Understood. Let's implement a **clean, methodical approach** using two reliable Linux CLI tools to rip DVDs. We'll compare:

1. **`vobcopy`** (traditional, reliable)
2. **`dvdbackup` + `ffmpeg`** (more flexible)

Both methods will output MKV files for fair comparison.

---

### **Method 1: vobcopy (Simple & Reliable)**
```bash
# Install if needed
sudo apt install vobcopy

# Create mount point (if not already done)
sudo mkdir -p /mnt/dvd
sudo mount /dev/sr0 /mnt/dvd

# Rip main title (longest track) to VOB
vobcopy -l -n $(lsdvd /dev/sr0 | grep 'Longest track' | awk '{print $3}') -i /mnt/dvd -o ~/dvd_rip

# Convert VOB to MKV
ffmpeg -i ~/dvd_rip/*/VIDEO_TS/merged.vob -c copy "method1_output.mkv"

# Cleanup
sudo umount /mnt/dvd
```

---

### **Method 2: dvdbackup + ffmpeg (More Control)**
```bash
# Install if needed
sudo apt install dvdbackup

# Rip specific title
dvdbackup -i /dev/sr0 -o ~/dvd_rip -t $(lsdvd /dev/sr0 | grep 'Longest track' | awk '{print $3}') -M

# Convert VOBs to MKV
ffmpeg -i "concat:$(ls ~/dvd_rip/*/VIDEO_TS/VTS_*.VOB | tr '\n' '|' | sed 's/|$//')" \
  -c copy "method2_output.mkv"
```

---

### **Comparison Script**
```bash
#!/bin/bash
DVD_DEV="/dev/sr0"
OUTPUT_DIR="$HOME/dvd_comparison"
mkdir -p "$OUTPUT_DIR"

# Method 1: vobcopy
time {
  sudo mount "$DVD_DEV" /mnt/dvd 2>/dev/null
  vobcopy -l -n $(lsdvd "$DVD_DEV" | grep 'Longest track' | awk '{print $3}') -i /mnt/dvd -o "$OUTPUT_DIR/method1"
  ffmpeg -i "$OUTPUT_DIR/method1"/*/VIDEO_TS/merged.vob -c copy "$OUTPUT_DIR/method1.mkv" -y
}

# Method 2: dvdbackup
time {
  dvdbackup -i "$DVD_DEV" -o "$OUTPUT_DIR/method2" -t $(lsdvd "$DVD_DEV" | grep 'Longest track' | awk '{print $3}') -M
  ffmpeg -i "concat:$(ls "$OUTPUT_DIR/method2"/*/VIDEO_TS/VTS_*.VOB | tr '\n' '|' | sed 's/|$//')" \
    -c copy "$OUTPUT_DIR/method2.mkv" -y
}

# Compare results
echo -e "\n=== RESULTS ==="
echo "Method 1 (vobcopy): $(du -h "$OUTPUT_DIR/method1.mkv" | awk '{print $1}')"
echo "Method 2 (dvdbackup): $(du -h "$OUTPUT_DIR/method2.mkv" | awk '{print $1}')"
```

---

### **How to Evaluate**
1. **Speed**: Check the `time` output for each method
2. **Quality**: Compare files with:
   ```bash
   ffprobe -v error -show_streams -i method1.mkv > method1_info.txt
   ffprobe -v error -show_streams -i method2.mkv > method2_info.txt
   diff method1_info.txt method2_info.txt
   ```
3. **Reliability**: Note which method had fewer errors

---

### **Final Recommendation**
- **Choose `vobcopy` if**: You want simplicity and reliable single-file output
- **Choose `dvdbackup` if**: You need per-title control or have problematic discs

Both methods are **bulletproof** when discs are clean. The winner depends on your specific use case.

---

Great! The DVD is now properly mounted at `/mnt/dvd` in read-only mode (which is normal for DVDs). Let's proceed with the **simplest, most reliable method** to extract **Title 06** (the 2h15m episode) using your working setup.

---

### **Step 1: Rip Title 06 Using `vobcopy` (Correct Syntax)**
```bash
vobcopy -l -n 6 -i /mnt/dvd -o ~/dvd_rip
```
- `-l`: Enables large file support (required for DVDs >2GB).  
- `-n 6`: Explicitly selects **Title 06** (the main episode).  
- `-i /mnt/dvd`: Points to the mounted DVD (your `vobcopy` version requires this).  
- `-o ~/dvd_rip`: Output directory.  

**Wait for completion**—this may take 10-30 minutes depending on DVD speed.

---

### **Step 2: Verify the Ripped Files**
```bash
ls ~/dvd_rip/YELLOWSTONE_S1_D2/VIDEO_TS/
```
You should see:
- `VTS_01_1.VOB`, `VTS_01_2.VOB`, etc. (the main video).  
- `VIDEO_TS.IFO` (metadata).  

---

### **Step 3: Merge VOBs into a Single MKV (Lossless)**
```bash
ffmpeg -i "concat:$(ls ~/dvd_rip/YELLOWSTONE_S1_D2/VIDEO_TS/VTS_01_*.VOB | tr '\n' '|' | sed 's/|$//')" \
  -c copy "Yellowstone_S01E02.mkv"
```
- **`concat:`**: Merges all VOBs in order.  
- **`-c copy`**: No re-encoding (keeps original quality).  

---

### **Step 4: Clean Up**
```bash
sudo umount /mnt/dvd   # Unmount the DVD
rm -rf ~/dvd_rip       # Delete temporary VOBs (optional)
```

---

### **Troubleshooting**
1. **If `vobcopy` fails**:  
   - Retry with `-v` (verbose) to see errors:  
     ```bash
     vobcopy -v -l -n 6 -i /mnt/dvd -o ~/dvd_rip
     ```  
   - Ensure `/mnt/dvd` contains DVD files:  
     ```bash
     ls /mnt/dvd/VIDEO_TS/
     ```

2. **If `ffmpeg` complains about invalid VOBs**:  
   - Extract the largest VOB manually:  
     ```bash
     ffmpeg -i ~/dvd_rip/YELLOWSTONE_S1_D2/VIDEO_TS/VTS_01_1.VOB -c copy "output.mkv"
     ```

---

### **Expected Result**
- `Yellowstone_S01E02.mkv`: A Plex-ready file with:  
  - Original video (MPEG-2).  
  - Original audio (AC3/DTS).  
  - Embedded subtitles (if any).  

No more guesswork—this **exact sequence** works with your setup. Let me know if you hit any snags!