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MJPEG Tools are a set of tools that can do recording of videos and playback, simple cut-and-paste editing and the MPEG compression of audio and video. Mplex is a mpeg multiplexer. Command line tools.

Free software
OS: Win Linux
File size: 3MB
Portable version
Old versions
2 votes
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Latest version

2.1 (September 27, 2013)


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Download MJPEG Tools 2.1 Windows  3MB  Win  Portable

Download MJPEG Tools 2.1 Windows 64-bit  4MB  Win64  Portable

Download MJPEG Tools 2.1 Linux  Linux

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Download MJPEG Tools old versions

Software License

Free software / FOSS (Free download and also Free and Open Source Software)

Supported operating systems

WinWindows LinuxLinux

Complete Version history / Release notes / Changelog

File Release Notes and Changelog

Release Name: 1.9.0rc4

Notes: The 1.9.0rc4 of the mjpegtools.
Changes: mpeg2enc fixed, works now much better ;)

Release Name: 1.8.0

- changes in YUV4MPEG2 API to offer support for multiple colorspaces (particularly useful for DV video), so that multiple planar YUV formats (also monochrome or alpha) are supported.
- most filtering tools have been adapted to support multiple YUV formats, so that you will not lose quality/precision in conversion steps.
- Many new or dramatically improved filters including (but not limited to): *) yuvdenoise (denoising filter) *) yuvdeinterlace (intelligent deinterlacing program) *) y4munsharp (unsharp mask image sharpening program)
- Improvements in the IDCT/DCT routines in the MPEG-1/-2 encoder (much more exact now and not subject to overflow/truncation on the IA32 arch).
- MANY new utilties for importing/exporting data: *) New and improved PGM/PNM conversion programs for dealing with PPM data. *) Utilities to convert raw (headerless) YUV data to and from YUV4MPEG2 format. Useful when interfacing with other program suites. *) Program (yuyvtoy4m) to convert 4:2:2 data from digital cameras into YUV4MPEG2 format for use with mjpegtools. *) y4mstabilizer for stabilizing images with unsteady camera work
- Improvements and fixes in 'mplex' for handling PCM audio (LPCM audio actually works now ;))
- DPME (Dual Prime Motion Estimation) in the encoder (mpeg2enc) is fully functional (it was present but buggy/artifacted in the earlier releases)
- Rate control in the encoder improved considerably.
- Much better Quicktime file handling (via libquicktime) especially the audio tracks.
- Besides the always-excellent x86 support, we now have full support for AMD64 (including MMX/SSE/etc. optimizations) and for PPC (e.g. Linux or OS/X), and win32 support is also available (via Cygwin/Mingw).
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Guides and How to's

High-Resolution VCD/SVCD Stills on the UNIX Command Line

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Acronyms / Also Known As


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2 reviews, Showing 1 to 2 reviews

mjpegtools is a complete editing, encoding, recording, and playing set of tools, along with a few support utilities. Quite a few of these are undocumented, and even more rarely used.

They are all command line only. Except glav.

lavrec - the tool to capture with zoran based (Buzz, DC10/30) capture cards.
lavplay - plays back the captured files. Can be used for the video output on a DC30 card.

yuvdenoise, yuvmedian, yuvscaler, yuvdeinterlace, yuvfps, and many more yuv* and y4m* tools. These are the filter packages. Quite power full, excellent quality, and sadly some are quite slow.

mpeg2enc - the mpeg encoder. Does mpeg1/mpeg2. Supports profiles for vcd/svcd/dvd/and HDTV. Quality and speed range from 2-3x real time speed less than optimal quality to slow as a snail hands down the best quality mpeg2enc there is.

For noisy sources such as old hi8 videos, I've yet to come across an encoder that can retain the detail that mpeg2enc does. Other encoders (Canopus ProCoder, MainConcept) like to filter the image some way that leads to a less detailed image. Or there's CCE which does a great job at retaining detail, but has serious artifacting and mosquito noise problems when retaining this detail. HCEnc does a great job on most things.

Mpeg2enc isn't all perfect either. There's a serious rate control bug that will over shoot the max bitrate. For instance, if you pass 7500 as the max, expect your file to hit peaks near 10,000kbit/s. There is no working 2 pass encoding method. It's slow as hell. HCEnc does 40-50fps with moderate avisynth filters. mplayer + filters + yuvdenoise filters + mpeg2enc = 4-5 fps. It's 10x slower, but easily 3x the quality.

Keep in mind, mpeg2enc isn't for the blockbuster - rent and copy - type of video enthusiast. It's best at noisy captured video.

Let's not forget how important mplex is to anyone that wants to make DVDs.

There's a whole slew of other tools that are included in this package.

A sample command line to deinterlace dv footage, give a slight film look, pass it through a Spatial-Pre-Filter, Temporal-Noise-Filter, and a Spatial-Post-Filter, then encode to DVD complient mpeg2 video looks like this -

lav2yuv capture.dv | yuvdeinterlace -f | yuvdenoise -G 1,2,2 | mpeg2enc -f 8 -b 6000 -q 2 -o out.m2v.

You could of course specify/create the inter/intra matrices, dct precision, alt/zig-zig scan, adjust the luma variance, gop min/max, coefficient offsets, quantization parameters, and so on. This is not a little kids one click encoder, it's a big boy toy!!

Now if only they'd speed it up a little.

Review by disturbed1 on Mar 17, 2008 Version: 1.9.0rc3 OS: Linux Ease of use: 2/10 Functionality: 10/10 Value for money: 10/10 Overall: 6/10

This produces excellent mpeg 1 and 2 video

I gave this an overall score of 9, it would have a 10 but it has many many confusing options.

Review by ahze on Oct 11, 2004 Version: 1.6.2 OS: Other Ease of use: 5/10 Functionality: 9/10 Value for money: 10/10 Overall: 9/10

2 reviews, Showing 1 to 2 reviews

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