fix(ui): use default audio icon if ffmpeg is absent (#471)

* fix(ThumbRenderer): Use audio icon when no ffmpeg

When ffmpeg is missing, Popen raises a FileNotFound error. This would
be caught as an Unlinked file and use the broken file icon. The
exception is now caught and a more appropriate exception is raised in
its place.

* ruff formatting

tagstudio/src/qt/helpers/vendored/pydub/audio_segment.py

@@ -1,7 +1,7 @@
 # type: ignore
 # Copyright (C) 2022  James Robert (jiaaro).
 # Licensed under the MIT License.
-# Vendored from ffmpeg-python and ffmpeg-python PR#790 by amamic1803
+# Vendored from pydub
 
 from __future__ import division
 
@@ -729,7 +729,10 @@ def is_format(f):
             info = None
         else:
             # PATCHED
-            info = _mediainfo_json(orig_file, read_ahead_limit=read_ahead_limit)
+            try:
+                info = _mediainfo_json(orig_file, read_ahead_limit=read_ahead_limit)
+            except FileNotFoundError:
+                raise ChildProcessError
         if info:
             audio_streams = [x for x in info['streams']
                              if x['codec_type'] == 'audio']
@@ -1400,4 +1403,4 @@ def _repr_html_(self):
                   """
         fh = self.export()
         data = base64.b64encode(fh.read()).decode('ascii')
-        return src.format(base64=data)
+        return src.format(base64=data)

tagstudio/src/qt/widgets/thumb_renderer.py

@@ -565,6 +565,7 @@ def _audio_waveform_thumb(
             logging.error(
                 f"[ThumbRenderer][WAVEFORM][ERROR]: Couldn't render waveform for {filepath.name} ({type(e).__name__})"
             )
+
         return im
 
     def _blender(self, filepath: Path) -> Image.Image:
@@ -1057,7 +1058,12 @@ def render(
                     size=(adj_size, adj_size),
                     pixel_ratio=pixel_ratio,
                 )
-            except (UnidentifiedImageError, DecompressionBombError, ValueError) as e:
+            except (
+                UnidentifiedImageError,
+                DecompressionBombError,
+                ValueError,
+                ChildProcessError,
+            ) as e:
                 logging.info(
                     f"[ThumbRenderer][ERROR]: Couldn't render thumbnail for {_filepath.name} ({type(e).__name__})"
                 )