Free online MTS to H263 converter
Convert AVCHD MTS video to legacy H.263 video in an AVI-compatible file.
Convert MTS to H263 online - free
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How to convert mts to h263 file
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What the MTS format is
MTS is an MPEG-2 Transport Stream file used by AVCHD camcorders, especially models from Sony and Panasonic. It commonly contains H.264/AVC video, AC-3 or LPCM audio, and metadata in a transport-stream container. You may encounter MTS clips after copying footage from a camera or from an AVCHD disc structure; desktop players such as VLC, MPC-HC, and FFmpeg can read them.
What the H.263 format is
H.263 is an older video compression codec designed for low-bitrate video conferencing and early mobile or web video. It produces smaller, lower-complexity video than modern H.264, which can help legacy decoders, but it generally provides worse image quality at the same bitrate.
H.263 is not normally saved as an .h263 file. The encoded stream is usually placed in an AVI container, sometimes in another container supported by the target device. Check the device documentation for its required container, audio codec, resolution, and H.263 variant, such as H.263 or H.263+.
How to convert MTS to H.263
Using FFmpeg
FFmpeg is the most controllable desktop option. Install a build that includes the H.263 encoder and MP3 encoding, then run:
ffmpeg -i input.mts -map 0:v:0 -map 0:a? -c:v h263 -b:v 800k -pix_fmt yuv420p -c:a libmp3lame -b:a 128k output.avi
Replace input.mts with the source filename. The command encodes the first video stream as H.263, retains the first available audio stream selection, converts audio to MP3 for broad AVI compatibility, and writes output.avi. Adjust -b:v 800k to match the receiving device; 300–800 kbit/s is typical for low-resolution legacy video.
If the H.263 encoder rejects the original dimensions, scale to a supported low-resolution frame size:
ffmpeg -i input.mts -vf scale=640:360 -map 0:v:0 -map 0:a? -c:v h263 -b:v 600k -pix_fmt yuv420p -c:a libmp3lame -b:a 96k output.avi
For interlaced camera footage, deinterlace before scaling with -vf yadif,scale=640:360. If the target accepts no audio, remove the audio mapping and codec options: ffmpeg -i input.mts -vf scale=640:360 -c:v h263 -b:v 600k -an output.avi.
Using the online converter
You can convert the file for free on 101convert.com without installing software: upload the MTS file, select H.263 as the output video format, choose the available AVI or device-compatible container if offered, start the conversion, and download the result. Large camera recordings may exceed upload limits or take longer to process.
Quality and compatibility limits
- H.263 is a lossy re-encode, so detail discarded during conversion cannot be recovered. Keep the original MTS file for archival use.
- The output may be much smaller, but reducing resolution and bitrate usually has a greater effect on size than changing the container.
- Some devices support only specific H.263 profiles, frame rates, resolutions, or bitrates. A file using standard H.263 may still fail if the device expects H.263+ or a particular AVI FourCC.
- H.263 does not provide modern compression efficiency. Use H.264 or H.265 instead when the receiving device supports them.
Note: This mts to h263 conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
MTS vs H263: format comparison
How the MTS and H263 formats compare on the properties that matter most for this conversion.
| Property | .MTS MPEG Transport Stream | .H263 H.263 video |
|---|---|---|
| Format type | Container | Codec |
| Compression | Both | Lossy |
| Maximum resolution | 8K and above | SD (up to 576p) |
| Audio tracks | Multiple | — |
| Subtitles | Embedded in the file | — |
| Streaming | Yes | Partial |
| Opens in a web browser | No | No |
| Typical file size | Medium | Small |
| Open standard | Yes | Partly open |
| Introduced | 1995 | 1996 |
| Developer | Moving Picture Experts Group (MPEG) / ISO/IEC | ITU-T |
| MIME type | video/mp2t | video/h263 |
Frequently asked questions
Is the MTS to H263 converter free?
Yes, converting MTS to H263 on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my MTS file be?
You can upload MTS files up to 2000 MB and convert up to 1 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert MTS to H263?
No. The MTS to H263 conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid MTS file for this MTS to H263 conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.