ff_ffplay: add a option for subtitle

ijkmedia/ijkplayer/ff_ffplay.c

@@ -2445,6 +2445,8 @@ static int stream_component_open(FFPlayer *ffp, int stream_index)
 
         break;
     case AVMEDIA_TYPE_SUBTITLE:
+        if (!ffp->subtitle) break;
+
         is->subtitle_stream = stream_index;
         is->subtitle_st = ic->streams[stream_index];
 

ijkmedia/ijkplayer/ff_ffplay_def.h

@@ -550,6 +550,7 @@ typedef struct FFPlayer {
     int loop;
     int framedrop;
     int64_t seek_at_start;
+    int subtitle;
     int infinite_buffer;
     enum ShowMode show_mode;
     char *audio_codec_name;

ijkmedia/ijkplayer/ff_ffplay_options.h

@@ -79,6 +79,8 @@ static const AVOption ffp_context_options[] = {
         OPTION_OFFSET(framedrop),       OPTION_INT(0, -1, 120) },
     { "seek-at-start",                  "set offset of player should be seeked",
         OPTION_OFFSET(seek_at_start),       OPTION_INT64(0, 0, INT_MAX) },
+    { "subtitle",                       "decode subtitle stream",
+        OPTION_OFFSET(subtitle),        OPTION_INT(0, 0, 1) },
     // FFP_MERGE: window_title
 #if CONFIG_AVFILTER
     { "af",                             "audio filters",