x264 - warning about DPB size

paviko · 7th March 2006, 22:54

Hi!
I'd like to archive my familiy clips for future viewing using x264. I'm compressing 1440x1080 50fps movies at 16 Mbps. I want them to be restricted to level 4.2, which is the highest (or lowest, don't know how to name it) that allows this kind of resolution and frame rate. I'm constantly getting this warning in the comand line console

:
"x264 [warning]: DPB size (18800640) > level limit (13369344)"
How can I change DPB size so it conform to level 4.2 ? I haven't found any option. Compressing 1440x1080 25fps also is giving me this warning.

Thank you for help.

foxyshadis · 7th March 2006, 23:56

I think it means you're using too many reference frames, since the dpb is where those are stored. Try using 5 refs instead of 8 (quick guess?). But I'm no akupenguin, I might be wrong!

shon3i · 8th March 2006, 00:39

Did you convert to YV12 colorspace

foxyshadis · 8th March 2006, 00:59

Yes, shon3i, x264 displays an error message about "Unsupported input format" and will not continue if you use any other colorspace. It's impossible to get any other error.

Oline 61 · 8th March 2006, 04:07

You might try a higher level, or even unrestricted unless you have a specific reason to use 4.2.

paviko · 8th March 2006, 09:39

Thanks for replies.
I'm using 5 B-frame refs. Hmm... strange. I've thought it's still a bit low. Is it safe going lower ? Will try it when I'm at home.

Quote:

You might try a higher level, or even unrestricted unless you have a specific reason to use 4.2.

I want to restrict it to the lowest level, so there is higher chance it will be playable later by harware players. I hope I'll need only to mux/remux the files and not recompress. Level 4.2 is allready very high and probably won't be playable in 2-3 years.

Thank you

7th March 2006, 22:54	#1 \| Link
paviko Registered User Join Date: Mar 2005 Location: Poland Posts: 85	x264 - warning about DPB size Hi! I'd like to archive my familiy clips for future viewing using x264. I'm compressing 1440x1080 50fps movies at 16 Mbps. I want them to be restricted to level 4.2, which is the highest (or lowest, don't know how to name it) that allows this kind of resolution and frame rate. I'm constantly getting this warning in the comand line console : "x264 [warning]: DPB size (18800640) > level limit (13369344)" How can I change DPB size so it conform to level 4.2 ? I haven't found any option. Compressing 1440x1080 25fps also is giving me this warning. Thank you for help. __________________ HDR AGC - enlighten your clips HDVSplit - capture High Definition Video HDVInfo - timestamp your HDV clips

7th March 2006, 23:56	#2 \| Link
foxyshadis Angel of Night Join Date: Nov 2004 Location: Tangled in the silks Posts: 9,549	I think it means you're using too many reference frames, since the dpb is where those are stored. Try using 5 refs instead of 8 (quick guess?). But I'm no akupenguin, I might be wrong!

8th March 2006, 00:39	#3 \| Link
shon3i BluRay Maniac Join Date: Dec 2005 Posts: 2,419	Did you convert to YV12 colorspace

8th March 2006, 00:59	#4 \| Link
foxyshadis Angel of Night Join Date: Nov 2004 Location: Tangled in the silks Posts: 9,549	Yes, shon3i, x264 displays an error message about "Unsupported input format" and will not continue if you use any other colorspace. It's impossible to get any other error.

8th March 2006, 04:07	#5 \| Link
Oline 61 Registered User Join Date: Nov 2005 Posts: 321	You might try a higher level, or even unrestricted unless you have a specific reason to use 4.2.