From e5ebd7d846a296f6018cf2af32fd229a4a05f424 Mon Sep 17 00:00:00 2001 From: Matej Knopp Date: Tue, 30 Jul 2013 15:17:23 +0200 Subject: [PATCH] mpegvideoparse: support field encoding for interlaced video https://bugzilla.gnome.org/show_bug.cgi?id=705144 --- gst/videoparsers/gstmpegvideoparse.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/gst/videoparsers/gstmpegvideoparse.c b/gst/videoparsers/gstmpegvideoparse.c index 073a330..b5a6d01 100644 --- a/gst/videoparsers/gstmpegvideoparse.c +++ b/gst/videoparsers/gstmpegvideoparse.c @@ -540,6 +540,21 @@ gst_mpegv_parse_process_sc (GstMpegvParse * mpvparse, else GST_LOG_OBJECT (mpvparse, "Couldn't parse picture at offset %d", mpvparse->pic_offset); + + /* if terminating packet is a picture, we need to check if it has same TSN as the picture that is being + terminated. If it does, we need to keep those together, as these packets are two fields of the same + frame */ + if (packet->type == GST_MPEG_VIDEO_PACKET_PICTURE) { + if (info->size - off < 2) { /* we need at least two bytes to read the TSN */ + ret = FALSE; + } else { + /* TSN is stored in first 10 bits */ + int tsn = info->data[off] << 2 | (info->data[off + 1] & 0xC0) >> 6; + + if (tsn == mpvparse->pichdr.tsn) /* prevent termination if TSN is same */ + ret = FALSE; + } + } } return ret; -- 2.7.4