options: add -sub-speed option

Should we actually get into trouble for unproper handling of
frame-based subtitle formats, this might be the simplest way to
work this around. Also is a bit more intuitive than -subfps, which
might use an unknown, misdetected, or non-sense video FPS.
Still pretty silly, though.

1 files changed, 1 insertions, 0 deletions

diff --git a/core/options.h b/core/options.h
index 6ec051ddca..0c6f6c7271 100644
--- a/core/options.h
+++ b/core/options.h
@@ -141,6 +141,7 @@ typedef struct MPOpts {
     int sub_pos;
     float sub_delay;
     float sub_fps;
+    float sub_speed;
     int forced_subs_only;
     char *quvi_format;