In gxf muxer, round up number of lines mod 16 in mpeg umf data, based patch by...

In gxf muxer, round up number of lines mod 16 in mpeg umf data, based patch by Reuben Martin, reuben dot m at gmail dot com

Originally committed as revision 25401 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/gxfenc.c

@@ -190,7 +190,7 @@ static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, AVStream *st)
                     "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
                     (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
                     st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
-                    starting_line, st->codec->height / 16);
+                    starting_line, (st->codec->height + 15) / 16);
     put_byte(pb, TRACK_MPG_AUX);
     put_byte(pb, size + 1);
     put_buffer(pb, (uint8_t *)buffer, size + 1);