TMPGEnc x CCE

[jwedge]

I'm playing with CCE trial x TMPGEnc and find files of equivalent quality encoded with CCE to be smaller. Should I expect that? It's clear the CCE is faster and with more passes picture quality should be better but why is the file size smaller?

Thanks for your feedback.

[adam]

Size is determined solely by bitrate. If the sizes are different than you must have CCE's bitrate set lower than in TMPGenc.

[Cecilio]

Size is determined solely by bitrate. If the sizes are different than you must have CCE's bitrate set lower than in TMPGenc.

maybe that, or it could just be that you were supplying sufficient bitrate for the clip you were encoding using CCE. Did you have TMPGENC set as CBR or also 2 pass VBR?

[jwedge]

Just realized I have TMPGEnc set for VBR 2 passes and CCE 3 passes...that should explain it, right?

[adam]

Doesn't explain the filesize difference, no. Filesize is determined soley by the average bitrate. Regardless of what encoder you use, regardless of how many passes you use, x amount of minutes encoded at y bitrate will always yield the exact same filesize. Its math.

Cecilio, I don't understand your post.

[Cecilio]

adam what i meant by that, was maybe tmpgenc was set as cbr, while cce was set as vbr. then some videos can be very low bitrate consumers, such as alot of black screens. oh well i couldn't explain myself im sorry

[thor300]

It COULD be as simple as having sound in the tmpgenc file? CCE will always output audio and video to separate files. 2 vs 3 passes will not change the filesize.

[petar]

jwedge, how much smaller is the CCE output? The encoders aren't that precise. If we're talking couple of megs over a video that's couple of gigs in size, I wouldn't make a big deal out of it.

[jwedge]

Video file sizes are as follows;

TMPGEnc 7849kb x CCE 2757kb

But I think the issue is related to avrg bit rate I had TMPGEnc at 6000 and CCE at 4500...I'm learning more and more with this forum posts.

Thank you all!!!!

[Skynet107]

You are confusing actuall bitrate with the bitrate you put in your settings. They don't always come out to the exact same figure. For example, if you set CCE to do say 4800 VBR 3 pass the final output may actually be 4680 average. CCE tends to encode with a bitrate slightly less than set. TMPGEnc seems to encode with a higher bitrate than you had in settings.

Variable bit rate encoding is a highly volatile equation so it's no surprise if different encoders give different file sizes at the exact same bit rate settings.

[adam]

I have to disagree. Things like min and max bitrate settings will stray in your output, though I can't say it has ever happened to me in CCE. But avg bitrate never strays in multipass encoding by any more than a negligle amount. Multipass encoding starts with a CBR pass, and then in subsequent passes it just moves the bitrate curve. It takes away x here and adds x there etc... but since its still the same curve the avg bitrate never changes. If you use the same avg in CCE and TMPGenc then the output sizes should be within a couple MB's of each other.

He just set his avg bitrates to two different numbers, that's all.