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MediaArea / RAWcooked

Encodes RAW audio-visual data into the Matroska container (MKV), using the video codec FFV1 for the image and audio codec FLAC for the sound.
https://mediaarea.net/RAWcooked
BSD 2-Clause "Simplified" License
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Warning: non-conforming DPX total image file size #434

Closed Lawrence58 closed 6 months ago

Lawrence58 commented 6 months ago

I am trying to troubleshoot something. I have a set of DPX sequences from a film scanning vendor. When I rawcooked them I get a warning. This is what it looks like for one of the sequences. The hex value changes with each sequence. Warning: non-conforming DPX total image file size (x17373). At least 1 file is not conform to specifications.

Is the hex number the file size of the offending file or something else? I have checked the file size of some of the DPX files in the sequence referenced above but none of them are close to that. Can you explain this situation to me please? Thx.

JeromeMartinez commented 6 months ago

The hex value changes with each sequence.

No, it is a multiplier (x, not 0x) for the count of instances of the issue, looks like I need to find a better and more explicit way to display that. Here it happens in 17373 files.

Can you explain this situation to me please?

The DPX header has a total image file size field e.g.:

0000000 Generic section header (1664 bytes)
0000000  File information (768 bytes)
0000000   Magic number:                         SDPX
0000004   Offset to image data:                 8192 (0x00002000)
0000008   Version number of header format:      V2.0
0000010   Total image file size:                18153472 (0x01150000)
[...]

(I used "mediainfo --Details=1 FileName.dpx)"

And we check that the value of this field matches the actual file size. Could you check that this is the case? If this is the case, please share a sample file so we can see why the warning is displayed.

Lawrence58 commented 6 months ago

MediaInfo MediaInfoCLI_SDAM

MacOS

27297_Graded_MacOS
Lawrence58 commented 6 months ago

Thanks. That explains it. And, the number of occurrences 17373 matches the number of files in the sequence.

JeromeMartinez commented 6 months ago

So the DPX file is not conforming to the specs, and RAWcooked does its job by warning you about that. Depending on other file characteristic, it may be just the tool which is buggy by "forgetting" 4 KiB or maybe there is an extra (non conforming) content after the file not part of the DPX content.

You can disable the conformance checker if you prefer, with --no-conch.