audio #:stream don't allow string literal

Author: WyattBlue

auto_editor/help.py

@@ -25,16 +25,19 @@
 If timebase is 30, 400 ticks to 800 means 13.33 to 26.66 seconds
 """.strip(),
         "--edit-based-on": """
-Evalutes a palet expression that returns a bool-array?. The array is then used for
+Evaluates a palet expression that returns a bool-array?. The array is then used for
 editing.
 
 Editing Methods:
  - audio  ; Audio silence/loudness detection
     - threshold threshold? : 4%
-    - stream (or/c nat? 'all "all") : 0
+    - stream (or/c nat? 'all) : 'all
     - mincut nat? : 6
     - minclip nat? : 3
 
+ ; mincut is more significant, there it has a larger default value.
+ ; minclip gets applied first, then mincut
+
  - motion  ; Motion detection specialized for noisy real-life videos
     - threshold threshold? : 2%
     - stream nat? : 0
@@ -150,10 +153,6 @@
 """.strip(),
         "--video-bitrate": """
 `--video-bitrate` sets the target bitrate for the video encoder. It accepts the same format as `--audio-bitrate` and the special `unset` value is allowed.
-""".strip(),
-        "--silent-threshold": """
-Silent threshold is a percentage where 0% represents absolute silence and 100% represents the highest volume in the media file.
-Setting the threshold to `0%` will cut only out areas where area is absolutely silence.
 """.strip(),
         "--margin": """
 Default value: 0.2s,0.2s

auto_editor/lang/palet.py

@@ -1470,7 +1470,7 @@ def edit_all() -> np.ndarray:
 
 
 def edit_audio(
-    threshold: float = 0.04, stream: object = "all", mincut: int = 6, minclip: int = 3
+    threshold: float = 0.04, stream: object = Sym("all"), mincut: int = 6, minclip: int = 3
 ) -> np.ndarray:
     if "@levels" not in env or "@filesetup" not in env:
         raise MyError("Can't use `audio` if there's no input media")
@@ -1480,7 +1480,7 @@ def edit_audio(
     strict = env["@filesetup"].strict
 
     stream_data: NDArray[np.bool_] | None = None
-    if stream == "all" or stream == Sym("all"):
+    if stream == Sym("all"):
         stream_range = range(0, len(src.audios))
     else:
         assert isinstance(stream, int)
@@ -1502,7 +1502,7 @@ def edit_audio(
 
         return stream_data
 
-    stream = 0 if stream == "all" or stream == Sym("all") else stream
+    stream = 0 if stream == Sym("all") else stream
     return raise_(f"audio stream '{stream}' does not exist") if strict else levels.all()
 
 
@@ -1615,7 +1615,7 @@ def my_eval(env: Env, node: object) -> Any:
     "none": Proc("none", edit_none, (0, 0)),
     "all/e": Proc("all/e", edit_all, (0, 0)),
     "audio": Proc("audio", edit_audio, (0, 4),
-        is_threshold, orc(is_nat, Sym("all"), "all"), is_nat,
+        is_threshold, orc(is_nat, Sym("all")), is_nat,
         {"threshold": 0, "stream": 1, "minclip": 2, "mincut": 2}
     ),
     "motion": Proc("motion", edit_motion, (0, 4),