AVC Decoding via FFDSHOW Postprocessing Help

fight2win · 18th February 2006, 12:02

i have a small question, when decoding x264 encoded avc video via ffdshow, what postprocessing settings should i use, or should i turn off postprocessing in ffdshow?

Sharktooth · 18th February 2006, 12:06

none. AVC has inloop deblocking and doesnt need post processing.

Daodan · 18th February 2006, 13:06

Than how do you explain that recoding a h264 source (to xvid for example) using constant quantizer, I get much smaller size (about 20%) if I put maximum postprocessing compared to no postprocessing? (and the source was very good quality by the way).

Sharktooth · 18th February 2006, 13:10

coz postprocessing blurs the image and remove details (and we dont want that) thus rising the compressibility... while loop deblocking is applied only where the encoder chosen to apply it.

Audionut · 18th February 2006, 13:12

Because the max postprocessing will be blurring the h264 source.

Hence better compressability.

edit: Sharktooth beat me.

Daodan · 18th February 2006, 17:04

Well, I understood that. I just missunderstood Sharktooth's reply for "don't use postprocessing because it doesn't do anything", instead of "it will just make things worse". All clearer now.

Sharktooth · 18th February 2006, 17:08

well, i didnt say "it doesnt do anything". i said it's not needed...

gino25 · 19th February 2006, 14:39

i have a little question about ffdshow, but i don't want to open a new discussion.

So.....

where can i get a recent ffdshow build? The latest that i finded is 12 dec 2005....

Thank you very much

Sharktooth · 19th February 2006, 15:17

http://www.free-codecs.com/download/FFDShow.htm

DigitalDivide · 19th February 2006, 19:21

Quote:

Originally Posted by Sharktooth

http://www.free-codecs.com/download/FFDShow.htm

Just curious which version should I be using, the one above or this one? I'm never sure where to go to get the latest one for x264 playback.
http://ffdshow.sourceforge.net/tikiw...etting+ffdshow

gino25 · 20th February 2006, 17:26

Quote:

Originally Posted by Sharktooth

http://www.free-codecs.com/download/FFDShow.htm

thank you shark!!!!!

Rimettiti presto mi raccomando!

18th February 2006, 12:02	#1 \| Link
fight2win What's in a name dude ! Join Date: Sep 2005 Location: Cloud 9 Posts: 331	AVC Decoding via FFDSHOW Postprocessing Help i have a small question, when decoding x264 encoded avc video via ffdshow, what postprocessing settings should i use, or should i turn off postprocessing in ffdshow?

18th February 2006, 12:06	#2 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 11,768	none. AVC has inloop deblocking and doesnt need post processing. __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!

18th February 2006, 13:06	#3 \| Link
Daodan unrecognized user Join Date: Oct 2005 Location: home of Stella Artois Posts: 303	Than how do you explain that recoding a h264 source (to xvid for example) using constant quantizer, I get much smaller size (about 20%) if I put maximum postprocessing compared to no postprocessing? (and the source was very good quality by the way). __________________ zzz

18th February 2006, 13:10	#4 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 11,768	coz postprocessing blurs the image and remove details (and we dont want that) thus rising the compressibility... while loop deblocking is applied only where the encoder chosen to apply it. __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!

18th February 2006, 13:12	#5 \| Link
Audionut Registered User Join Date: Nov 2003 Posts: 1,256	Because the max postprocessing will be blurring the h264 source. Hence better compressability. edit: Sharktooth beat me. __________________ http://www.7-zip.org/

18th February 2006, 17:04	#6 \| Link
Daodan unrecognized user Join Date: Oct 2005 Location: home of Stella Artois Posts: 303	Well, I understood that. I just missunderstood Sharktooth's reply for "don't use postprocessing because it doesn't do anything", instead of "it will just make things worse". All clearer now. __________________ zzz

18th February 2006, 17:08	#7 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 11,768	well, i didnt say "it doesnt do anything". i said it's not needed... __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!

19th February 2006, 14:39	#8 \| Link
gino25 Registered User Join Date: Dec 2002 Posts: 165	i have a little question about ffdshow, but i don't want to open a new discussion. So..... where can i get a recent ffdshow build? The latest that i finded is 12 dec 2005.... Thank you very much

19th February 2006, 15:17	#9 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 11,768	http://www.free-codecs.com/download/FFDShow.htm __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!