MyMediaTools

Convert MOV to VOB — Free Online Tool

Convert MOV files to VOB format for DVD-Video compatibility, transcoding the video stream to MPEG-2 and audio to AC3 (Dolby Digital) — the codecs required by the DVD specification. This tool runs entirely in your browser using FFmpeg.wasm, so no files are uploaded to any server.

FFmpeg Command

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Estimated output:

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How It Works

MOV files typically contain H.264 or H.265 video with AAC audio, neither of which is natively supported by the DVD-Video VOB format. This conversion fully re-encodes the video stream from its source codec (e.g., libx264 or libx265) into MPEG-2, the video standard mandated by the DVD specification, and transcodes the audio into AC3 (Dolby Digital), the canonical DVD audio format. Because both the video and audio streams must be re-encoded from scratch rather than simply copied, this is a computationally intensive process. The output VOB file is formatted as a multiplexed MPEG program stream using the '-f vob' flag, making it structurally compatible with DVD authoring workflows and hardware DVD players.

What Each Flag Does

Flag What it does
ffmpeg Invokes the FFmpeg program, the open-source multimedia processing engine that performs all decoding, re-encoding, and muxing operations in this MOV-to-VOB conversion.
-i input.mov Specifies the input QuickTime MOV file. FFmpeg reads the MOV container and demuxes its video (typically H.264 or H.265) and audio (typically AAC) streams for re-encoding into DVD-compatible formats.
-c:v mpeg2video Instructs FFmpeg to re-encode the video stream as MPEG-2, the video codec mandated by the DVD-Video specification and the only video format natively supported within VOB containers.
-c:a ac3 Re-encodes the audio stream as AC3 (Dolby Digital), the standard audio format for DVD-Video. This replaces the AAC audio found in most MOV files with a codec that hardware DVD players universally support.
-q:v 4 Sets the MPEG-2 video quality using a quantization scale where 1 is best quality (largest file) and 31 is worst quality (smallest file). A value of 4 targets high-quality output appropriate for DVD playback.
-b:a 192k Sets the AC3 audio bitrate to 192 kilobits per second, a standard DVD audio bitrate that balances audio fidelity with compatibility across DVD players and authoring tools.
-f vob Forces the output container format to VOB (Video Object), which structures the multiplexed MPEG-2 video and AC3 audio as an MPEG program stream in the format expected by DVD-Video disc structures and authoring software.
output.vob The filename for the converted output file. The .vob extension signals to media players and DVD authoring tools that this file contains DVD-Video-compatible multiplexed MPEG-2 content.

Common Use Cases

  • Preparing footage shot on an iPhone or Mac (exported as MOV) for burning to a playable DVD using authoring software like DVD Styler or ImgBurn
  • Converting a professionally edited QuickTime export from Final Cut Pro into a format suitable for DVD duplication services that require VOB-structured MPEG-2 content
  • Creating DVD-compatible video objects from MOV recordings of events, ceremonies, or presentations to distribute on physical disc to recipients without reliable internet access
  • Re-encoding a MOV archive of legacy video content into MPEG-2 VOB files for long-term storage in a DVD-Video-compatible format
  • Generating a test VOB stream from a MOV source to verify MPEG-2 encode settings before committing to a full DVD authoring and burning workflow
  • Converting MOV screen recordings or tutorial videos into VOB files for inclusion in DVD training or educational packages

Frequently Asked Questions

Yes, some quality loss is unavoidable. MPEG-2 is an older, less efficient codec than the H.264 or H.265 video typically stored in MOV files, so the same visual quality requires a significantly higher bitrate. The default quality setting of '-q:v 4' produces good results for standard DVD playback, but the resulting file will not match the sharpness of the source MOV at equivalent file sizes. For the best quality, lower the '-q:v' value toward 1, though this will increase file size considerably.
The AAC audio track in your MOV file is fully re-encoded into AC3 (Dolby Digital) at 192 kbps. AC3 is the standard audio format for DVD-Video and is required for broad compatibility with hardware DVD players. The re-encoding process introduces a small degree of audio quality degradation since you are converting between two lossy formats, but at 192 kbps the result is generally transparent for most content. If your MOV has multiple audio tracks, only the first track is included in the output by default.
Most desktop media players — including VLC, MPV, and PotPlayer — can play a standalone VOB file directly without any DVD authoring step. However, a raw VOB file is not the same as a complete DVD-Video disc structure, which requires IFO and BUP menu files alongside the VOB. If your goal is a physically playable DVD or a disc image, you will need to import the VOB into DVD authoring software such as DVD Styler after conversion.
No. The VOB format does not support chapter markers in the same way MOV does — DVD chapters are defined in separate IFO files generated during DVD authoring, not within the VOB container itself. Additionally, VOB has no support for transparency (alpha channels), so any transparency data in your MOV file will be discarded. Subtitle streams from your MOV can potentially be carried over, though they must be in a DVD-compatible subtitle format (DVD bitmap subtitles) rather than text-based formats like SRT or ASS.
To adjust video quality, change the '-q:v 4' value — lower numbers (e.g., '-q:v 1' or '-q:v 2') produce higher quality at larger file sizes, while higher numbers reduce quality and file size. The scale runs from 1 (best) to 31 (worst) for MPEG-2. To change audio quality, modify '-b:a 192k' to a higher value such as '-b:a 320k' or '-b:a 384k' for better AC3 audio fidelity. DVD players typically support AC3 up to 448 kbps.
Yes, on Linux or macOS you can loop over files in a shell: 'for f in *.mov; do ffmpeg -i "$f" -c:v mpeg2video -c:a ac3 -q:v 4 -b:a 192k -f vob "${f%.mov}.vob"; done'. On Windows Command Prompt, use 'for %f in (*.mov) do ffmpeg -i "%f" -c:v mpeg2video -c:a ac3 -q:v 4 -b:a 192k -f vob "%~nf.vob"'. The browser-based tool processes one file at a time, but copying the displayed command lets you run bulk conversions locally on your desktop for large batches or files over 1GB.

Technical Notes

MPEG-2 video in a VOB container must conform to DVD-Video specifications to be usable in authoring workflows: resolution should be 720x480 (NTSC) or 720x576 (PAL), and frame rate must be 29.97 fps or 23.976 fps for NTSC, or 25 fps for PAL. The FFmpeg command as shown does not enforce these constraints, so if your source MOV has a non-standard resolution or frame rate, you may need to add '-s 720x480 -r 29.97' or equivalent flags for strict DVD authoring compatibility. The '-q:v' parameter controls MPEG-2 quantization on a 1–31 scale, which is a different quality model than the CRF scale used by libx264 in MOV output. VOB files do not support the FastStart streaming optimization that MOV files can carry, nor do they preserve MOV-specific metadata such as GPS data, color profiles beyond standard DVD gamut, or QuickTime chapter atom data. File sizes for MPEG-2 VOB output tend to be larger than H.264 MOV sources at equivalent quality due to MPEG-2's lower compression efficiency. The maximum VOB file size per segment in a DVD-Video structure is 1GB, a legacy FAT32 filesystem constraint, though as a standalone VOB file this tool is not limited to that size.

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