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h264/h265parse: Fix initial skip

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Account for start codes possibly be 4 bytes. For HEVC, also take into
account that we might be missing only one of the two identification
bytes.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1251>
This commit is contained in:
Nicolas Dufresne 2020-05-07 11:06:45 -04:00
parent 3784bd4a73
commit 269ab891c5
2 changed files with 6 additions and 2 deletions
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3
gst/videoparsers/gsth264parse.c
View file

@ -1384,7 +1384,8 @@ gst_h264_parse_handle_frame (GstBaseParse * parse,
}
break;
case GST_H264_PARSER_NO_NAL:
*skipsize = size - 3;
/* Start code may have up to 4 bytes */
*skipsize = size - 4;
goto skip;
break;
default:

5
gst/videoparsers/gsth265parse.c
View file

@ -1208,7 +1208,10 @@ gst_h265_parse_handle_frame (GstBaseParse * parse,
}
break;
case GST_H265_PARSER_NO_NAL:
*skipsize = size - 3;
/* start code may have up to 4 bytes, and we may also get that return
* value if only one of the two header bytes are present, make sure
* not to skip too much */
*skipsize = size - 5;
goto skip;
default:
/* should not really occur either */