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WebM for Lazys

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A wrapper around ffmpeg and AviSynth made for converting videos to WebM without having to use the command line, fork of this project.

Important to know:

About WebM

WebM is an open, royalty-free, media file format designed for the web. WebM defines the file container structure, video and audio formats. WebM files consist of video streams compressed with the VP8 or VP9 video codecs and audio streams compressed with the Vorbis or Opus audio codecs. The WebM file structure is based on the Matroska container.

For more information about WebM, see the FAQ.

Benefits of WebM

WebM for Lazys features


Get the last update with just one click.


What can i do?

You can get and edit your video easly with the next options.


Paste the url of the video you want and press enter, the download will start. You will get the best quality.


Disable option in general tab to select manually the format do you want.



Trim precisely the length, with a simple interface. You can do multiple trims if you need. Go to.. the exact frame or time you want to start the trim, also save the current frame to source path.



Crop what is just important for you, you can see in real time the new resolution also you can set the exact size that you want or set an aspect ratio like 16:9, 9:16 and more under Set dimensions. Just move the edges with the mouse or use the keyboard.


Dynamic Crop

Follow an object on the canvas easly. Steps for a correct workflow:

  1. Use trim to define the clip lenght (optional)

  2. Open Crop filter and define the crop size, use New resolution as guide. Even numbers are required. You can use Set dimensions for exact values new resolution set dimensions
  3. Select click Dynamic Crop. When it is actived will be green which means that each movement will be registered dynamicCrop
  4. Set stabilitation level on Advanced>Processing to get a smooth effect


For this example the edition requires 30 seconds.

Final result

Right side was processed with dynamic crop.

Dynamic Speed

Add specific speed to just a section of video:

  1. Use trim to define the clip lenght

  2. Dynamic filter will be enable
  3. Add points in the frame you want with the desire rate (a final ¯\ _ /¯ shape is recomended)
  4. There is not limit for points


Final result

A specific section is slowdown.



Make grid videos to compare or shared different views. You can choose between horizontal or vertical. It requires that both videos share codecs, dimensions, length. Output file is in same path as video #1. Above you can find an example.



If your video looks dark, you can try with some pre-set filters. Now you can create your own filter using Advanced option, change gamma, contrast and saturation.



Add text, change font, size, position, also set when it start and end.



Rotate your video to any direction with just one click.



Loop function, forward and reverse making an infinite effect.


Use different levels of stabilization for your clip. Left side original, right side processed. Find it in Advanced>Processing.

Merge and Convert

Drag and drop two or more video files inside the application, select what do you want to do. Search for the result in source path.


There is More that you can do

Shortcut keys



If you have any issues with this program, you may report them on here. Add the respective video to test and configuration used.


Version 3.30.1

Version 3.30.0

Version 3.29.0

Version 3.28.8

Version 3.28.7

Version 3.28.6

Version 3.28.5

Version 3.28.4

Version 3.28.3

Version 3.28.2

Version 3.28.1

Version 3.28.0

Version 3.27.0

To see more changelog.


This software is released under the MIT license.