Then I tried using Mp3Splt (version 2.6.2 on the same OS. This generates a file that is 3 minutes 58 seconds long but the start time corresponds to 20:28 in the original file. I tried this first using FFmpeg (version 4.2.7-0ubuntu0.1 on Ubuntu 20.04), with this command: ffmpeg -i "/home/user/GQT_.mp3" -ss 00:20:48 -t 00:03:58 GQT_Snippet1.mp3 I would like to extract a snippet that starts at 20:48 and lasts 03:58, so it finishes at 24:46 The file is downloaded and plays correctly.
Mp3 extraction download#
I start off by using yt-dlp to download a podcast, such as this one with this command: yt-dlp -x -audio-format mp3 -o GQT_.mp3 Problem Description / Reproduction steps:
Note: I realise there are other approaches to share the content, I'm doing it this way to share the content with users who are either not very computer literate or geo-blocked from the raw content. I get consistent, unexpected results and I believe this is due to how the audio files were created/encoded. The following demonstrates the process in Ocenaudio.I am trying to extract audio snippets using command line tools. In Audacity: Click the arrow next to the file name and choose “Split Stereo to Mono.” Edit and save the channel you wish to keep and discard the other.In Adobe Audition: Right click on the file in the Files panel and choose “Extract Channels to Mono Files.” Edit and save the file you wish to keep and discard the other.If one of the channels is blank, choose “Split to Mono Files.” Edit and save the file with the audio information and discard the other. If the two channels are the same, choose “Convert to Mono”, and they will be merged. In Ocenaudio: Right click on the file in the file panel on the left.(Note that if you can tell that the channels are slightly different, indicating the file is actually stereo, you should leave both channels.) The same process should be followed if one of your channels is blank. In this case, you can remove one of the channels during the editing process. Most cameras-and some recorders-make “two-channel mono” audio tracks, two separate channels that are identical (see example below).Be sure to note the camera you used to make the recording in the “Recorder” data field when you upload it to your eBird checklist.This gives you more control over what you’re recording and eliminates the need to deal with video files. If you’re using a smartphone to record, we recommend downloading an app and recording audio files directly.After you have saved the audio track as an audio file, please follow our audio preparation guidelines before uploading it to your eBird checklist. In Ocenaudio, the WAV format to choose is called “Wav PCM Linear.” In Audition, it’s “Wave PCM.” In Audacity, “WAV (Microsoft).” If another option is shown, change the file type to WAV.
As long as they are either WAV or MP3, you can save them with these default options. These should be autofilled with the properties of the audio on the video file. Specify the resolution and file type you want to save as. Choose “Save As…” and the Save As dialogue should open. (Note: if the program asks you to specify the resolution of the file before it can import it, make sure you have the latest version of the software, or try with a different program.) The file should display in the Files pane on the left side of the screen, perhaps after a few seconds of processing. Drag the file into the program window, or choose “Open…” and choose the file. Here are general instructions for using an audio editing program: Other video-based programs may have the ability to export a video as “audio only,” so that is also option. Audacity (free) also works but requires the installation of a the FFmpeg library first. Using either of the popular editing programs Ocenaudio (free) or Adobe Audition (subscription based), extracting audio is as easy as dragging the file into the program, then performing a Save As on the resulting file. Luckily, it’s easy to extract the audio track from a video file and treat it like any other sound recording.
However, if you have a video where the audio is the main focus, you should upload the recording as an audio file rather than a video. Taking a video can be an easy way to capture an interesting sound in the field if you don’t have another recording device.
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