... for compatibility issue with car audio mp3 reader?

ex., switch the header of mp3 192kb encoded whit lame, with fraunhofer header..
...without mp3 recompression and quality loss.

it's possible?

the mp3 still playable?

exist some win utility to make this?

thanx and sorry for my bad english

Sorry, but your question should be: Is it possible to return the MP3 player to the store and get a decent one?

mhhh, yes, I think that

Umm... I don't think it has anything to do with the encoder being LAME or Fraunhofer. The MP3 standard is a standard. Both encoders should produce a playable MP3 bitstream. If your car player does not support 192 kbps, it won't support it - regardless of the encoder being LAME, FhG, Xing or anything else.

the player have decoding problems with mp3 LAME, works perfect with mp3 fraunhofer... but... at this point, I think to change mp3 player


thnx for reply

I remember I've read somewhere on this forum that it's a problem with stereo MP3s where the two channels use different block types, which IS possible and valid regarding the MP3 standard. So in fact your player is not 100% standard compliant. A friend of mine has the same problem with his "MP3 capable" DVD player.

However, you can't "patch" the MP3 to workfine in your player, so the answer to your question is NO.

Maybe you should say what player that is so other people will not have to suffer as well.

Is it from Panasonic, Clarion or Sony?

By looking into mp3encoder archives you should find a tool to transform your standard mp3 files to files decodable by you uncompliant player.

panasonic!

now I don't remember exactly the model name.

but, maybe, the problem can depends of the firmware revision of the player (?)

try this command line please (lame 3.90.3 or 3.95.1)

lame.exe --alt-preset cbr 192 -t --strictly-enforce-ISO

-t disables the lame tag which is not really needed for CBR files anyway. Do not use this with VBR files
-iso limits the size of the bit reserviour a little, but at 192k it should have no negative effect. Do not use this with VBR files or very high bitrate CBR.

That produces the most hardware friendly output possible with LAME, as far as I know.

The problem with Panasonic units is that they are unable to decode streams where left and right blocks are of a different type.

In Lame this (up to now) can only happen when encoding in stereo. If you use joint stereo (used by default by all --preset), then you decoder will be able to understand the bitstream fine.

Ah, from what I understand here, someone's been using the -m s switch with the presets?

thanx for suggestions

Hi!

--strictly-enforce-ISO



"Do not use this with VBR files or very high bitrate CBR." ?

The lame documentation :
"
--strictly-enforce-ISO strict ISO compliance
With this option, LAME will enforce the 7680 bit limitation on total frame size.
This results in many wasted bits for high bitrate encodings but will ensure strict ISO compatibility. This compatibility might be important for hardware players.
"

In the documentation, I'm not see "Do not use this with VBR files or very high bitrate CBR."

Thanks

Wasted bits at higher bitrates to me implies that the higher the bitrate the more negative the effect is. VBR is generally around or higher than 192kbps. And of course 320kbps is much higher. So while it doesn't directly say it's not recommended it seems clear that it may not be a good idea.