So, neither of these solutions is actually a solution.
Consider: you record a video from a video camera that gives you a nice sharp video along with its annoyingly bad audio. Call this Video A and Audio A. You add a single .mp4 file that contains both of them, linked. At the same time you record beautiful bell-clear audio via a microphone into an audio file. Call this Audio B. You add this to your project as an mp3 file. What you want on your output is sharp video (Video A) and bell-clear audio (Audio B).
So, you
1) Drag the mp4 clip into your sequence.
2) unlink Audio A from Video A .
3) delete Audio A, leaving Video A in the sequence.
4) drag the MP3 audio clip into your sequence and align it with video A
Now if you try to export the video, Videopad 8.60 merrily exports the video only, no sound, apparently because the audio is unlinked, and the file is u recognizeable to Quicktime. (I've spent the last two days trying to debug why my video has no sound, and this appears to be it. I could be wrong.)
5) So you click "Restore Linked Audio", and it adds a second audio track containing Audio A -- the annoyingly bad audio that was originally linked to your video.
6) So instead, you try selecting Video A and Audio B. This does not recreate the link/unlink button that used to appear next to the sound icon on the audio clip, and when you export the video, you still get no sound.
Does anyone know if it's actually possible to LINK new improved imported audio with an existing video clip?
