hi, Since my portable audio player not support ape, thus I converted to flac. I use foobar2000 do the stuff. Here are my fb2k configuration: fb2k latest version flac-1.2.1 FLAC level 5 But the problem is, I test 20 different ape files+ to flac, but after convertion the flac bit rate is not the same as original ape file My question is, since both format are "loseless", why the ape bit rate and flace bit rate are not the same? Some "component" is missing? Or something's wrong..? Hope I can figure what's going onthanks for help~
The bitrate is the compressed bitrate, not the uncompressed rate which will be bit identical / equal. APE and FLAC have different algorithms and I would expect some differences in the amount of compression each can achieve and therefore the bit rate would change. Use FLAC level 1 and you'll get a higher bit rate than FLAC level 8 - but they will produce bit-identical outputs after decoding. IIRC, APE compresses more than FLAC typically so I would expect a larger file for FLAC and hence a higher bit rate reported, although the decoded output will be identical between APE and FLAC.
how can i know the original cd bitrate..?
A lossless compressed file cannot be restricted to a specific bitrate, as it wouldn't be lossless if you threw away any bits.
Quote from: odyssey on 11 July, 2011, 07:50:33 AMA lossless compressed file cannot be restricted to a specific bitrate, as it wouldn't be lossless if you threw away any bits.To add, though: it can have a mean (often reported using the term average, but anyone who’s studied a tiny bit of statistics knows to frown upon that!) bitrate, which will be what thinksloth saw. The reason the mean bitrate differs between formats is that, for any given waveform, the encoders will be of differing efficiencies; one will compress it to a smaller total file size than the other.
And i also interested to know why some ape/flac files have such a low compressed bitrate, e.g. 290 kbps
I know when such a low bitrate require more cpu work when decode, but it can save the portable media player storage.