if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
/* for subtitle, a single PES packet must be generated */
mpegts_write_pes(s, st, buf, size, pts, AV_NOPTS_VALUE);
if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
/* for subtitle, a single PES packet must be generated */
mpegts_write_pes(s, st, buf, size, pts, AV_NOPTS_VALUE);