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Topic: CBR AAC Encoder (Read 6472 times) previous topic - next topic
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Re: CBR AAC Encoder

Reply #50
Using wrong tool for the job. Use sox for the job, then pipe the result to encoder of your choice.
TAPE LOADING ERROR

Re: CBR AAC Encoder

Reply #51
Using wrong tool for the job. Use sox for the job, then pipe the result to encoder of your choice.

@itisljar You recommend me using sox for which part of the job? If you mean the cutoff point, I can't get a higher cutoff point this way (I need it for some specific bitrates).

Re: CBR AAC Encoder

Reply #52
I don't want to use that low cutoff, this is just for testing): qaac -c 24 -r 22050 --lowpass 2000 sh44m.wav

Code: [Select]
L:\test>qaac64.exe --ignorelength --no-optimize -c 24 -r 22050 --lowpass 2000 "L:\test\Bird.wav"
qaac 2.82, CoreAudioToolbox 7.10.9.0

Bird.m4a
44100Hz -> 22050Hz
AAC-LC Encoder, CBR 24kbps, Quality 96
[100.0%] 0:29.789/0:29.789 (211.3x), ETA 0:00.000
656861/656861 samples processed in 0:00.141
Overall bitrate: 24.0019kbps
X
korth

Re: CBR AAC Encoder

Reply #53
@itisljar You recommend me using sox for which part of the job? If you mean the cutoff point, I can't get a higher cutoff point this way (I need it for some specific bitrates).

I don't understand. You do this:
sox input.wav output.wav lowpass 3300 rate 22050

Afterwards, encode the audio with encoder of your choice.
You can tweak lowpass filter with sinc to get more precise lowpass controls.
TAPE LOADING ERROR

Re: CBR AAC Encoder

Reply #54
I don't want to use that low cutoff, this is just for testing): qaac -c 24 -r 22050 --lowpass 2000 sh44m.wav

Code: [Select]
L:\test>qaac64.exe --ignorelength --no-optimize -c 24 -r 22050 --lowpass 2000 "L:\test\Bird.wav"
qaac 2.82, CoreAudioToolbox 7.10.9.0

Bird.m4a
44100Hz -> 22050Hz
AAC-LC Encoder, CBR 24kbps, Quality 96
[100.0%] 0:29.789/0:29.789 (211.3x), ETA 0:00.000
656861/656861 samples processed in 0:00.141
Overall bitrate: 24.0019kbps
[attach type=image]32551[/attach]
I still can't get a lower cutoff with theses two additional commands, should I use the 64-bit version?

@itisljar You recommend me using sox for which part of the job? If you mean the cutoff point, I can't get a higher cutoff point this way (I need it for some specific bitrates).

I don't understand. You do this:
sox input.wav output.wav lowpass 3300 rate 22050

Afterwards, encode the audio with encoder of your choice.
You can tweak lowpass filter with sinc to get more precise lowpass controls.
I won't be able to get a higher cutoff point with this method, am I wrong?

Re: CBR AAC Encoder

Reply #55
I still can't get a lower cutoff with theses two additional commands, should I use the 64-bit version?
Those were settings already in my script. Shouldn't make a difference.

korth


Re: CBR AAC Encoder

Reply #57
Shouldn't make a difference
korth


Re: CBR AAC Encoder

Reply #59
I won't be able to get a higher cutoff point with this method, am I wrong?

As long as you're below half of needed sampling rate. For 22050 that's 11024. You can cutoff wherever you are.
Later on, encode it.
TAPE LOADING ERROR



Re: CBR AAC Encoder

Reply #62
Test and see. You've gotten a lot of information.
TAPE LOADING ERROR