all alpha was set to 0

DDogg · 1st April 2004, 19:43

Sh0dan, Satish is adding AVS read capability to Vegas via his wax2 plugin. He was using Editing.avs as a test script, encountered a few problems, and IM'ed me -

"avisynth was saying AVI format was 32bits but all alpha was set to 0
and Wax was showing it as fully transparent"

I think he worked around it, but when I started checking a little and opened a similar script in TMPG using ConvertToRGB(), the encode was all black. That was remedied with a converttorgb24(). As I don't use TMPG I not really sure if it can read rgb32 and I don't know if these two things are related, but I thought mentioning it to you was the correct thing to do.

Wilbert · 1st April 2004, 20:57

Quote:

"avisynth was saying AVI format was 32bits but all alpha was set to 0
and Wax was showing it as fully transparent"

I'm sure Sh0dan will react on this

Quote:

I think he worked around it, but when I started checking a little and opened a similar script in TMPG using ConvertToRGB(), the encode was all black. That was remedied with a converttorgb24(). As I don't use TMPG I not really sure if it can read rgb32 and I don't know if these two things are related, but I thought mentioning it to you was the correct thing to do.

ConvertToRGB converts to RGB32 (unless clip is RGB24). And yes, TMPGEnc needs RGB24. I guess some buggy codec was converting it for you.

DDogg · 1st April 2004, 23:54

Thanks, Wilbert, the few time I need TMPG, I normally let huffy handle it for me as I always make the registry change [vidc.yuy2=huffyuv.dll and use converttoyuy2()].

This came about today when I noticed a problem in dvd2vcd when "Convert to RGB 24" is used in the advanced settings. For some reason D2S is using ConvertToRGB() which causes problems. I reported it so maybe it will be changed. I wish tmpg would just barf, instead of encoding black. hmm, or were you saying it should have barfed except some codec on my machine was attempting (badly) a translation?

Richard Berg · 2nd April 2004, 07:02

Can you post the script? With ColorBars there is definitely 0xFF in the memory buffers, ditto any simple Avisource.ConvertToRGB32.

DDogg · 2nd April 2004, 14:26

Richard, Satish was using the Editing.avs from the example files.

In case your question was directed to the tmpg commnets:

MPEG2Source("D:\sg1\DVD2AV~1.D2V")
undot()
BicubicResize(352,180,0.0,0.6)
AddBorders(0,30,0,30)
ConvertToRGB()

sh0dan · 2nd April 2004, 14:37

Alpha behaviour is undefined for most filters, and will therefore produce unexpected results in many cases. This is why I try eliminating it as much as possible, since it's usually very unreliable (just as vdub btw).

Use ResetMask() if you want to fix it.

I don't have any plans on upgrading alpha support.

DDogg · 2nd April 2004, 15:08

Quote:

I don't have any plans on upgrading alpha support.

ok, thanks. I think that should be helpful as he will know his workarounds will continue to function in the future.

1st April 2004, 19:43	#1 \| Link
DDogg Retired, but still around Join Date: Oct 2001 Location: Lone Star Posts: 3,058	all alpha was set to 0 Sh0dan, Satish is adding AVS read capability to Vegas via his wax2 plugin. He was using Editing.avs as a test script, encountered a few problems, and IM'ed me - "avisynth was saying AVI format was 32bits but all alpha was set to 0 and Wax was showing it as fully transparent" I think he worked around it, but when I started checking a little and opened a similar script in TMPG using ConvertToRGB(), the encode was all black. That was remedied with a converttorgb24(). As I don't use TMPG I not really sure if it can read rgb32 and I don't know if these two things are related, but I thought mentioning it to you was the correct thing to do. __________________ How to Optimize Bitrate for CCE multipass

1st April 2004, 23:54	#3 \| Link
DDogg Retired, but still around Join Date: Oct 2001 Location: Lone Star Posts: 3,058	Thanks, Wilbert, the few time I need TMPG, I normally let huffy handle it for me as I always make the registry change [vidc.yuy2=huffyuv.dll and use converttoyuy2()]. This came about today when I noticed a problem in dvd2vcd when "Convert to RGB 24" is used in the advanced settings. For some reason D2S is using ConvertToRGB() which causes problems. I reported it so maybe it will be changed. I wish tmpg would just barf, instead of encoding black. hmm, or were you saying it should have barfed except some codec on my machine was attempting (badly) a translation? __________________ How to Optimize Bitrate for CCE multipass Last edited by DDogg; 2nd April 2004 at 14:57.

2nd April 2004, 14:26	#5 \| Link
DDogg Retired, but still around Join Date: Oct 2001 Location: Lone Star Posts: 3,058	Richard, Satish was using the Editing.avs from the example files. In case your question was directed to the tmpg commnets: MPEG2Source("D:\sg1\DVD2AV~1.D2V") undot() BicubicResize(352,180,0.0,0.6) AddBorders(0,30,0,30) ConvertToRGB() __________________ How to Optimize Bitrate for CCE multipass Last edited by DDogg; 2nd April 2004 at 14:28.

2nd April 2004, 14:37	#6 \| Link
sh0dan Retired AviSynth Dev ;) Join Date: Nov 2001 Location: Dark Side of the Moon Posts: 3,480	Alpha behaviour is undefined for most filters, and will therefore produce unexpected results in many cases. This is why I try eliminating it as much as possible, since it's usually very unreliable (just as vdub btw). Use ResetMask() if you want to fix it. I don't have any plans on upgrading alpha support. __________________ Regards, sh0dan // VoxPod

2nd April 2004, 07:02	#4 \| Link
Richard Berg developer wannabe Join Date: Nov 2001 Location: Brooklyn, NY Posts: 1,211	Can you post the script? With ColorBars there is definitely 0xFF in the memory buffers, ditto any simple Avisource.ConvertToRGB32.