Convert DVD to AVI: Full Guide

To convert a DVD to AVI, you need to rip the disc’s video and audio tracks and then re-encode them into the AVI container using a computer program. The process typically takes 10–30 minutes per disc depending on your hardware and settings, and the resulting file will play on most media players and devices that support AVI.

Formula

The estimated file size is calculated by adding the video bitrate and audio bitrate, converting to bytes per second, and multiplying by the total duration in seconds.

File size (MB) = (duration in seconds) × (video bitrate in Mbps × 1000 / 8 + audio bitrate in kbps / 8) / 1000

• t – DVD length in minutes (typical movie: 90–150 min)
• s – Video bitrate in Mbps (DVD standard: 4–8 Mbps)
• a – Audio bitrate in kbps (common: 192 kbps)

The conversion time assumes a 1× read/write speed; actual time depends on your CPU, disc drive speed, and encoding settings.

Worked Example

Using the default values: t = 120 min, s = 4 Mbps, a = 192 kbps.

1. Duration in seconds: 120 × 60 = 7,200 s
2. Video bytes per second: 4 × 1000 / 8 = 500 KB/s
3. Audio bytes per second: 192 / 8 = 24 KB/s
4. Total per second: 500 + 24 = 524 KB/s
5. Total bytes: 7,200 × 524 = 3,772,800 KB
6. Convert to MB: 3,772,800 / 1000 = 3,772.8 MB ≈ 3.77 GB

The calculator shows 3,773 MB (or 3.77 GB), matching this result.

Why Convert DVD to AVI?

AVI is a widely supported container format that stores video and audio in a single file. Converting a DVD to AVI lets you watch movies on devices that don’t have a disc drive, back up your collection, or edit clips in software that prefers AVI. Unlike the original DVD’s VOB files, which are often locked by region codes or copy protection, a converted AVI is a standard file you can copy, move, or stream.

Many users choose AVI over MP4 because it’s compatible with older media players, Windows-based software, and some CCTV systems. However, AVI files tend to be larger than MP4 at the same quality because the container doesn’t support modern compression as efficiently.

What You Need to Convert

To convert a DVD to AVI, you need three things:

• A DVD drive (internal or external USB) that can read the disc
• Ripping software that can bypass CSS encryption (the protection on commercial DVDs)
• Encoding software that outputs AVI (often built into the ripper)

Free programs like HandBrake, VLC, and MakeMKV are commonly used. HandBrake is popular because it handles both ripping and encoding in one step, and it offers presets for AVI. VLC can also convert, but it’s slower and gives less control. MakeMKV creates MKV files, which you’d then convert to AVI with another tool.

For commercial DVDs, you need to handle the Content Scramble System (CSS). In many regions, ripping a DVD you own for personal backup is legally gray, but the tools themselves are widely available. Always check your local copyright laws.

Step-by-Step Conversion Process

Here’s a general workflow that works with most software:

1. Insert the DVD into your computer’s disc drive.
2. Open your ripping program (e.g., HandBrake).
3. Select the DVD as the source. The software will scan the disc and show the main title (usually the longest one).
4. Choose the AVI container from the output format options. If AVI isn’t listed, choose MP4 and then convert again, or use a tool like FFmpeg.
5. Pick a video codec. For AVI, the most common is MPEG-4 (Xvid or DivX) or H.264. H.264 gives better quality at smaller sizes but may not play on very old devices.
6. Set the quality or bitrate. A bitrate of 4–5 Mbps for 480p DVD content is a good balance. Higher bitrate means better quality but larger files.
7. Choose the audio track and codec. MP3 or AAC at 192 kbps is typical.
8. Start the conversion. It may take 10–30 minutes for a full movie.
9. Once done, test the AVI file in your preferred player.

If your software doesn’t support AVI directly, you can rip to an intermediate format (like MKV) and then use FFmpeg to convert: ffmpeg -i input.mkv -c:v libxvid -c:a libmp3lame output.avi.

Common Problems and How to Avoid Them

Several issues can arise during conversion:

• Copy protection errors: If the program can’t read the disc, you may need to install libdvdcss (for HandBrake on Windows) or use a tool like AnyDVD (commercial).
• Audio out of sync: This often happens when the source has multiple audio tracks. Select the correct track explicitly, or adjust the audio delay in the settings.
• File too large: AVI with high bitrate can exceed 4 GB, which some file systems (FAT32) can’t handle. Use NTFS or exFAT, or lower the bitrate.
• No sound in AVI: Some players don’t support AC3 audio in AVI. Convert audio to MP3 or AAC.
• Region code issues: If the DVD is from another region, your drive may refuse to play it. Some drives are region-free, or you can change the region code a limited number of times.

Always check the final file’s duration and play it a few minutes in to catch sync or quality issues early.

Comparing AVI with Other Formats

AVI is an older container (introduced by Microsoft in 1992) that has some limitations:

• File size: AVI is less efficient than MP4 or MKV, so files are larger for the same quality.
• Compatibility: AVI plays on Windows, many TVs, and older devices, but not on iPhones or some modern Android players without third-party apps.
• Subtitles: AVI doesn’t support embedded subtitle tracks well; you often need a separate .srt file.
• Modern features: AVI can’t hold chapter markers, multiple audio tracks, or menu structures like MKV can.

If you only need to watch on a computer, AVI is fine. For streaming to a smart TV or phone, MP4 (H.264) is usually better. For archival with all extras, MKV is superior.

Cost and Legal Considerations

Most DVD ripping software is free and open-source (HandBrake, VLC, MakeMKV). Some paid tools offer faster encoding or a simpler interface, but they aren’t necessary for basic conversion.

Legally, ripping a DVD you own for personal backup is permitted in some countries (like the US under fair use, though the DMCA has exceptions) and prohibited in others. Distributing the converted file is almost always illegal. The tools themselves are legal to use, but the intent matters. Check your local laws before ripping.

Frequently Asked Questions

Does converting a DVD to AVI lose quality?

Yes, some quality loss is inevitable because AVI uses lossy compression. However, with a high enough bitrate (4–6 Mbps for 480p), the loss is barely noticeable. If you want lossless, you’d need to keep the original VOB files, which defeats the purpose of converting.

How long does it take to convert a DVD?

It depends on your CPU speed and the encoding settings. A typical 2-hour movie takes 15–30 minutes with HandBrake’s default settings. Real-time encoding (1× speed) would take 2 hours, but modern CPUs are faster.

Can I convert a DVD to AVI without a DVD drive?

No, you need a drive to read the disc. If your computer lacks one, you can use an external USB DVD drive or extract the VOB files from a disc image (ISO) that you’ve already created.

Why is my AVI file so large?

AVI doesn’t compress as efficiently as MP4. Also, if you used a high bitrate or didn’t re-encode (just copied the streams), the file can be several gigabytes. Lower the bitrate or choose a more modern codec to reduce size.

Can I convert a DVD to AVI on a Mac?

Yes, HandBrake runs on macOS and supports AVI output. VLC also works. The process is the same as on Windows.

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in t | DVD length | min | 120 | 1 | 600
in s | Video bitrate | Mbps | 4 | 0.5 | 20
in a | Audio bitrate | kbps | 192 | 64 | 640
out size | Estimated file size | MB | (t * 60 * (s * 1000 / 8 + a / 8)) / 1000 | 0
out time | Estimated conversion time (1x) | min | t | time