Gapless audio in video?

Question

It's possible to produce mp4/webm videos without sound that loop seamlessly, but if you add sound to the video with matching length it adds a noticeable stutter at the end, even if the audio is slightly shorter than the video.Is it possible to produce a web friendly (mp4/webm) video with sound that is gapless?I use Adobe products and ffmpeg to produce my videos, if that matters.

Answer 1

You would need to ensure the audio ends in silence, and it should work. Most audio includes "room tone" which is generally considered silence but will be noticeable with even a slight gap of true silence (room tone can be as loud as -70db and still be unnoticed on most speakers). To get rid of the room tone, you can either use a noise gate to completely remove it or an expander to push the room tone to low to be heard (less than -120db would work best, but it will depend on the speakers used). The gate would be the more effective option, but you would need to be careful about cutting out any of the quieter audio in the clip.

Either option can be done effectively in Adobe Audition, so you should be able to implement it without much trouble. If you don't have Audition, you can get Audacity for free and use those effects.