compress video

01 How to get the audio out of a video Save the sound from an MP4, MOV, MKV or WebM as its own file. Check what the audio already is, copy it out untouched in under a second, and re-encode only when you need MP3 or WAV. Guide 02 How to compress a video Make a video small enough to send without making it look bad. What CRF does, which setting to change first, and the one ffmpeg command that does most of the work. Guide 03 How to trim, crop or change the speed of a video Cut a clip to length, crop it square or vertical, or play it at double speed. The ffmpeg commands for each, why a fast trim can start in the wrong place, and when the browser editor is the easier route. Guide 04 How to convert audio and video formats Convert between MP4, MOV, MKV, WebM, MP3, WAV and FLAC. Skip the re-encode when you can, and know when you can't. Guide 05 How to open a RAW, PSD or HEIC file you were sent A Mac opens all three with nothing installed. Windows needs extensions, one of them paid, and Linux one package. The commands, what each one gets wrong, and a viewer for any device. Guide 06 How to measure loudness to a broadcast target Read integrated loudness, loudness range and true peak the way EBU R128 and ATSC A/85 define them, with one FFmpeg command or in the browser, then bring a file to −23 LUFS and check that it landed. Guide 07 Manifesto Why our tools do their work on your device, why a few features use our server, and the rules that server follows: encrypted first, a key we never get, and nothing kept longer than the job. Article