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 […]
Before getting into learning how to use all the amazing and powerful filters, let’s learn one more useful trick; converting an entire directory. Whether it’s to convert an entire folder or apply a filter to multiple files, cycling through files is bound to come up in any workflow. In the example below, this one-liner will […]
The -map functionality is an advanced feature that allows the user to select specific input audio or video that is sent to the output. In addition, virtual streams can be created to apply complex manipulations which can be accessed with -map. Normally, a map isn’t required to set an output as the result audio and […]