WEBM to MKV - Convert video online

Conversion Results:
# Output File Source File Action

Steps:

1. Click "Choose Files" button to select multiple files on your computer or click the dropdown button to choose online file from URL, Google Drive or Dropbox. The source file can also be audio format. Video and audio file size can be up to 200M. You can use file analyzer to get source video's detailed information such as video codec, duration and bitrate etc.

2. Set target video format, bitrate, aspect, frame size and frame rate. The target video format can be MP4, AVI, FLV, MPG, MKV, WMV, M2TS, WEBM, ASF, MOV, M4V, RM, VOB, OGV or GIF.

3. Click "Convert Now!" button to start batch conversion. It will automatically retry another server if one failed, please be patient while converting. The output files will be listed in the "Conversion Results" section. Click icon to show file QR code or save file to online storage services such as Google Drive or Dropbox.

WEBM vs MKV:
Name WEBM MKV
Full name HTML5 Video Matroska Video
File extension .webm .mkv, .mk3d, .mka, .mks
MIME video/webm, audio/webm video/x-matroska, audio/x-matroska
Developed by Google www.matroska.org
Type of format Video file format Container format
Introduction WebM is a video file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video tag. It has a sister project WebP for images. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license. The Matroska Multimedia Container is an open standard free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows.
Technical details The WebM container is based on a profile of Matroska. WebM initially supported VP8 video and Vorbis audio streams. In 2013 it was updated to accommodate VP9 video and Opus audio. Matroska is similar in concept to other containers like AVI, MP4, or Advanced Systems Format (ASF), but is entirely open in specification, with implementations consisting mostly of open source software.
Associated programs VLC media player, MPlayer, K-Multimedia Player, Mozilla Firefox, Opera, Google Chrome, FFmpeg. VLC Media Player
Sample file sample.webm sample.mkv
Wikipedia WEBM on Wikipedia MKV on Wikipedia