lclevy / canon_cr3 Goto Github PK

and, in this repo, i can't find the definition for Image.

I want to use this tool to get exif info from cr3 files.

can you wrote down some instructions, thanks

I tried several example files from an R7 camera (firmware version 1.3.0), all using lossless RAW. They all fail here:

Traceback (most recent call last):
  File "/Users/agf/Desktop/canon_cr3/parse_cr3.py", line 379, in <module>
    if TiffIfd.TIFF_CANON_VIGNETTING_CORR2 in ctmd_makernote7.ifd:
                                              ^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'ifd'

Full output is https://gist.github.com/AGFeldman/c484bad40cf1fbe79c6c7ac88c42f836

To download an example file and reproduce:

wget https://aaron.na31.org/EYA_0236.CR3 && python3 parse_cr3.py EYA_0236.CR3

Thanks in advance if you can take a look! As an aside, I'm interested in this tool because I'm interested in automating raw burst extraction (#14 (comment)) although my understanding is that would take more work.

Are you still looking for Canon R8 files?

Recent models (e.g., G7X-III & G5X-II) support high-speed raw bursts which are recorded in a single cr3 file. Is there any support for parsing and extracting these individual frames?

Can you help me on this? It seems like the library should be able to support it, but i don't even know how i should get started

I can extract the hd data as the output, hd00.bin. However, I have no ideal how to analyze and convert the sequential bytes into an array to recover the corresponding data on each sensors of cameras. Any suggestions or even some related articles about that? Thanks~

I have some R3 raw samples.
https://drive.google.com/file/d/1BH2HMqHvjLtVo2S_Nnf8selIOTa_V-5p/view?usp=sharing

Do you still need samples from that camera?

It looks as if exiv2 cannot read the exif info in the raw file data but can read it in the craw format so there must be something new...

Happy to provide all sorts of samples.

I can provide R3 HEIF (or any other R3 outputs) if needed, just let me know what formats you'd like.

Hi,
I've got a sample for a Canon R7 HEIF if you're still looking for one
https://drive.google.com/file/d/1tBMZB5qwwQ_M0k4p_f7WF5z9VgSUaqzR/view?usp=share_link

In your description, each record entry located in the CTMD box has two long values for Record Type (starting at offset 0) and Record Size (starting at 4). For most of the old cameras it is the right assumption, but I found a lot of new cameras (like EOR R3, EOS-1DXmkIII, EOS-R10, EOS-R50, EOS-R6M2, EOS-R7 and EOS-R8) using a different format. For record numbers 7, 8 and 9 these cameras writes [01 01 00 07] instead of [00 00 00 07] etc.
For this reason, I suggest to adopt the format definition and split the first value of long into two values of short, where the Record Type is taken from the second value. The first value will be 'unknown' for me.

I'm not using your software but the great CR3 format specification only, and I'm working on my own implementation. If you have any questions or comments, please let me known.

Regards,
Christoph

Hi,
I have a Canon EOS RP with which I shoot in RAW, and I would like to parse the raw data into a Python usable format.

Using the canon_cr3 lib, I'm not able to parse any data from mdat. Only preview_image (PRVW) returns me the downscaled jpeg image.

from canon_cr3 import Image
from canon_cr3 import CmtdData

image = 'IMG_0023.CR3'
img = Image(image)

print(len(img.preview_image)) # in PRVW
print(len(img.jpeg_image)) # trak1 of mdat
print(len(img.sd_crx_image)) # trak2 of mdat
print(len(img.hd_crx_image)) # trak3 of mdat

result:

92820
0
0
0

Here is a CR3 file taken with my Canon EOS RP: https://drive.google.com/file/d/1a__2VVyz1q2RhwYsGx9b5myo_ebYVfM4/view?usp=sharing

Any help on that would be much appreciated!

Correct structure of CMP1 tag (terminology and structure from internals of CRX decoder). In terms of CRX decoder this CMP1 is essentially image header for encoded image (exists for each image track). Decoder uses CMP1 data to decode image track.

CMP1

Hello!

If you want to take ownership of this package please tell me your PyPI username and implement this.

Thank you!

Hiya!

From what I can gather from the README the only sample you have from the M6II is a RAW burst. If you are still looking for more samples from the camera I can provide them for you. Let me know what you need, if anything.

You have written 'from canon_cr3 import Image'
But I am unable to find it anywhere in the repo