Here, you can pretty much use whatever formats Openshot supports to render video as you want it. I could click the eye icon on the audio track to hide the video – since there isn’t any it won’t make any difference, but I could use this in Openshot to mix a soundtrack from one file with the visuals and sound of another.Īfter giving it a quick play in the preview window, checking sound and visuals are still in sync and the sound is still satisfactory, it’s a simple process to use the Openshot presets to render the remastered project to a new video file. Importantly, mute the original audio on the video track – click on the little speaker/volume icon and the sound wave graphic changes to three dashes (muted). I fired up a new project in the Openshot video editor then dragged and dropped the original video file and cleaned up audio file into the project files area and from there, dropped each into a new track in the Edit area – making sure the start positions are aligned in the timelign. Happy with the audio quality, I exported it back out in the same lossless format from Audacity. In my example I ran some noise removal – not too extreme, just good enough was ‘just good enough’ – ran the hard limiter to cut unwanted peaks, normalised back to -0.3Db, and that was about it. Either way, with a buffered copy of the audio in Audacity, you can go ahead and clean it up. I just thought it was worth showing you how ffmpeg does it’s thing.
Openshot video editor mute track mp4#
mp4 file into Audacity directly the audio editor understands so many digital formats, that it looks inside the video container, uses ffmpeg itself, pulls in the audio track and ignores the rest. m4a file into Audacity where you can do more or less what you like with it – noise removal, normalise, limiter, equalise – just don’t trim or shorten the run length.Īt this point, I confess, I could have just imported the video. This very quickly produces a separate audio file from the video soundtrack. Video:0kB audio:1373kB global headers:0kB muxing overhead 6.596438% Please use avconv instead.īut it’s here for now and remains the Swiss-army knife of digital audio-video. This program is only provided for compatibility and will be removed in a future release. Using the venerable ffmpeg, which is a command-line tool, copy the original dirty audio as-is to a lossless. Don’t trim either one separately or you’ll no longer have sound synced to the pictures!įirst step is to lift the dirty audio track from the source video. Note: if you are going to edit any video for length or sequence, either do it before or after you clean the audio. I believe in using the right tool for the job, so I lifted out and cleaned the audio track in Audacity, then put it back with the original visuals using Openshot.
But it is possible to clean up the sound track using a sound editor.
You can chop it, splice it, remove it – but clean it? No. Most video editors (certainly on Linux) have limited capability for sound. I’m not planning to broadcast this in HD any time soon, but as it’s educational material, it would be good if folks could hear what the instructor has to say.
Let’s say I have some HD video shot on my Samsung Galaxy SII: for a phone it’s a good video camera and ordinarily picks up pretty good sound, but, thanks to the venue (your typical tin-shed sports centre) and the other activities (toddlers on bouncy castle, bless ’em) the sound quality was terrible.
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