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Ffmpeg extract audio

This article explains how to use FFmpeg to extract the audio stream from a video, either without re-encoding (keeping the original format), or converting the resulting audio file to CBR (constant bitrate) or VBR (variable bitrate) MP3 or Ogg Vorbis. To use the FFmpeg examples / commands below, you'll need to have FFmpeg installed on your system. Optionally also install libmp3lame for. To extract the audio from a video: ffmpeg -i video.mp4 -vn audio.wav As you might have guessed, the -vn option will remove the video stream from the output, leaving only the audio. In this case, I'm re-encoding the audio as WAV, as that is a very good encoding to work with in terms of further processing FFmpeg - Extract Audio from MP4 Video . FFmpeg is a command-based video editor as well as a free open-source tool. You need to input command lines to extract audio track from mp4. Apart from that, FFmpeg can record, convert, combine video, and audio files. Besides, it can also crop and trim videos FFmpeg tips: Quickly cut video clips or extract audio You can make quick work of trimming videos or capturing just the audio with FFmpeg and a Chromebook. (This is another post on using a Chromebook as a video tool for journalists

How to Extract Audio from any Video (to MP3) in Windows

FFmpeg: Extract Audio From Video In Original Format Or

  1. Here's what the different parts of the previous command do: ffmpeg - launches FFmpeg-i Bohemian_Rhapsody.flv - provides FFmpeg with the name of the input file-vn - tells FFmpeg to ignore the video track-acodec copy - copies the audio track (instead of encoding to another format) Bohemian_Rhapsody.m4a - name of the output file. After typing the previous command, only a second or so.
  2. FFmpeg is a super-powerful tool to add, remove, extract, or replace the audio in your video files. If you have a copy of FFmpeg installed on your computer, then you have just the tool to help you add or remove an audio track from your movie
  3. wav and flac files are larger than the mp4 file. ac3 conversion works with -acodec 3F2R/LFE -ac 6 but creats 4 dummy tracks, as checked in Audacity. For mp3 conversion, simply use. ffmpeg -i input.mp4 -vn -acodec mp3 -ab 320k -ar 44100 -ac 2 output.mp3. One could get more options for both input and output by trying from the list obtained from.
  4. Or with the pan audio filer: ffmpeg -i stereo.ogg -af pan=stereo|c0=c1|c1=c0 output.wav or with -map_channel: ffmpeg -i stereo.ogg -map_channel 0.0.1 -map_channel 0.0.0 output.wav Mute a channel. This example uses the pan audio filter to mute the first channel (front left) but keep the second channel (front right) as is
  5. Transcoding a WebM file (with VP8 video/Vorbis audio) to a MKV file (with H.264 video/unaltered Vorbis audio): ffmpeg -i someFile.webm -c:a copy -c:v libx264 outFile.mkv In some cases this might not be possible, because the target device/player doesn't support the codec or the target container format doesn't support the codec
  6. Using the ffmpeg video converter it is possible to extract audio from MP4 media file and convert it various audio formats such as mp3 or ogg.If you have not done so yet, first install ffmpeg: FEDORA/CENTOS # yum install ffmpeg UBUNTU/DEBIAN # apt-get install ffmpeg The following linux command will extract audio from our sample media file foo.mp4 and convert it to MP3 file named bar.mp3

The second command, will use ffmpeg to extract the audio. The-i flag, indicates the file name of the input. We used the flag -vn that will instruct ffmpeg to disable video recording. The -ab flag will set the bit rate to 128k. The -ar flag will set the audio sample rate to 441000 Hz Step 3: Click Save and extract audio from MP4 using Audacity. Way 4: How to Extract Audio from MP4 by FFmpeg. FFmpeg can be your free tool to extract audio from .mp4 video as well. If you are familiar with command lines, you can use FFmpeg to extract MP3 audio from MP4. Step 1: Free download FFmpeg from its official site FFmpeg - Extract Blu-Ray Audio. Some music audio only titles are just becoming available on Blu-Ray, and music lovers may need to extract the audio to another portable medium. Since the Blu-Ray audio is usually one big file, the file chapters need to be found and split. Most portable media requires VFAT filesystem preventing larger files sizes.

Extract Audio. ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac. vn is no video. acodec copy says use the same audio stream that's already in there. ffmpeg -i video.mp4 -f mp3 -ab 192000 -vn music.mp3. The -i option in the above command is simple: it is the path to the input file In this video, I extract an audio track from a video file using FFmpeg. Then I edit the audio in Audacity. Finally, I use map to combined the new audio wit..

Easily remove or extract the audio from a video with ffmpe

  1. Add or Extract audio from video - PHP & FFmpeg. by adnanafzal565 Posted on June 4, 2020 June 5, 2020. Adding audio to a video will replace the video's actual audio. You can use it to either replace the video's audio or wanted to put some background music on any of your video. Each video has audio input streams which we can hear when we.
  2. al in the specific folder where your video files are located. One simple way to do that is: Type (without Enter) cd (note the 'space' after 'cd') and then. Drag from Finder the folder which contains the video files into the Ter
  3. Which audio channel to extract in the case of multiple audio channels. transform. Type: Function Default: noop. Optional function to make changes to the underlying fluent-ffmpeg command. You may, for instance, change the audio bitrate or add custom audio filters. Example
  4. How to extract audio from video without re-encodin

Extract Audio. ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac . vn is no video. acodec copy says use the same audio stream that's already in there. ffmpeg -i video.mp4 -f mp3 -ab 192000 -vn music.mp3. The -i option in the above command is simple: it is the path to the input file It can also extract audio streams from video files. This can be done with or without encoding the audio stream. Even if your video file has more that one audio stream, you can select the one you want. CD ripper has freedb support. Audio Merger. Merge several audio files into one. It can copy tags and cover art from source. TAC can split cue sheets Yes, but I need to run FFMPEG to extract the audio tracks for maybe one 30 minute block per day. So I don't know if that will be a problem for others using the box. 4) Do you want someone else to be responsible for maintaining the seedbox software (operating system, applications) [managed] or do you want to do it all yourself [unmanaged] Option 3: Manually normalizing audio with ffmpeg. In ffmpeg you can use the volume filter to change the volume of a track. Make sure you download a recent version of the program.. This guide is for peak normalization, meaning that it will make the loudest part in the file sit at 0 dB instead of something lower. There is also RMS-based normalization which tries to make the average loudness the.

FFmpeg for REAPER users | The REAPER Blog

FFmpeg - Extract Audio from MP4 Video. FFmpeg is a command-based video editor as well as a free open-source tool. You need to input command lines to extract audio track from mp4. Apart from that, FFmpeg can record, convert, combine video, and audio files. Besides, it can also crop and trim videos. It is a cross-platform solution, which. You can of course select any ffmpeg parameters for audio encoding that you like, to set things like bitrate and so on. Use -acodec libmp3lame and change the extension from .ogg to .mp3 for mp3 encoding. If what you want is to really extract the audio, you can simply copy the audio track to a file using -acodec copy. Of course, the main.

2 Answers2. Stop writing the output or reading the input at position. position must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils (1) manual. -to and -t are mutually exclusive and -t has priority. This should create a copy (file-2.mkv) of file.mkv from the 20 second mark to the 40 second mark To extract the audio stream: ffmpeg -i input.mp4 -map 0:1 -c:a copy output.aac. Notice the .aac extension of the output file. FFmpeg normally tries to deduce the desired file format from the output file extension. Then, it transcodes the input into that format. So, if we just did

Wonder to Extract Audio from MP4 by FFmpeg? [Solved

  1. Audio codec used by FFmpeg in the merge. moviepy.video.io.ffmpeg_tools.ffmpeg_resize(inputfile, outputfile, size, logger='bar') [source] ¶. Resizes a file to new size and write the result in another. Parameters. inputfilestr. Path to the file to be resized. outputfilestr. Path to the output file
  2. FFMPEG Command to Extract Audio Mp3 From Mp4 Video ffmpeg -i inputvideo.mp4 outputaudio.mp3 Here inputvideo.mp4 is the input video file path that you will provide as the input and then it will output or create the audio file which is outputaudio.mp3. Here -i stands for input. It is a standard input flag used in ffmpeg commands to signify that it is the input being provided to ffmpeg
  3. imalistic web application for instant audio extraction; video to audio conversion. Using FFmpeg.wasm
  4. To extract audio from mp4 video format, here is the example command: ffmpeg -i input.mp4 -acodec copy -ss 00:00:00 -to 00:03:41 output-audio.aac. Replace the input.mp4 with video file you want to extract its audio. The output audio file is in aac format, but it's still playable audio, if you are using Windows 10, you don't need any other.
  5. I use ffmpeg to convert between audio and video formats. Two situations I use it for are: (1) when I have a video whose audio codec is of a format my media players can't handle (I use WD TV Live and it has trouble with certain formats), or (2) when I want to extract the audio only from a video.. For converting only the audio here's the command I use

FFmpeg tips: Quickly cut video clips or extract audio

Extract Audio from Video Files to WAV using FFmpeg. Posted by admin on December 15, 2009 under Tech Tips | Read the First Comment. Previously, I described how to Extract Audio from Video Files to WAV using Mplayer.Another method using FFmpeg instead of Mplayer was also pointed out in the post titled Add Stereo Audio Tracks to MKV Files, and I figured it would be useful to outline the quick one. I have this file, and would be cool use ffmpeg for extract all audio channels to separate files.. I know how to extract a single channel at time in a way like: ffmpeg -i input.mov -map 0:1 -c:a copy output.mov However this will work for the first channel only

Extracting audio from video using FFMPEG. This tutorial deals with extracting audio from video using GPU accelerated libraries supported by FFMPEG in Ubuntu 16.04. Introduction. FFmpeg is one of the most famous multimedia frameworks wich is widely used for processeing videos. In order to encode the video, certainly a video encoder must be used Mpv will play it, for ex. Think of the container as a box, what's inside the box hasn't changed (ex: opus encoded audio). m4a (mp4 audio) is a well supported container for aac audio. if required transcoding losslessly to flac audio codec can be done with ffmpeg. You probably shouldn't re-encode anything to mp3 Below is a general use of 'ffmpeg' for analizing the input (source) file for getting the audio codec information. ffmpeg -i input-file. Below is the command for extracting the audio track (you only have to change the colored text codes). ffmpeg -i input-file-acodec: copy -vn output-file. extension. Examples Let's do an example ffmpeg: Extract audio from .MKV to .MP3 12 8 May 2016 in Bash / GNU/Linux tagged audio / extract / ffmpeg / mkv / mp3 / video by Tux The following command will find all mkv files that are in the current directory and in all sub-folders and extract the audio to mp3 format FFMPEG can extract specific video and audio tracks and combine them to make the output. You can use the -map option to select specific input streams and map them to your output. The stream number starts with 0. Here, 0:v:0 is the first video stream and 0:a:1 is the second audio stream. So, the output file will be having the video from the track.

Use FFmpeg To Easily Extract Audio From FLV FIle

-acodec copy: Copy the audio source as-is, here's where all the magic is. ffmpeg will write the audio data out as various supported codecs, but specifying copy leads a bit-for-bit exact copy of the stream. Coupled with disabling video via -vn leaves you with a lone audio track inside an mp4 container. audiotrack.m4a: The output filename ffmpeg seems to have a new option -to in the documentation:-to position (input/output) Stop writing the output or reading the input at position.position must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.-to and -t are mutually exclusive and -t has priority So, you want to extract some audio from a video ey? Sure! No problem! You can do just that using ffmpeg, here's the command string.. In this example, i'll extract the whole audio track to a mp3 file, with a 320k bit (constant) rate and 44100hz audio rate (high quality mp3):. ffmpeg -i whatever.format -vn -ac 2 -ar 44100 -ab 320k -f mp3 output.mp Furthermore, the audio stream is MP3-encoded so you need to enable LAME support by passing --enable-libmp3lame to configure. The mapping is particularly useful for DVD transcoding to get the desired audio language. NOTE: To see the supported input formats, use ffmpeg -demuxers. You can extract images from a video, or create a video from many.

How to Remove Audio from Video using FFmpeg

  1. Extract audio from video file. To extract sound from a video file, and save it as Mp3 file, use the following command: $ ffmpeg -i video1.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 audio3.mp3. Explanation about the options used in above command. Source video : video.avi. Audio bitrate : 192kb/s. output format : mp3
  2. ffmpeg-python example to extract audio from mp4 Python notebook using data from multiple data sources · 7,866 views · 1y ago. 13. Copied Notebook. This notebook is an exact copy of another notebook. Do you want to view the original author's notebook? Votes on non-original work can unfairly impact user rankings
  3. To extract the audio stream: ffmpeg -i input.mp4 -map 0:1 -c:a copy output.aac. Notice the .aac extension of the output file. FFmpeg normally tries to deduce the desired file format from the output file extension. Then, it transcodes the input into that format. So, if we just did
  4. To extract the audio stream without re-encoding: ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac -vn is no video. -acodec copy says use the same audio stream that's already in there. Read the output to see what codec it is, to set the right filename extension
  5. FFmpeg is an extremely powerful and versatile command-line tool for converting audio and video files. It is free and available for Windows, Mac and Linux machines. Whether you want to join two video files, extract the audio component from a video file, convert your video into an animated GIF, FFmpeg can do it all and even more
  6. Convert a Wav File to Mp3. FFmpeg isn't only for videos, there's a lot you can do with audio files as well. This example will convert a .wav file to mp3 format.. ffmpeg -i input_sound.avi -vn -ar 44100 -ac 2 -ab 192k -f mp3 output_sound.mp
  7. ffmpeg -formats. and. ffmpeg -codecs. and all supported forms will be displayed. You can use one input file to get several different output files by just entering the name and the prefix like this: ffmpeg -i filename.mp3 newfilename.wav newfilename.ogg newfilename.mp4. This will result in converting 3 output audio files (wav,ogg,mp4) from one.

SUPER is a (FREE!!!) Windows/GUI A/V conversion program (that uses FFMPEG and MENCODER). It has options for audio only and stream copy, and if you check both of those boxes you can generally extract the audio without altering it FFMPEG extract audio from video with an annoying sound at the end. 3. Conditionally encode or copy audio stream using FFMpeg. 3. ffmpeg: Pick only AUDIO stream by metadata. 2. FFmpeg raw audio and H264 in RTSP. 0. ffmpeg - adding/re-encoding audio stream on video file. 0 Install Required Packages Although MPlayer can also be used, FFmpeg seems more refined when dumping or clipping specific audio chapters from DVD or Blu-Ray media. root #emerge --ask media-video/ffmpeg (If somebody successfully uses MPlayer/MPlayer2 to dump PCM specified chapters, feel free to add it to this Wiki page and retitle appropriately

ffmpeg - Extracting wav from mp4 while preserving the

AudioChannelManipulation - FFmpe

  1. I've been following this answer to use ffmpeg to convert and play some of my Audible audio-books in LinuxMint. Each book is a single source-file, but I've noticed that ffmpeg lists all the chapters at the start of conversion.. Is there a way to get ffmpeg to split the the book into chapters - convert each chapter into separate files (split by chapters)? )? Preferably by ffmpeg alone, but using.
  2. To extract audio from a video using FFmpeg, simply go the folding containing FFmpeg and input command as follow. Before that, you need go to desired folder using cd command, e.g. cd FFmpeg : FFmpeg.exe -i video.mp4 -vn -ar 44100 -ac 2 -ab 192k -f mp3 audio.mp3
  3. Licensing has always been an issue with encoding AAC audio as most of the encoders have had a license making FFmpeg unredistributable if compiled with support for them. The fact that there now exists a fully open and truly free AAC encoder integrated directly within the project means a lot to those who wish to use accepted and widespread standards

Encode/HighQualityAudio - FFmpe

To extract just a 1 minute portion of a video, try this: (audio) ffmpeg -i clip.mts -itsoffset 2.0 -i clip.mts -vcodec copy -acodec copy -map 1:1 -map 0:0 delay2.mts Applies itsoffset to file 1 (because it is placed just before the 2nd input), and the map for file 1 points to stream 1 (audio). I just changed the order of which map. If the images contain text, you can use ffmpeg to extract the frames to be processed by an OCR and a speech synthesis program. However you can extract audio from a video with audio file. ffmpeg -i input.mp4 -vn -c:a copy output.mp3-vn suppress the video track and Reply-c:a copy, just copies the audio track without conversion By default ffmpeg only extracts the best video and best audio stream it can find. If we want to keep all our audio streams then we have to explicitly tell ffmpeg this using the -map directive, one per stream we want to keep, in order. In this case I want to keep streams 0:1 (video), 0:3 (5.1 audio), and 0:4 (audio stereo)

Here is the command line for this using output seeking. In this example, you are instructing FFmpeg to read a video named inputVideo.mp4 and extract 5 seconds starting at the 3rd second and ending at the 8th second - while re-encoding it using libx264. ffmpeg -i inputVideo.mp4 -ss 00:03 -to 00:08 -c:v libx264 -crf 30 trim_opseek_encode.mp4 Audio. FFMpeg\Media\Audio can be transcoded too, ie: change codec, isolate audio or video. Frames can be extracted. Transcoding. You can transcode audios using the FFMpeg\Media\Audio:save method. You will pass a FFMpeg\Format\FormatInterface for that. Please note that audio kilobitrate is set on the audio format

Using ffmpeg to extract audio from MP4 media file on Linux

Fixing audio ahead of the video. In this case, we have to delay the playing of the audio. source. For that we run ffmpeg like this, 1. $ ffmpeg -i file.mkv -itsoffset 3 -i file.mkv -c:a copy -c:v copy -map 0:v:0 -map 1:a:0 out.mkv. Don't panic because of the lengthy command. It gets easy once you learn how each switch works. -i - stands for. 3. How to extract audio from MP4 with FFmpeg. Of course, except those ways we have mentioned, you can also choose FFmpeg to extract audio from MP4. It is really simple to use and fun, of course, it is a little geeky. Download FFmpeg from its official website, extract the archive, enter the resulting folder To use the FFmpeg crop video filter to crop a rectangle of 100x200 pixels from position 0,100: ffmpeg -i input.mp4 -filter:v crop=200:100:300:100 output.mp4 Related: FFmpeg: Extract Audio From Video In Original Format Or Converting It To MP3 Or Ogg Vorbis A couple of more advanced examples At least one output file must be specified. The following command will extract the AC3 audio stream to a file called audio.ac3. ffmpeg -i video.avi -acodec copy audio.ac3. Input #0, avi, from 'video.avi': Duration: 01:17:57.64, start: 0.000000, bitrate: 1587 kb/s

Video Audio 03. Once you've set the required settings, click on the Add Video button, choose the source video and wait for the conversion to complete.. Method 3: Extract audio from video using ffmpeg command line tool. Almost anything can be done on the terminal and most of the time, it requires just one command Extract the first (-map 0:1) AC-3 encoded audio stream exactly as it was multiplexed into the file: $ ffmpeg -i video.mpg -map 0:1 -acodec copy -vn video.ac3 Convert the third (-map 0:3) DTS audio stream to an AAC file with a bitrate of 192 kb/s and a sampling rate of 96000 Hz Extract Audio from a Video using FFMPEG. This will extract the audio from a video file - myvideo.mp4 and create a new 44Khz 2 channel stereo 128Kbps MP3 file. ffmpeg -i myvideo.mp4 -vn -ar 44100 -ac 2 -ab 128k -f mp3 myvideoaudio.mp3 CREATE A Video from an Image file using FFMPEG When it removed, no incorrect time in video exists. You may extract audio from the initial video file, match its duration time with the video duration, and then, you encode video and audio files together, resulting no frozen video frames play. eg. ffmpeg -i video_to_encode.MP4 -r 16 -crf 18 -vcodec libx264 -vb 10M -an video_output.av how can extract audio from a mkv file.. i've done it with ffmpeg but the output's quality was terrible.. Well, ffmpeg's default audio format for the mpeg container is an mp2 stream, and its default bitrates are always set very low, so yes, that's what you got. I just ran a test myself, and the output showed this for audio

FFmpeg is able to deal with a vast amount of audio/video formats and containters. For our task I will be using Matroska Multimedia Container container (.mkv files), as it is capable of storing different audio, video and subtitle tracks together. The video stream will be encoded with H.264 codec, currently the best guy in town The apt-get install command will work for all versions of Ubuntu except 14.04.. Audio Conversion. Converting an audio file's filetype can be performed in a single line of code using the ffmpeg utility. In this case, you only need to pass two parameters: the name of the original file and the name of the new file ffmpeg extract audio mp3, Since mp3 can't contain a video stream, to extract audio from video and covert it to mp3 it's 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 However, if you've used a tool such as tccat to obtain a .vob file of a DVD title, you can feed the .vob file to ffmpeg and extract the audio that way. This has the advantage that you can manipulate the audio (resample, compress, downmix etc.) on-the-fly using the appropriate -acodec

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ffmpeg: Extract audio from

How to Extract Audio from MP4 Quickly and Losslessly (7 Ways

FFmpeg - Extract Blu-Ray Audio - Gentoo Wik

How to Extract the Audio from a Video. You can use FFmpeg in conjunction with the Command Prompt to save video files as audio files. This way, you can strip off the video and only keep the audio part of your video file. You might want to do this to save a song from a video, extract a nice melody from a video file, and so on Now, we will extract a frame as an image for each second of this video file using our python script that uses FFMPEG tool. At the end of extraction, there will be 771 images Reviews. FFMPEG Audio Encoder. NEW VERSION 3.34.1. FFMPEG Audio Encoder can intake any media file that has audio and encode it to the codec/settings of your choice. You can open video files and or files that is only audio. You can encode with all the following codecs. Currently DTS only supports DTS to core or extract DTS-HD from files that. [FFmpeg-user] Extract Silence Data from Audio File Robert Jeffares Sun, 20 Jun 2021 00:47:08 -0700 using two features of ffmpeg I can get accurate cue points out of an audio file based on silence

using ffmpeg to extract audio from video files · GitHu

Here [OUTPUT].wav is the name of the file that youtube-dl should save the audio to and [URL] is the URL of the video whose audio youtube-dl should extract. After youtube-dl finishes downloading the audio track, convert the wav file to an MP3 using ffmpeg: $ ffmpeg -i [OUTPUT].wav -acodec mp3 -ab 256k -ac 2 [OUTPUT].mp I recently needed to extract a 30 second video clip, and remove the audio, from a 2 hour mkv video. If you are on macOS, you need to get a copy of ffmpeg, the steps are: Download the statically linked pre-compiled binary as a dmg from this page Extract audio from video files. In this demo we use custom FFmpeg settings to extract the audio track from a video file. Any video goes in, and an MP3 encoded audio file comes out. You could also use a preset like flac, depending on your exact use case. Using a filter Step we make sure to only pass videos with an audio track to the extraction Step FFmpeg includes libavcodec, Lavf - libavformat an audio/video container mux and demux library, and FFmpeg command-line program for transcoding of multimedia files, libavcodec an audio/video codec library which is commonly used by many commercial and free software products. Things Possible With FFmpeg. Read text with selected voice

audio - how to map and mute channels in stereo stream

Method 4 - Convert MP4 to MP3 using FFmpeg. The open-source FFmpeg tool can convert MP4 video files to MP3 audio file. The program uses command lines in command (cmd) window to convert video to audio format. Example 1: ffmpeg -i input-video.mp4 -vn -acodec copy output-audio.aac. In the above command line: • 'vn' means no video, extract only. The --audio-quality 0 flag tells ffmpeg to make a high quality VBR encode - with MP3 that's called V0 which has a target bitrate of around 225 kbps. This is usually transparent for quite a lot of music when encoded from lossless, and for comparison most audiobooks are around 64kpbs so it's no surprise you don't notice any sound quality issues with spoken material Now, Mac users try the following steps to extract audio from MP4 without installing software. Step 1. Open QuickTime in your Mac and load the MP4 file you want to convert. Step 2. In the Menu bar, click File, choose Export option and select the Audio Only. Name the MP3 file and select a location to save this file. Step 3 Audiotonic Pro is fully configured and integrated with the FFmpeg® codex extension library, with patent license granted by MPEG LA®. This enables you to import and export a much larger range of audio formats including M4A (AAC), AC3, AMR (narrow band) and WMA. You can also to import audio from most video files that are not DRM-protected Go to File type drop-down arrow bar and choose FFmpeg-compatible files and click your desired video to be extracted and click Open. You will see your MPEG video file has been loaded. You shouldn't be presented with the video, but with the audio from the video. Click on File > Export as Mp3 Steps Permalink. Install mkvtoolnix. Extract audio and video tracks from mkv file. Optionally convert audio track if editing needed. Merge audio and video tracks back in to mkv file. Install mkvtoolnix Permalink. mkvtoolnix is a set of command line programs for finding out information and modifying mkv (Matroska) files