ProgrammingPython
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消除<frozen importlib._bootstrap>:228: RuntimeWarning: scipy._lib.messagestream.MessageStream size changed, may indicate binary incompatibility.

问题

在import scipy.stats的时候报警告：

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Python 3.9.12 (main, Apr  5 2022, 06:56:58)
[GCC 7.5.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from scipy.stats import percentileofscore
<frozen importlib._bootstrap>:228: RuntimeWarning: scipy._lib.messagestream.MessageStream size changed, may indicate binary incompatibility. Expected 56 from C header, got 64 from PyObject
>>> exit()

解决

这个的原因之一是pip在升级numpy，scipy的时候(pip install -U numpy scipy)，对旧的package的删除可能不干净的问题。需要多次用uninstall直至无残留：

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ProgrammingMongoDB
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Ubuntu 22.04安装MongoDB 4.2

问题在于Ubuntu 22.04开始移除了libssl1.1的支持。所以需要先安装libssl1.1

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wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.0g-2ubuntu4_amd64.deb
sudo dpkg -i libssl1.1_1.1.

然后将18.04 boinic的source加入source list

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wget -qO - https://www.mongodb.org/static/pgp/server-4.2.asc | sudo apt-key add -
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.2.list

更新apt并安装

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视频压制
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AVS合并视频文件

常用的视频压制软件，如MeGUI、小丸工具箱等都不支持直接合并视频。所以只能通过AVS脚本实现。但直接用工具生成的脚本压制后会有音画不同步问题。这里分享一种网上找到的办法，可以基本保证合并并压制出没有明显瑕疵的视频。
　　基本思路就是音画分别压制，视频部分用MeGUI自带的Avs Script Creator，生成后合并到一个文件里：

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LoadPlugin("E:\MediaTools\MeGUI-2715-32\tools\lsmash\LSMASHSource.dll")
LoadPlugin("E:\MediaTools\MeGUI-2715-32\tools\ffms\ffms2.dll")
A=FFVideoSource("F:\JDownloader\Downloads\A.wmv", fpsnum=30, fpsden=1, threads=1)
B=FFVideoSource("F:\JDownloader\Downloads\B.wmv", fpsnum=30, fpsden=1, threads=1)
C=FFVideoSource("F:\JDownloader\Downloads\C.wmv", fpsnum=30, fpsden=1, threads=1)
D=FFVideoSource("F:\JDownloader\Downloads\D.wmv", fpsnum=30, fpsden=1, threads=1)
A+B+C+D
#deinterlace
#crop

LanczosResize(848,480) # Lanczos (Sharp)
#denoise

音频部分直接用DirectShowSource，并强制帧率，

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A = DirectShowSource("F:\JDownloader\Downloads\A.wmv", fps=30.000, audio=true, convertfps=true)
B = DirectShowSource("F:\JDownloader\Downloads\B.wmv", fps=30.000, audio=true, convertfps=true)
C = DirectShowSource("F:\JDownloader\Downloads\C.wmv", fps=30.000, audio=true, convertfps=true)
D = DirectShowSource("F:\JDownloader\Downloads\D.wmv", fps=30.000, audio=true, convertfps=true)
A+B+C+D

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ProgrammingCuda
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Linux Mint 19安装Cuda 9.2以及cuDNN、NCCL

CUDA

系统升级到了Mint 19需要重新安装配置Cuda，同时升级到Cuda 9.2。Cuda 9.2需要Nvidia的驱动版本至少是396.37，但不幸的是apt仓库里的396版本驱动有问题，安装后无法被内核加载从而导致系统运行在软解状态。因此只好用bin文件安装。步骤如下：

  1. 去官网下载Cuda 9.2的bin安装文件，注意里面自带驱动所以不需要单独安装驱动。

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Linux应用软件
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Linux下Transmission的“UDP Failed to set receive buffer”错误

在Ubuntu 18.04的VPS上运行transmission-daemon报如下错误：

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Jul 06 13:50:43 ubuntu-s-1vcpu-2gb-tor1-01 systemd[1]: Started Transmission BitTorrent Daemon.
Jul 06 13:50:44 ubuntu-s-1vcpu-2gb-tor1-01 transmission-daemon[29663]: [2018-07-06 13:50:44.429] UDP Failed to set receive buffer: requested 4194304, got 425984 (tr-udp.c:84)
Jul 06 13:50:44 ubuntu-s-1vcpu-2gb-tor1-01 transmission-daemon[29663]: [2018-07-06 13:50:44.430] UDP Failed to set send buffer: requested 1048576, got 425984 (tr-udp.c:95)
Jul 06 13:50:44 ubuntu-s-1vcpu-2gb-tor1-01 transmission-daemon[29663]: [2018-07-06 13:50:44.430] UDP Failed to set receive buffer: requested 4194304, got 425984 (tr-udp.c:84)
Jul 06 13:50:44 ubuntu-s-1vcpu-2gb-tor1-01 transmission-daemon[29663]: [2018-07-06 13:50:44.430] UDP Failed to set send buffer: requested 1048576, got 425984 (tr-udp.c:95)

解决方案如下：

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sysctl -w net.core.rmem_max=8388608
sysctl -w net.core.wmem_max=8388608