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Verification of WeChat video signature failed.
The failure of verification of WeChat video signature may be due to incorrect parameters.

If the prompt signature verification fails, first check whether your five parameters are complete. Timestamp, non-center, package, signType, paySign and signType must be MD5. The official demonstration is not MD5, but MD5, which is also a big pit. Of course, when I wrote in python, I used MD5 directly, and I needed six parameters when I signed paySign. The above five parameters, except paySign does not participate in the signature, appId is a capital I, which is a big pit. If this is wrong, the signature is bound to fail.

When signing, all English words must be capitalized so that the format will be correct.