There is yet another common use of FFMPEG, i.e. adding a new audio track to an existing file which can be a video-only file or a video file already with an audio track. A use case will be adding a…

Due to various reasons, the audio and video tracks sometimes may become out-of-sync in a video clip, i.e. there are some delay between the tracks affecting the overall viewing experience. Use the following as examples to fix the issue. CASE…

Very often videos shot by smart phones do not carry a proper orientation indicator as intended due to various reasons. In order to rotate these videos without re-encoding, try the following command. ffmpeg -i input.mp4 -c copy -metadata:s:v:0 rotate=90 output.mp4

Many video file formats allow you to have multiple sound tracks (e.g. karaoke videos) where the first audio track is treated as the default by many audio-visual editing applications. Many of those can only handle one audio track which is…

I needed for a reliable, fast and non-destructive way to increase gain on a video’s audio track. I found it in using the ffmpeg tool, which is a swiss army knife for dealing with video and audio files. It’s conveniently…