LAME --comp
אריאל קלגסבלד Ariel Klagsbald <[email protected]>
| Newsgroups | gmane.comp.audio.mp3.lame |
|---|---|
| Message-ID | <CAOejwRS3twHgM=Ef8Z3Taqmi2FY6a9e9upgMDddyjcGY8_JCDg@mail.gmail.com> |
The '--comp' option seems to be underdocumented. At least to me. I says that the arguemnt is the compression ration which is to be achieved. Does it mean that with an argument of 10, the new size will be 90% or the original? or should I give 1.1 for that? Anyway, can anyone make any sense of this: $ lame file.mp3 file1.mp3 --comp 1 --quiet $ lame file.mp3 file1.1.mp3 --comp 1.1 --quiet $ lame file.mp3 file4.mp3 --comp 4 --quiet $ lame file.mp3 file10.mp3 --comp 10 --quiet $ lame file.mp3 file100.mp3 --comp 100 --quiet $ lame file.mp3 fileres8.mp3 --resample 8 --quiet $ ls -l file* -rw-rw-r-- 1 arielk arielk 1302848 May 15 10:52 file100.mp3 -rw-rw-r-- 1 arielk arielk 5178583 May 15 10:51 file10.mp3 -rw-rw-r-- 1 arielk arielk 25849695 May 15 10:51 file1.1.mp3 -rw-rw-r-- 1 arielk arielk 25849695 May 15 10:50 file1.mp3 -rw-rw-r-- 1 arielk arielk 12930316 May 15 10:51 file4.mp3 -rw-rw-r-- 1 arielk arielk 5178502 May 15 10:21 file.mp3 -rw-rw-r-- 1 arielk arielk 1302976 May 15 10:52 fileres8.mp3 It seems that compression rate of 1 actually increases the file size. It's not what I would except of a 'compression'. So what's going on? BTW the input file is 22.05 kHz. It seems that the best compression I've achieved (100) is even better that resampling in 8 kHz. What else does it do? what is the best way to achieve minimum filesize? I don't care about quality, as it's a speech file anyway, not music. P.S. The '-S' option also seems to be underdocumented. The manpage lists all three option '-S', '--silent' and '--quiet' together, but apparently they aren't the same. -S isn't totally silent, while the other two seem to. -S was silent at prior versions of LAME, but as for 3.99.5 it does speak. P.S.2 Unrelated, I noticed that when I don't give any tag information (e.g. --ty or --tg), LAME tends to preserve the original tags. I didn't find this feature anywhere in the docs. Is it a feature I can rely on? Thanks for any help. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/