declare private options only if they are used

avoid confusing old versions of ffmpeg

modules/demux/avformat/avformat.c

@@ -44,7 +44,9 @@ vlc_module_begin ()
     set_callbacks( OpenDemux, CloseDemux )
     add_string( "avformat-format", NULL, FORMAT_TEXT, FORMAT_LONGTEXT, true )
     add_obsolete_string("ffmpeg-format") /* removed since 2.1.0 */
+#if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(26<<8)+0)
     add_string( "avformat-options", NULL, AV_OPTIONS_TEXT, AV_OPTIONS_LONGTEXT, true )
+#endif
 
 #ifdef ENABLE_SOUT
     /* mux submodule */
@@ -54,7 +56,9 @@ vlc_module_begin ()
     set_capability( "sout mux", 2 )
     add_string( "sout-avformat-mux", NULL, MUX_TEXT, MUX_LONGTEXT, true )
     add_obsolete_string("ffmpeg-mux") /* removed since 2.1.0 */
+#if (LIBAVFORMAT_VERSION_INT >= ((53<<16)+(2<<8)+0))
     add_string( "sout-avformat-options", NULL, AV_OPTIONS_TEXT, AV_OPTIONS_LONGTEXT, true )
+#endif
     set_callbacks( OpenMux, CloseMux )
 #endif
 #ifndef MERGE_FFMPEG

modules/stream_out/switcher.c

@@ -131,8 +131,10 @@ vlc_module_begin ()
                  QSCALE_TEXT, QSCALE_LONGTEXT, true )
     add_bool( SOUT_CFG_PREFIX "mute-audio", true,
               AUDIO_TEXT, AUDIO_LONGTEXT, true )
+#if LIBAVCODEC_VERSION_MAJOR >= 54
     add_string( SOUT_CFG_PREFIX "options", NULL,
                 AV_OPTIONS_TEXT, AV_OPTIONS_LONGTEXT, true )
+#endif
 vlc_module_end ()
 
 static const char *const ppsz_sout_options[] = {