slimnick Wrote: > So, I've been messing around again this afternoon and have got a little > closer to figuring out the root cause of this problem. It appears not > to be the Slimserver per se, but instead to be the act of transcoding > from AAC to another format via the stdio. > > I have performed a number of tests, with the following results: > > 1. Decode an AAC file to a WAV. > COMMAND USED: faad infile.m4a outfile.wav > RESULT: When I play the .wav using windows media player, there is no > noise. > > 2. Encode the .wav from test 1 into an MP3 manually. > COMMAND USED: lame infile.wav outfile.mp3 > RESULT: When I play the .mp3 using windows media player, there is no > noise. > > 3. Transcode an AAC to MP3 via stdio > COMMAND USED: faad -w infile.m4a | lame - outfile.mp3 > RESULT: When I play the .mp3 using windows media player, the music > plays but with the same background noise as seen when listening via my > Squeezebox and Softsqueeze. > > CONCLUSION: > From the tests above, there seems to be a limitation when transcoding > from AAC to another format via stdio. As a result, using this method of > transcoding with Slimserver will introduce an unacceptable level of > background noise. > > I will update my bug with this information, as since this is the > transcoding method Slimdevices recommend when running Slimserver on a > Linux server, I believe this is not an acceptable solution. If I can > find a way to bypass transcoding and stream the raw music off of my > server then that should hopefully solve this problem. Otherwise I'm > afraid I'll be installing Windows again... > > Nick.
Hey, great slooth work! It would be interesting to try a different shell and see if that changes it. Assuming it's not the shell itself (which it probably isn't), it would be good to see whether the problem lies with faad or lame. One way would be to do (starting with known good infiles): faad -w infile.m4a | cat > outfile.wav and cat infile.wav | lame - outfile.mp3 -- LavaJoe ------------------------------------------------------------------------ LavaJoe's Profile: http://forums.slimdevices.com/member.php?userid=2331 View this thread: http://forums.slimdevices.com/showthread.php?t=18219 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
