This will reduce the size of the new MP3, but may sacrifice some quality.įfmpeg -i video.mkv -q:a 0 -map a audio. This command creates a variable bit rate (VBR) MP3 instead of the CBR file as in the above example. ffmpeg \ -i multilingual-video.mp4 \ -map 0:a:1 \ -y output.mp3. In case there are more than one audio stream in the video file, you can specifiy what audio stream you want to extract with -map 0:a:n, where n is the audio track you want to extract. Simplified example assuming you want audio 0 in output-0.aacand audio 1 in output-1.aac: ffmpeg -i video.mp4 -map 0:a:0 -mapchapters -1 -mapmetadata -1 output-0.aac -map 0:a:1 -mapchapters -1 -mapmetadata -1 output-1.aac. Extract a particular audio track from a multi-stream video file. Convert audio track to variable bit rate MP3 (VBR) You are trying to put video into AAC, but AAC is audio only. In this command we specify the that the bit rate of the new audio file will be a constant 192kb/s (CBR). Example to extract audio stream 4: ffmpeg -i input.mkv -map 0:a:3 -c copy output.m4a -map 0:a:3 selects audio stream 4 only (ffmpeg starts counting from 0). FFmpeg will re-encode the audio track so you can also specify some additional quality options.įfmpeg -i video.mkv -b:a 192K -vn audio.mp3 Since mp3 cant contain a video stream, to extract audio from video and covert it to mp3 its enough to use (skip adding -vn): ffmpeg -i myvideo.mp4 audio.mp3 FFmpeg normally audo-detects the output format from the extension you enter for the output files, so specifying the format/codec is not needed in most cases. The -vn flags tell ffmpeg to strip the video stream from the output file. In the command above, we use the -I flag to specify the input video. ffmpeg -i BigBuckBunny.mp4 -vn -acodec copy BigBuckBunnyAudio.aac. To extract the audio from the video without re-encoding, run the command: 1. This example assumes that the video’s audio track is something other than MP3 (or whatever target format you want). From the output, we can see that the audio format is aac. This example assumes that the video’s audio track is already an MP3 so can be simply copied over without re-encoding.įfmpeg - i video.mkv -acodec copy audio.mp3 Convert audio track to MP3 (CBR): FFmpeg can easily be used to extract the audio tracks from virtually all video files and save them to new audio files: Copy audio track from video file:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
February 2023
Categories |