How to make audio louder?

[hiimbored]

Hey, I have 3 MPEG files and I want to convert them to DVD. But the sound of the files is really quiet, I can barely hear it. So how can I make the sound louder on the DVD? Please let me know, thanks!

[mats.hogberg]

By demuximng the audio out of the MPG, convert it to WAV, run it thru some audio editor like Audacity to increase the volume, reencode the audio to its original format and finally multiplex it back with the video into an mpg.

/Mats

[hiimbored]

By demuximng the audio out of the MPG, convert it to WAV, run it thru some audio editor like Audacity to increase the volume, reencode the audio to its original format and finally multiplex it back with the video into an mpg.

/Mats

damn, thats the easiest way?

[mats.hogberg]

More or less. There may be some tool that automates the process, but all these steps have to be performed.

/Mats

[Alex_ander]

It is also important to mux audio back with the same delay as it was in original MPEG (not always but sometimes audio/video stream durations don't coincide). A simple way to get audio delay value is using DGIndex for demuxing, it puts that value to the name of demuxed audio stream. Then you can add proper ammount of silence in the beginning after you normalize volume in your sound editor (like free Audacity). This ensures that after reauthoring with modified audio you won't get audio/video synch problems.
If your demuxed audio is .mpa or .mp2, you don't need decompressing it and can normalize it using MP3DirectCut that supports .mp2.

[Soopafresh]

Try this VobGain script. Just wrote the batch file today, but I'd appreciate it if you'd test it out on your files. It'll automate the process of demuxing, normalizing, then re-muxing. Rename your mpegs with a .vob extension before you run the batch. It won't modify your original files.

Bottom of this thread has the link and the instructions.

https://forum.videohelp.com/viewtopic.php?t=315051