LAME -q switch: Difference between revisions
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m moved LAME Q Switch to LAME q Switch: the quality switch is lowercase. |
(No difference)
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Revision as of 15:41, 3 June 2013
Internal Variables
| -q n | huffman search | full_outer_loop | sv_qnt.substep_shaping | subblock gain | noise shaping | amplification | stopping | description |
|---|---|---|---|---|---|---|---|---|
| 0 | best | 1 | 2 | 1 | 1 | 2 | 1 | Use slowest & best possible version of all algorithms. |
| 1 | best | 0 | 2 | 1 | 1 | 2 | 1 | |
| 2 | best | 0 | 2 | 1 | 1 | 1 | 1 | Recommended. Same as -h. -q 0 and -q 1 are slow and may not produce significantly higher quality. |
| 3 | best | 0 | ? | 1 | 1 | 1 | 1 | Default value. Good speed, good quality. |
| 4 | best | 0 | ? | 1 | 1 | 0 | 0 | |
| 5-6 | normal | 0 | ? | 1 | 1 | 0 | 0 | |
| 7-8 | normal | 0 | ? | -1 | 0 | 0 | 0 | Same as -f. Very fast, ok quality. (psycho acoustics are used for pre-echo & M/S, but no noise shaping is done. |
| 9 | normal | 0 | ? | -1 | 0 | 0 | 0 | Disables almost all algorithms including psy-model. Poor quality. |
VBR
| -q n | description |
|---|---|
| 0-4 | Default value. Use the best algorithm. |
| 5-6 | Use the not so good algorithm |
| 7-9 |
Observations
- -q 5-6 Output Same Results. LAME header will indicate the different quality parameter. But the files are otherwise a perfect match.
- -q 7-8 Is always mapped to -q 7 and thus outputs identical files, including the LAME header.
- -q 9 Output is same as -q 7. But official doc describes it as a different quality. LAME header will be different for CBR/ABR and identical for VBR.