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-rw-r--r--libavformat/gxf.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/libavformat/gxf.c b/libavformat/gxf.c
index 897cdade0f..189f56a417 100644
--- a/libavformat/gxf.c
+++ b/libavformat/gxf.c
@@ -360,10 +360,11 @@ static int gxf_header(AVFormatContext *s, AVFormatParameters *ap) {
}
}
if (pkt_type == PKT_UMF) {
- if (len >= 9) {
+ if (len >= 0x39) {
AVRational fps;
- len -= 9;
- url_fskip(pb, 5);
+ len -= 0x39;
+ url_fskip(pb, 5); // preamble
+ url_fskip(pb, 0x30); // payload description
fps = fps_umf2avr(get_le32(pb));
if (!main_timebase.num || !main_timebase.den) {
// this may not always be correct, but simply the best we can get