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7th April 2013, 11:26 | #1 | Link |
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Capture from DV-CAM Colorspace confusion (YV12 RGB24)
Hi,
I am digitizing old 8mm/Hi8 and D8 Videos. I am using an old Sony Cam to transfer/digitize the tapes. I am using DVCapture (old tool from Mainconcept) similar to WinDV to save the stream as type2 When I open the file with avisynth and info() it tells me that the colorspace is RGB24. Now my question: I thought old video material is always YV12, why does avisynth tell me it is rgb24? where was the conversion? does this result in any quality loss through "capture"/saving the stream from the camera? Thanks for any insight. |
8th April 2013, 17:12 | #4 | Link | |
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In vdub, load your AVI directly, look at file=>file information it should tell you which VFW DV decoder is currently being used |
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8th April 2013, 18:34 | #5 | Link |
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thanks for the input!
i just checked one file on a different laptop (internal dv decoder (dvsd)) any way to figure which codec is used by winDV or MainConcept DVrecorder? why don't they just transfer the data stream? is that due to using type2 avi? |
8th April 2013, 22:43 | #7 | Link |
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well, this is strange now... (or probably i am just not getting it) xD
i record with winDV on an old XP machine; then i copy over network to new/fast machine; using avisynth and info() it tells me when opening in virtualDub that it is rgb24... (probably having panasonicDV on that machine) Last edited by carlaron; 8th April 2013 at 22:46. |
9th April 2013, 21:12 | #10 | Link | |
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mei will try when I get back home; i am on business trip for a 10 days |
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9th April 2013, 23:37 | #11 | Link | |
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Yes, I know...The point was to identify the decoder. It will usually say which decoder. If it says panasonic and RGB24, then you have your answer avisynth frameserves uncompressed data, so it will never identify the decoder if you feed an avs script, just the pixel format The solution was mentioned above, change your decoder e.g. cedocida (you might have to uninstall your current decoder or use vcswap to manage the VFW codecs) |
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21st April 2013, 10:44 | #13 | Link | |
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Another possibility: what media file filter do you use to input into Avisynth? With YV12 DV input, using DirectShowSource() with default parameters would always produce RGB24 output on my system with Avisynth 2.5.8 (I haven't yet checked what happens with 2.6.0). Cheers, Francois |
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12th May 2013, 14:46 | #14 | Link |
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It has been mentioned already, I as well highly recommend installing Cedocida DV Codec. It outputs whatever you want (there's a config window).
Usually, you would want YV12 or YUY2 with MPEG2 chroma placement (DV stores with it's own chroma placement, something one should not forget about). |
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