Handle stream.duration being None

Author: WyattBlue

Diff for: auto_editor/analyze.py

@@ -244,7 +244,10 @@ def motion_levels(
     stream = container.streams.video[mobj.stream]
     stream.thread_type = "AUTO"
 
-    inaccurate_dur = int(stream.duration * stream.time_base * stream.average_rate)
+    if stream.duration is None:
+        inaccurate_dur = 1
+    else:
+        inaccurate_dur = int(stream.duration * stream.time_base * stream.average_rate)
 
     bar.start(inaccurate_dur, "Analyzing motion")
 
@@ -325,7 +328,10 @@ def pixeldiff_levels(
     stream = container.streams.video[pobj.stream]
     stream.thread_type = "AUTO"
 
-    inaccurate_dur = int(stream.duration * stream.time_base * stream.average_rate)
+    if stream.duration is None:
+        inaccurate_dur = 1
+    else:
+        inaccurate_dur = int(stream.duration * stream.time_base * stream.average_rate)
 
     bar.start(inaccurate_dur, "Analyzing pixel diffs")