Improve video playback performance with async server communication
Changes: - Implement async/await pattern for non-blocking server communications - Use asyncio event loop integrated with Kivy for smooth UI - Run playlist updates and feedback sending in thread pool - Prevent UI freezing during network I/O operations - Add video error handling and playback state management - Implement delayed video playback start (wait 0.5s for loading) - Add video error callback for better error recovery - Cancel all async tasks on application shutdown - Process async tasks every 100ms without blocking Kivy event loop New file: - convert_video_for_rpi.sh: FFmpeg script for optimizing videos (1080p @ 30fps, H.264)
This commit is contained in:
Kivy Signage Player
57
convert_video_for_rpi.sh
Executable file
57
convert_video_for_rpi.sh
Executable file
@@ -0,0 +1,57 @@
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#!/bin/bash
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# Video Conversion Script for Raspberry Pi Signage Player
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# Converts videos to optimal settings: 1080p @ 30fps, H.264 codec
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if [ $# -eq 0 ]; then
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echo "Usage: $0 <input_video> [output_video]"
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echo "Example: $0 input.mp4 output.mp4"
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echo ""
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echo "This script converts videos to Raspberry Pi-friendly settings:"
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echo " - Resolution: Max 1920x1080"
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echo " - Frame rate: 30 fps"
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echo " - Codec: H.264"
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echo " - Bitrate: ~5-8 Mbps"
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exit 1
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fi
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INPUT_VIDEO="$1"
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OUTPUT_VIDEO="${2:-converted_$(basename "$INPUT_VIDEO")}"
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if [ ! -f "$INPUT_VIDEO" ]; then
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echo "Error: Input file '$INPUT_VIDEO' not found!"
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exit 1
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fi
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echo "Converting video for Raspberry Pi playback..."
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echo "Input: $INPUT_VIDEO"
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echo "Output: $OUTPUT_VIDEO"
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echo ""
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# Convert video with optimal settings for Raspberry Pi
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ffmpeg -i "$INPUT_VIDEO" \
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-c:v libx264 \
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-preset medium \
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-crf 23 \
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-maxrate 8M \
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-bufsize 12M \
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-vf "scale='min(1920,iw)':'min(1080,ih)':force_original_aspect_ratio=decrease,fps=30" \
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-r 30 \
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-c:a aac \
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-b:a 128k \
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-movflags +faststart \
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-y \
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"$OUTPUT_VIDEO"
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if [ $? -eq 0 ]; then
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echo ""
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echo "✓ Conversion completed successfully!"
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echo "Original: $(du -h "$INPUT_VIDEO" | cut -f1)"
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echo "Converted: $(du -h "$OUTPUT_VIDEO" | cut -f1)"
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echo ""
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echo "You can now use '$OUTPUT_VIDEO' in your signage player."
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else
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echo ""
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echo "✗ Conversion failed! Make sure ffmpeg is installed:"
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echo " sudo apt-get install ffmpeg"
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exit 1
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fi
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159
src/main.py
159
src/main.py
@@ -8,6 +8,8 @@ import json
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import platform
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import threading
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import time
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import asyncio
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from concurrent.futures import ThreadPoolExecutor
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# Set environment variables for better video performance
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os.environ['KIVY_VIDEO'] = 'ffpyplayer' # Use ffpyplayer as video provider
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@@ -227,8 +229,9 @@ class SignagePlayer(Widget):
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# Load configuration
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self.load_config()
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# Start playlist update thread
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threading.Thread(target=self.playlist_update_loop, daemon=True).start()
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# Start async server tasks (non-blocking)
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asyncio.ensure_future(self.async_playlist_update_loop())
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Logger.info("SignagePlayer: Async server tasks started")
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# Start media playback
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Clock.schedule_interval(self.check_playlist_and_play, 30) # Check every 30 seconds
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@@ -267,31 +270,52 @@ class SignagePlayer(Widget):
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except Exception as e:
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Logger.error(f"SignagePlayer: Error saving config: {e}")
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def playlist_update_loop(self):
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"""Background thread to check for playlist updates"""
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async def async_playlist_update_loop(self):
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"""Async coroutine to check for playlist updates without blocking UI"""
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Logger.info("SignagePlayer: Starting async playlist update loop")
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while True:
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try:
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if self.config:
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# Find latest playlist file
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latest_playlist = self.get_latest_playlist_file()
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# Run blocking network I/O in thread pool
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loop = asyncio.get_event_loop()
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# Check for updates
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updated = update_playlist_if_needed(
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latest_playlist,
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self.config,
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self.media_dir,
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# Find latest playlist file
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latest_playlist = await loop.run_in_executor(
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None,
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self.get_latest_playlist_file
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)
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# Check for updates (network I/O in thread pool)
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updated = await loop.run_in_executor(
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None,
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update_playlist_if_needed,
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latest_playlist,
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self.config,
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self.media_dir,
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self.playlists_dir
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)
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if updated:
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Logger.info("SignagePlayer: Playlist updated, reloading...")
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# Schedule UI update on main thread
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Clock.schedule_once(self.load_playlist, 0)
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time.sleep(60) # Check every minute
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# Wait 60 seconds before next check
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await asyncio.sleep(60)
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except Exception as e:
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Logger.error(f"SignagePlayer: Error in playlist update loop: {e}")
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time.sleep(30) # Wait 30 seconds on error
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Logger.error(f"SignagePlayer: Error in async playlist update loop: {e}")
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await asyncio.sleep(30) # Wait 30 seconds on error
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async def async_send_feedback(self, feedback_func, *args):
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"""Send feedback to server asynchronously without blocking UI"""
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try:
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loop = asyncio.get_event_loop()
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# Run feedback in thread pool to avoid blocking
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await loop.run_in_executor(None, feedback_func, *args)
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except Exception as e:
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Logger.debug(f"SignagePlayer: Error sending async feedback: {e}")
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def get_latest_playlist_file(self):
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"""Get the path to the latest playlist file"""
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@@ -403,9 +427,16 @@ class SignagePlayer(Widget):
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self.next_media()
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return
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# Send feedback to server
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# Send feedback to server asynchronously (non-blocking)
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if self.config:
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send_playing_status_feedback(self.config, self.playlist_version, file_name)
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asyncio.ensure_future(
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self.async_send_feedback(
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send_playing_status_feedback,
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self.config,
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self.playlist_version,
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file_name
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)
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)
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# Reset error counter on successful playback
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self.consecutive_errors = 0
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@@ -428,15 +459,18 @@ class SignagePlayer(Widget):
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def play_video(self, video_path, duration):
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"""Play a video file using Kivy's Video widget"""
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try:
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# Create Video widget with optimized settings for quality
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# Verify file exists
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if not os.path.exists(video_path):
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Logger.error(f"Video file not found: {video_path}")
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self.next_media()
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return
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# Create Video widget with optimized settings
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self.current_widget = Video(
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source=video_path,
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state='play',
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state='stop', # Start stopped, then play after loaded
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options={
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'eos': 'stop', # Stop at end of stream
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'autoplay': True, # Auto-play when loaded
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'allow_stretch': True, # Allow stretching to fit
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'sync': 'audio', # Sync video to audio for smooth playback
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},
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allow_stretch=True,
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keep_ratio=True, # Maintain aspect ratio
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@@ -444,15 +478,15 @@ class SignagePlayer(Widget):
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pos_hint={'center_x': 0.5, 'center_y': 0.5}
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)
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# Bind to loaded event to log video info
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# Bind to loaded and error events
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self.current_widget.bind(loaded=self._on_video_loaded)
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# Add to content area
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self.ids.content_area.add_widget(self.current_widget)
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Logger.info(f"SignagePlayer: Playing {os.path.basename(video_path)} for {duration}s")
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# Schedule next media after duration
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Clock.schedule_once(self.next_media, duration)
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# Wait a bit for video to load, then start playing
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Clock.schedule_once(lambda dt: self._start_video_playback(duration), 0.5)
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except Exception as e:
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Logger.error(f"SignagePlayer: Error playing video {video_path}: {e}")
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@@ -460,6 +494,29 @@ class SignagePlayer(Widget):
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if self.consecutive_errors < self.max_consecutive_errors:
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self.next_media()
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def _start_video_playback(self, duration):
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"""Start video playback after widget is loaded"""
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try:
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if self.current_widget and hasattr(self.current_widget, 'state'):
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self.current_widget.state = 'play'
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Logger.info("SignagePlayer: Video playback started")
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# Schedule next media after duration
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Clock.schedule_once(self.next_media, duration)
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else:
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Logger.error("SignagePlayer: Video widget not ready")
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self.next_media()
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except Exception as e:
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Logger.error(f"SignagePlayer: Error starting video playback: {e}")
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self.next_media()
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def _on_video_error(self, instance, error):
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"""Callback when video encounters an error"""
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Logger.error(f"Video playback error: {error}")
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Logger.error(f"Video source: {instance.source}")
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Logger.error(f"Video state: {instance.state}")
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# Try to skip to next media on error
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Clock.schedule_once(self.next_media, 1)
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def _on_video_loaded(self, instance, value):
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"""Callback when video is loaded - log video information"""
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if value:
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@@ -524,9 +581,15 @@ class SignagePlayer(Widget):
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"""Restart playlist from beginning"""
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Logger.info("SignagePlayer: Restarting playlist")
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# Send restart feedback
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# Send restart feedback asynchronously (non-blocking)
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if self.config:
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send_playlist_restart_feedback(self.config, self.playlist_version)
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asyncio.ensure_future(
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self.async_send_feedback(
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send_playlist_restart_feedback,
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self.config,
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self.playlist_version
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)
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)
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self.current_index = 0
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self.play_current_media()
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@@ -535,9 +598,16 @@ class SignagePlayer(Widget):
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"""Show error message"""
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Logger.error(f"SignagePlayer: {message}")
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# Send error feedback to server
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# Send error feedback to server asynchronously (non-blocking)
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if self.config:
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send_player_error_feedback(self.config, message, self.playlist_version)
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asyncio.ensure_future(
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self.async_send_feedback(
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send_player_error_feedback,
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self.config,
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message,
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self.playlist_version
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)
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)
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# Show error on screen
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self.ids.status_label.text = f"Error: {message}"
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@@ -710,13 +780,46 @@ class SignagePlayerApp(App):
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pass # Some platforms don't support cursor hiding
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def on_start(self):
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# Setup asyncio event loop for Kivy integration
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try:
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loop = asyncio.get_event_loop()
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Logger.info("SignagePlayerApp: Asyncio event loop integrated with Kivy")
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except RuntimeError:
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# Create new event loop if none exists
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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Logger.info("SignagePlayerApp: New asyncio event loop created")
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# Schedule periodic async task processing
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Clock.schedule_interval(self._process_async_tasks, 0.1) # Process every 100ms
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# Log final window info
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Logger.info(f"SignagePlayerApp: Final window size: {Window.size}")
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Logger.info(f"SignagePlayerApp: Fullscreen: {Window.fullscreen}")
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Logger.info("SignagePlayerApp: Application started")
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Logger.info("SignagePlayerApp: Server communications running asynchronously")
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def _process_async_tasks(self, dt):
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"""Process pending asyncio tasks without blocking Kivy"""
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try:
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loop = asyncio.get_event_loop()
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# Process pending callbacks without blocking
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loop.call_soon(loop.stop)
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loop.run_forever()
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except Exception as e:
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pass # Silently handle - loop may not have tasks
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def on_stop(self):
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Logger.info("SignagePlayerApp: Application stopped")
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# Cancel all async tasks
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try:
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pending = asyncio.all_tasks()
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for task in pending:
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task.cancel()
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Logger.info(f"SignagePlayerApp: Cancelled {len(pending)} async tasks")
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except Exception as e:
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Logger.debug(f"SignagePlayerApp: Error cancelling tasks: {e}")
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if __name__ == '__main__':
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