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LAME MP3 encoding starts fast then slows down
Kaze3
post Apr 27 2012, 10:17
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Hi all.

I've been converting some FLAC files to MP3 using foobar and LAME 3.99.5 (64-bit). I find that the encoding starts at ~220x with 100% CPU usage, but after a short time (varies) it drops to ~60-80x with the CPU usage dropping significantly as well. I'm wondering if I'm being limited by the hard disk speed - I've tried converting with the source and destination on the same drive, and also the source on the HDD and the destination on my SSD drive and I see the same behaviour with both. I've also tried the 32-bit LAME encoder and the one that's built-in to foobar (same behaviour).

Can anyone suggest whether something's going wrong of if I am indeed limited by my hardware (HDD or otherwise)? Thanks.
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Posts in this topic
- Kaze3   LAME MP3 encoding starts fast then slows down   Apr 27 2012, 10:17
- - megar   Audio encoding is not very well suited for multi-t...   Apr 27 2012, 12:04
|- - Kaze3   Sorry I haven't replied for so long. I'm s...   Jun 12 2012, 19:42
- - Ouroboros   It's highly likely to be limited by disk I/O, ...   Jun 12 2012, 20:05
|- - dumdidum   QUOTE (Ouroboros @ Jun 12 2012, 21:05) It...   Jun 12 2012, 22:40
|- - Ouroboros   QUOTE (dumdidum @ Jun 12 2012, 22:40) I...   Jun 12 2012, 23:16
||- - dumdidum   QUOTE (Ouroboros @ Jun 13 2012, 00:16) QU...   Jun 12 2012, 23:37
||- - Ouroboros   QUOTE (dumdidum @ Jun 12 2012, 23:37) the...   Jun 13 2012, 00:02
||- - washu   QUOTE (dumdidum @ Jun 12 2012, 18:37) the...   Jun 13 2012, 01:05
|- - saratoga   QUOTE (dumdidum @ Jun 12 2012, 17:40) QUO...   Jun 12 2012, 23:26
|- - dumdidum   QUOTE (saratoga @ Jun 13 2012, 00:26) 4*2...   Jun 13 2012, 00:04
|- - saratoga   QUOTE (dumdidum @ Jun 12 2012, 19:04) QUO...   Jun 13 2012, 00:54
- - washu   Try running a test conversion with both the source...   Jun 12 2012, 20:24
- - probedb   It's also not necessarily true that running an...   Jun 12 2012, 21:56
- - pdq   The input file is much larger than the output, so ...   Jun 12 2012, 22:29
- - dumdidum   QUOTE (saratoga @ Jun 13 2012, 00:26) 4*2...   Jun 13 2012, 01:06
|- - saratoga   QUOTE (dumdidum @ Jun 12 2012, 20:06) so ...   Jun 13 2012, 02:26
|- - dumdidum   QUOTE (saratoga @ Jun 13 2012, 03:26) So ...   Jun 13 2012, 08:42
- - skamp   QUOTE (dumdidum @ Jun 12 2012, 23:40) are...   Jun 13 2012, 09:29


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