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 […]
This is one of the most asked questions on google about FFMPEG and for a good reason, by default automatic compression is added depending on the filter. This is usually done to perform the filter quicker as the higher the quality, the longer the command completion time. Compression can be avoided using recommended codecs and […]
As you use FFMPEG one command might get the job done but at times applying multiple filters to a video is needed. It is possible to apply one filter at a time constantly referencing the last output file but ideally, chains are used to efficiently apply multiple filters. There are two types of filter chaining […]