I am using LAME 3.92 to compress sonar time-series with good fidelity
up to compression ratios of about 16:1. However, for some waveforms
I get the following message when the mp3 file is decoded using mpg123:
Frame # 17 [1723], Time: 00:01.22 [02:04.05], mpg123 : Can't rewind stream by
6 bits!
Frame # 217 [1523], Time: 00:15.62 [01:49.65], mpg123 : Can't rewind stream by
9 bits!
.
.
for several frames. The actual call to LAME was
lame --resample 8 -mm -b8 --verbose -q0 --noath --notemp -k temp.wav
temp.mp3
for a compression ratio of 16:1. The decoding errors do NOT occur if the bitrate
is
bumped up to 16 (compression ratio of 8:1). Moreover, the decoding errors also do
NOT occur for the same call as above using a different waveform.
Are these encoding or decoding errors? If they are encoding errors, how are
they
dependent on the input waveform? No error message is printed when lame is executed,
only when mpg123 is run. If need be, I can attach the waveform which produces the
errors.
Thanks,
Joe
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