How to Join ASF Video Clips into a Single File

December 18, 2020Ashley Mae

"I have many .asf files and I want to join them in one single .asf file or .avi file, without loss of quality. Any suggestions for software? Thanks a lot."

If you are one of those who want to combine ASF files into one file, then you are coming to the right place.

To play several ASF clips seamlessly without interruption, the best way is to join them into one file.

Here is the ideal: Merge ASF videos with videos or audio with 2 video joiner software online and on PC/Mac.

Join ASF Videos

Part 1. How to Free Merge ASF Videos Online

It draws a hard line on combining several ASF videos without any tools. However, things get easier when you find the best ASF video joiner software.

Video Merger Online is a free online application to join over 2 ASF files into a single one without a watermark. After combining the ASF files, it can convert ASF to more popular MP4, AVI, MOV, and other formats, instead of the less popular ASF format.

Let's breakdown the exact process.

Step 1. Upload ASF videos online
Open the ASF file joiner freeware online. Click the Add Files to Merge button.
Then a pop-up prompts and just download and install the merger launcher, which can combine ASF files and download the merged single file automatically.
After the successful installation, a browser window will appear, and just add the ASF videos you want to merge into one.
Add File
Step 2. Join ASF videos into one file
Once the ASF files are uploaded successfully online, you are allowed to drag and drop the video file to arrange the order as you wish.
Select the resolution (high up to 1080p HD) and output format (MP4, AVI, MOV, MKV, M4V, FLV, WMV, VOB, and MPG) from the drop-down options.
Finally, click Merge Now to navigate the location where you want to store the merged video file and it will start combining and downloading the merged file.
Merge Now

This free ASF video merger software is no file size or number limit, and you can join multiple ASF videos as you expect.

Part 2. How to Join ASF with Video/Audio on PC/Mac

To add audio into an ASF video file and merge them, you are recommended to use Aiseesoft Video Converter Ultimate. It is a professional video merger tool that can add audio and video into the ASF file on Windows and Mac computers. Compared with the free online video joiner in part 1, this tool gives you more controls to refine your ASF files while merging them.

Let's dive right into the detailed steps.

Step 1. Add ASF files
Free download this ASF video joiner on PC or Mac. Follow the on-screen instructions to install and launch it.
Free DownloadFor Windows

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Free DownloadFor macOS

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Initiate the window, click the big plus icon in the middle to add the ASF videos.

Alternatively, you can navigate those ASF files and drag and drop them into this software directly.

Add Files
Step 2. Merge ASF videos with video or audio
Here, you are given 2 ways to combine the ASF files.

Merge ASF videos with videos

On the main screen, you should arrange the ASF videos' order by clicking the arrow-down or arrow-up icon.

Alternatively, you can drag the ASF video file into the order and drop it directly.

Next, select the checkbox of Merge into one file at the bottom.


Join ASF videos with audio

To add multiple background audio files into the ASF file, you should

1. Click and select the ASF file.

2. Click the Edit icon (the star image).

3. Navigate the Audio tab.

4. Click the Add icon to add one or more audio files.

It also lets you adjust the audio volume and set the delay time to put the audio files.

Finally, click OK to apply the changes.

Step 3. Export ASF file
When all the settings are made well, you will export the merged video file.
Click the dropdown list of the Down icon at the right side and, select ASF or other formats from the left pane in the pop-up screen.
To merge ASF video without losing quality, you should select Same as source.
Select ASF

In this way, you can merge ASF files without or with re-encoding.

Finally, find a location to store the merged video file, and click Convert All to begin combing ASF videos immediately.

Convert All

Apart from working as an ASF video joiner, you cannot miss its powerful features as below:

Give this ultimate video solution a free try.

Free DownloadFor Windows

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Free DownloadFor macOS

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Part 3. FAQs of Joining ASF Files

What is an ASF file?

ASF (Advanced System Format) is Microsoft's proprietary digital audio/digital video container format. Similar to QuickTime, AVI, or OGG container formats, ASF specifies the structure of the video/audio system, instead of how the video/audio should be encoded. It is a format optimized for streaming. Learn more about ASF here.

Can VLC merge video files?

Yes. VLC is a professional media player. It can also merge videos by putting those files in order and convert to the format you would like.

Do I lose quality if I merge two ASF videos?

The quality loss depends on the compression and encoder. If you merge 2 ASF files in HD resolution and high frame rate/bitrate, etc., into a video file in SD resolution and lower frame rate/bitrate, etc., the quality will be lost. Otherwise, you can get a higher or the same as video file as the original ASF files.


To watch multiple ASF video clips without interruption, merging them is a good solution. This page shares 2 ways to join the ASF files. You can merge all ASF videos into one single file online with the freeware, and put all ASF videos and audio into one file with Aiseesoft Video Converter Ultimate. No matter which method you select, it does well.
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