Category Archives: Programming

Adding an additional audio source on top of the audio already in a video can be accomplished with the ​amix​ filter. This might be useful for adding background music to a commentary video. The command is as follows: A common issue that … Continue reading →

Although this next command isn’t exactly a filter, it’s still useful to know how to remove or mute, audio in an MP4. Below is the quickest way to remove audio from any form of video using the ​-an​ option: Tip:​ ​-an​ indicates no … Continue reading →

A high-pass filter is an audio filter that cuts off frequencies that are lower than the desired cutoff frequency. This is often used to cut out bass from an audio source while leaving the treble side of the audio. The … Continue reading →

A low-pass filter is an audio filter that cuts off frequencies that are higher than the desired cutoff frequency. This filter is popular in music production as it can be used to soften audio or remove undesired noise.  With FFmpeg … Continue reading →

Flitevox or Flitelib is an open source small run time speech engine. Pass it text and create an audio file with a robot saying it. Really cool and useful for some projects. Flitelib is not a native filter available in … Continue reading →

Tip: You’ll need to enable –enable-libflite for this filter to work.  Generating text to speech is a great feature to have locally on a computer. From using it in a YouTube video to making memes on Twitter, once you learn … Continue reading →

FFmpeg also has the ability to generate sounds or tones natively. With the right kind of scripting you could make chiptune like music straight from the terminal. In this example, generating a single 2000Hz sound for 10 seconds is enough … Continue reading →

Changing the pitch of an audio track means the tempo stays the same but the audio pitch increases/decreases. There isn’t a native way to change the pitch without also changing the playback speed. Luckily, chaining the atempo and asetrate filters … Continue reading →

Changing the tempo of an audio file is easy with atempo. This filter only accepts one value, a number between 0.5 and 100. In this example, the audio tempo is increased by 50%: So how does 1.50 equal 50%? That’s … Continue reading →

Adding an echo (or reflected sound) to an audio track is a great way to add more ambience or smoothness to a choppy playback. It’s a personal desired effect but for how simple it is to use, it’s a nice … Continue reading →