feat(rust): add --codec isdb CLI flag for ISDB/ARIB subtitle selection

src/rust/src/args.rs

@@ -754,6 +754,7 @@ pub struct Args {
     ///     nothing is selected and no subtitle is generated
     /// --codec teletext
     ///     select the teletext subtitle from elementary stream
+    /// --codec isdb      select ISDB/ARIB subtitle stream (Japanese broadcast)
     #[arg(long, verbatim_doc_comment, value_name="value", help_heading=OUTPUT_AFFECTING_CODEC)]
     pub codec: Option<CCXCodec>,
     /// --no-codec dvbsub
@@ -977,6 +978,7 @@ pub struct Args {
 pub enum CCXCodec {
     Dvbsub,
     Teletext,
+    Isdb,
 }
 
 #[derive(Display, Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, ValueEnum)]

src/rust/src/parser.rs

@@ -679,6 +679,9 @@ impl OptionsExt for Options {
                 CCXCodec::Dvbsub => {
                     self.demux_cfg.codec = SelectCodec::Some(Codec::Dvb);
                 }
+                CCXCodec::Isdb => {
+                    self.demux_cfg.codec = SelectCodec::Some(Codec::IsdbCc);
+                }
             }
         }
 
@@ -690,6 +693,9 @@ impl OptionsExt for Options {
                 CCXCodec::Teletext => {
                     self.demux_cfg.nocodec = SelectCodec::Some(Codec::Teletext);
                 }
+                CCXCodec::Isdb => {
+                    self.demux_cfg.nocodec = SelectCodec::Some(Codec::IsdbCc);
+                }
             }
         }