DRC settings, is the standard good?

[ChAoS Overlord]

DRC settings are set at

max q: 2
min q: 2
rc av: 2000
rc re: 10
r con: 20

these were the standard settings when I installed DivX5, are these good for overall (2-pass) encoding purposes? If not what to change?

Also my keyframe int is 300

[quake74]

Originally posted by ChAoS Overlord
DRC settings are set at

max q: 2
min q: 2
rc av: 2000
rc re: 10
r con: 20

these were the standard settings when I installed DivX5, are these good for overall (2-pass) encoding purposes? If not what to change?

Also my keyframe int is 300

I might be wrong, butI think that the Max Quant should be a 12 not at 2. You nedd max/min quant at 2 if you want to feed the log file to gknot, but when you encode you want them to be different.

quake74

[Acaila]

The keyframe interval is best as 10 times your movie's fps. So for PAL that would be 250, for NTCS that would be 300.

The RC values are not used with 2-pass mode so you can forget about those.

MinQ should stay at 2, MaxQ should be put at 12. You can choose to lower the MaxQ, but you'll be inhibiting the codec's ability to adjust the bitrate to remain accurate to the final filesize.

[ChAoS Overlord]

Thank you quake74 & acaila, that was a very clear answer

[DJ Bobo]

@ Acaila
I don't agree to keep the Max Quantizer @12. I use always 8. It reduces mosquito noise, and has no effect on predictability, all rips came exactly as calculated.

[Nazgul]

Originally posted by bobotns
@ Acaila
I don't agree to keep the Max Quantizer @12. I use always 8. It reduces mosquito noise, and has no effect on predictability, all rips came exactly as calculated.

It'll depend on what bitrate you want and the resolution you want. If you're using a generous bitrate for the resolution and type of video you're encoding, lowering the max quantizer won't cause much problem, mostly because those high quant values wouldn't be getting used much anyway. But if you're trying to be as bitrate-conservative as possible, lower max quant values could force it to use the min quant less often, possibly reducing the overall quality. I recently recorded a 45-minute SVCD to Divx5 with 1-pass quality at 100%(quant 2), at 480x216 after cropping and resizing, the avg. bitrate for the video was less than 940kbps. So unless I'm way off on how two-pass works, if I tried to encode that video with 2-pass mode and a min quant value of 2, and the target bitrate was sufficiently close to 950kbps, I'd rarely if ever be using a quant value other than 2 throughout the encode. Now, if I tried to use something like 400kbps, the max quant value I set becomes much more important.