player: add --keep-open-pause=no option

Instead of pausing if --keep-open is active, stop
at end but continue playing if seeking backwards.
And then stop again when end is reached.

Signed-off-by: wm4 <wm4@nowhere>

Over the PR, the option was renamed, and the manpage additions were
slightly changed/enhanced.

DOCS/interface-changes.rst

@@ -43,6 +43,7 @@ Interface changes
       moved to "somewhere else" syntax-wise.
     - deprecate --loop - after a deprecation period, it will be undeprecated,
       but changed to alias --loop-file
+    - add --keep-open-pause=no
  --- mpv 0.24.0 ---
     - deprecate --hwdec-api and replace it with --opengl-hwdec-interop.
       The new option accepts both --hwdec values, as well as named backends.

DOCS/man/options.rst

@@ -2070,6 +2070,9 @@ Window
     Instead, pause the player. When trying to seek beyond end of the file, the
     player will attempt to seek to the last frame.
 
+    Normally, this will act like ``set pause yes`` on EOF, unless the
+    ``--keep-open-pause=no`` option is set.
+
     The following arguments can be given:
 
     :no:        If the current file ends, go to the next file or terminate.
@@ -2096,6 +2099,11 @@ Window
     file.mkv normally, then fail to open ``/dev/null``, then exit). (In
     mpv 0.8.0, ``always`` was introduced, which restores the old behavior.)
 
+``--keep-open-pause=<yes|no>``
+    If set to ``no``, instead of pausing when ``--keep-open`` is active, just
+    stop at end of file and continue playing forward when you seek backwards
+    until end where it stops again. Default: ``yes``.
+
 ``--image-display-duration=<seconds|inf>``
     If the current file is an image, play the image for the given amount of
     seconds (default: 1). ``inf`` means the file is kept open forever (until

options/options.c

@@ -354,6 +354,7 @@ const m_option_t mp_opts[] = {
                ({"no", 0},
                 {"yes", 1},
                 {"always", 2})),
+    OPT_FLAG("keep-open-pause", keep_open_pause, 0),
     OPT_DOUBLE("image-display-duration", image_display_duration,
                M_OPT_RANGE, 0, INFINITY),
 
@@ -911,6 +912,7 @@ const struct MPOpts mp_default_opts = {
     .play_frames = -1,
     .rebase_start_time = 1,
     .keep_open = 0,
+    .keep_open_pause = 1,
     .image_display_duration = 1.0,
     .stream_id = { { [STREAM_AUDIO] = -1,
                      [STREAM_VIDEO] = -1,

options/options.h

@@ -200,6 +200,7 @@ typedef struct MPOpts {
     char *watch_later_directory;
     int pause;
     int keep_open;
+    int keep_open_pause;
     double image_display_duration;
     char *lavfi_complex;
     int stream_id[2][STREAM_TYPE_COUNT];

player/playloop.c

@@ -831,7 +831,7 @@ static void handle_keep_open(struct MPContext *mpctx)
                 seek_to_last_frame(mpctx);
             mpctx->playback_pts = mpctx->last_vo_pts;
         }
-        if (!mpctx->opts->pause)
+        if (opts->keep_open_pause && !mpctx->opts->pause)
             pause_player(mpctx);
     }
 }