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#apertus IRC Channel Logs

2019/01/05

Timezone: UTC


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Bertl_oO
off to bed now ... have a good one everyone!
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BAndiT1983|away
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se6astian|away
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Dev2608
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09:51
Dev2608
Hello Bandit1983 :) , I could able to extract headers from MLV (MLVI , RAWI and VIDF) ,
09:52
Dev2608
code for same, https://github.com/shikamaruNARA17/MLV_TIFF (please see main.cpp )
09:53
Dev2608
i could able to print entries which have standard values ,(please see commit in main.cpp)
09:54
Dev2608
i have used endianhelper.h for this ,
09:54
Dev2608
But it is still not giving perfect png , can u please help
09:55
Dev2608
(comments*)
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09:56
se6astian
hi Dev2608
09:57
se6astian
what are the problems when you say "not perfect png" ?
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BAndiT1983|away
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10:00
se6astian
ah perfect, the man of the hour BAndiT1983 :)
10:01
BAndiT1983
hi Dev2608, you can take a look at the OC implementation, regarding the endianess, but i suspect that the data is raw12 or raw14, so probably you have to dissect it first, so you get each sensel into 16 bit type, like uint16_t
10:01
BAndiT1983
hi se6astian, thanks for assistance, am a bit busy elsewhere today, but will try to check logs or getting irc up on my smartphone
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10:09
Dev2608
Hello sebastien , sorry for not being specific , this is the output , https://github.com/shikamaruNARA17/MLV_TIFF/blob/master/MLV.png
10:11
Dev2608
@bandit1983 , so u mean after extracting the framedata , i need to convert it into 16 bit , is that what mean
10:12
Dev2608
how do i check , is it 14 bit ot 12 bit ,
10:13
BAndiT1983
bits sohuld ben oted in the format, can't find the excel table at the moment
10:13
BAndiT1983
yes, you have to convert, as the 12bit data is concatenated as stream, so your values will be totally off
10:14
Dev2608
https://docs.google.com/spreadsheets/d/1ItNuLj34JlK6bZgiAJLrmG7p3iyCmCju4XYyiwjqJOM/edit#gid=0 this one
10:14
Dev2608
?
10:15
BAndiT1983
yep, thanks
10:16
BAndiT1983
let me first find something different, before checking the specs
10:16
BAndiT1983
https://wiki.apertus.org/index.php/RAW12
10:16
BAndiT1983
check the bottom for 12bit explanation
10:19
BAndiT1983
seems like i have used only 14bit for mlv loader -> https://github.com/apertus-open-source-cinema/opencine/blob/master/Source/OCcore/Image/MLVLoader.cpp
10:19
BAndiT1983
Dev2608, try to decode it like that, you can find processing for 14bit in bayerframepreprocessor class
10:23
Dev2608
okay , Did u check main.cpp , is it okay for reading the header , so i am safe for that side atleast !
10:25
Dev2608
i see , so we need to check bits_per_pixel for checking the type of RAW data , it was 14 in this case also , i checked it .
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BAndiT1983
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BAndiT1983|away
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10:43
BAndiT1983
sorry Dev2608, had not much time to check your stuff thoroughly yet
10:44
BAndiT1983
just check how OC does it, no guarantee that it reads everything, as it was a prototype
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Bertl
morning folks!
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Bertl
off for now ... bbl
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Dev2608
No problem , all right
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se6astian
off to bed, good night
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