VOB to M2V Converter

VOB (Video Object) is the primary container format used on DVD-Video discs, defined as part of the DVD specification developed by the DVD Forum. The format first appeared with the DVD standard finalized in September 1996 and has since been used on billions of DVD discs produced worldwide. VOB files are based on the MPEG-2 program stream format, containing multiplexed MPEG-2 video alongside audio in AC-3 (Dolby Digital), DTS, MPEG-1 Layer II, or LPCM formats. Beyond audio and video, VOB files also carry DVD subtitle streams as bitmap overlays, navigation data for menu interaction, and chapter point information. The files reside in the VIDEO_TS directory on a DVD disc, with naming conventions (VTS_01_1.VOB, etc.) reflecting the title and part structure of the content. Individual VOB files are limited to approximately 1 GB to accommodate the UDF file system requirements, with longer content spanning multiple files seamlessly. The format supports both NTSC (720x480) and PAL (720x576) video resolutions at bit rates up to 9.8 Mbps for combined audio and video. Integration of video, multi-track audio, subtitles, and navigation into a single program stream made VOB a complete solution for consumer movie delivery. While streaming and newer disc formats have supplanted DVD for new content, VOB remains hugely relevant for accessing the vast library of existing DVD content.

M2V is a file format containing MPEG-2 video elementary streams without an encapsulating container or associated audio data. Standardized as part of ISO/IEC 13818-2 (also known as ITU-T H.262) by the Moving Picture Experts Group in 1995, M2V stores raw compressed video exactly as it would appear within an MPEG-2 program or transport stream, but stripped of all multiplexing overhead. This makes M2V files primarily useful in professional authoring workflows, particularly DVD production, where video and audio streams are prepared and encoded separately before being muxed together into the final container format. M2V streams support both interlaced and progressive scan modes at resolutions ranging from standard definition up to 1920x1080 HD, with bit rates typically ranging from 2 to 15 Mbps for consumer content and up to 80 Mbps in professional applications. The use of both intra-coded frames and predictive frames provides an effective balance between compression efficiency and random access capability. Because M2V contains only video with no audio or synchronization information, it requires pairing with a separate audio file for complete playback. DVD authoring software commonly expects M2V input alongside AC3 or LPCM audio files, making this format an essential intermediate step in professional disc mastering and broadcast preparation workflows.