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Now Viewing: WEBM: MD5 mismatch
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shionsan - Group: Member - Total Posts: 28
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WEBM: MD5 mismatch
Posted on: 03/11/19 05:01AM

Found a WEBM that has a different MD5 than gelbooru has.

gelbooru.com/index.php?page=post&s=view&id=4008117

ID: 4008117
MD5: 448769d3d0d4f00a3f1e24b602f2b797 (gelbooru one, taken from thumb URL, can be found with this)
MD5: 0af8b98d9699b45e2f003e2f80d9f52b (actual of the WEBM-file, 0 search results)

gelbooru.com/index.php?pa...ist&tags=id%3a4008117
gelbooru.com/index.php?pa...3d0d4f00a3f1e24b602f2b797
gelbooru.com/index.php?pa...d9699b45e2f003e2f80d9f52b

There might be more.



lozertuser - Group: Administrator - Total Posts: 1632
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Posted on: 03/11/19 01:15PM

If I am not mistaken, that's the md5 of the original file that was uploaded, as it takes time for each video to convert.



shionsan - Group: Member - Total Posts: 28
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Posted on: 03/11/19 08:01PM

Latest webms do not have md5 mismatch, so it seems that the original problem got fixed a long time ago, but this posts mismatch (and others before the fix happened) still exist. Shouldn't that be corrected? Because right now it's MD5 value is kinda useless.



lozertuser - Group: Administrator - Total Posts: 1632
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Posted on: 03/12/19 11:13PM

When a user uploads a valid webm, it isn't converted, as it doesn't need to be. It's already the format we serve. If a user uploads a avi, mpeg, mkv, it'll be converted and the hash will be of the original file. We are preventing the same source video from being converted twice, as it's a waste of time to do that for a duplicate file, which would already exist on the site.



shionsan - Group: Member - Total Posts: 28
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Posted on: 03/13/19 01:13AM

So I misunderstood there. It is indeed a good reason to store original md5, but why keep it as "file's md5"? Non-webm videos seem to be a special case, so why not make a special field or table for original values of converted videos? Because right now, if I have such video, I won't be able to find info about it on site by it's md5, so auto-tagging and sorting won't be applicable for them and that is my concern.

But I suppose keeping videos saved from gelbooru isn't a good idea to begin with. I'll have to rethink that.



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