st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
     st->codecpar->codec_id   = AV_CODEC_ID_SUBVIEWER;