I am a first-time ffmpeg user trying to mux h.264 .mp4 video with separate/secondary .wav audio, without re-encoding anything on the video side. Would like the final audio to come out as .aac (same codec as the audio on the h.264 file).
Essentially, I just want to layer an additional audio track (commentary) of equivalent length onto the video. I'm trying to get around Premiere's inability to import h.264 properly by editing the .wav audio separately and combining it with the original file without ever running it through Premiere or any editor. This program seems to be the best way to do it quickly.
I would be doing this in batches, so any suggestions on how to queue up multiple jobs would be appreciated. Only queuing advice I've found used Linux code.
If you have the time to answer, explain it like I'm 5, please. I am an experienced user, but totally new to this command-line-oriented way of working with content. Not sure I'm doing anything right.
Also: I'm using Windows.