Simple GUI toolset for FFmpeg
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Stu Leak 68ce3c2168 Document and fix player module stuttering issues
Performance Analysis:
- Created PLAYER_PERFORMANCE_ISSUES.md with root cause analysis
- Identified 6 major issues causing stuttering
- Provided priority-ordered fix recommendations

Quick Fixes Implemented (Priority 1):
- Increase audio buffer: 2048 → 8192 samples (42ms → 170ms)
- Increase audio chunk size: 4096 → 16384 bytes (21ms → 85ms)
- Reduces audio underruns and stuttering significantly

Root Causes Documented:
1. Separate video/audio FFmpeg processes (no A/V sync)
2. Tiny audio buffers causing underruns
3. CPU waste on per-sample volume processing
4. Frame timing drift with no correction mechanism
5. UI thread blocking every frame update
6. Memory allocation on every frame (GC pressure)

Remaining Work (Requires More Time):
- Priority 2: Move volume control to FFmpeg (remove hot path processing)
- Priority 3: Single FFmpeg process for perfect A/V sync
- Priority 4: Frame buffer pooling to reduce GC pressure
- Priority 5: Adaptive frame timing with drift correction

Testing Checklist Provided:
- Frame rate support (24/30/60 fps)
- A/V sync validation
- Codec compatibility
- CPU usage benchmarking

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2025-12-23 21:09:21 -05:00
assets/logo Enhance Author module structure and implement drag-and-drop support 2025-12-22 20:09:43 -05:00
cmd/player_demo Implement VT_Player module with frame-accurate video playback 2025-12-21 16:31:44 -05:00
docs Add lightweight roadmap and clarify dev workflow 2025-12-23 14:35:05 -05:00
internal Add authoring log/progress and queue job 2025-12-23 20:47:10 -05:00
scripts Update Windows build guide for Git Bash users 2025-12-23 20:55:47 -05:00
.gitattributes Enforce LF endings for shell scripts 2025-12-13 21:30:17 -05:00
.gitignore Turned GIT Converter Modular 2025-12-14 03:00:44 +00:00
author_dvd_functions.go Finalize authoring workflow and update install docs 2025-12-23 14:24:09 -05:00
author_module.go Default author output path without dialogs 2025-12-23 21:06:49 -05:00
DONE.md Polish menu header and Windows DVDStyler download 2025-12-23 18:30:35 -05:00
FyneApp.toml Mark dev20 across metadata 2025-12-23 14:39:44 -05:00
go.mod Implement in-app playback with ffmpeg frame pump and Go audio 2025-11-20 16:11:56 -05:00
go.sum Implement in-app playback with ffmpeg frame pump and Go audio 2025-11-20 16:11:56 -05:00
inspect_module.go Extract inspect module from main.go 2025-12-23 20:51:42 -05:00
main.go Document and fix player module stuttering issues 2025-12-23 21:09:21 -05:00
naming_helpers.go Add queue error copy, auto naming helper, and metadata templating 2025-12-07 12:03:21 -05:00
platform.go Hide ffmpeg console windows on Windows and fix inspect clear button 2025-12-08 11:26:14 -05:00
PLAYER_PERFORMANCE_ISSUES.md Document and fix player module stuttering issues 2025-12-23 21:09:21 -05:00
README.md Update README.md 2025-12-24 00:31:55 +00:00
setup-windows.bat Add dev14 fixes: progress tracking, AMD AMF support, DVD resolution fix, and Windows build automation 2025-12-04 17:11:15 -05:00
subtitles_module.go Add subtitles module with offline STT 2025-12-23 18:30:27 -05:00
TODO.md Mark dev20 across metadata 2025-12-23 14:39:44 -05:00
VideoTools.desktop Add app icon support and window sizing improvements 2025-12-20 14:13:18 -05:00
WINDOWS_BUILD_PERFORMANCE.md Update Windows build guide for Git Bash users 2025-12-23 20:55:47 -05:00

VideoTools - Video Processing Suite

What is VideoTools?

VideoTools is a professional-grade video processing application with a modern GUI. It specializes in creating DVD-compliant videos for authoring and distribution.

Key Features

DVD-NTSC & DVD-PAL Output

  • Professional MPEG-2 encoding (720×480 @ 29.97fps for NTSC, 720×576 @ 25fps for PAL)
  • AC-3 Dolby Digital audio (192 kbps, 48 kHz)
  • DVDStyler compatible (no re-encoding warnings)
  • PS2 compatible (PS2-safe bitrate limits)
  • Region-free format (works worldwide)

Batch Processing

  • Queue multiple videos
  • Pause/resume jobs
  • Real-time progress tracking
  • Job history and persistence

Smart Features

  • Automatic framerate conversion (23.976p, 24p, 30p, 60p, VFR → 29.97fps)
  • Automatic audio resampling (any rate → 48 kHz)
  • Aspect ratio preservation with intelligent handling
  • Comprehensive validation with helpful warnings

Quick Start

Installation (One Command)

bash scripts/install.sh

The installer will build, install, and set up everything automatically with a guided wizard!

After installation:

source ~/.bashrc    # (or ~/.zshrc for zsh)
VideoTools

Alternative: Developer Setup

If you already have the repo cloned (dev workflow):

cd /path/to/VideoTools
bash scripts/build.sh
bash scripts/run.sh

For detailed installation options, troubleshooting, and platform-specific notes, see INSTALLATION.md. For upcoming work and priorities, see docs/ROADMAP.md.

How to Create a Professional DVD

  1. Start VideoToolsVideoTools
  2. Load a video → Drag & drop into Convert module
  3. Select format → Choose "DVD-NTSC (MPEG-2)" or "DVD-PAL (MPEG-2)"
  4. Choose aspect → Select 4:3 or 16:9
  5. Name output → Enter filename (without .mpg)
  6. Queue → Click "Add to Queue"
  7. Encode → Click "View Queue" → "Start Queue"
  8. Export → Use the .mpg file in DVDStyler

Output is professional quality, ready for:

  • DVDStyler authoring (no re-encoding needed)
  • DVD menu creation
  • Burning to disc
  • PS2 playback

Documentation

Getting Started:

  • INSTALLATION.md - Comprehensive installation guide (read this first!)

For Users:

  • BUILD_AND_RUN.md - How to build and run VideoTools
  • DVD_USER_GUIDE.md - Complete guide to DVD encoding

For Developers:

  • DVD_IMPLEMENTATION_SUMMARY.md - Technical specifications
  • INTEGRATION_GUIDE.md - System architecture and integration
  • QUEUE_SYSTEM_GUIDE.md - Queue system reference

Requirements

  • Go 1.21+ (for building)
  • FFmpeg (for video encoding)
  • X11 or Wayland display server (for GUI)

System Architecture

VideoTools has a modular architecture:

  • internal/convert/ - DVD and video encoding
  • internal/queue/ - Job queue system
  • internal/ui/ - User interface components
  • internal/player/ - Media playback
  • scripts/ - Build and run automation

Commands

Build & Run

# One-time setup
source scripts/alias.sh

# Run the application
VideoTools

# Force rebuild
VideoToolsRebuild

# Clean build artifacts
VideoToolsClean

Legacy (Direct commands)

# Build
go build -o VideoTools .

# Run
./VideoTools

# Run with debug logging
VIDEOTOOLS_DEBUG=1 ./VideoTools

# View logs
go run . logs

Troubleshooting

  • See BUILD_AND_RUN.md for detailed troubleshooting
  • Check videotools.log for detailed error messages
  • Use VIDEOTOOLS_DEBUG=1 for verbose logging

Professional Use Cases

  • Home video archival to physical media
  • Professional DVD authoring workflows
  • Multi-region video distribution
  • Content preservation on optical media
  • PS2 compatible video creation

Professional Quality Specifications

DVD-NTSC

  • Resolution: 720 × 480 pixels
  • Framerate: 29.97 fps (NTSC standard)
  • Video: MPEG-2 codec, 6000 kbps
  • Audio: AC-3 stereo, 192 kbps, 48 kHz
  • Regions: USA, Canada, Japan, Australia

DVD-PAL

  • Resolution: 720 × 576 pixels
  • Framerate: 25.00 fps (PAL standard)
  • Video: MPEG-2 codec, 8000 kbps
  • Audio: AC-3 stereo, 192 kbps, 48 kHz
  • Regions: Europe, Africa, Asia, Australia

Getting Help

  1. Read BUILD_AND_RUN.md for setup issues
  2. Read DVD_USER_GUIDE.md for how-to questions
  3. Check videotools.log for error details
  4. Review documentation in project root