Free online KUX to M1V converter
Convert Youku KUX video to video-only MPEG-1 M1V for legacy playback and authoring.
Convert KUX to M1V online - free
Your file is processed instantly and deleted as soon as you download it.
Import a file from a URL
Paste a direct link to the file. We download it to our server and it is converted exactly like an upload.
How it works
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Upload your .kux file
Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .kux to .m1v conversion
After successful file upload, click to convert when you are ready.
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Download converted .m1v file
Conversion result is ready to download.
How to convert kux to m1v file
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What the KUX format is
KUX is a proprietary video format associated with Youku downloads and playback software. It is commonly created when videos are saved by Youku desktop applications or download tools. Depending on the source and software version, a KUX file may contain proprietary metadata, segmented media, or protection that prevents ordinary media applications from reading it directly.
What the M1V format is
M1V is an MPEG-1 video elementary stream. It contains video only; audio is not stored in the M1V file, so converting a KUX file to M1V discards its audio unless the audio is exported separately to a compatible stream.
M1V is useful for older MPEG-1 authoring systems, legacy hardware, and applications that require a raw MPEG-1 video stream rather than a container such as MP4. It has broad compatibility but normally produces larger files and lower quality than modern codecs at a comparable bitrate.
How to actually convert KUX to M1V
For a simple conversion without installing software, use the converter on 101convert.com: upload the KUX file, choose M1V as the output format, start the conversion, and download the result. The service is free to use; the source file must be a locally accessible, unprotected download.
For local processing, use a current FFmpeg build that recognizes the KUX input:
- Place the source file in a working folder and verify its name, for example
video.kux. - Run
ffmpeg -i video.kux -map 0:v:0 -c:v mpeg1video -f m1v video.m1v. - Open
video.m1vin the target application. Because M1V is video-only, retain the original file if its audio is still needed.
If FFmpeg reports that the input format or codec is unsupported, try the latest build and inspect the file with ffprobe video.kux. Some KUX downloads use protection or a variant that general-purpose converters cannot decode; conversion should then be performed with the authorized Youku software that can play or export that file.
Quality and compatibility limits
This is normally a lossy transcode: the KUX video is decoded and re-encoded as MPEG-1. Use a higher bitrate when preserving detail matters, for example -b:v 2500k, but confirm that the receiving device accepts that bitrate and resolution.
MPEG-1 video has limits on resolution, frame rate, and bitrate, and M1V has no container-level audio, subtitle, chapter, or metadata support. If the destination accepts a container, MP4 or MPEG-PS is usually more practical; use M1V only when the target specifically requires an MPEG-1 elementary video stream.
Note: This kux to m1v conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
KUX vs M1V: format comparison
How the KUX and M1V formats compare on the properties that matter most for this conversion.
| Property | .KUX Youku KUX video | .M1V MPEG-1 Video |
|---|---|---|
| Format type | Container | Codec |
| Compression | Lossy | Lossy |
| Maximum resolution | — | SD (up to 576p) |
| Audio tracks | One | None |
| Subtitles | Not supported | Not supported |
| Streaming | No | Partial |
| Opens in a web browser | No | No |
| Typical file size | Medium | Medium |
| Open standard | No | Yes |
| Introduced | — | 1993 |
| Developer | Youku | Moving Picture Experts Group (MPEG) |
| MIME type | — | video/mpeg |
Information about file extensions and file types is provided by File-Extensions.org
Frequently asked questions
Is the KUX to M1V converter free?
Yes, converting KUX to M1V 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 KUX file be?
You can upload KUX files up to 30 MB and convert up to 1 files at once in a single batch. With a paid plan the limit is up to 200 MB per file and 1 files at once, see our plans.
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 KUX to M1V?
No. The KUX to M1V 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 KUX file for this KUX to M1V 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.