马春杰杰
文件权限中的@什么意思？
比如这样： 这其实是文件的扩展属性，包含了一些额外的信息，比如这个文件是不是从网上下下来的。 可以使用命令：xattr -l name来查看这些额外的属性，比如这个：
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xattr -l 1584759074404374.mp4 com.apple.quarantine: 0082;5e758125;WeChat; |
从上面 […]
The Matroska muxer does not yet support muxing cook
在使用FFmpeg进行视频合并的时候报错：
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ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers built with Apple clang version 12.0.0 (clang-1200.0.32.29) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox libavutil 56. 70.100 / 56. 70.100 libavcodec 58.134.100 / 58.134.100 libavformat 58. 76.100 / 58. 76.100 libavdevice 58. 13.100 / 58. 13.100 libavfilter 7.110.100 / 7.110.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 9.100 / 5. 9.100 libswresample 3. 9.100 / 3. 9.100 libpostproc 55. 9.100 / 55. 9.100 [rm @ 0x7f8b03018000] Invalid stream index 2 for index at pos 83519036 Input #0, concat, from '1.txt': Duration: N/A, start: 0.000000, bitrate: 225 kb/s Stream #0:0: Video: rv40 (RV40 / 0x30345652), yuv420p, 352x288, 180 kb/s, 25 fps, 25 tbr, 1k tbn, 1k tbc Stream #0:1: Audio: cook (cook / 0x6B6F6F63), 44100 Hz, stereo, fltp, 44 kb/s [matroska @ 0x7f8b02847c00] The Matroska muxer does not yet support muxing cook Could not write header for output file #0 (incorrect codec parameters ?): Not yet implemented in FFmpeg, patches welcome Error initializing output stream 0:1 -- Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Last message repeated 1 times |
解决方法： 两种，一种是将mkv改为rm 第二种是-c改为-c:v 推荐第二种
如何使用FFmpeg拼接视频？
或者说如何使用FFmpeg合并视频？ 首先，建立txt文件，把要合并的视频列表放进去，格式如下：
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file 1.flv file 2.flv file 3.flv |
然后在当前目录打开终端，然后输入： ffmpeg -f concat -i […]
Can’t write packet with unknown timestamp
FFmpeg报错：
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[matroska @ 0x7f9206809800] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly [matroska @ 0x7f9206809800] Can't write packet with unknown timestamp av_interleaved_write_frame(): Invalid argument |
这个问题出在avi格式的视频上，解决： 在ffmpeg后面加上：-fflags +genpts
lxd如何释放快照占用的容器空间
容器用的久了，可能会发现即使文件删了，空间仍然没有释放。。。这是因为快照在作怪，如果删除的文件有快照在引用的话 ，删除文件是不会释放空间的，那么如何删除快照呢？ 查看快照： zfs list -t snapshot -r m-zfs/con […]
Linux下如何快速打包大量文件
平时压缩文件的时候都是用zip命令，不过这个命令对多线程不友好，另外，速度也太慢。 有时候我们只是想单纯的打包一下文件，便于移动和传输，这时就可以直接使用打包命令，不进行压缩。 这里推荐pigz命令，它支持多线程，基本上是秒杀其他。 安装： […]
files list file for package ‘libapt-pkg5.0:amd64’ is missing final newline
使用apt-get安装包的时候出错：
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Fetched 12.2 MB in 1s (8,002 kB/s) Extracting templates from packages: 100% Selecting previously unselected package fonts-dejavu-core. dpkg: unrecoverable fatal error, aborting: files list file for package 'libapt-pkg5.0:amd64' is missing final newline |
解决： 新建一个py文件，然后输入：
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#!/usr/bin/python # 8th November, 2009 # update manager failed, giving me the error: # 'files list file for package 'xxx' is missing final newline' for every package. # some Googling revealed that this problem was due to corrupt files(s) in /var/lib/dpkg/info/ # looping though those files revealed that some did not have a final new line # this script will resolve that problem by appending a newline to all files that are missing it # NOTE: you will need to run this script as root, e.g. sudo python newline_fixer.py import os dpkg_path = '/var/lib/dpkg/info/' paths = os.listdir(dpkg_path) for path in paths: path = dpkg_path + path f = open(path, 'a+') data = f.read() if len(data) > 1 and data[-1:] != '\n': f.write('\n') print 'added newline character to:', path f.close() |
然后终端运行即可：python […]
Ubuntu安装三位数版本号Qbittorrent4.2.5
编译安装真是艰难，各种报错，一个错接着一个错！好在成功装好了，下面是安装方法，遇到报错可以本站搜索，基本上是涵盖了常见错误。文末我把这次安装的错误也汇总一下。 安装流程： wget https://github.com/qbittorren […]
Qbittorrent：Could not find Boost
又出问题： Could not find Boost 解决方法： wget https://jaist.dl.sourceforge.net/project/boost/boost/1.77.0/boost_1_77_0.tar.gz ta […]
Package nss was not found in the pkg-config search path.
qmake编译过程中出错：
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ERROR at //build/config/linux/pkg_config.gni:103:17: Script returned non-zero exit code. pkgresult = exec_script(pkg_config_script, args, "value") ^---------- Current dir: /home/mcj/qt-everywhere-src-5.15.2/qtwebengine/src/pdf/release/ Command: /usr/bin/python2 /home/mcj/qt-everywhere-src-5.15.2/qtwebengine/src/3rdparty/chromium/build/config/linux/pkg-config.py -p pkg-config nss -v -lssl3 Returned 1. stderr: Package nss was not found in the pkg-config search path. Perhaps you should add the directory containing `nss.pc' to the PKG_CONFIG_PATH environment variable No package 'nss' found Could not run pkg-config. See //build/config/linux/nss/BUILD.gn:15:3: whence it was called. pkg_config("system_nss_no_ssl_config") { ^--------------------------------------- See //crypto/BUILD.gn:214:25: which caused the file to be included. public_configs += [ "//build/config/linux/nss:system_nss_no_ssl_config" ] ^-------------------------------------------------- Project ERROR: GN run error! Makefile:65: recipe for target 'sub-gn_run-pro-make_first' failed |
解决方案： sudo apt-get install libnss3-dev
