Removing external sound from a recorded video can be challenging, especially if the sound is mixed with the original audio. However, depending on the specific situation and the tools you have available, there are a few possible approaches you can try:
Audio editing software: If you have access to audio editing software, you can import the video file and the audio file separately, sync them up, and then use the audio editing tools to remove or reduce the external sound. This process typically involves using filters, equalizers, or noise reduction techniques to isolate and minimize the unwanted audio.
Separate audio channels: Some video editing software allows you to work with separate audio channels. In this case, you can extract the external sound to a separate channel and then mute or lower the volume of that channel to reduce its impact on the final video.
Manual editing: If the external sound is significantly different from the original audio, you might be able to manually edit the video by cutting out portions where the unwanted sound is present. This approach requires precision and careful editing to ensure the final video remains coherent and synchronized.
It's worth mentioning that the success of these methods depends on various factors, including the quality and clarity of the original audio, the nature of the external sound, and the tools you have available. If the external sound is too loud or the two audio sources are heavily intertwined, achieving a clean removal may be challenging.
In any case, it's advisable to work with a backup copy of the original video file before attempting any editing, as it allows you to experiment without risking the loss of your original footage.