In this section we’ll learn various useful audio filters specifically to audio but all filters will work on video as well. Since this is just an audio section, -af instead of -filter_complex unless multiple audio input sources are required. See question “How to use filters (-vf/-af vs -filter_complex)?” for more details. As you learn more […]
The last two questions covered trimming the start of an audio track and trimming the end, but what does the command look like combined? In this example, the input file is 1 minute long with the requirement of 10 seconds removed from the start and 10 seconds removed from the end of the audio. Resulting […]
Note: Trimming at this point should be easily understood but for a refresher refer to answers in How to trim ‘x’ seconds from the start of an audio track?. Trimming a couple of seconds off the end of a track is easy but again requires a different thinking of how time works in FFMPEG. Like […]
Here we’ll use an input file with a 1 minute duration with a 5 second introduction of silence. To remove that silence, it’s important to identify these two numbers because trimming requires tricky subtraction. Let’s look at the example below: -ss is used to seek to a part in the audio and -t is the […]
In this post you’ll learn how to record the screen of your Mac with terminal using FFMPEG. FFMPEG is able to use avfoundation (the audio and video library) to access webcams, audio devices and to record the screen. FFMPEG doesn’t do this automatically so finding out the correct device from the supported list must be […]
Merging audio with FFMPEG is one of the most searched questions on the internet and couldn’t be any easier. The only difference is a txt file with a list of mp3 tracks must be made before the merging can begin. Below is an example list inside the file “file.txt”: Next, using the following FFMPEG one-liner, […]
WAV is probably the most common audio format next to MP3. The WAV format has been developed and maintained by Microsoft and IBM since its initial release in 1991. wav files are known for their large file size due to its uncompressed audio but high quality format. The -ab here is audio bitrate. The higher […]
FLAC (Free Lossless Audio Codec) is another free audio codec and container that is known for it’s lossless audio quality. Oddly enough, FLAC is also maintained and developed by the xiph.org foundation. Other than FLACs inconvenience of player support, audiophiles consider FLAC to be one of the best formats for it’s Hi-Res audio. Although this […]
ogg is an open container format by the xiph.org foundation with no restrictions of software patents. ogg does have a higher quality of audio at smaller file sizes but not commonly supported on physical devices natively (MP3 players, iPhone, etc). Fortunately, ogg to mp3 is a standard and easy conversion. With audio to audio conversions […]
At times, you may have a video that you wish to extract the audio from. This is easily done by simply converting the video into an audio format. For example: A new argument -vn (no video) is used to ensure the encoded mp3 is only an audio file. FFMPEG is smart enough that this argument […]