Level 4.1

[Nikos]

What's the right values for
--vbv-bufsize
--vbv-maxrate
to conform level 4.1.

I know only according to akupenguin:
If you set vbv-maxrate and vbv-bufsize to some non zero values, then it restricts the average bitrate of a certain number of frames (the number being however can fit in your specified vbv-bufsize (which is specified in kbit)).
If vbv-maxrate=bitrate, then it's CBR; otherwise it just restricts the peak bitrate.

The H.264 standard calls it "HRD" (VBV). Theoretically, vbv-maxrate is the rate at which the decoder can read from the medium (DVD, network, etc) and vbv-bufsize is the amount of memory it has available to pre-buffer the incoming stream.

:thanks:

[bob0r]

From the megui HD-DVD profile:

--pass 2 --bitrate 8000 --stats ".stats" --level 4.1 --keyint 14 --min-keyint 2 --ref 3 --mixed-refs --bframes 2 --b-rdo --bime --weightb --direct auto --filter -2,-1 --subme 6 --analyse p8x8,b8x8,i4x4,i8x8 --8x8dct --ipratio 1.1 --pbratio 1.1 --vbv-bufsize 14475 --vbv-maxrate 25000 --qcomp 0.5 --me umh --threads auto --thread-input --progress --no-psnr --no-ssim --output "output" "input" --mvrange 511 --aud --nal-hrd

Thus: --vbv-bufsize 14475 --vbv-maxrate 25000

[lexor]

according to this post (http://forum.doom9.org/showpost.php?p=1091845&postcount=25) in this thread (http://forum.doom9.org/showthread.php?t=133925) --vbv-bufsize 9000 is needed for stand alone compatibility.

[Nikos]

1. With --vbv-bufsize 9000 and --vbv-maxrate 24000 (PD-PS3-Xbox360 profile) is there any quality decrease for 720p.

2. The --vbv-maxrate requires the --vbv-bufsize setting or not ?
What happen if i set only the --vbv-maxrate 24000 and leave the --vbv-bufsize blank.

3. In PD-PS3-Xbox360 profile i noticed --ipratio 1.1, --pbratio 1.1 and --qcomp 0.5. The default values are 1.4, 1.3 and 0.6 respective. Any axplain?

[froggy1]

1. With --vbv-bufsize 9000 and --vbv-maxrate 24000 (PD-PS3-Xbox360 profile) is there any quality decrease for 720p.

No.

2. The --vbv-maxrate requires the --vbv-bufsize setting or not ?
What happen if i set only the --vbv-maxrate 24000 and leave the --vbv-bufsize blank.

--vbv-maxrate requires --vbv-bufsize

3. In PD-PS3-Xbox360 profile i noticed --ipratio 1.1, --pbratio 1.1 and --qcomp 0.5. The default values are 1.4, 1.3 and 0.6 respective. Any axplain?

Those are some tweaks, nothing to worry about

[XolocoTuxmaster]

Do you want 4.1 for PS3/BD? If so, level is not enough

http://forum.doom9.org/showthread.php?t=134402

[shon3i]

From Elecard BluRay HD profile, VBV bufer is 29999616 in bits.

[Nikos]

Thanks XolocoTuxmaster for the info!!!