Hi to all.

Everybody know some good soft for mp3, but I need normalizer and cutter for MP2.

Thanks for any software suggestion.

Cutting MP2 can be done by MP3DirectCut.

Normalizing is not as easy as with MP3 because there is no global_gain field in the bitstream.

Edit: it should be possible to adjust the scalefactor for each channel->subband->granule. But it is not guaranteed that you can raise it (it may be already max value)

I see.
I already using Mp3DirectCut for splitting, so mp2 normalize is impossible.
Thanks.

Then I will just encode this mp2 to mp3 and later split and normalize mp3, any suggesstion how to do it with lame?

My MP2 file is DVB (digital satellite) stream in format 192 kbps, 44.1kHz stereo, and I think that 160kbps be good enough for lame mp3 format (don't want VBR beacuse I need it for DJ mixing software which support better CBR files).

What option to use in lame to convert mp2 to 160kbps high quality CBR mp3.

Thanks.

lame --alt-preset cbr 160 --mp2input infile.mp2
that allows you direct transcode from mp2 to hq-cbr-mp3

Is there any special mp2-modify software? I have some mp2s were the left channel is ok, the right is just silence. I like to remove the right channel lossless and create a mono file (with the same bitrate).

Exactly the same problem. Could anybody advise any tool?

Yes, BeSplit 0.9b8. Direct link: BeSplit 0.9b8 That one is a non-official beta (the most recent visible one is BeSplit 0.9b6).

Use the commandline with the following set of commands:

besplit -core( -input <input.mp2> -output <output.mp2> -type mp2 -demux )

You will get no file <output.mp2> (but you need to provide the -output switch otherwise you get nothing) but two mono mp2 files. These two files are named: (null)-L.mp2 and (null)-R.mp2 For a 192kbps mp2 input file both mono files have 96kbps each.

You will probably experience strange sounds if you try to play the two mono files but your mileage may vary with the type of stereo your mp2 files are encoded in. Joint stereo almost certainly will not work.

But try it! Maybe in your special case it will work!!!



Normalizing MP2 is best done with the MP2gain feature of the newest BeSplit beta BeSplit 0.9b8.

besplit -core( -input <input.mp2> -output <output.mp2> -type mp2 ) -ota ( -G max )

The beSplit beta is the only tool to offer Mp2 normalization / Mp2gain. You have no choice, you need to use it. But the BeSplit beta is also quite buggy, it usually increases the gain even if you tell the program to reduce it (negative values are treated as positive gain values!). The only working possibility to reduce the gain is actually provided by the "-ota( -G max )" switch. That one works and helps avoiding digital clipping!