codecparsers: h264: fix SEI parsing

... in the presence of emulation_prevention_three_byte.

Fixes #668381.

diff --git a/gst-libs/gst/codecparsers/gsth264parser.c b/gst-libs/gst/codecparsers/gsth264parser.c
index 2f18ffd..572a28d 100644 (file)
--- a/gst-libs/gst/codecparsers/gsth264parser.c
+++ b/gst-libs/gst/codecparsers/gsth264parser.c
@@ -1938,13 +1938,11 @@ gst_h264_parser_parse_sei (GstH264NalParser * nalparser, GstH264NalUnit * nalu,
       sei->payloadType, payload_size);
 
   if (sei->payloadType == GST_H264_SEI_BUF_PERIOD) {
-    /* Set the nal reader size properly */
-    nr.size = payload_size;
+    /* size not set; might depend on emulation_prevention_three_byte */
     res = gst_h264_parser_parse_buffering_period (nalparser,
         &sei->buffering_period, &nr);
   } else if (sei->payloadType == GST_H264_SEI_PIC_TIMING) {
-    /* Set the nal reader size properly */
-    nr.size = payload_size;
+    /* size not set; might depend on emulation_prevention_three_byte */
     res = gst_h264_parser_parse_pic_timing (nalparser, &sei->pic_timing, &nr);
   } else
     res = GST_H264_PARSER_OK;