Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: Mp3 Vs Mpc, Ogg, & Aac (Read 5415 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Mp3 Vs Mpc, Ogg, & Aac

Hi

I thing MP3s created using the "--alt-preset standard" switch are very good quality!

Which switchs for MPC, OGG, & AAC do you need to use to create the same results as the "--alt-preset standard" switch?

Mp3 Vs Mpc, Ogg, & Aac

Reply #1 –
ogg: around -q6,0 and 6,5
sic transit gloria mundi...

Mp3 Vs Mpc, Ogg, & Aac

Reply #3 –
For AAC (Psytel): -normal

Mp3 Vs Mpc, Ogg, & Aac

Reply #4 –
For ogg I'd go with -q 6.25, which gives you nice nominal 200 kbps, which is what aps averages around in most cases and should give you a bit better quality than aps.

dev0
"To understand me, you'll have to swallow a world." Or maybe your words.

Mp3 Vs Mpc, Ogg, & Aac

Reply #5 –
Quote
For ogg I'd go with -q 6.25, which gives you nice nominal 200 kbps, which is what aps averages around in most cases and should give you a bit better quality than aps.

What's aps?

Mp3 Vs Mpc, Ogg, & Aac

Reply #6 –
Quote
What's aps?

--alt-preset standard.

Mp3 Vs Mpc, Ogg, & Aac

Reply #7 –
oh    cant believe i didnt c that

Mp3 Vs Mpc, Ogg, & Aac

Reply #8 –
The word transcoding has been mentioned quite a few times in this forum!  What is it?

Is it when you convert high quality file to lower quality
Is it when you convert one lossy format to another
or am I barking up the wrong tree?

Mp3 Vs Mpc, Ogg, & Aac

Reply #9 –
I believe transcoding is just re-encoding something that has previously been encoded.

Mp3 Vs Mpc, Ogg, & Aac

Reply #10 –
Quote
I believe transcoding is just re-encoding something that has previously been encoded.

From one format to another.

Mp3 Vs Mpc, Ogg, & Aac

Reply #11 –
So if I did this

mp3 --> wav --> ogg

is that transcoding

or is transcoding straight from

mp3 --> ogg

?

Mp3 Vs Mpc, Ogg, & Aac

Reply #12 –
Quote
So if I did this

mp3 --> wav --> ogg

is that transcoding

or is transcoding straight from

mp3 --> ogg

?

They are both transcoding..

Mp3 Vs Mpc, Ogg, & Aac

Reply #13 –
Quote
So if I did this

mp3 --> wav --> ogg

is that transcoding

or is transcoding straight from

mp3 --> ogg

?

I pretty sure "wav" isn’t a coded file, [trans][coding] means changing from one coded file to another.

Mp3 Vs Mpc, Ogg, & Aac

Reply #14 –
The wav is the result of an already decreased in sound quality source, since it comes from mp3...encoding that to ogg will lower the quality even more. Westgroveg might be typically right about the term transcoding and if it applies correctly here, but the important thing is that the concluded sound quality will be the same regardless if you choose to go straight from mp3 to ogg, or use wav as an inbetween step.

Mp3 Vs Mpc, Ogg, & Aac

Reply #15 –
Thanx for the help guys 

Mp3 Vs Mpc, Ogg, & Aac

Reply #16 –
Quote
mp3 --> wav --> ogg

is that transcoding

or is transcoding straight from

mp3 --> ogg


This representation confuses things. In reality, it's more like:

mp3/mp3 -> pcm/wav -> vorbis/ogg

and

mp3/mp3 -> pcm/RAM -> vorbis/ogg

It's clearer now that they are both the same thing.

Mp3 Vs Mpc, Ogg, & Aac

Reply #17 –
Quote
Quote
I believe transcoding is just re-encoding something that has previously been encoded.

From one format to another.

Can't you "transcode" to the same format? Otherwise, if you did it (to lower the bitrate for example) what would you call the operation... "ciscode"?

This is different from bitrate peeling... which doesn't generate the pcm/wav to do the job and therefore works better. (ogg will eventually support this I think).

Mp3 Vs Mpc, Ogg, & Aac

Reply #18 –
Quote
Quote
Quote
I believe transcoding is just re-encoding something that has previously been encoded.

From one format to another.

Can't you "transcode" to the same format? Otherwise, if you did it (to lower the bitrate for example) what would you call the operation... "ciscode"?

This is different from bitrate peeling... which doesn't generate the pcm/wav to do the job and therefore works better. (ogg will eventually support this I think).

Re-encode. The word trans is like cross so I would think transcoding=crosscoding if that makes it easier  .

Mp3 Vs Mpc, Ogg, & Aac

Reply #19 –
Quote
Re-encode. The word trans is like cross so I would think transcoding=crosscoding if that makes it easier  .

Re-encoding: pcm/CD->pcm/RAM->mp3/mp3
Transcoding: mp3/mp3->pcm/RAM->vorbis/ogg or mp3/mp3->pcm/wav->vorbis/ogg

Ciscoding(?): mp3/mp3->pcm/RAM->mp3/mp3(lower bitrate and much lower quality)
shday: Nice idea, but you will lose as much as by transcoding because the transform is applied twice.

Mp3 Vs Mpc, Ogg, & Aac

Reply #20 –
Quote
Re-encoding: pcm/CD->pcm/RAM->mp3/mp3

This is getting dumber by the minute but one last hit, how can: Re(2)-encoding=pcm/CD->pcm/RAM->mp3/mp3 if the code is only applied once?
I think:
Re-encode=multiple encodes of one code. e.g. mp3=decode=mp3

Transcoding=encoding from one code to another e.g mp3=decode=ogg

Ciscoding???.

Mp3 Vs Mpc, Ogg, & Aac

Reply #21 –
Quote
Quote
Re-encoding: pcm/CD->pcm/RAM->mp3/mp3

This is getting dumber by the minute but one last hit, how can: Re(2)-encoding=pcm/CD->pcm/RAM->mp3/mp3 if the code is only applied once?

I think what he means is that "re-encoding" is usually used about encoding again from the original source, with different parameters...

Mp3 Vs Mpc, Ogg, & Aac

Reply #22 –
Quote
I think:
Re-encode=multiple encodes of one code. e.g. mp3=decode=mp3

You obviously need to do a search on re-encoding vs transcoding. But qristus got it right, as well as shday elaborated on an interesting subject "ciscoding". Is this "ciscoding" commonly done by internet radio stations or..? Just wondering if they have a name for it.

[span style='font-size:8pt;line-height:100%']Edit: s/westgroveg/shday/[/span]