I have a bunch of video files, and in some videos the sound is loud, in the others—not. So a user has to change the volume of her player when she watches these videos in the playlist. I want to level out the loudness in every video, so it's the same everywhere. How can I do it?
The videos contain human voices. All sound streams are in MPEG Layer-3 format. I will upload them on Youtube so playing with the settings of the player doesn't help.
What you would want to do in this case is a Batch Encode on all of your files that you need to adjust the volume on, except re-encode them all with the same format and settings as they originally were- but change the audio portion of the encode. Most software should allow you to do this; Adobe Media Encoder CS6 allows you to set a fixed audio gain/volume for the videos you are encoding, and during the encode each video's audio will be normalized to this level. I'm sure many other softwares have this feature- software such as Handbrake or Apple Compresser.
