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VIRTUAL DUB is an open source video processing utility for WINDOWS, designed for a fast operation. Merging an audio file with a video can be attained with ease with the help of this software. Simply open a video file, add an audio, click save and the video will be processed & saved in AVI format. The application has a very simple to understand layout. Apart from merging audio-video, this free software is capable of real-time downsizing, noise reduction, decompression of both audio & video, trimming and other interesting features.
To process videos with a different format other than AVI, all you have to do is convert the video into AVI with the help of easily available video converters. Click here for a list of free video converters.
VIRTUALDUB is designed to process AVI format videos, though it can read but not write MPEG-1 videos. It can perform basic editing on a video or a batch of videos with the help of different transition effects and also borrows 3rd party filters to be applied on them. Home Page Download Page
Kate's Video Toolkit
Kate's Video Toolkit is a free video editing software for PC. It can be used for processing videos with very basic functionality. Among the few options for editing, there is a dedicated tab to merge audio files with video. Navigate to the MIX tab, add audio and video in their respective module and click on MIX to execute the merge.
Other tools available in this software are CONVERTER, TRIM video, JOIN videos and add TRANSITION effects to the video. Like the merge/mix, other utilities are not tough to use. The interface is basic and user friendly and anyone could do the editing with ease. Home Page Download Page
Multiple files can be added to the list and the selected files can be merged to create a video in AVI/MPEG/WMV format. Also the file can be directly burnt to DVD/VCD. The advanced option lets us decide the bit-rate, frame-rate and the output size of the video. Preview the video before merging it and save it to the desired folder. The only low of this software is that the output quality is not high and not at par with expectations.
Another free video editing software, perfect for general video editing. Vidiot is capable to attach audio to video and it does it in a jiffy. Simply open a project, select the files to be merged, drag the video to the timeline and drag the audio over the video. Trim the part that is not required and render the video in desired format to a desired location. The post-process quality drop is very less and can barely be noticed. Home Page Download Page
Other operations that this movie editing software takes care of are compositing, scaling/rotating, adding transitions and titles, trimming, etc.
MediaCoder is a free video editing software which uses various audio & video codecs to transcode audio/video files to different formats. It also performs other functions like compression, audio extraction, etc. Home Page Download Page
Add a video to the program, under the audio tab, select the external file to add audio to video. The original audio can be eliminated or retained. Press the START tab on the tool box and your merged file will be ready to use.
After certain number of usage, the program may ask for a donation. You can get rid of the pop-up by entering a captcha and then dismissing or donating.
My MP4 Box GUI
My MP4 Box GUI is a freeware. It’s a Graphical User Interface for the command prompt tool MP4Box. MP4Box lets you to rapidly and effortlessly perform operations. It can be used to add audio to video. This only works for a video which doesn't have any audio muxed to it.
Add the audio & video under the MUX tab, click on MUX to execute the MUXING/Merging. The video fps can be changed as well before saving it. Other options available with this software are DEMUX, JOIN & SPLIT. Home Page Download Page