demux_lavf: drop obscure genpts option

This code shouldn't even exist in libavformat. If you still need it, you
can enable it via --demuxer-lavf-o.

DOCS/man/options.rst

@@ -2763,12 +2763,6 @@ Demuxer
     imperfect behavior from libavformat demuxers. Passing ``no`` disables
     these. For debugging and testing only.
 
-``--demuxer-lavf-genpts-mode=<no|lavf>``
-    Mode for deriving missing packet PTS values from packet DTS. ``lavf``
-    enables libavformat's ``genpts`` option. ``no`` disables it. This used
-    to be enabled by default, but then it was deemed as not needed anymore.
-    Enabling this might help with timestamp problems, or make them worse.
-
 ``--demuxer-lavf-o=<key>=<value>[,<key>=<value>[,...]]``
     Pass AVOptions to libavformat demuxer.
 

demux/demux_lavf.c

@@ -76,7 +76,6 @@ struct demux_lavf_opts {
     char *format;
     char **avopts;
     int hacks;
-    int genptsmode;
     char *sub_cp;
     int rtsp_transport;
 };
@@ -95,8 +94,6 @@ const struct m_sub_options demux_lavf_conf = {
         OPT_INTRANGE("demuxer-lavf-probescore", probescore, 0,
                      1, AVPROBE_SCORE_MAX),
         OPT_FLAG("demuxer-lavf-hacks", hacks, 0),
-        OPT_CHOICE("demuxer-lavf-genpts-mode", genptsmode, 0,
-                   ({"lavf", 1}, {"no", 0})),
         OPT_KEYVALUELIST("demuxer-lavf-o", avopts, 0),
         OPT_STRING("sub-codepage", sub_cp, 0),
         OPT_CHOICE("rtsp-transport", rtsp_transport, 0,
@@ -814,8 +811,6 @@ static int demux_open_lavf(demuxer_t *demuxer, enum demux_check check)
     if (!avfc)
         return -1;
 
-    if (lavfdopts->genptsmode)
-        avfc->flags |= AVFMT_FLAG_GENPTS;
     if (index_mode != 1)
         avfc->flags |= AVFMT_FLAG_IGNIDX;