Uncompressed UYVY into AVISource without conversion to RGB?

ChiDragon · 27th July 2015, 20:12

Info() shows that it's being converted to RGB32. How can I make it use YUY2 or YV24 instead?

I could swear I had this working before on a different PC. I've tried setting VIDC.UYVY=huffyuv.dll in the registry, both 64-bit & 32-bit, as I thought that was the fix previously. No change.

I've read that one solution is to setup ffdshow to decode "Raw Formats" in VFW, but I'd rather not do that if I can avoid it.

[Using Win7 x64.]

LoRd_MuldeR · 27th July 2015, 21:50

Maybe RawSource() can help out?
http://avisynth.org.ru/docs/english/.../rawsource.htm

ChiDragon · 27th July 2015, 22:57

The settings required ("offset" for that version and "index" for newer versions) are over my head.

FFVideoSource is a reasonable workaround, but the indexing time is pretty bad for big captures.

wonkey_monkey · 28th July 2015, 23:23

What about:

Code:

avisrouce("file.avi", pixel_type="YUY2")

I may be wrong about this.

ChiDragon · 29th July 2015, 22:28

The default value of pixel_type is such that it would choose YUY2 if the decoder offered that as an option. When forced, it simply complains that "the video decompressor couldn't produce YUY2 output."

Googling that error message finds surprisingly few results. One of them is this German Doom9 thread in which Ligh suggests that ffdshow solution I'd mentioned.

wonkey_monkey · 29th July 2015, 23:26

Ah. I must have only used it the other way, then, to force RGB instead of YUV out of a misbehaving codec.

27th July 2015, 20:12	#1 \| Link
ChiDragon Registered User Join Date: Sep 2005 Location: Vancouver Posts: 600	Uncompressed UYVY into AVISource without conversion to RGB? Info() shows that it's being converted to RGB32. How can I make it use YUY2 or YV24 instead? I could swear I had this working before on a different PC. I've tried setting VIDC.UYVY=huffyuv.dll in the registry, both 64-bit & 32-bit, as I thought that was the fix previously. No change. I've read that one solution is to setup ffdshow to decode "Raw Formats" in VFW, but I'd rather not do that if I can avoid it. [Using Win7 x64.]

27th July 2015, 21:50	#2 \| Link
LoRd_MuldeR Software Developer Join Date: Jun 2005 Location: Last House on Slunk Street Posts: 13,248	Maybe RawSource() can help out? http://avisynth.org.ru/docs/english/.../rawsource.htm __________________ Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊

28th July 2015, 23:23	#4 \| Link
wonkey_monkey Formerly davidh***** Join Date: Jan 2004 Posts: 2,496	What about: Code: avisrouce("file.avi", pixel_type="YUY2") I may be wrong about this. __________________ My AviSynth filters / I'm the Doctor

29th July 2015, 23:26	#6 \| Link
wonkey_monkey Formerly davidh***** Join Date: Jan 2004 Posts: 2,496	Ah. I must have only used it the other way, then, to force RGB instead of YUV out of a misbehaving codec. __________________ My AviSynth filters / I'm the Doctor

27th July 2015, 22:57	#3 \| Link
ChiDragon Registered User Join Date: Sep 2005 Location: Vancouver Posts: 600	The settings required ("offset" for that version and "index" for newer versions) are over my head. FFVideoSource is a reasonable workaround, but the indexing time is pretty bad for big captures.

29th July 2015, 22:28	#5 \| Link
ChiDragon Registered User Join Date: Sep 2005 Location: Vancouver Posts: 600	The default value of pixel_type is such that it would choose YUY2 if the decoder offered that as an option. When forced, it simply complains that "the video decompressor couldn't produce YUY2 output." Googling that error message finds surprisingly few results. One of them is this German Doom9 thread in which Ligh suggests that ffdshow solution I'd mentioned.