sd_lavc: enable teletext

Whitelisting supported codecs is (probably) still better than just
allowing everything, given the weird FFmpeg API. I'm also assuming
Libav doesn't even have the codec ID, but I didn't check.

Also add a --teletext-page option, since otherwise it decodes every
teletext page and shows them in succession.

And yes, we can't use av_opt_set_int() - instead we have to set it as
string. Because FFmpeg's option system is terrible.

1 files changed, 1 insertions, 0 deletions

diff --git a/options/options.h b/options/options.h
index 7d6701cd1e..96345e66f4 100644
--- a/options/options.h
+++ b/options/options.h
@@ -281,6 +281,7 @@ typedef struct MPOpts {
     int ass_hinting;
     int ass_shaper;
     int sub_clear_on_seek;
+    int teletext_page;
 
     int hwdec_api;
     char *hwdec_codecs;