mp3 for listening on a portable audio device. It is possible to convert the audio of a video that you downloaded (or any audio file, for that matter) to. Run "ffmpeg -i (input/source media file) (newfile)" e.g.: " ffmpeg -i old.avi new.mp4".MP4 files can only handle lossy files.Ffmpeg by itself is a simple media converter. If you’re like me you want a version of the video with a lossless audio file. From there “move edit set up” or just ‘P’ on the keyboard to the recorded audio and trim it down to exactly match the camera audio then export Create a sync point (command-,) Then slide the externally-recorded audio to the sync point. Find a transient (a loud brief noise like a drum hit or a ‘k’ sound) and tab-to-transient it on both the camera audio and the recorded audio. If you are using Pro Tools the “tab to transients” feature is very useful here if you are syncing externally recorded audio to camera audio. The new audio file in the video will start at the exact moment that the old one did, so you’ll want to match them. I find it often easier on macOS to drag the file locations to terminal map 0:v:0 - This is a complicated option that specifies that we want to take the video from the first stream and the audio from the 2nd stream
vcodec copy - this means keep the video codec from the source file acodec copy - this means keep the audio codec from the source file Don’t want to read a whole article? The short answer is install FFMPEG and use this command: ffmpeg -i source_video.mp4 -i source_audio.wav -acodec copy -vcodec copy -map 0:v:0 -map 1:a:0 final_video.movįFMPEG is a a terminal program, so you’ll need to go to the Utillities folder inside of the applications folder and install homebrewįrom there you can enter the command like so: ffmpeg -i /path/to/movie/file.mp4 -i /path/to/audio/file.wav -acodec copy -vcodec copy -map 0:v:0 -map 1:a:0 combined_file.mov This is very useful as a way to avoid loss of quality for the video. To replace audio in a video without having to re-encode the video you can use a tool called ffmpeg.
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