Transcoding problem

[DM-UK]

I've only just come across this application, and so far it seems to be very nice, I do however have a big problem with it

I am using apple lossless files, which I transcode with a command line utility. I have managed to compile and get it working properly on windows, so far I have sucessfully integrated apple lossless with the Jinzora jukebox.

The issue (I've not done much with java - so its a bit of a guess) is the stdin/stdout mode. When I was first compiling the source (http://craz.net/programs/itunes/alac.html) I had to alter the file mode to binary for stdin/out otherwise any files output from the command line would only be static.

I assume that during the transcode in java that there is a non binary stream somewhere, I am using the same settings and execubles to transcode via stdin/out with php. This uses alaccommand | lamecommand with an exec().

I'm not quite sure how to work it out, so if any ideas are welcome.

David

[sindre_mehus]

Hi David,

It's a bit unclear to me whether it worked or not after you changed stdin/stdout to binary. Also, it seems to me that binary mode is supposed to be used on Windows. From main.c:

Code: Select all

#ifdef WIN32
    setmode(fileno(stdout), O_BINARY);
    setmode(fileno(stdin), O_BINARY);
#endif


Anyway, if you only get static noise, it's most likely wrong byte order (little-endian vs big-endian). Did you try to add the "-x" option to LAME? It swaps the byte order.

By the way, I only use binary streams in the Java transcoding engine.

Hope this helps,
Sindre

[DM-UK]

oops!

I've just noticed that when I reused the default m4a setting I forgot to remove the -x from the lame command line!

Problem solved

David