X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=qt-faststart.c;h=f9de435146baecc0b3140206717c2af466f3fef7;hb=51ebd13654aa40d1f1c3c976842b855be10dd3ac;hp=2cc68631520de679b6c20d8a4b20a43f0b34d4f9;hpb=a8fcaf4019ccb7b5ca5e88f2544afab69c0a3e87;p=ffmpeg

diff --git a/qt-faststart.c b/qt-faststart.c
index 2cc68631520..f9de435146b 100644
--- a/qt-faststart.c
+++ b/qt-faststart.c
@@ -243,8 +243,11 @@ int main(int argc, char *argv[])
         free(moov_atom);
         return 1;
     }
-    /* seek after ftyp atom if needed */
-    fseeko(infile, start_offset, SEEK_SET);
+
+    if (start_offset > 0) { /* seek after ftyp atom */
+        fseeko(infile, start_offset, SEEK_SET);
+        last_offset -= start_offset;
+    }
 
     outfile = fopen(argv[2], "wb");
     if (!outfile) {