为什么会出现此错误以及如何修复它?
[jalal@goku imageSequence]$ ffmpeg -i video_0.avi -qscale:v 1 keyframes/vid0/img_%%06d.jpg
ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static …
Run Code Online (Sandbox Code Playgroud) 我有一个由这样的行组成的文件(包括其他数字)。这是输出的一部分
$ grep 1848 filename.csv
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.csv
假设 1848 位于第一列或第二列,如何找到文件中第三列最低的前 5 行?
1848,2598,11.310694021273559
1848,2599,10.947275955606203
1848,2600,10.635270124233982
1848,2601,11.916564552040725
1848,2602,12.119810736845844
1848,2603,12.406661156256154
1848,2604,10.636275056472996
1848,2605,12.549890992708612
1848,2606,9.783802450936204
1848,2607,11.253697489670264
1848,2608,12.16385432290674
1848,2609,10.30355814063016
1848,2610,12.102525596913923
1848,2611,11.636595992818505
1848,2612,10.741178028606866
1848,2613,11.352414275107423
1848,2614,12.204860161717253
1848,2615,12.959915468475387
1848,2616,11.320652192610872
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不幸的是,1848 有时也会出现在第三列中,我需要忽略它:
6687,8963,9.241848677632822
6687,9111,10.537325656184889
6687,9506,11.315629894841848
Run Code Online (Sandbox Code Playgroud) 我想将一系列 ppm 图像转换为 avi 视频(或 OpenCV 接受的另一种可能的视频格式)。
首先,我将质量没有下降的 ppm 图像转换为 jpg:
for f in *ppm ; do convert -quality 100 $f `basename $f ppm`jpg; done
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然后我使用以下命令转换为avi:
ffmpeg -i CS585Bats-FalseColor_frame*.jpg -vcodec mpeg4 test.avi
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但我收到以下错误:
FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
built on Aug 2 2016 19:05:32 with clang 7.3.0 (clang-703.0.31)
configuration: --enable-libmp3lame --enable-libfaac --enable-gpl --enable-nonfree --enable-shared --disable-mmx --arch=x86_64 --cpu=core2
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 1 / 0.16. 1
libavcodec 52.108. 0 / 52.108. 0
libavformat …
Run Code Online (Sandbox Code Playgroud) 如何剪切 10 分钟视频的前两分钟并将其保存为 first_2min.wmv,然后将第二个 2 分钟保存为 second_2min.wmv 而不更改 Ubuntu 命令行中的视频设置?视频的原始格式也是 wmv。
如何在 Ubuntu 14.04 中为 Python 2.7 安装 Jupyter?
我试过:
sudo add-apt-repository ppa:jolicloud-team/ppa
sudo apt-get update
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更新输出:
Ign file: InRelease
Get:1 file: Release.gpg [181 B]
Get:2 file: Release [196 B]
Ign file: Translation-en_US
Ign file: Translation-en
Hit http://storage.googleapis.com stable InRelease
Ign http://us.archive.ubuntu.com trusty/universe Translation-en_US
Fetched 5,905 kB in 6s (915 kB/s)
W: Failed to fetch http://ppa.launchpad.net/jolicloud-team/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/jolicloud-team/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones …
Run Code Online (Sandbox Code Playgroud) 鉴于我有大约 50k 图像,如何获得所有高度中的最低高度以及所有宽度中的最低宽度?
我尝试了这个命令,但它只给出了图像的宽度和高度:
identify -format '%w %h' 72028059_11.jpg
600 431
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我也从 IRC Linux 频道得到了这个,但是,因为我有 50k 图像,所以需要很长时间才能输出任何结果:
find -type f -name \*.jpg -exec identify -format '%w %h %d/%f\n' {} \; | sort -n -k2
Run Code Online (Sandbox Code Playgroud) 我有一个包含两列(和一个标题)的 CSV 文件,其中每个元素都包含 0 到 199 之间的任意数字。我想将它们转换为相应的 URL。下面是一个例子:
41,51
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应该变成:
http://www.cs.bu.edu/~betke/research/vc-crowd/MSCOCO/41.jpg,http://www.cs.bu.edu/~betke/research/vc-crowd/MSCOCO/51.jpg
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这是我要转换的 list.csv 文件:
$ head list.csv
imageA,imageB
41,51
172,100
99,149
83,72
84,160
186,8
93,198
150,21
63,102
Run Code Online (Sandbox Code Playgroud) 如何自动从 jpg 图像中删除 Alpha 通道?
我正在使用基于 PyTorch 的深度学习代码,需要 3 个通道,但我的图像有 4 个通道。我看到了这个答案,但我不知道如何将文件夹中的所有图像转换为没有 Alpha 通道的对应图像。
这是我收到的错误:
[jalal@goku example]$ python img_to_vec_nearest_neighbors.py
/scratch/sjn-p3/anaconda/anaconda3/lib/python3.6/importlib/_bootstrap.py:219: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
return f(*args, **kwds)
/scratch/sjn-p3/anaconda/anaconda3/lib/python3.6/importlib/_bootstrap.py:219: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
return f(*args, **kwds)
/scratch/sjn-p3/anaconda/anaconda3/lib/python3.6/importlib/_bootstrap.py:219: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88
return f(*args, **kwds)
/scratch/sjn-p3/anaconda/anaconda3/lib/python3.6/importlib/_bootstrap.py:219: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, …
Run Code Online (Sandbox Code Playgroud) 我应该如何解决这个错误?
$ python tensorboard_viz.py
/scratch/sjn-p3/anaconda/anaconda3/lib/python3.6/site-packages/h5py/__init__.py:36: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
from ._conv import register_converters as _register_converters
2018-10-24 19:49:39.925967: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA
2018-10-24 19:49:40.093637: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1411] Found device 0 with properties:
name: GeForce GTX 1080 Ti major: 6 minor: 1 memoryClockRate(GHz): 1.6705
pciBusID: 0000:05:00.0
totalMemory: 10.92GiB freeMemory: 10.03GiB …
Run Code Online (Sandbox Code Playgroud) 我有一个带有制表符或空格分隔符的 txt 文件。我需要将其转换为 csv。您如何建议使用命令行这样做?
$ perl -F"//" -nlae 'for (@F) {$a{$_}++};for (keys %a){print $_ if ($a{$_}+1==5 && !($_=~/\w/))};undef %a' moth_gt.txt
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上面的命令什么都不输出。
该文件如下所示:
$ head -10 moth_gt.txt
1.0000 494.5551 234.2510 711.6219 274.2668 481.7198 299.5598 311.0864 339.5756
2.0000 494.6552 233.6892 698.5310 237.2043 478.3979 300.0367 285.5068 300.0367
3.0000 496.0657 234.5680 660.4773 182.6485 477.8938 299.0346 279.7346 239.3273
4.0000 498.0948 236.4126 618.2942 142.6347 477.2553 302.2803 298.6309 175.0104
5.0000 499.2109 237.2335 603.7807 120.0112 473.9058 307.5669 323.1914 136.0130
6.0000 497.2581 236.8611 616.7132 115.5453 473.4415 309.7994 336.1240 123.7323 …
Run Code Online (Sandbox Code Playgroud) 我应该如何在 Ubuntu 20.04 中解决这个问题?
Invalid MIT-MAGIC-COOKIE-1 keyqt.qpa.xcb: could not connect to display :0
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.
Aborted (core dumped)
Invalid MIT-MAGIC-COOKIE-1 keyqt.qpa.xcb: could not connect to display :0
qt.qpa.plugin: Could not …
Run Code Online (Sandbox Code Playgroud) 我有大约 450 个名为 1...450 的帧。然而,有一些丢失的帧,例如帧 10、30 等不存在。
我想以与 1...450.png 相同的顺序创建 AVI 视频。我该怎么做呢?
所以,当我有 500k json 文件时,我不确定如何做 grep?当我有 200k 时它正在工作,但现在似乎我有太多文件。grep 或任何可以完成任务的东西?
[jalal@ivcgpu1 tweets]$ grep -wirnE 'Wed Oct 19 2(1:[0-5][0-9]:[0-5][0-9]|2:([0-2][0-9]:[0-5][0-9]|30:00)) .* 2016' *
-bash: /usr/bin/grep: Argument list too long
[jalal@ivcgpu1 tweets]$ ls -1 | wc -l
554472
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