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avformat/mpegtsenc: do not include adaptation field in teletext TS packets

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From ETSI EN 300 472 V1.3.1 (2003-05) Specification for conveying ITU-R System
B Teletext in DVB bitstreams:

4.1 Transport Stream (TS) packet format
The standard TS packet syntax and semantics are followed, noting the following
constraint:
- adaptation_field_control only the values "01" and "10" are permitted.

Some set top boxes (Motorola, Arris, Zyxel) refuse non-conforming packets.

Signed-off-by: Alex Shumsky <alexthreed@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Alex Shumsky 2021-10-21 17:58:02 +03:00 committed by Marton Balint
parent a085418303
commit 1728127e8c
1 changed files with 2 additions and 1 deletions
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libavformat/mpegtsenc.c
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@ -1564,7 +1564,8 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
q = get_ts_payload_start(buf);
ts_st->discontinuity = 0;
}
if (key && is_start && pts != AV_NOPTS_VALUE) {
if (key && is_start && pts != AV_NOPTS_VALUE &&
!is_dvb_teletext /* adaptation+payload forbidden for teletext (ETSI EN 300 472 V1.3.1 4.1) */) {
// set Random Access for key frames
if (ts_st->pcr_period)
write_pcr = 1;