how to extract audio from a video using audacity ffmpeg

Does anyone know how to solve it? Help me in it. I wrote the same code form video extraction and that worked properly without any error. I debugged the code and came to point that line no 'avformat_write_header( oc, &opt ) ' is giving this error. Exactly one MP3 audio stream is required.'. I wrote the code below but i got an runtime error : 'Invalid audio stream. It will delete them as soon as you close the project, but it is good to keep it in mind before trying to work and then failing to perform an export.I'm try to build an app in c that extract audio from video and save it as mp3 file. Many other plugins can be found in the sidebar by category. In the following pop-up windows, which will be one per audio track segment, if you do not need to make changes just hit the OK button enough times to get the export process going.Ī note on using Audacity on large audio files (which we assume applies to many other serious audio processing applications): When you open the audio file, Audacity will pre-process it, and it will take several GBs of disk space to use for its metadata. FFMPEG, a library to import and export various media formats such as M4A, WMA and MP4.Unless you need specific settings, select the folder where you want the new file parts to be created and hit the Export button.Once you are happy with the results, go to the menu File then select the category Export and finally the option Export Multiple.If the file was not split as you expected, press ctrl + Z to undo the operation, then go to step 2 again and try with different settings. You will see a new row appearing that will demonstrate in ranges the new parts that were created.Press OK and give it some time to process the file and add labels around the new parts.

For example the noise level or the minimum duration of silence that should indicate a new part, etc. Go to menu Analyze and select the option Label Sounds.

Select the part of the audio that you want to automatically split to multiple parts or press ctrl + A to select all the track.

The steps to follow after you open your audio file are:

How to extract audio from a video using audacity ffmpeg