Messages

Some other reasons, we're starting to know. Well, maybe just a1ex is starting to know:

out of my knowledge range.

i have play with 14 bit~lossess for somedays.i found something interesting.
i opened dng files come form mlv_dump with dcraw then repaired black level in matlab just like
this.

Code Select Expand


dcraw = 'dcraw -c -4 -D';
system(sprintf('%s "%s" > tmp.pgm', dcraw, filename));
a = double(imread('tmp.pgm'));
[m,n]=size(a);
for i=1:2:m
for j=1:2:n
    out(i,j)=a(i,j)+128;
    out(i,j+1)=a(i,j+1)+256;
    out(1+i,j)=a(1+i,j)+512;
    out(i+1,j+1)=a(i+1,j+1)+1024;

then i did demosaicking in matlab with the demosaic function and output tiff file.
the output image looks very dark.after add on five levels of exposure it looks well.however, i found this way give me lots of noise.
it's strange since i take the photo with a low iso(400) it shouldn't give so many noise.so i did some more research.
i took two mlvs.one is over exposured(+5e) and the other one is totally dark(-10.5).take dngs from them and repair black-level in matlab.for over exposured,max figure is 16382 and for dark image,the average is 2047 and min is 2038.then,for the 0ev image, average is 2150,max 16124, min 2059.
so..it means almost all -10.5~0ev pixels' data were written within 8bit.(2150-2047)*2=206.
i have no idea if highlight data use the range of 2^14-2^7 ,but it seems impossable.
so...maybe for some reasons 6d record wrong data or mlv_dump can't change 14bit~lossess mlv from 6d to dng currectlly...or...for some other reasons.who knows.

sorry for my poor english. 

But to record MLV's with audio, you must download the 4 februari build from Dfort.

thanks a lot.it seems i have a wrong understanding of these modules.i thought if don't active them together will have no conflision.
my mlv_snd comes from the test version on fer 20th and shows a tab in the ML main memu,not in the mlv(lite).

Not at all like the examples you previously posted.

thanks you for pointing out my mistake.this mlv is recorded in 14bit lossless mode(in my memory).the screenshot i posted before are dngs haven fix black level with exiftool.
i will upload more mlv files for test.however,before that,i have to make a struggle to register my google drive since i am in China

Upload a short MLV with audio so we can examine it.

https://pan.baidu.com/s/1qZhil9U
mlv_dump said it hasn't content audio.
I'm not sure if you kan open this link ,if you can't,maybe i can Email it to you.
thanks a lot.

so...how can you get the audio?mlv_dump only give me dngs by

Code Select Expand

mlv_dump file.MLV --dng --no-stripes --no-fixcp
I have loaded mlv_snd.mo and keep it on.

I'm come from China and say sorry for my poor English

I have tried dump the 14bit-lossless RAW video with mlv_dump and repair DNGs with exiftool.For every single dng i got a nice image with wrong white balance(alaways on 3200K).


that is ok,good job.However,when I put them into Premiere and DaVinci,the color is borken.it looks like dng without exiftool but have a little higher blacklevel.


I can always get right image with the help of software with ACR like PS,LR and AE,but,you know,it's a trouble.
By the way.I have write a windows form app for dump DNGs.Of course,have the problem I said above.
https://pan.baidu.com/s/1smB7YLf
(I'm not sure if you can open the netdisk link without a VPN  )