How to convert MONO audio to STEREO audio from a Gnome SimpleScreenRecorder video
2 minutos de lectura
If you use SimpleScreenRecorder (Gnome native app) you probably know that it record a video file with an audio in MONO, instead of STEREO. So i will show here how to use ffmpeg on linux to fix a recording in audio and convert it to an stereo video file.
It's very easy:
Let me explain how to use it:
- input.mp4 is the file to be converted. In my case, because it was generated by SimpleScreenRecorder, in fact it doesn't contain a mono audio track, but a STEREO track but where only one of the two channels has audio, the other channel is empty or in "silence". So, technically is stereo and it has 2 audio channels: c0 and c1
- output.mp4 is the file that you want to get in real stereo, with both channels containing the same audio copied from the original non-empty channel
- in my case, the channel c1 was the non-empty, so in the parameter -af i put this: "c0=c1" to put an exact copy of the content at c1 in the c0 channel, and also "c1=c1" because i want to keep the channel c1 just as in the original video file.
I love ffmpeg... its beatiful never end. 🤩