[FFmpeg-cvslog] avformat/dvdvideodec: default menu_vts option to 1 and clarify description

[Marth64]

ffmpeg | branch: master | Marth64 <marth64 at proxyid.net> | Mon Oct  7 18:04:59 2024 -0500| [4a03e95ff4c3ed15d5420bd97c7868e0b62e1d0a] | committer: Marth64

avformat/dvdvideodec: default menu_vts option to 1 and clarify description

Menu 0 is the VIDEO_TS root menu, which does not appear to be used
commonly for menu segments. Instead, default to the menu of VTS 1.

Signed-off-by: Marth64 <marth64 at proxyid.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4a03e95ff4c3ed15d5420bd97c7868e0b62e1d0a
---

 doc/demuxers.texi         | 2 +-
 libavformat/dvdvideodec.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index a03e80732a..95be82aefc 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -384,7 +384,7 @@ Default is 0, the first language unit.
 
 @item menu_vts @var{int}
 The VTS where the menu lives, or 0 if it is a VMG menu (root-level).
-Default is 0, VMG menu.
+Default is 1, menu of the first VTS.
 
 @item pgc @var{int}
 The entry PGC to start playback, in conjunction with @option{pg}.
diff --git a/libavformat/dvdvideodec.c b/libavformat/dvdvideodec.c
index f7c7ba5a3b..1da1865061 100644
--- a/libavformat/dvdvideodec.c
+++ b/libavformat/dvdvideodec.c
@@ -1783,7 +1783,7 @@ static const AVOption dvdvideo_options[] = {
     {"chapter_start",   "entry chapter (PTT) number",                               OFFSET(opt_chapter_start),  AV_OPT_TYPE_INT,    { .i64=1 },     1,          99,        AV_OPT_FLAG_DECODING_PARAM },
     {"menu",            "demux menu domain",                                        OFFSET(opt_menu),           AV_OPT_TYPE_BOOL,   { .i64=0 },     0,          1,         AV_OPT_FLAG_DECODING_PARAM },
     {"menu_lu",         "menu language unit (0=auto)",                              OFFSET(opt_menu_lu),        AV_OPT_TYPE_INT,    { .i64=0 },     0,          99,        AV_OPT_FLAG_DECODING_PARAM },
-    {"menu_vts",        "menu VTS (0=VMG main menu)",                               OFFSET(opt_menu_vts),       AV_OPT_TYPE_INT,    { .i64=0 },     0,          99,        AV_OPT_FLAG_DECODING_PARAM },
+    {"menu_vts",        "menu VTS (0=VMG root menu)",                               OFFSET(opt_menu_vts),       AV_OPT_TYPE_INT,    { .i64=1 },     0,          99,        AV_OPT_FLAG_DECODING_PARAM },
     {"pg",              "entry PG number (when paired with PGC number)",            OFFSET(opt_pg),             AV_OPT_TYPE_INT,    { .i64=1 },     1,          255,       AV_OPT_FLAG_DECODING_PARAM },
     {"pgc",             "entry PGC number (0=auto)",                                OFFSET(opt_pgc),            AV_OPT_TYPE_INT,    { .i64=0 },     0,          999,       AV_OPT_FLAG_DECODING_PARAM },
     {"preindex",        "enable for accurate chapter markers, slow (2-pass read)",  OFFSET(opt_preindex),       AV_OPT_TYPE_BOOL,   { .i64=0 },     0,          1,         AV_OPT_FLAG_DECODING_PARAM },