Messages

@IliasG
To be honest.. Did you built a DNG-File that opens in Resolve with 14Bit Data?
What TIFF-Tags do you want to change, you're not able to?

Edit: I tried to use smaller sizes (720x400px) for generating small sample files. Camera Raw behaves really strange with these data.. https://github.com/chmee/misc/tree/master/%5Braw%5Dsamples (look into the dng-metadata. the colormatrix shows an inf"inite" entry)

regards chmee

https://github.com/chmee/misc/tree/master/%5Bcsharp%5Draw2cdng

Sorry, i'm there..

[*!* NOT FUNCTIONAL*!*]

just to give you some food Here's the link to the app. (win)

*refresh* to 0.91
---
*lol* sorry, compiling while Championsleague-Finals is a bad idea.
0.92 - http://www.dslr-kleinanzeigen.de/Download/raw2cdng.0.92.zip

*!* NOT FUNCTIONAL*!*
(+) you need installed Microsoft .net 4.0 Runtime
(+) converting limited to 5 frames
(+) just for dev/analysing

problems so far:
(*) not enough time to solve, because workin' hard. pokin' around.. tuesday i'm back free on this thing.
(*) 14bit is functional with working image
(*) 16bit shows converting problems - have no time to finish successfully. (but is workable in resolve)
(*) both are not recognised by photoshop/acr, but viewable with fe irfanview. help appreciated (maybe colormatrix)
(*) for investigating on the converting problem try rawdigger, switch between the Sensel-channels.
(*) it looks like an array not NULLED in loop. rewriting the convert-function back to "simple" bitshifting and masking.

@EOSHD
if the IFDs would be changed, it wouldnt be no more a DNG. My Application throws out a CDNG with 14Bit - but they're not readable in Resolve Speedgrade etc pp.. The 16Bit-Files are readable, but not usable

For the devs here. Thats the converting loop: Do you see any Problems in it?

Code Select Expand


// c# code
// source - byte[] - rawstream 14bit
// chunks - int - stripByteCounts
// output -> Dest - byte[]

        public static byte[] to16(byte[] source, int chunks)
        {
            byte[] Dest = new Byte[chunks/14*16];
            UInt32 tt = 0;
           
            // because of bytestream i take 7 Bytes for (odd)RGRG (even)GBGB
            for (var t = 0; t < chunks; t += 7)
            {
                Dest[tt++] = (byte)(source[t] >> 2);
                Dest[tt++] = (byte)((source[t] << 6) | (source[t + 1] >> 2));

                Dest[tt++] = (byte)(((source[t + 1] & 0x3) << 4) | (source[t + 2] >> 4));
                Dest[tt++] = (byte)((source[t + 2] << 4) | (source[t + 3] >> 4));

                Dest[tt++] = (byte)(((source[t + 3] & 0xF) << 2) | (source[t + 4] >> 6));
                Dest[tt++] = (byte)((source[t + 4] << 2) | (source[t + 5] >> 6));

                Dest[tt++] = (byte)(source[t + 5] & 0x3F);
                Dest[tt++] = source[t + 6];
            }
            return Dest;
        }

regards chmee

of course. Right now the quest on 10/12Bit is the right way to get cinemaDNG(@10Bit) straight ooCam. finally, there will be a converter computerside - and the integration/rewriting of the cdng-header is the far smallest problem. I'm just sitting to solve the 16bit converting thang, maybe after that we will have a cdng-converter till we implement the idea into raw2dng. its the experience "we" are doing now.

ah, if someone misses the thread 10/12bit -> http://www.magiclantern.fm/forum/index.php?topic=5601.100

regards chmee

ah. Forgot to say. AFAIK the Preview-Jpg is hardcoded on 14Bit-Transcode. Rename the .dng to .tif and look what the viewer is throwing out. 

Open the DNG-File in a Hex-Editor (recommending HxD).
Search for the BitsPerSample-Tag 0102 - think it will be on Position ~1BC
(there will be two entries, because the thumbnail needs this tag as well)

Code Select Expand

0201 0300 0100 0000 0E00 0000
0102 (or in little-endian 0201) and later on there is 000E (14Bit) -> 0E00. change that.

You find the Whitelevel and blacklevel with the tag-id's C61A and C61D, some bytes after the BitPerSampleTag. Example:

Code Select Expand


1AC6 0400 0100 0000 F807 0000 <-->07F8 = 2040
1DC6 0400 0100 0000 2E2D 0000 <--> 2D2E = 11566

Lower both. For Example Blacklevel to 1000 and Whitelevel to 4000.


mfg chmee

[I figured out, that Resolve and Speedgrade cant handle 14Bit Raw-Frames!]

Hey there.. I'm currently trying to realise a CinemaDNG-Converter. First i thought it would just be an existing xmp-packet inside the dng-frame, but it wasn't. After reading the CinemaDNG-Definition i saw, there are about 35 mandatory tags.

DNG Specification 1.4.0.0 - June 2012 - CinemaDNG Specification 1.1.0.0 - September 2011

The CinemaDNG-File is just a TIFF/PE File (as DNG is also) with these CDNG-Tags. I wrote an App for Win7, building a CDNG-Header with the raw-pictures from the Camera-raw-file. They are 14Bit, isnt it? I figured out, that Resolve and Speedgrade cant handle 14Bit Raw-Frames! Just 8, 10 or 16Bit, maybe 12Bit. So, now i'm sitting on converting these 14bit to 16Bit-Chunks. These CinemaDNG-Sequences are recognised by Resolve and Speedgrade, but they are chaotic because of wrong handling/converting.

If asking, why the simple DNG-Sequences are not usable, it might be that
(+) missing CDNG-Tags
(+) IFD0-Entry is the jpg-Preview in 128x96px 8Bit - thats the one you see in Resolve.
(+) Raw-Data are packed into a subIFD - as in the DNG-Definition described.
(+) they are 14bit.
 
Questions:
(*1) Raw-Data - Subpixel-Chunks, MSB or LSB first? LittleEndian, so LSB first, right?
(*2) is it worth that? Maybe another Fileformat would be more usable? DPX? EXR? TIF?

regards chmee


regarding raw2cdng

i decided to stay on the same name and same tool with integrated mlv-convert (since 1.4.5). Resolve, Speedgrade and all ACR-using-Apps are coping well with the cdng's. With 1.5.0 (coming next) there s a new GUI, and on NAB(07.04.2014) Adobe releases a bigger update promising a better workflow with cdng. 1.5.0 is online. since 1.6.5 audiosync seems stable, colormatrices are refreshed. you find more info on my webblog.

please look in my blog-entry to find the newest version!

bitbucket-sourcecode c# (with 1.5.0beta2 i've left it into the free world)
https://bitbucket.org/chmee/raw2cdng

actual release : raw2cdng 1.6.5 for windows
http://www.magiclantern.fm/forum/index.php?topic=5618.msg136306#msg136306

regards chmee