Or you might want to import the audio track into Word and get Word to automatically convert it into text to use as a script (see ). Or you might want to cut it up into separate audio files, one for each slide (again, I’d look at using Audacity for this it’s not something I’ve done, but I expect it’s possible). For example, you might want to keep it intact, but cut bits from the beginning or end, or anywhere within the recording ( Audacity is good for this). Once you have the audio track, you can do other things with it. It supports many file types, including AVI, DVD compatible MPEG files, MP4, and ASF, using a variety of codecs. Navigate to where you want to save the audio, give the file a name, then click Save. Avidemux Portable is a free video editor designed for simple cutting, filtering, and encoding tasks.Select Audio > Save Audio from the menu.Select the Audio Output type from the drop-down list on the left (I chose MP3).Open the MP4 file you want to extract the audio from ( File > Open, navigate to and select the MP4 file).If not, the only option would be to export the audio track as WAV (PCM audio 'encoder' in Avidemux), load it in Audacity or in an equivalent wave editor and stretch it to the duration of the unmodified video, then import it as an external audio track in Avidemux. I used the Windows version of Avidemux (free available here: ), and it took less than 2 minutes to save the audio track from an hour-long presentation. If the result keeps good A/V sync during the entire duration great. Navigate to where you want to save the audio, give the file a name, then click Save.Select Audio. I’ve done another on using Word to automatically convert it into text ( ). Once you have the audio track, you can do other things with it. This post is about getting the audio out of the MP4 recording. In the end, however, I ended up just extracting the audio and transcribing it with Word, then editing that transcription and using it as the basis of a script for another recording. When you go to save the audio, add an '.aac' file extension to it. You don't need to re-encapsulate the audio within another container when you extract the audio from an MP4. 10.9K subscribers Subscribe Share 397 views 2 years ago IAmMrHelper MrHelper Avidemux This video is for you if you're having trouble extracting audio from videos. video and audio, as well as metadata, and to facilitate the synchronised playback of the streams. I was really happy with the audio that accompanied the slides and I wanted to extract it, delete the parts that were specific to that webinar, and then re-use it. A container is to hold multiple media streams, e.g. Extract the original audio only file from the movie, with the help of AVIDMUX, open movie in Avidemux and go to Audio->Save Audio. I had a Zoom recording of a presentation I’d done for a webinar.
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