One of the most comprehensive programs for these operations is Apowersoft Video Converter Studio. It can convert between practically all video formats, including AVI, MP4, FLV, and MKV, and is even capable of 720P and 1080P HD video conversion. You may also convert audio files, including MP3, MP2, OGG, and AAC, among others.

If that wasn't enough, you can customize your video output and quality depending on the destination: smartphone (Android or Apple), console (such as PSP or PS3), or YouTube.

You can use the editor included with this video converter to add or import external subtitles and audio files to your original video files. You can also use contrast, brilliance, and saturation effects to alter the video image or mix many audiovisual tracks into one.

You can simply drag and drop your media files onto the primary user interface, select an output format, and click a button to begin converting, but there's a lot more you can do along the way. A separate window can be used to edit each video. You can edit them by trimming, cutting, and cropping them, as well as adding a watermark and adjusting their brightness, contrast, and saturation.