conversion_project/IMPLEMENTATION_COMPLETE.md

Interactive Audio Stream Selection - Complete Implementation

Overview

✅ COMPLETE - Interactive audio stream selection feature has been successfully implemented.

Users can now view all available audio streams in each video file and select which ones to keep for encoding, providing fine-grained control over audio track inclusion.

Features Implemented

1. Stream Display ✅

• Shows all audio streams with human-readable format
• Displays: Stream number, channel count, language code, bitrate
• Clear visual separation and organized layout
• Example: Stream #0: 2ch | Lang: eng | Bitrate: 128kbps

2. User Input ✅

• Accepts comma-separated stream indices: 0,1,3
• Accepts single stream: 1
• Accepts blank input (keep all streams)
• Input validation with helpful error messages
• Optional spaces in comma-separated list: 0, 1, 3

3. Filtering ✅

• Removes non-selected streams from encoding
• Preserves original stream indices for FFmpeg mapping
• Logs all selections and removals
• Falls back to keeping all streams on invalid input

4. CLI Integration ✅

• New flag: --interactive (boolean)
• Works with --filter-audio flag
• Can be used independently (auto-enables filtering)
• Integrated into argument parser with help text

5. Processing Pipeline ✅

• Called from run_ffmpeg() in encode_engine.py
• Executed after stream detection
• Executed before codec selection
• Per-file prompting (allows different selections per video)

6. Logging ✅

• Logs user selections: User selected X audio stream(s): [0, 1, 3]
• Logs removed streams: Removed X audio stream(s): [2]
• Logs invalid input attempts
• Integrated with project's logging system

File Changes Summary

main.py

Added:

• --interactive argument to argparse
• Pass args.interactive_audio to process_folder()

Lines Changed: 2

core/process_manager.py

Added:

• interactive_audio: bool = False parameter to function signature
• Logic to set audio_filter_config["interactive"] based on CLI args
• Auto-enable filtering if --interactive used without --filter-audio

Lines Changed: ~5

core/encode_engine.py

Added:

• Import prompt_user_audio_selection
• Check for audio_filter_config.get("interactive", False)
• Route to interactive or automatic filtering accordingly

Lines Changed: ~5

core/audio_handler.py

Added:

• prompt_user_audio_selection() function (64 lines)
• Comprehensive docstring
• User-friendly output formatting
• Input validation and error handling
• Logging integration

Lines Changed: +64 (new function)

Code Structure

Function: prompt_user_audio_selection(streams: list) -> list

Location: core/audio_handler.py (line 297)

Parameters:

• streams: List of (index, channels, bitrate, language, metadata) tuples

Returns:

• Filtered list containing only user-selected streams

Key Features:

1. Early return if 0-1 streams (no selection needed)
2. Display header with visual formatting
3. Show each stream with index, channels, language, bitrate
4. Prompt for user input with examples
5. Parse comma-separated input
6. Validate stream indices
7. Handle edge cases (empty input, invalid input)
8. Log results to project logger
9. Return filtered streams ready for encoding

Error Handling:

• ValueError on unparseable input → keep all
• No valid selections → keep all with warning
• Empty input → keep all (user confirmed)

Execution Flow

User runs:
$ python main.py "C:\Videos" --filter-audio --interactive

↓

main.py parses arguments
  - filter_audio = True (from --filter-audio)
  - interactive_audio = True (from --interactive)

↓

process_folder() called with both flags

↓

For each video file:
  └─ run_ffmpeg() called
     └─ get_audio_streams() detects streams
     └─ Check audio_filter_config.enabled
        └─ True: Apply filtering
           └─ Check audio_filter_config.interactive
              └─ True: Call prompt_user_audio_selection()
                  └─ [INTERACTIVE PROMPT APPEARS]
                  └─ User sees streams and selects
                  └─ Returns filtered stream list
              └─ False: Call filter_audio_streams()
                  └─ Automatic filtering (keep best English + Commentary)
     └─ Process selected streams for encoding

Usage Examples

Basic Interactive Mode

python main.py "C:\Videos\Movies" --filter-audio --interactive

Combined with Other Options

python main.py "C:\Videos\TV" --filter-audio --interactive --cq 28 --r 1080 --language eng

Interactive Without Explicit --filter-audio

python main.py "C:\Videos\Anime" --interactive

(Filtering is auto-enabled with interactive mode)

Testing Scenarios

Scenario 1: Multiple Audio Languages

Input: Video with English (stereo), English (5.1), Spanish, Commentary Expected: Prompt shows 4 streams, user can select any combination

Scenario 2: Invalid Selection

Input: User types "abc" or non-existent stream number Expected: Tool logs warning, keeps all streams, continues

Scenario 3: Single Audio Stream

Input: Video with only one audio track Expected: Function returns early, no prompt shown

Scenario 4: Empty Input

Input: User presses Enter without typing Expected: All streams kept, confirmation message shown

Backward Compatibility

✅ Fully Backward Compatible

• Existing --filter-audio behavior unchanged
• New feature is opt-in via --interactive flag
• Default behavior (no interactive) preserved
• No changes to config.xml schema required
• All existing scripts/automation continues to work

Integration Points

With Audio Language Tagging

• --language eng --filter-audio --interactive works together
• User selects streams, then language metadata applied to all

With Resolution/CQ Options

• --filter-audio --interactive --cq 28 --r 1080 fully compatible
• Interactive selection happens first, encoding follows

With Test Mode

• --filter-audio --interactive --test shows interactive prompt on first file
• Useful for testing selections before batch encoding

Performance Impact

✅ Minimal Impact

• Interactive prompt only appears when user explicitly requests it
• No performance overhead when --interactive not used
• Per-file prompt adds negligible time (user wait for input)
• No change to FFmpeg encoding performance

Documentation Provided

1. INTERACTIVE_AUDIO.md - User guide with examples
2. IMPLEMENTATION_NOTES.md - Technical implementation details
3. QUICK_REFERENCE.md - Quick reference guide and FAQ
4. This summary document

Completion Checklist

✅ Function implementation (prompt_user_audio_selection) ✅ CLI argument (--interactive) ✅ Integration with process_manager ✅ Integration with encode_engine ✅ Input validation ✅ Error handling ✅ Logging integration ✅ Backward compatibility ✅ Documentation ✅ Syntax validation ✅ Code review

Example Output

When user runs with --filter-audio --interactive:

================================================================================
🎵 AUDIO STREAM SELECTION
================================================================================

Stream #0: 2ch | Lang: eng | Bitrate: 128kbps

Stream #1: 6ch | Lang: eng | Bitrate: 448kbps

Stream #2: 2ch | Lang: spa | Bitrate: 128kbps

Stream #3: 2ch | Lang: comment | Bitrate: 64kbps

────────────────────────────────────────────────────────────────────────────
Enter stream numbers to keep (comma-separated, e.g.: 1,2 or just 2)
Leave blank to keep all streams
────────────────────────────────────────────────────────────────────────────
➜ Keep streams: 1,3
✅ Keeping 2 stream(s), removing 2 stream(s)

🎬 Running CQ encode: output.mkv
...

Next Steps (Optional Enhancements)

Future improvements could include:

• Preset buttons for common selections (e.g., "Best Audio", "English Only", "All")
• Auto-numbering display for clarity
• Arrow key selection interface (more interactive)
• Save/load selection templates for batch consistency
• GUI interface for stream selection
• Default selection from config for silent/batch operation

---

Summary

The interactive audio stream selection feature is complete and ready for use. Users can now:

1. ✅ See all available audio streams with details
2. ✅ Choose which streams to keep for encoding
3. ✅ Get immediate confirmation of their selection
4. ✅ Have per-file control in batch operations
5. ✅ Maintain automatic fallback if input is invalid

The implementation is clean, well-documented, backward-compatible, and fully integrated into the existing codebase.