dave/py-media-grader
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"optimnize" playback by removing retardation

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PhatPhuckDave
2025-09-18 17:36:41 +02:00
parent 0fd108bc9a
commit f9f442a2d0
1 changed files with 24 additions and 13 deletions
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37
croppa/main.py
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@@ -459,8 +459,8 @@ class ProjectView:
class VideoEditor:
# Configuration constants
BASE_FRAME_DELAY_MS = 1 # ~60 FPS
SPEED_INCREMENT = 0.2
MIN_PLAYBACK_SPEED = 0.1
SPEED_INCREMENT = 0.1
MIN_PLAYBACK_SPEED = 0.05
MAX_PLAYBACK_SPEED = 10.0
# Seek multiplier configuration
@@ -983,8 +983,19 @@ class VideoEditor:
def calculate_frame_delay(self) -> int:
"""Calculate frame delay in milliseconds based on playback speed"""
delay_ms = int(self.BASE_FRAME_DELAY_MS / self.playback_speed)
return max(1, delay_ms)
# Round to 2 decimals to handle floating point precision issues
speed = round(self.playback_speed, 2)
print(f"Playback speed: {speed}")
if speed >= 1.0:
# Speed >= 1: maximum FPS (no delay)
return 1
else:
# Speed < 1: scale FPS based on speed
# At 0.05 speed = 3 FPS, at 1.0 speed = 60 FPS
# Formula: fps = 60 * speed, so delay = 1000 / fps
target_fps = 80 * speed
delay_ms = int(1000 / target_fps)
return max(1, delay_ms)
def seek_video(self, frames_delta: int):
"""Seek video by specified number of frames"""
@@ -1166,9 +1177,8 @@ class VideoEditor:
if not self.is_playing:
return True
# Calculate how many frames to advance based on speed
frames_to_advance = max(1, int(self.playback_speed))
new_frame = self.current_frame + frames_to_advance
# Always advance by 1 frame - speed is controlled by delay timing
new_frame = self.current_frame + 1
# Handle marker looping bounds
if self.looping_between_markers and self.cut_start_frame is not None and self.cut_end_frame is not None:
@@ -3045,10 +3055,15 @@ class VideoEditor:
# Use calculated frame delay for proper playback speed
delay_ms = self.calculate_frame_delay()
else:
# Use minimal delay when not playing for responsive UI
delay_ms = 1
# Use non-blocking wait for immediate responsiveness when not playing
delay_ms = 0
# Auto advance frame when playing (videos only)
if self.is_playing and not self.is_image_mode:
self.advance_frame()
# Key capture with appropriate delay
print(f"Delay ms: {delay_ms}")
key = cv2.waitKey(delay_ms) & 0xFF
# Route keys based on window focus
@@ -3302,10 +3317,6 @@ class VideoEditor:
print(f"Contracted crop from left by {self.crop_size_step}px")
# Auto advance frame when playing (videos only)
if self.is_playing and not self.is_image_mode:
self.advance_frame()
self.save_state()
self.cleanup_render_thread()
if hasattr(self, 'cap') and self.cap: