![]() ![]() The -vn command is similar to the -an command which removes the audio track. In the first case, let’s take a look at extracting the audio out of a media file and storing it without re-encoding it.Įxtracting the audio involves discarding the video, right? And this is easily achieved using the -vn command that removes the video. You can do this with and without re-encoding the audio. #Extract sound from video ffmpeg python how toHow to Extract Audio from Video using FFMpeg?Īnother very useful and common operation is extracting audio from video using FFmpeg. If you want to re-encode, you can use the appropriate audio/video codecs with your choice of quality settings. -c copy` copies both the tracks (audio and video) to the output without re-encoding.– map 1:a:0 selects the 0th track of the 1st input file (our audio input).-map 0:v:0 selects the 0th track of the 0th input file (our video input).What you’re doing is copying the audio and video from two different files using the map command to an output file. Here is the command line ffmpeg \ -i video.mp4 \ -i audio.mp3 \ -c copy \ -map 0:v:0 \ -map 1:a:0 \ videoWithAudio.mp4 Since you have already read about the map command in the previous section, this should be very easy. Now that you removed an audio track, you might want to add one too, right? Here’s how you add an audio track to your video using FFmpeg. ffmpeg -i videoWithAudio.mp4 -map 0 -map -0:a videoWithoutAudio.mp4 Negative map is very powerful!Īctually, in the previous section, we learned how to remove audio from your video using -an, right? You can do this using negative mapping as well as follows. By saying -map -0:a:0 you are telling FFmpeg to ignore the first audio track. If you have 5 audio tracks and you want to select all but the first one, then you can use the negative map command. ffmpeg.exe -i videoWithAudio.mp4 -map 0 -map 0:a:1 -copy videoOutput.mp4 So, basically, you are selecting everything and then de-selecting the audio. In our example, if your file has 1 video track and two audio tracks, then you can use -map 0:a:1 to only select the second audio track and copy it to your final output.Īlso, -map 0 selects everything from the first input. So, you could select the 2nd audio track of the video by saying -map 0:a:1 because the numbering starts at 0. The general syntax of the map command is -map input_file_index:stream_type_specifier:stream_index. How to Remove a Specific Audio Track using FFmpegįor removing a specific audio track using FFmpeg, you can always use the map command. How do you remove a specific audio track using FFmpeg? ![]() But, what happens if you have three or four audio tracks and you want to remove only the second audio track? Now this works great if you have only one audio track in your movie.
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