[cli] Change default backend back to OpenCV on all platforms.

Author: Breakthrough

docs/changelog.md

@@ -39,6 +39,8 @@ The main goals of v0.6 are reliability and performance. To achieve this required
  * Frame numbers are now 1-based, and there is no longer any overlap between the start/end frame numbers of adjacent scenes
      * This also applies to the frame numbers in a statsfile (`-s`/`--stats`) and those provided by `list-scenes`
      * The output via the CLI now matches `ffmpeg` in all cases
+ * The default backend has been changed back to `opencv`
+     * To enable the `pyav` backend, either specify `-b pyav` via the command line, or set `backend = pyav` under `[global]` in your [config file](http://scenedetect.com/projects/Manual/en/v0.6/cli/config_file.html)
 
 *v0.6-dev3*:
 

manual/cli/backends.rst

@@ -12,7 +12,7 @@ PySceneDetect supports multiple backends for video input. Some can be configured
 OpenCV
 =======================================================================
 
-*[Default on Linux/OSX]*
+*[Default]*
 
 This backend, named ``opencv`` on the command line, uses OpenCV's VideoCapture object for video input. It is mostly reliable and fast, although can occasionally run into issues processing videos with multiple audio tracks or small amounts of frame corruption.
 
@@ -23,6 +23,6 @@ The OpenCV backend also supports image sequences as inputs (e.g. ``frame%02d.jpg
 PyAV
 =======================================================================
 
-*[Default on Windows]*
+The PyAV backend is a more robust backend that handles multiple audio tracks and frame decode errors gracefully.
 
-The PyAV backend is a more robust backend that can handle multiple audio tracks and decode errors more gracefully.
+This backend can be used by specifying `-b pyav` via command line, or setting `backend = pyav` under the `[global]` section of your :ref:`config file <scenedetect_cli-config_file>`.

scenedetect/cli/__init__.py

@@ -225,8 +225,8 @@ def _print_help_header() -> None:
     type=click.Choice(CHOICE_MAP["global"]["backend"]),
     default=None,
     help='Backend to use for video input. Backends can be configured using -c/--config. Backends'
-    ' available on this system: %s. Default is pyav on Windows, opencv on other platforms.' %
-    (', '.join(AVAILABLE_BACKENDS.keys())),
+    ' available on this system: %s.%s.' %
+    (', '.join(AVAILABLE_BACKENDS.keys()), USER_CONFIG.get_help_string("global", "backend")),
 )
 @click.option(
     '--config',

scenedetect/cli/config.py

@@ -109,7 +109,7 @@ def __str__(self) -> str:
         'skip-cuts': False,
     },
     'global': {
-        'backend': 'pyav' if os.name == 'nt' else 'opencv',
+        'backend': 'opencv',
         'downscale': 0,
         'drop-short-scenes': False,
         'frame-skip': 0,