ASF to MKV Converter

Convert ASF to MKV online, for free.



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Video Options
Choose a codec to encode or compress the video stream. To use the most common codec, select "Auto" (recommended). To convert without re-encoding video, choose "Copy" (not recommended).
Select a resolution for your video (width x height) in pixels.
Change the ratio between width and height, for example, 4:3 or 3:2
Change FPS (frames per second) of video
Video will be rotated clockwise.
Sets the mode of sizing the video. "Max" resizes the video to fit within the width and height, but will not increase the size of the image if it is smaller than width or height. "Crop" resizes the video to fill the width and height dimensions and crops any excess video data. "Scale" enforces the video width and height by scaling. "Pad" resizes the video to the width and height dimensions and keeps the aspect ratio by adding black bars if necessary.
Choose a file Browse
Upload a .srt or .ass subtitle file to be burned into your video.
Audio Options
Choose a codec to encode or compress the audio stream. To use the most common codec, select "Auto" (recommended). To convert without re-encoding audio, choose "Copy" (not recommended).
100% represents the original volume. To double the volume, increase it to 200%. To reduce volume by half, select 50%
Trim Settings
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Specify the end position of trim (HH:MM:SS). Leave at 00:00:00 to disable.



How to Convert ASF to MKV?

  1. Click the “Choose Files” button to select your ASF files.
  2. Click the “Convert to MKV” button to start the conversion.
  3. When the status change to “Done” click the “Download MKV” button

Easy to Use

Simply upload your ASF files and click the convert button. You can also batch convert ASF to MKV format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our ASF to MKV Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically delete after a few hours.


Advanced Systems Format (ASF) is a proprietary Microsoft product, which serves as a container for Windows multimedia content. Microsoft designed it for streaming and to be independent of systems and protocols. It supports chapters, captions, subtitles, metadata tags, streaming, and hardware players, but does not support menus.

 

How to open an ASF file?

It is best to use Windows Media Player to open an ASF file. Alternatively, VLC media player is a good choice too. Keep in mind that ASF can contain WMA and WMV files, which might display as the file extension of the ASF file.

 

Developed by: Microsoft

Initial release: 1995

Useful links:

https://en.wikipedia.org/wiki/Advanced_Systems_Format

https://docs.microsoft.com/en-us/windows/desktop/wmformat/overview-of-the-asf-format

Matroska (MKV) is a free, open-source, container standard that can hold an unlimited amount of audiovisual and multimedia files in a single file format. Since it is open source, a user can customize it with open-source software. The name derives from “Matryoshka” dolls, which is a famous type of Russian handicraft that consists of a set of wooden dolls of decreasing size nested one inside another.

 

How to open an MKV file?

The best way to open an MKV file is to use VLC media player. This media player is compatible with all operating systems and platforms. This is important because MKV is not an industry standard, which means that other media players might not support it.

 

Additionally, MKV does not use codecs to compress file size, which means the file can be quite large. Therefore, another option for opening an MKV file is to download the appropriate codecs that are compatible with the selected media player. To accomplish this, download the Combined Community Codec Pack (CCCP) from a trusted site, such as Ninite.

 

Developed by: Matroska

Initial release: 2002

Useful links:

https://en.wikipedia.org/wiki/Matroska

https://www.matroska.org/

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