feat: default to IINA for piped playback

src/main.rs

@@ -1,13 +1,13 @@
 //! A Ratatui YouTube browser backed by yt-dlp and FFmpeg, with no API key.
 //!
-//! Run `cargo run -- --player mpv --player-arg=--volume=50 "rust programming"`.
+//! Run `cargo run -- "rust programming"`; macOS defaults to IINA, other platforms to mpv.
 //! Without a CLI query, start in insert mode; otherwise search and start in normal mode.
 //! Insert: Enter submits a changed query and returns to normal; Esc returns without searching.
 //! Normal: j/k selects, Enter streams, and i returns to insert mode to edit the query.
 //! Normal-mode d opens the full description; Up/Down scrolls lines and PgUp/PgDn scrolls pages.
 //! The centered popup uses up to 70% width and 60% height, capped at 96 by 20 cells.
 //! Esc closes the popup; j/k loads the selected video's description and i returns to editing.
-//! The player must read media from standard input when passed `-`.
+//! IINA receives `--stdin`; other players must read standard input when passed `-`.
 //! Audio and video are streamed through a pipe, never saved to a video file.
 //! See `--help` for controls; replacing playback or quitting cancels its processes.
 
@@ -30,14 +30,14 @@ use youtube::{Job, Playback, Video};
 #[command(
     version,
     about = "Search YouTube and stream videos to your chosen player",
-    after_help = "Requires yt-dlp, FFmpeg, and a player on PATH.\nThe player receives audio/video on standard input, with '-' as its last argument.\nWithout a CLI query, start in INSERT; a CLI query is searched automatically in NORMAL.\nINSERT: type to edit; Enter submits if changed and returns to NORMAL; Esc returns without submitting.\nNORMAL: j/k or arrows select; Enter streams; i edits the query; d toggles description; q quits.\nOpening the description fetches full video metadata, preserving paragraphs and caching it for these results.\nThe centered description window uses up to 70% width and 60% height, capped at 96 by 20 cells.\nWhile it is open, Up/Down scroll lines and PgUp/PgDn scroll pages; j/k still selects videos.\nEsc closes the description; i closes it to edit the query. Scrolling stays within the text.\nCtrl-U clears in INSERT; Ctrl-C quits in either mode.\nSelecting another video replaces playback. Quitting stops playback.\nExample: tubular --player mpv --player-arg=--volume=50 \"rust programming\""
+    after_help = "Requires yt-dlp, FFmpeg, and a player on PATH.\nDefaults to IINA on macOS and mpv elsewhere; --player overrides the default.\nIINA receives '--stdin'; other players receive '-' to read audio/video from standard input.\nWithout a CLI query, start in INSERT; a CLI query is searched automatically in NORMAL.\nINSERT: type to edit; Enter submits if changed and returns to NORMAL; Esc returns without submitting.\nNORMAL: j/k or arrows select; Enter streams; i edits the query; d toggles description; q quits.\nOpening the description fetches full video metadata, preserving paragraphs and caching it for these results.\nThe centered description window uses up to 70% width and 60% height, capped at 96 by 20 cells.\nWhile it is open, Up/Down scroll lines and PgUp/PgDn scroll pages; j/k still selects videos.\nEsc closes the description; i closes it to edit the query. Scrolling stays within the text.\nCtrl-U clears in INSERT; Ctrl-C quits in either mode.\nSelecting another video replaces playback. Quitting stops playback.\nExample: tubular --player mpv --player-arg=--volume=50 \"rust programming\""
 )]
 struct Options {
-    /// Player executable (must support '-' for media on standard input).
+    /// Player executable (IINA or a player supporting '-' for standard input).
-    #[arg(long, default_value = "mpv")]
+    #[arg(long, default_value = if cfg!(target_os = "macos") { "iina" } else { "mpv" })]
     player: OsString,
 
-    /// Argument passed to the player before '-'; repeat for multiple arguments.
+    /// Argument passed to the player before its standard-input flag; repeat as needed.
     #[arg(long, allow_hyphen_values = true)]
     player_arg: Vec<OsString>,
 

src/youtube.rs

@@ -230,7 +230,10 @@ impl Playback {
         let stream = extractor.stdout.take().expect("stdout is piped");
         let player = match isolated_command(player)
             .args(args)
-            .arg("-")
+            .arg(match std::path::Path::new(player).file_name() {
+                Some(name) if name == "iina" || name == "iina-cli" => "--stdin",
+                _ => "-",
+            })
             .stdin(Stdio::from(stream))
             .stdout(Stdio::null())
             .stderr(Stdio::piped())