VOB Won't Open? Convert to MKV Instantly
Fast, instant VOB to MKV conversion. No signup required. Just drop your .vob file and get .mkv in seconds.
Batch Settings
Generation loss — quality may degrade
VOB uses lossy compression, and so does MKV. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Some metadata may not survive
Your VOB file may contain DVD IFO data metadata. MKV has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
What compression artifacts to expect
MKV lossy compression can produce codec-dependent. At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
还在为VOB文件播放不便、体积过大而烦恼吗？DVD光盘里的珍贵影像，或是老电影收藏，VOB格式虽然经典，但在手机、平板上分享或观看就显得力不从心了。MKV（Matroska）作为一种先进的容器格式，能将高质量视频、多音轨、多字幕完美封装，同时保持较小的文件体积，是当下主流的视频存储和传输选择。将VOB转换为MKV，不仅能让您的老资源焕发新生，更便于在各种设备上流畅播放、便捷分享。无论是家庭聚会录像，还是经典影视剧集，转换后都能轻松融入您的数字生活。我们的工具操作简单，转换速度快，旨在为您提供无缝、高效的VOB转MKV体验，让您的影音资料管理更上一层楼。
- 微信分享家庭录像
- Switch游戏机视频导入
- 备份老式DVD收藏
考虑到大陆及东南亚地区用户对存储空间和网络传输效率的重视，MKV格式因其优秀的高清压缩比，在移动设备和社交媒体分享场景中尤其受到青睐，远比VOB更具实用性。
About VOB to MKV Conversion
Dealing with a VOB file that won't open on your device? You're not alone — VOB compatibility issues are one of the most common reasons people search for a file converter. VOB is the DVD video format containing MPEG-2 streams, audio, subtitles, and menus.
The fix is simple: convert your VOB to MKV. MKV (Matroska) is an open container supporting virtually any codec, multiple audio tracks, and subtitles. This conversion lets you improve file compatibility across devices, solving the problem in seconds rather than hours of troubleshooting.
Full Name: VOB uses DVD Video Object, while MKV uses Matroska Video. Compression: VOB uses Lossy, while MKV uses Lossy. Color Depth: VOB uses 8-bit, while MKV uses 8–10 bits (codec dependent). VOB uses lossy compression, and so does MKV. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
CocoConvert processes your VOB file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you Your VOB file won't open on a recipient's device or in an application, or when you A website, service, or platform only accepts MKV uploads. Common misconception: ""I'll convert to MKV and then back to VOB — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going vob → mkv → vob will produce a noticeably worse file than the original. always keep your source file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert VOB to MKV
- 1
Add your VOB file
Drag and drop your .vob file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick MKV output
Select .mkv as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The video engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .mkv file. For batch jobs, download all at once as a zip.
What Happens When You Convert VOB to MKV
Your VOB video is transcoded — video and audio streams are decoded and re-encoded into the MKV container. This is a lossy process that takes time proportional to the video duration.
Your VOB file is demuxed — video, audio, and subtitle streams are separated
The video stream is decoded frame-by-frame, then re-encoded with MKV-compatible codecs (typically H.264 for MP4)
The audio stream is decoded and re-encoded (or copied if the codec is compatible)
Subtitle and chapter data is preserved where the target supports it
Streams are muxed into the MKV container and the file is saved
VOB vs MKV — Detailed Comparison
| Feature | .VOB | .MKV |
|---|---|---|
| Full Name | DVD Video Object | Matroska Video |
| Compression | Lossy | Lossy |
| Color Depth | 8-bit | 8–10 bits (codec dependent) |
| HDR Support | No | Yes |
| Typical File Size | 200–400 MB per minute (DVD quality) | 50–200 MB per minute |
| Platform Support | Limited | Very Wide |
| Browser Support | none | Limited |
| Year Created | 1996 | 2002 |
| Open Standard | No | Yes |
Should You Convert VOB to MKV?
When to Convert
- ✓Your VOB file won't open on a recipient's device or in an application
- ✓A website, service, or platform only accepts MKV uploads
When NOT to Convert
- ✗You're converting just because the file "seems old" — re-encoding lossy-to-lossy always degrades quality
Common Mistakes When Converting VOB to MKV
"I'll convert to MKV and then back to VOB — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going VOB → MKV → VOB will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Why won't my VOB file open?
VOB files may not open if your device lacks the right codec or application. Converting to MKV — a more widely supported format — usually resolves this. MKV (Matroska) is an open container supporting virtually any codec, multiple audio tracks, and subtitles.
Is it safe to convert VOB to MKV online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting VOB to MKV?
VOB uses lossy compression, and so does MKV. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my VOB file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert VOB to MKV on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.