As an proud owner of the SB1: would it be difficult to implement it on the SB1 or solve it in Slimserver?
Karel On Fri, 11 Mar 2005 07:27:51 -0800, Vidur Apparao <[EMAIL PROTECTED]> wrote: > > It seems like the LAME INFO tag (described at > http://gabriel.mp3-tech.org/mp3infotag.html) does include the number of > padding samples. Bugs 1026 and 838 (they should probably be DUPed) cover > this issue. I think it's a fixable problem for Squeezebox2...possibly > not for initial launch, but shortly thereafter. > > --Vidur > > Familie Tromp wrote: > > > Hello Phil, > > > > Information about amount of frames etc. is found on the following > > site. It says too that frames are added at the end AND the beginning > > of each mp3 file. > > > > http://lame.sourceforge.net/tech-FAQ.txt > > > > > > "3. Why does LAME add silence to the end of each song? > > > > Extra padding at the end of a file can be caused by a couple of things: > > > > 1. Because the MDCT's are overlapped, it looks something like this: > > > > <--576 MDCT coefficients--><--576 MDCT coefficients--><--576 MDCT > > coefficients--> > > <-- 576 samples PCM output --><-- 576 samples PCM output --> > > > > So no matter where you truncate your MP3 file, the last 288 samples of > > that granule will not be decoded. So LAME appends 288 samples of > > padding to the input file to guarantee all input samples will be > > decoded. > > > > > > 2. If the number of samples is not an exact multiple of 1152, > > then last frame of data is padded with 0's so that it has 1152 > > samples. > > > > > > Before lame3.56, we just added a few extra frames to make sure all > > internal buffers would be flushed. In lame3.56, we tried to pad > > with the exact minimum number of samples needed. And in lame3.80, > > we finally fixed the bitstream flushing so that the final mp3 > > frame is properly padded with ancillary data. " > > > > > > Regards, > > > > Karel Tromp > > > > > > <reaction Phil Karn> > > Ah, I see. And I take it there's no field in the header that tells you > > how many audio samples are *really* in the track? If you had that, then > > you could just pad out the data during encode, and discard extra samples > > during decode. > > > > What is the size quanta, i.e., how much padding can be needed, worst > > case? > > _______________________________________________ > > Discuss mailing list > > [email protected] > > http://lists.slimdevices.com/lists/listinfo/discuss > > _______________________________________________ > Discuss mailing list > [email protected] > http://lists.slimdevices.com/lists/listinfo/discuss > _______________________________________________ Discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
