DivX to MTS Converter

Convert DivX to MTS: What This Tutorial Covers

This walks through turning an early-2000s .divx rip into an .mts file — the extension AVCHD camcorders write onto their memory cards, holding an MPEG-2 transport stream. It is a narrow target with one honest use: getting legacy footage into an AVCHD editing or disc-authoring workflow that only auto-detects .mts clips. Say the awkward part first: for phones, browsers, smart TVs and current editors this is the wrong format, and DivX to MP4 is what most people who land here actually want. What follows covers the codec pair that makes an .mts behave like real camcorder footage, the settings that matter, and the failures worth anticipating.

How to Convert DivX to MTS

1. Upload Your DivX File: Drag the .divx onto the page or click "+ Add Files" to browse. Several can be queued and converted with the same settings in one pass.
2. Check the Codec Pair: The output starts on H.264 video with AAC audio. H.264 is correct and should stay — it is the codec AVCHD is defined around. The audio is the part worth changing: switch Audio Codec to AC3 if the file has to look like camcorder output, since Dolby Digital is what the AVCHD specification names. DTS (DCA), EAC3, MP2 and MP3 are also offered, as are the DivX, Xvid, MPEG-1, MPEG-2, MPEG-4 and H.265 video codecs.
3. Set File Compression, Resolution and Trim: File Compression opens on the Quality Preset "Very High (Recommended)"; Constant Quality exposes an H.264 CRF slider from 16 to 51 sitting at 23, and Constraint Quality, Constant Bitrate, Variable Bitrate and Specific file size are there when a bitrate ceiling has to be respected. Leave Video resolution on "Keep original" unless the destination demands a fixed raster. Trim starts on Unchanged; switch it to Time Range to cut a segment out in the same pass.
4. Convert and Download: Click Convert and save the .mts. Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically a few hours later — no sign-up, no watermark, never shared or made public.

Walk-through: Making the Stream AVCHD-Faithful

DivX to MTS is always a full re-encode, never a rewrap. DivX is a brand of MPEG-4 Part 2, Advanced Simple Profile — the codec generation before H.264 — while AVCHD is defined around MPEG-4 AVC/H.264, which Sony and Panasonic introduced for camcorders in 2006. Different codecs, different generations, so the picture is decoded and compressed again from scratch. H.264 is the more efficient of the two, but efficiency is not restoration: it cannot rebuild what the original DivX encoder discarded, and a standard-definition rip stays standard-definition no matter which resolution preset you pick.

The practical goal is a stream an AVCHD tool recognises without arguing. Working through the specification:

• Leave the video codec on H.264. The AVCHD specification names MPEG-4 AVC/H.264 and nothing else. The other codecs on this page produce a valid transport stream, but an AVCHD-aware editor will not treat the result as camcorder footage.
• Switch the audio codec to AC3 when AVCHD fidelity is the point. The specification lists Dolby Digital (AC-3) at 64-640 kbps and Linear PCM at 1.5 Mbit/s for two channels — AAC, the default here, is not in that list even though it muxes into a transport stream perfectly well and plays everywhere. If you only need the file to play, AAC is fine; if an AVCHD validator is involved, use AC3.
• Stay at or below 1080p. AVCHD covers 1920x1080, 1440x1080, 1280x720, 720x480 and 720x576. The resolution list on this page goes considerably higher; anything beyond 1080p puts you outside the specification.
• Respect the bitrate ceiling. AVCHD allows a system bit rate of up to 24 Mbit/s, dropping to 18 Mbit/s when the target is DVD media. For a standard-definition DivX source there is no reason to go near either number — use Constant Quality at CRF 18-20 and let the encoder spend what the picture actually needs, or use Constraint Quality to set a hard maximum if something downstream enforces one.
• Do not upscale. Setting a 1080p preset on a 640x480 rip produces a larger, softer file and no additional detail. "Keep original" is almost always right.

AVCHD Specification vs What This Page Writes

DivX and MTS Side by Side

Common Errors and How to Fix Them

• "My AVCHD editor won't auto-detect the clip" — most often the audio codec. Switch Audio Codec to AC3, keep the video on H.264 and the resolution at 1080p or below, so the stream matches what AVCHD tools validate.
• "The picture is soft after choosing 1080p" — you upscaled a standard-definition source. Set Video resolution back to "Keep original"; adding pixels does not add detail.
• "The file is much bigger than the DivX was" — expected. DivX rips were squeezed to fit a CD-R, while the Quality Preset here aims at fidelity. Raise the Constant Quality CRF number, or set a Constant Bitrate, if size matters more than the last few percent of quality.
• "The clip plays but there is no sound" — either the source had no audio track, or its MP3 or AC-3 stream failed to decode. Confirm the original actually plays with sound before converting again.
• "Nothing on my computer will open a .mts file" — VLC and mpv play them on every desktop platform. General-purpose viewers and browsers will not, which is a property of the format rather than of the file.
• "I copied it onto an SD card and the camera doesn't see it" — see below; a bare stream is not an AVCHD volume.

When This Doesn't Work

What you download is a single transport-stream file, not a camcorder card. Real AVCHD media is a BDMV folder tree with index and clip-information files alongside the streams, and a camera or set-top player navigates that structure rather than loose files. AVCHD-aware editors and authoring tools will import your .mts and build the surrounding structure themselves, which is the normal workflow — but copying it onto a card by hand will not produce a browsable AVCHD volume. Separately, some files named .divx are DRM-protected DivX Media Format downloads rather than plain rips, and those cannot be decoded or re-encoded at all; corrupted or partially downloaded rips fail the same way. And if what you actually want is a small file that plays anywhere, MTS is the wrong target and DivX to MP4 is the conversion to run.

Frequently Asked Questions

Why would I ever convert DivX into a camcorder format?

Only for an AVCHD workflow. Some older non-linear editors and Blu-ray and AVCHD authoring tools auto-detect footage only when it arrives as an H.264 transport stream with the .mts extension, and wrapping a legacy clip that way lets you drop it onto an AVCHD timeline next to real camcorder footage. Outside that case there is no advantage: for phones, browsers, social uploads and current editors, DivX to MP4 is smaller and vastly more compatible. If you need the opposite direction, MTS to DivX does that.

What audio codec do I get by default, and should I change it?

AAC, and whether to change it depends on who is reading the file. AAC muxes into a transport stream cleanly and plays in every desktop player, so if you simply want the clip to work, leave it. The AVCHD specification, however, names Dolby Digital (AC-3) at 64-640 kbps and Linear PCM at 1.5 Mbit/s stereo — AAC is not on that list. If an AVCHD editor, authoring tool or validator has to accept the file as camcorder footage, switch Audio Codec to AC3 before converting.

What is the difference between .mts and .m2ts?

Same encoded video, different packet framing. Camcorder media use the .mts spelling and Blu-ray discs and imported footage use .m2ts, but the two are genuinely packetized differently when written: this page's .mts comes out as plain 188-byte transport-stream packets with the 0x47 sync byte at offset 0, while DivX to M2TS writes BDAV 192-byte packets that each prefix a 4-byte timestamp header, making the file slightly larger. .mts is what most AVCHD editors look for first. If a specific tool insists on .m2ts, convert to that extension rather than renaming the download — a rename changes the label, not the packets.

Will this make my old rip high definition?

No. Converting from MPEG-4 Part 2 to H.264 is a lossy-to-lossy re-encode between codec generations, and no encoder can reconstruct detail the original DivX pass discarded. A 640x480 rip carries 640x480 worth of information regardless of the resolution you select; picking 1080p stretches the frame and produces a bigger, softer file. What this conversion buys you is AVCHD compatibility, nothing more. Give the H.264 step enough bits — Constant Quality at CRF 18-20 — and it will not add loss of its own on top.

How high can the bitrate go, and what should I actually use?

AVCHD permits a system bit rate of up to 24 Mbit/s, falling to 18 Mbit/s when the destination is DVD media, and stereoscopic AVCHD goes to 28 Mbit/s. Those are ceilings for high-definition camcorder capture, not targets for a standard-definition rip. For a DivX source, Constant Quality at CRF 18-20 lets the encoder spend what the picture needs and typically lands far below the ceiling; reach for Constraint Quality or Constant Bitrate only when a downstream tool enforces a specific maximum.

Do the extra audio tracks, subtitles and chapters in a .divx file survive?

No. DivX Media Format was designed to hold multiple audio tracks, chapter points, subtitle streams and menus, and this conversion writes a single video stream and a single audio stream. Subtitles already burned into the picture stay burned in and re-encode straight through, but soft subtitle tracks are dropped. If keeping them is the point, convert to DivX to MKV, which Plex, Jellyfin, VLC and mpv all read with multiple audio and soft subtitle tracks intact.

Is it a rewrap or a full re-encode?

A full re-encode, always. The source is MPEG-4 Part 2 and the output is H.264 — two different codecs — so the picture is decoded and compressed again rather than copied across. There is no stream-copy path on this page, even when you pick DivX itself as the output codec. In practice that means conversion time scales with the length and resolution of the source, and the output is a second lossy generation whose cost you control with the File Compression settings.

My file has an .avi extension rather than .divx — will it work?

Not here. This page matches the .divx extension specifically, and most DivX video is actually named .avi, because DivX is a codec and AVI is the container it normally rides in. The .divx extension proper belongs to DivX Media Format, introduced with DivX 6 in 2005 as an extension of AVI rather than a separate container. Don't rename the file — use AVI to MTS, which reads the MPEG-4 Part 2 stream inside whether DivX or Xvid produced it.

How are my files handled, and how long are they kept?

Your DivX file is uploaded over an encrypted connection, converted on our servers, and deleted automatically a few hours afterwards — no sign-up, no watermark, never shared or made public. On a long or high-resolution source the constraint you will actually meet is upload size and time rather than the conversion itself, so trimming to the range you need first is usually faster overall.