VOB to BMP Converter

How to Convert VOB to BMP Online

1. Upload Your VOB File: Drag and drop or click "+ Add Files" to select VOB files from your DVD's VIDEO_TS folder (e.g., VTS_01_1.VOB). Batch upload across multiple VOB chunks is supported — useful since DVD-Video splits a title across 1 GiB VOB segments.
2. Pick Quality Preset: Default is Very High. Choose Highest for archival-grade frames, Medium or Low if you only need quick reference stills. BMP is lossless regardless, so the preset mostly affects the upstream JPEG decode step from the MPEG-2 video.
3. Choose Specific Frame or Multiple Screenshots (Optional): Use Time (seconds) to grab one still at an exact timestamp, or switch to Multiple Screenshots to extract a frame every 1 second, 1/2 second, 1/3 second, etc. Pick a Preset Resolution (4320p down to 144p), enter a custom Width or Height in pixels, or scale by Resolution Percentage.
4. Convert and Download: Click "Convert". Files process server-side and download as BMP — no sign-up, no watermark, no DVD-ripping software install.

Why Convert VOB to BMP?

VOB (DVD Video Object) is the container DVD-Video discs use, standardized by the DVD Forum on a strict subset of the MPEG program stream. Each VOB holds MPEG-2 video plus AC-3, DTS, or LPCM audio, and the DVD-Video spec breaks any single title into 1 GiB VOB chunks for filesystem compatibility. BMP, by contrast, is Microsoft's device-independent bitmap from the late 1980s Windows / OS/2 era — uncompressed, lossless, with bit depths from 1 to 32 bpp. Pulling BMP stills out of a VOB is how you get archival-quality individual frames without re-encoding loss.

• Archival frame extraction — BMP stores pixels uncompressed (with optional RLE), so a frame pulled from your MPEG-2 stream loses nothing further to JPEG quantization. Useful for digitizing wedding, home-video, or legal-evidence DVDs where downstream re-compression matters.
• Legacy-software stills — older Windows imaging suites (early Photoshop versions, MS Paint, scientific image tools from the 90s–2000s) still expect BMP. Pulling a BMP straight from VOB skips a conversion hop.
• Print and publishing — set DPI to 300 (default) or 600 for press-ready stills from broadcast-resolution DVD footage; BMP keeps every pixel exactly as the MPEG-2 decoder produced it.
• DVD menu / chapter thumbnails — extract the exact frame at a chapter point (e.g., 0:42) for menu artwork, slipcover design, or chapter-list documentation.
• Forensic and evidence work — courts and labs often request lossless stills with no JPEG artifacts; BMP at the source timestamp is the standard answer.
• Icon and Windows asset creation — ICO files use the same BITMAPINFOHEADER structure, so a BMP frame is the natural intermediate for building Windows icons or cursors from DVD footage.

VOB vs BMP — Format Comparison

Quality, Resolution & Frame Selection Quick Guide

Frequently Asked Questions

Why is the BMP so much larger than the VOB frame?

VOB stores video as MPEG-2 with inter-frame prediction and DCT compression — most pixels are described as differences from neighboring frames. BMP writes every pixel literally. A standard NTSC DVD frame at 720x480 24-bit is about 1 MB uncompressed, and a 1080p upscale is roughly 6 MB. A two-hour DVD compresses around 4 GB of source video into MPEG-2; reverting to lossless BMP is why a single frame can be 1–6 MB on its own.

Can I extract every frame as a BMP sequence?

Yes. Switch from Specific Frame to Multiple Screenshots and pick a framerate — 1 second, 1/2 second, down to 1/10 second between captures. DVD-Video typically runs at 29.97 fps (NTSC) or 25 fps (PAL), so a true frame-by-frame extraction will produce ~30 BMPs per second of source. Expect hundreds of megabytes per minute of footage; plan disk space accordingly.

Does this work on CSS-encrypted DVDs?

Most commercial Hollywood DVDs use Content Scramble System (CSS) encryption, with keys stored in the disc's lead-in area. If you ripped the VOB while keeping CSS intact, the file won't decode. You need to rip with a tool that handles CSS (e.g., a libdvdcss-backed ripper) before uploading. Home-recorded and unencrypted commercial VOBs convert directly.

Which DVD timestamp should I use — chapter time or absolute file time?

Time (seconds) here means time from the start of the uploaded VOB. DVD chapters and a title's total runtime are tracked in the companion .IFO file, not the .VOB itself. If you want frame 0:42 of "chapter 5", first identify what absolute offset that maps to in the VOB chunk you uploaded (most players show this), then enter that value.

Should I pick BMP or PNG for a DVD still?

Both are lossless. BMP is older, larger, and best for Windows legacy software, ICO generation, and tools that refuse PNG. PNG compresses losslessly (typically 30–50% of BMP size) and is preferred for sharing, web, and modern editors. If you don't need BMP specifically, VOB to PNG produces smaller files with identical pixel data, or VOB to JPG for the smallest size at the cost of some compression artifacts.

My VOB is 1 GiB and ends mid-scene — is that normal?

Yes. The DVD-Video specification requires titles to be split into 1 GiB VOB segments (VTS_01_1.VOB, VTS_01_2.VOB, ...) for cross-OS compatibility. Upload the chunk containing the timestamp you want. If you're not sure which chunk holds your target moment, upload them all — the converter accepts batch input.

What bit depth will the output BMP use?

The default output is 24-bit (8 bits each for R, G, B), which exactly matches what the MPEG-2 decoder produces from the source YUV 4:2:0 frame after color conversion. BMP can store 1, 4, 8, 16, 24, or 32 bpp; 24-bit is the right choice for natural DVD content. Lower bit depths only make sense for posterized graphics or quantized indexed-color work.

Can I convert the audio out of a VOB too?

Not from this page — BMP is image-only. If you want the AC-3, DTS, or LPCM audio stream from the same VOB, use a video-to-audio converter for that. To convert the full VOB to a modern video container instead of a still, try VOB to MP4 which preserves both video and audio in an H.264 + AAC file playable on any modern device.

Will this work with VRO files from DVD recorders?

VRO (Video Recording Object) is the DVD-VR equivalent of VOB used by set-top DVD recorders. Structurally similar (MPEG-2 PS), but the file extension differs and some players treat them differently. Rename the .vro to .vob before upload, or use a VRO-aware demuxer to remux to .vob first. After that the BMP extraction works the same way.