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Supports: VOB
VTS_01_1.VOB, VTS_01_2.VOB, etc.). Batch upload is supported, so you can convert every chapter file from a VIDEO_TS folder in one pass.VOB (Video Object) is the legacy MPEG program stream container DVDs use, carrying MPEG-2 video, AC-3/PCM audio, subpictures, and navigation data, with each segment hard-capped at 1 GiB for FAT32 compatibility. MTS is the file extension AVCHD camcorders write — an MPEG-2 transport stream wrapping H.264/MPEG-4 AVC video and Dolby AC-3 or linear PCM audio, jointly developed by Sony and Panasonic in 2006 for HD consumer recording. Converting from VOB to MTS re-encodes MPEG-2 into H.264 so the output drops to roughly half the size at comparable visual quality and slots straight into AVCHD workflows.
| Property | VOB | MTS |
|---|---|---|
| Container | MPEG program stream (PS) | MPEG-2 transport stream (TS) |
| Typical video codec | MPEG-2 (H.262) | H.264 / MPEG-4 AVC |
| Typical audio codec | AC-3, PCM, MPEG-1 Audio II, DTS | AC-3, linear PCM |
| Max bitrate (video) | ~9.8 Mbps (DVD-Video) | 24 Mbps (disc), 28 Mbps progressive (since 2011 amendment) |
| Max resolution | 720x480 (NTSC) / 720x576 (PAL) | 1920x1080 (1080p/1080i), 1280x720 |
| File segmentation | 1 GiB hard cap per VOB | Single continuous file |
| Origin / year | DVD-Video spec, 1996 | AVCHD spec, Sony + Panasonic, 2006 |
| Primary use today | DVD discs and legacy DVD camcorders | AVCHD camcorders, Blu-ray authoring, broadcast workflows |
| Preset | Typical CRF (H.264) | Use case | Output size vs source |
|---|---|---|---|
| Highest | ~16 | Archival masters, color-grading source | Larger than source |
| Very High (Recommended) | ~18 | General re-encoding; visually transparent | ~70-90% of source |
| High | ~22 | Edit proxies, camcorder ingest | ~40-60% of source |
| Medium | ~26 | Sharing on SD cards / cloud drives | ~25-40% of source |
| Low / Very Low | ~30+ | Preview clips, mobile playback | ~10-25% of source |
DVD VOB is standard definition (720x480 NTSC or 720x576 PAL) — it doesn't contain HD information to begin with. Converting to MTS doesn't add detail; it just changes the wrapper and re-encodes with H.264. If the output looks softer, that's the H.264 encoder smoothing low-detail MPEG-2 macroblocks. Try the Highest Quality Preset or set a higher Constant Bitrate, and keep the resolution at original 720x480 / 720x576 rather than upscaling.
H.264 is the right answer for almost every MTS use case — it's literally the AVCHD spec's required codec, so any AVCHD camcorder, Blu-ray player, or Sony/Panasonic editor will accept it. H.265 (HEVC) is smaller at the same quality but is not part of AVCHD and many camcorder editors reject it. MPEG-2 in an MTS wrapper exists for broadcast and ATSC over-the-air streams, but consumer devices expecting "MTS files" expect H.264.
Both carry the same MPEG-2 transport-stream payload, but they are framed differently, so they are not interchangeable files. MTS is the extension AVCHD camcorders use on SDHC cards, and this page writes it as a plain transport stream: 188-byte packets with the 0x47 sync byte at the very start. M2TS is the Blu-ray and post-import spelling, and our VOB to M2TS converter writes it BDAV-style in 192-byte packets that each prefix a 4-byte timestamp header, making the file slightly larger. The video and audio inside match either way. Editors that show .m2ts on ingest are relabelling for their own workflow, so if your Blu-ray authoring tool asks for .m2ts, convert to it rather than renaming the download.
Each VOB file you upload converts to a separate MTS by default. DVDs split a single movie across several 1 GiB VOBs (VTS_01_1.VOB, VTS_01_2.VOB, ...), so the result is a set of MTS chapters. If you want a single continuous file, concatenate the VOBs into one input before uploading, or use a downstream join tool — MTS's transport stream is designed for clean concatenation.
Yes. AC-3 (Dolby Digital) tracks from DVD pass cleanly into MTS since AVCHD supports AC-3 natively. PCM and MPEG-1 Audio Layer II tracks are transcoded to AAC or AC-3. Multi-channel 5.1 mixes are preserved when present; default output is stereo if the source is stereo. Subtitle subpictures from VOB are NOT carried over — MTS doesn't support DVD-style bitmap subtitles, so burn them in beforehand or extract them as a separate SRT.
Two reasons: HD resolution targets and bitrate floors. If you've selected an HD Preset Resolution (720p+) the encoder has more pixels to spend bits on than the original SD VOB needed. Drop the resolution back to Keep original (which preserves 720x480 or 720x576), or set a Specific file size target in the bitrate group — the encoder will then size to fit rather than to a quality target.
Yes. Open Advanced Options, enable Trim, set the mode to Time Range, and enter a start time after the intro and an end time before the closing credits. The trimmed segment converts in a single pass — no separate cutting step. If you only need to clip the VOB before converting (no format change), use Trim VOB directly.
Per-file uploads are capped at our standard processing limit (check the upload panel for the current value). Note that DVDs split content across multiple 1 GiB VOBs by design, so each VOB chapter usually fits comfortably. If you have a single oversized VOB, consider compressing first with Compress VOB or trim to the segment you actually need.
If you have AVCHD camcorder footage and want to author a playable DVD-Video disc, use our MTS to VOB converter. DVD-Video requires MPEG-2 video and the disc's specific VTS structure, so direct MTS playback in standard DVD players generally isn't supported without that conversion.