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22nd October 2016, 21:49 | #1 | Link | |
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Recommended LC-AAC 5.1 quality setting?
I would like to transcode lossless 5.1 DTS-HD and Dolby TrueHD Audio into lossy 5.1 LC-AAC (Nero AAC Codec) to save space. What -q quality setting would still sound transparent at your experience?
Wikipedia: Quote:
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22nd October 2016, 22:19 | #2 | Link |
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Is there any particular reason why you don't want to use HE-AAC?
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23rd October 2016, 09:28 | #6 | Link |
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@lvqcl: You are absolutely right. I meant q 0.4. I was so tired last evening, I have not remembered the exact number. 0.3 is to low.
@kuchikirukia: Thank you! I did not know QAAC at all. After what I could read the Apple AAC codec is really better than Nero AAC. I am not looking to skimp, i am looking for high quality transparent sound without wasting space. I will try that q91 and above settings. You guys helped me a lot! |
23rd October 2016, 10:57 | #7 | Link |
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Use q91 TVBR (-V 91) with QAAC is, more or less, equivalent to use -q 0.5 with NeroAacEnc.
QAAC is better than NeroAacEnc at low bitrates, at high quality like this can't be tested, both are transparent. In my test I obtain 450 Kb/s (-V 91 qaac) and 443 Kb/s (-q 0.5 Nero) with the same 5.1 sample. If you want 320 Kb/s you can try the CVBR mode with QAAC -v 320 (v lowcase) With the same sample I obtain: Code:
Nero 5.1-48 | Qaac 5.1-48 ------ -------- | ------ -------- q 0.35 266 Kb/s | -V 54 277 Kb/s | -V 64 314 Kb/s q 0.4 325 Kb/s | -V 73 351 Kb/s | -V 82 385 Kb/s q 0.5 443 Kb/s | -V 91 450 Kb/s | -V 99 507 Kb/s q 0.6 545 Kb/s | -V 109 581 Kb/s | -V 118 638 Kb/s q 0.7 738 Kb/s | -V 125 704 Kb/s q 0.8 796 Kb/s | q 0.9 914 Kb/s |
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 23rd October 2016 at 11:13. Reason: add info |
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