Hot answers tagged mixing
You can use tsMuxer to simply switch out the audio in the MTS without re-encoding the video or audio. MTS is just a container format, it's the "housing" for the video and audio streams. Though your audio has to have the exact same length to be in sync with the video and the audio format has to be supported by the M(2)TS file format.
Premiere Pro has a number of default transitions under the "video transitions" tab in the effects pane (usually located in the bottom left of the window). Are those what you are looking for? If you have experience with After Effects, you could also use AE's more robust effects library to animate interesting effects for your videos. Based on your included ...
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