From 1ba29ef786cfa549b8a2360ca3e03682a3016b99 Mon Sep 17 00:00:00 2001
From: medusa <newton214@gmail.com>
Date: Sun, 27 Jul 2025 10:33:21 -0500
Subject: [PATCH] Update tech_docs/dvd_rip.md

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 tech_docs/dvd_rip.md | 204 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 204 insertions(+)

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+Here's the complete cleaned-up documentation following the optimized structure:
+
+---
+
+# **DVD Ripping Workflow Documentation**  
+*Last Updated: [DATE]*  
+
+## **1. Introduction**  
+### **Purpose**  
+A reliable, lossless method to rip DVDs to MKV files while preserving original quality and all audio/subtitle tracks.  
+
+### **Requirements**  
+- Linux system with DVD drive  
+- sudo/root access for mounting  
+- 2x DVD storage space for temporary files  
+
+### **Tool Overview**  
+| Tool | Purpose |  
+|------|---------|  
+| `vobcopy` | Simple DVD extraction |  
+| `dvdbackup` | Advanced title selection |  
+| `ffmpeg` | Video conversion/merging |  
+| `lsdvd` | DVD structure analysis |  
+| `mpv` | Playback verification |  
+
+---
+
+## **2. Installation**  
+### **Core Tools**  
+```bash  
+sudo apt update  
+sudo apt install vobcopy dvdbackup ffmpeg lsdvd  
+```  
+
+### **Optional Playback Support**  
+```bash  
+sudo apt install mpv  
+```  
+
+---
+
+## **3. Basic Ripping Workflow**  
+### **3.1 Mount DVD (If Not Auto-Mounted)**  
+```bash  
+sudo mkdir -p /mnt/dvd  
+sudo mount /dev/sr0 /mnt/dvd  
+```  
+
+### **3.2 Identify Main Title**  
+```bash  
+lsdvd /dev/sr0 | grep -A 5 'Longest track'  
+```  
+*Output shows title number, duration, and chapters*  
+
+### **3.3 Ripping Methods**  
+#### **Method A: vobcopy (Recommended for Simplicity)**  
+```bash  
+vobcopy -l -m -o ~/dvd_rips  
+```  
+**Flags**:  
+- `-l`: Large file support (>2GB)  
+- `-m`: Mirror DVD structure  
+- `-o`: Output directory  
+
+#### **Method B: dvdbackup (For Title Selection)**  
+```bash  
+dvdbackup -i /dev/sr0 -o ~/dvd_rip -t <TITLE_NUM> -M  
+```  
+**Flags**:  
+- `-t`: Specify title number  
+- `-M`: Main feature mode  
+
+### **3.4 Convert to MKV**  
+```bash  
+ffmpeg -err_detect ignore_err \  
+       -i "concat:INPUT.VOB" \  
+       -map 0:v -map 0:a -map 0:s? \  
+       -c copy \  
+       output.mkv  
+```  
+**Key Options**:  
+- `ignore_err`: Skip corrupted sectors  
+- `-map`: Include all streams  
+- `-c copy`: No re-encoding  
+
+---
+
+## **4. Advanced Techniques**  
+### **4.1 Batch Processing**  
+```bash  
+for vob in ~/dvd_rips/VIDEO_TS/VTS_*.VOB; do  
+    ffmpeg -err_detect ignore_err -i "$vob" \  
+           -c copy "${vob%.VOB}.mkv"  
+done  
+```  
+
+### **4.2 Multi-Title Extraction**  
+```bash  
+for title in $(lsdvd /dev/sr0 | grep 'Title' | awk '{print $2}' | tr -d ','); do  
+    vobcopy -l -n $title -i /mnt/dvd -o ~/dvd_titles  
+done  
+```  
+
+### **4.3 Error Recovery**  
+```bash  
+ffmpeg -err_detect aggressive -i corrupted.VOB \  
+       -c:v libx264 -crf 18 -preset slow \  
+       -c:a copy \  
+       repaired.mkv  
+```  
+
+---
+
+## **5. Verification**  
+### **5.1 Quick Integrity Check**  
+```bash  
+ffprobe -v error -show_format output.mkv  
+```  
+
+### **5.2 Stream Comparison**  
+```bash  
+ffprobe -show_streams file1.mkv > file1.txt  
+ffprobe -show_streams file2.mkv > file2.txt  
+diff -y file1.txt file2.txt | colordiff  
+```  
+
+### **5.3 Playback Test**  
+```bash  
+mpv --untimed --frames=100 output.mkv  
+```  
+
+---
+
+## **6. Playback Options**  
+### **6.1 Basic Playback**  
+```bash  
+mpv output.mkv  
+```  
+
+### **6.2 Advanced Controls**  
+| Key | Action |  
+|-----|--------|  
+| `→`/`←` | Seek ±5 sec |  
+| `Space` | Pause/Play |  
+| `#` | Cycle audio tracks |  
+| `j` | Next subtitle |  
+| `f` | Fullscreen |  
+
+### **6.3 Hardware Acceleration**  
+```bash  
+mpv --hwdec=vaapi --vo=gpu output.mkv  
+```  
+
+---
+
+## **7. Troubleshooting**  
+### **Common Issues**  
+**Problem**: `vobcopy` fails with "Cannot open /dev/dvd"  
+**Solution**:  
+```bash  
+sudo chmod +r /dev/sr0  
+```  
+
+**Problem**: Broken VOB files  
+**Solution**: Force ffmpeg processing:  
+```bash  
+ffmpeg -fflags +genpts -i broken.VOB -c copy fixed.mkv  
+```  
+
+---
+
+## **Appendices**  
+### **A. Command Quick Reference**  
+```bash  
+# Rip entire DVD  
+vobcopy -l -m -o ~/dvd_rips  
+
+# Extract specific title  
+dvdbackup -t 3 -M -o ~/dvd_rip  
+
+# Verify streams  
+ffprobe -show_streams video.mkv  
+```  
+
+### **B. FAQ**  
+**Q**: How to preserve subtitles?  
+**A**: Use `-map 0:s?` in ffmpeg  
+
+**Q**: Why MKV over MP4?  
+**A**: MKV supports DVD subtitles and multiple audio tracks natively  
+
+---
+
+This documentation:  
+✅ Removes all redundancy  
+✅ Organizes workflows logically  
+✅ Provides consistent formatting  
+✅ Includes troubleshooting  
+✅ Offers quick-reference sections  
+
+Let me know if you'd like any section expanded or additional details added!
+
+---
+
 You're right - I misunderstood your request. Let me reset and provide exactly what you need for reliable DVD ripping without playback complications.
 
 ### **Bulletproof DVD Ripping Workflow**