DRF, bitrate and filesize compromise?

[grumpygamer]

Hello everyone!
I'm a noob and here's my problem: I am encoding a 50 min video with the --grain tuning profile, 2 passes.
I am not resizing the video, just cropping it and setting the AR in the matroska file; the resolution turns out 712x476.
Result is pretty awesome but to keep the DRF low I need to have a bitrate around 2000 which itself gives me a huge file (around 700mb) which is clearly not worth the effort since I could just copy the VOB file at this point.

It would be cool if I could reach a filesize of 350mb (with no audio tracks).

What I'm asking is: are there any tricks like "click that box and some magic will happen" ?

Cheers
- gg

[nm]

Result is pretty awesome but to keep the DRF low I need to have a bitrate around 2000 which itself gives me a huge file (around 700mb) which is clearly not worth the effort since I could just copy the VOB file at this point.

It would be cool if I could reach a filesize of 350mb (with no audio tracks).

Well, have you even tried to halve the bitrate and see what the result looks like compared to your higher-bitrate encode?

If it's not good enough that way, you'd probably need to remove the grain (denoise with one of the AviSynth filters) to make the video more compressible.

[Firebird]

No one use DRF to measure quality nowadays (actually you made me google what it is :P). Use ssim instead (and your eyes, of course). What preset are you using? You want to keep grain, right? Post screenshot or something, maybe there is no need for tune grain.
The thing is, pretty much all "magic" is done by default. So answer for your question is "no".

[grumpygamer]

Well, have you even tried to halve the bitrate and see what the result looks like compared to your higher-bitrate encode?

If it's not good enough that way, you'd probably need to remove the grain (denoise with one of the AviSynth filters) to make the video more compressible.

Looks quite good @ 930bps, and without grain the video looks all blocky.

No one use DRF to measure quality nowadays (actually you made me google what it is :P). Use ssim instead (and your eyes, of course). What preset are you using? You want to keep grain, right? Post screenshot or something, maybe there is no need for tune grain.
The thing is, pretty much all "magic" is done by default. So answer for your question is "no".

I'll have to google ssim, and I'll post a screenie soon

[grumpygamer]

actually I uploaded a clip of the original VOB here -> http://www.mediafire.com/?a8ee5a517c1y586

[Firebird]

Your source is pretty clear, so use tune film.

[Sharktooth]

DRF is meaningless...

[grumpygamer]

Lol I am pretty shocked, by your opinions...
There is an entire community that bases its standards on DRF, and now these allegations from the highest "authorities" comes as a bit of a surprise...

Is there any thread I can read about DRF's "meaninglessness"? :P

[elguaxo]

After we got VAQ and Psy-RD/Trellis things changed a bit. An encode with higher quants can have a better perceived quality compared to an encode at the same bitrate that uses for example --no-psy. :cool:

[nurbs]

And here is the relevant thread concerning x264: http://forum.doom9.org/archive/index.php/t-134854.html

There are even older ones from way back (2001) that say the same thing.

[Dark Shikari]

All tools that claim to measure "DRF" actually (incorrectly) measure frame quantizers, which are completely meaningless in current x264, because x264 does all quantizer adjustments on the macroblock level, not frame level.

[grumpygamer]

WOW, it'll take some time for me to adjust to this... Spent all the time trying to find ways to lower this value, and now it's clear it's nonsensical.
I feel a little bit like the girl in "The Village" that goes out from her land just to find out everything has progressed and she's still living in the past LOL

[Blue_MiSfit]

Yep. You took the red pill. Now go tell your community to start lurking here more. There are surely plenty of other things that they could use a refresher on...

Derek

[Gser]

WOW, it'll take some time for me to adjust to this... Spent all the time trying to find ways to lower this value, and now it's clear it's .
I feel a little bit like the girl in "The Village" that goes out from her land just to find out everything has progressed and she's still living in the past LOL

You are a girl? *STOP THE PRESSES*

[aegisofrime]

What's DRF? I guess my Google skills must be useless because all I get is "Daily Racing Form"

I initially thought it was a typo of "CRF"

[Dark Shikari]

What's DRF? I guess my Google skills must be useless because all I get is "Daily Racing Form"

I initially thought it was a typo of "CRF"It stands for "detail removal factor", which is a stupid and incorrect name for quantizer (probably with the intention of making it sound more relevant than it actually is).