MobileRead Forums - View Single Post - Nook Color: Can't Play sideloaded m4v videos

swallman · 01-03-2011, 07:48 PM

Krypto,

I did some looking myself for a way to increase the gain and came across this. You need to download the FFMPEG libraries and also Wavegain, but then you can run a script something like this.

Basically the first step pulls out the video stream from the MP4 file. The second step pulls out the audio file into WAV format. Then run it through Wavegain (there are more options available). Finally put all the files back together.

I've only tried it once so far and it only added about 5db with the default Wavegain settings so I need to play with it some more.

ffmpeg -i myfile.mp4 -an -vcodec copy -y video1.mp4
ffmpeg -i myfile.mp4 -vn -y audio1.wav
wavegain -r -n -y audio1.wav
ffmpeg -i video1.mp4 -i audio1.wav -vcodec copy -acodec aac -ab 128 -y ouput.mp4

01-03-2011, 07:48 PM	#134
swallman Enthusiast Posts: 27 Karma: 14 Join Date: Nov 2010 Device: Nook Color	WaveGain Krypto, I did some looking myself for a way to increase the gain and came across this. You need to download the FFMPEG libraries and also Wavegain, but then you can run a script something like this. Basically the first step pulls out the video stream from the MP4 file. The second step pulls out the audio file into WAV format. Then run it through Wavegain (there are more options available). Finally put all the files back together. I've only tried it once so far and it only added about 5db with the default Wavegain settings so I need to play with it some more. ffmpeg -i myfile.mp4 -an -vcodec copy -y video1.mp4 ffmpeg -i myfile.mp4 -vn -y audio1.wav wavegain -r -n -y audio1.wav ffmpeg -i video1.mp4 -i audio1.wav -vcodec copy -acodec aac -ab 128 -y ouput.mp4