Fixing many misc Sentry reports on OpenShot 3.2

src/classes/waveform.py

@@ -112,7 +112,7 @@ def getAudioData(file, channel=-1, tid=None):
     file = File.get(id=file_id)
 
     # Only generate audio for readers that actually contain audio
-    if not file.data.get("has_audio", False):
+    if not file or not file.data.get("has_audio", False):
         log.info("File does not have audio. Skipping")
         return
 
@@ -163,6 +163,9 @@ def getAudioData(file, channel=-1, tid=None):
         # Loop through samples from the file, applying this clip's volume curve
         clip_audio_data = []
         clip_instance = get_app().window.timeline_sync.timeline.GetClip(clip.id)
+        if not clip_instance:
+            log.info("Clip not found, bailing out of waveform volume adjustments")
+            continue
         num_frames = clip_instance.info.video_length
 
         # Determine best guess # of samples (based on duration)

src/timeline/js/controllers.js

@@ -688,6 +688,11 @@ App.controller("TimelineCtrl", function ($scope) {
    * @return {string}
    */
   $scope.getThumbPath = function (clip) {
+    if (!clip || !clip.reader) {
+      console.error("Invalid clip object or missing reader property in getThumbPath");
+      return "../images/NotFound.svg";
+    }
+
     var has_video = clip["reader"]["has_video"];
     var has_audio = clip["reader"]["has_audio"];
     if (!has_video && has_audio) {

src/windows/add_to_timeline.py

@@ -326,7 +326,7 @@ def accept(self):
                 # Add transition for this clip (if any)
                 # Open up QtImageReader for transition Image
                 if random_transition:
-                    random_index = randint(0, len(self.transitions))
+                    random_index = randint(0, len(self.transitions) - 1)
                     transition_path = self.transitions[random_index]
 
                 # Get reader for transition

src/windows/models/properties_model.py

@@ -518,7 +518,7 @@ def value_updated(self, item, interpolation=-1, value=None, interpolation_detail
                     # Keyframe
 
                     # Protection from HUGE scale values
-                    if property_key in ['scale_x', 'scale_y', 'shear_x', 'shear_y']:
+                    if property_key in ['scale_x', 'scale_y', 'shear_x', 'shear_y'] and new_value:
                         width = get_app().project.get("width")
                         height = get_app().project.get("height")
                         is_svg = clip_data.get("reader", {}).get("path", "").lower().endswith("svg")

src/windows/video_widget.py

@@ -1436,6 +1436,10 @@ def __init__(self, watch_project=True, *args):
         self.leftHandle = None
         self.rightHandle = None
         self.centerHandle = None
+        self.topShearHandle = None
+        self.leftShearHandle = None
+        self.rightShearHandle = None
+        self.bottomShearHandle = None
         self.clipBounds = None
         self.originHandle = None
         self.mouse_pressed = False