ASF to MKV Converter

Convert ASF to MKV online, for free.



选择文件
  • 从设备
  • 来自 Dropbox
  • 来自 Google Drive
  • 从 OneDrive
  • 来自网址
最大文件大小 1GB. 升级更多 报名 了解更多

继续操作即表示您同意我们的使用条款。


Auto
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).
No change
Choose how you want to adjust your video dimensions. If you select resolution or aspect ratio, the original video's width will be used to calculate the new height according to the chosen aspect ratio.
No change
Change FPS (frames per second) of video
None
Video will be rotated clockwise.
No change
Upload
Select the best option for your subtitles: 'Upload' to add your own, or 'Copy' to replicate from the original file.
选择一个文件 浏览
Upload a .srt or .ass file.
Hard
Hardsubs, always visible and integrated into the video, are suitable for permanent captions, while softsubs, stored separately, can be turned on or off for customized viewing.
Auto
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%
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Specify the start position of trim (HH:MM:SS.MS). Leave at 00:00:00.00 to disable.
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Specify the end position of trim (HH:MM:SS.MS). Leave at 00:00:00.00 to disable.
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Enter crop rectangle's width and height in pixels (0 - 10000). Odd dimension numbers will be rounded down to the nearest even number.
Enter the x-coordinate of the crop rectangle's top left position
Enter the y-coordinate of the crop rectangle's top left position.


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/

FreeConvert.com可以将您的文件转换为以下相关格式：


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