VBR versus CBR

[SIG]

Am vazut pe internet mai multe dezbateri vizavi de modul cum alegem sa encodeze,dpdv al controlului cantitativ/calitativ:

Constant bit rate (CBR) sau Variable bit rate (VBR)?

Aici am gasit o explicatie + un calculator care ne ajuta sa alegem CBR sau BCR si sa setam restul parametrilor:

Printre altele spune asa:

Normally, the calculator will suggest 2-pass VBR (if your encoder doesn't support 2-pass VBR, use a supported VBR mode that allows you to define the minimum, average and maximum bitrates). It will suggest CBR in two circumstances:

First, when you select Force CBR in the first section of the calculator.

Second, when there is enough space on the disc to make the average bitrate equal to or greater than the maximum bitrate. In this case, a VBR file would effectively be CBR, therefore it makes no sense to use the VBR mode (which takes longer to encode). If the calculator suggests VBR with an average bitrate value that is very close (i.e., within 10%) of the maximum bitrate value, you can greatly reduce the encoding time (with a very small loss in quality) by selecting CBR mode.

[adry]

Eu folosesc CBR de cele mai multe ori, dar si VBR la clipurile mai lungi (pe care eu il aleg pe fragmente).