MTS to DivX Converter

MTS to DivX Converter

DivX is the codec that made "a movie fits on a CD" true in the early 2000s, and it still turns up as a hard requirement on DVD players, older set-top boxes and DivX-certified hardware that will not touch a modern file. This page takes AVCHD camcorder footage — the .MTS clips a Sony, Panasonic or Canon handycam writes — and re-encodes it into that DivX world.

Two things are worth knowing before you start, because both surprise people: the file you get back is named .divx but is an AVI file inside, and the quality slider on this page is not the CRF slider its label suggests. Both are covered in detail below.

AVCHD (.MTS) Source Format at a Glance

DivX Output at a Glance

That rename point matters more than it sounds. The bytes we produce are a standard AVI stream; the .divx extension is a label. Devices that advertise DivX support usually accept both, but anything expecting a normal video file will be much happier once the extension reads .avi. Nothing about the file changes when you rename it.

How to Convert MTS to DivX

1. Upload Your MTS File: Drag your .MTS clip onto the page or click "Add Files". This page accepts .mts; queue as many camcorder clips as you like and they convert with identical settings.
2. Pick an Audio Codec: Video Codec is fixed to DivX here, so audio is the codec choice you actually make. MP3 is preselected and is what old DivX hardware decodes most reliably; choose AC3 instead if your camcorder recorded a surround mix worth keeping.
3. Set File Compression and Video resolution: Choose Constraint Quality and enter a low number (lower is better on this page), or use Specific file size to hit a target. Video resolution opens on "Keep original"; you can downscale here if the target device cannot handle 1080.
4. Convert and Download: Click Convert, save the file, and rename it to .avi if your player is fussy. Files upload over an encrypted connection, convert on our servers, and are deleted automatically after a few hours — no sign-up, no watermark.

The Quality Field Is qscale, Not CRF

MPEG-4 Part 2 encoders have no CRF mode. The field on this page is labelled "CRF" anyway, but what it actually feeds the encoder is -q:v on a 1 to 31 scale where lower is better. This is the opposite mental model from the 0–51 x264 scale most people carry around, and the number the control opens on is not dependable, because two internal configuration contexts both lay claim to it. Set it explicitly every time.

The size consequence is large. Measured on a 10-second 720p clip through this pipeline, -q:v 2 produced 23.5 MB while -q:v 23 produced 2.28 MB — same source, same codec, one field. Aim for 2–5 for a clean-looking result, 6–10 for a balance, and use Constraint Quality rather than Constant Quality when you want a hard ceiling on bitrate as well.

The Quality Preset dropdown is a different control and it does work here, but on a video source it multiplies your camcorder's own recorded bitrate rather than setting an absolute target. The multiplier runs from 0.30x at "Lowest" to 1.50x at "Highest", and the default "Very High" sits at 1.32x — above the source. "Medium" at 0.90x is the first preset that actually produces a smaller file.

Frequently Asked Questions

Why does my downloaded file have a .divx extension instead of .avi?

Because you asked for DivX output, and the page names the file after the format you chose. Inside, it is an AVI file — the same RIFF structure any AVI uses, holding MPEG-4 Part 2 video. DivX-certified hardware generally accepts the .divx name directly; everything else is happier if you rename it to .avi, which changes nothing about the content.

What is the difference between DivX and Xvid here?

Very little in practice. Both are implementations of MPEG-4 Part 2 Advanced Simple Profile, and a player that decodes one almost always decodes the other. This page pins the video codec to DivX; if you specifically need the Xvid label, convert MTS to Xvid instead. Playback compatibility comes from the underlying MPEG-4 Part 2 standard, not the brand name.

What number should I type into the "CRF" box?

Between 2 and 10, treating lower as better quality. Despite the label, this control sets qscale on a 1–31 scale, not an x264-style CRF. Entering 23 because that is the usual x264 default will give you a heavily degraded picture — on this scale 23 is near the bottom of the range.

Will converting to DivX fix the interlacing lines in my camcorder footage?

No. Consumer AVCHD camcorders usually record 1080i, and there is no deinterlacing anywhere in this conversion, so the comb lines on moving subjects are carried straight into the output frames. Converting to a different container or codec does not address it. You need a deinterlace filter in an editor or player.

Does DivX support 1080p HD from my camcorder?

Yes, the codec handles 1080 fine, but the hardware you are targeting may not. Many DivX-certified DVD players from the format's heyday cap out at standard definition or 720p profiles. If a device rejects the file, downscale using Video resolution before blaming the codec. Note the resolution presets set height only, with width following the source aspect ratio.

Why is my DivX file larger than the original MTS?

Two likely causes. Either the Quality Preset is on its default of "Very High", which targets 1.32 times the source bitrate, or you set a very low qscale number such as 1 or 2, which requests near-maximum quality. MPEG-4 Part 2 is also a much older codec than the H.264 in your source, so it needs more bits to reach the same visual quality.

My 1440×1080 AVCHD clip looks stretched — what happened?

Some AVCHD recording modes store 1440×1080 with non-square pixels that are meant to display as 16:9. Any resize in this conversion normalises pixels to square without compensating for that, so the intended geometry is lost. Set Video resolution to Width x Height and enter 1920 x 1080 explicitly to bake the correct shape into the output.

Can I convert only part of a long camcorder recording?

Yes — the Trim control lets you set a start time and duration so only that section is encoded. For longer or more precise work, or to cut a clip before converting it at all, the video cutter accepts .mts files directly and saves you re-encoding footage you are going to throw away.

Should I really be converting to DivX in 2026?

Only if something specific demands it — a DivX-certified player, an old car head unit, a legacy editing suite. For anything modern, convert MTS to MP4: it is smaller at the same quality, plays on phones and browsers, and is not a two-decade-old codec. Choose DivX when the destination hardware, not your preference, is what is driving the decision.

How are my uploaded camcorder files handled?

Your .MTS file is uploaded over an encrypted connection and converted on our servers. Uploaded files and their results are deleted automatically after a few hours, are never shared or made public, and there is no sign-up and no watermark on the output.