I have a video file that has two audio tracks. The first one is background music and the other one is commentary. I want to merge those tracks together.This is the media information I got from ffmpeg:Input #0, avi, from '24.avi':  Metadata:    encoder         : BandiAviMuxer 1.0  Duration: 00:17:49.13, start: 0.000000, bitrate: 10514 kb/s    Stream #0:0: Video: mpeg1video (MPEG / 0x4745504D), yuv420p, 1280x1024 [SAR 1:1 DAR 5:4], 104857 kb/s, 30 tbr, 30 tbn, 30 tbc    Stream #0:1: Audio: mp2 (P[0][0][0] / 0x0050), 48000 Hz, stereo, s16p, 192 kb/s    Stream #0:2: Audio: mp2 (P[0][0][0] / 0x0050), 48000 Hz, stereo, s16p, 192 kb/sI am looking for a GUI tool, because I need to be able to interactively fine tune the relative volume of the audio tracks. I may need to apply different volume ratios throughout the video. So I need some ability to edit volume as curves, with keypoints and some simple interpolations between them.I haven't done any video editing recently so I do not have a favourite application. There is a lot of video editors. I do not want to try each application in turn and see if it supports my work flow.Using a Linux only software is fine with me.
Mixing audio tracks in a video file in Linux
linux;video editing