REMOVE METADATA FROM IMAGES: UBUNTU with exiftool utility

Just few commands in Ubuntu to check the meta data and thereafter remove the same.I am using a utility exiftool which does not come inbuilt to most of the Linux systems,but we need to install them.

INSTALL COMMAND

sudo apt-get install libimage-exiftool-perl

USAGE COMMAND

exiftool -all= IMG_20200504_215424.jpg

(The above command creates a separate copy of the original file and the new file which is created with removed metadata)

or

exiftool -overwrite_original -all= IMG_20200504_215424.jpg 

(The above command overwrites the original file with the new file created with removed metadata)

Showing you output of one file prior to removal of meta data and thereafter removing the meta data

ORIGINAL FILE

kabali@Kabali:~/Desktop/ddd$ jhead IMG_20200504_215424.jpg
File name    : IMG_20200504_215424.jpg
File size    : 3588382 bytes
File date    : 2021:01:31 14:10:13
Camera make  : Xiaomi
Camera model : Mi A2
Date/Time    : 2020:05:04 21:54:24
Resolution   : 4000 x 3000
Orientation  : rotate 90
Flash used   : No
Focal length :  4.1mm  (35mm equivalent: 4mm)
Exposure time: 0.050 s  (1/20)
Aperture     : f/1.8
ISO equiv.   : 1000
Whitebalance : Auto
Metering Mode: center weight
GPS Latitude : ? ?
GPS Longitude: ? ?
JPEG Quality : 98

REMOVED METADATA FILE

kabali@Kabali:~/Desktop/ddd$ jhead IMG_20200504_215424.jpg

File name    : IMG_20200504_215424.jpg
File size    : 3556853 bytes
File date    : 2021:01:31 14:30:08
Resolution   : 4000 x 3000
JPEG Quality : 98

 

REMOVING META DATA FROM VIDEO FILES : UBUNTU TERMINAL COMMANDS

Hello everyone, this post focuses on removing metadata from a video file using ffmpeg inbuilt utility in Ubuntu OS. The following command includes the original file MAH08207.mp4 being stripped of metadata and being output into a new file as output.mp4.

ffmpeg -i MAH08207.mp4 -map 0 -map_metadata -1 -c copy output.mp4

The output of the command is as below:

ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MAH08207.mp4':
  Metadata:
    major_brand     : MSNV
    minor_version   : 22675568
    compatible_brands: MSNVmp42isom
    creation_time   : 2020-11-09T00:48:18.000000Z
  Duration: 00:00:44.16, start: 0.000000, bitrate: 12146 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4), 1440x1080 [SAR 4:3 DAR 16:9], 12016 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-11-09T00:48:18.000000Z
      handler_name    : Video Media Handler
      encoder         : AVC Coding
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      creation_time   : 2020-11-09T00:48:18.000000Z
      handler_name    : Sound Media Handler
Output #0, mp4, to 'output.mp4':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4), 1440x1080 [SAR 4:3 DAR 16:9], q=2-31, 12016 kb/s, 25 fps, 25 tbr, 25k tbn, 25k tbc (default)
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 1104 fps=0.0 q=-1.0 Lsize=   65489kB time=00:00:44.13 bitrate=12154.5kbits/s speed= 540x    
video:64774kB audio:688kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.039428%

The size of the original file and the stripped of file is

-rw-r--r-- 1 kabali kabali 67050400 Nov  9 06:19 MAH08207.mp4
-rw-rw-r-- 1 kabali kabali 67060450 Jan 29 20:23 output.mp4 

Thus difference between the files is the meta data removed.

I am also showing the output of ffprobe utility run on the two files to show you the difference of meta data removed too.

ffprobe MAH08207.mp4

 ffprobe version 4.2.4-1ubuntu0.1 Copyright (c) 2007-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MAH08207.mp4':
  Metadata:
    major_brand     : MSNV
    minor_version   : 22675568
    compatible_brands: MSNVmp42isom
    creation_time   : 2020-11-09T00:48:18.000000Z
  Duration: 00:00:44.16, start: 0.000000, bitrate: 12146 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4), 1440x1080 [SAR 4:3 DAR 16:9], 12016 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-11-09T00:48:18.000000Z
      handler_name    : Video Media Handler
      encoder         : AVC Coding
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      creation_time   : 2020-11-09T00:48:18.000000Z
      handler_name    : Sound Media Handler

ffprobe output.mp4 

 ffprobe version 4.2.4-1ubuntu0.1 Copyright (c) 2007-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:44.16, start: 0.000000, bitrate: 12148 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4), 1440x1080 [SAR 4:3 DAR 16:9], 12016 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      handler_name    : SoundHandler

SPLIT VIDEOS IN UBUNTU: SINGLE LINE COMMAND{ffmpeg utility}

Sharing here just a single line command of ffmpeg utility which can split a video with time duration's specified.So if your video is suppose 05:03(min:sec) long and you wanna split it into two sizes with part 1 as 00:00 to 02:28 and the other part 2 as 02:28 to 05:03,the commands to be executed will be

ffmpeg -i VID_20210129_115611.mp4 -ss 00:00:00 -t 00:02:28 part1.mp4

ffmpeg -i VID_20210129_115611.mp4 -ss 00:02:28 -t 00:05:03 part2.mp4

where VID_20210129_115611.mp4 is the main file and part1.mp4/part2.mp4 are the respective output files.

MERGE VIDEOs IN UBUNTU: TWO TERMINAL COMMANDS

Hi guys...no time waste here...I m mentioning two commands to simply merge your multiple videos quickly in an Ubuntu OS.No GUI or other applications to download or use. The ffmpeg command inbuilt to Ubuntu easily merges without hassles.

So,the first command is 

find "$(pwd)" -type f -name '*.mp4' -printf "file '%p'\n" | tee mp4_compile.txt

The above command will simply find your all mp4 files in the directory wherein you run this command in the terminal directory and compile them into one text file. This text file is named here as mp4_compile.txt. You can name it any thing.

The second command is as given below:

ffmpeg -f concat -safe 0 -i mp4_compile.txt -c copy merged.mp4

This command will merge all the files compiled in the txt file and merge into one output file names as merged.mp4

Thats all...I actually went through a lot of softwares and applications...tried online merge too but all had some kind of limitation in size...till I found these commands.So happy sharing and happy merging.

NOTHING BLOCKCHAIN ABOUT IT :-)

Ubuntu 20.04 LTS brightness control with command line[SOLVED]

While I moved my kernel face from 18.04  to 20.04 LTS,there were few irritants while I got adapted to new interface and features…and one of them was the missing brightness tab in Ubuntu 20.04 LTS. Don’t know why it was removed,but then may be a small community used it and so was discontinued. So I tried third party plugins, few new brightness apps also tried brightness controller but somehow was not happy with the desired screen brightness control.Though Ubuntu 20.04 has night light feature wherein you can tweak with color temperatures from  less warm to more warm but that too fall short of my requirement. So I just wanted a clean hassle free solution. So I got to know about the xrandr command. Xrandr is used to set the size, orientation and/or  reflection  of  the outputs for a screen. It can also set the screen size. 

The good thing is that this utility comes pre-installed with the OS. You just need to use it vide few command line inputs and these are as below:

The first command is

xrandr | grep " connected" | cut -f1 -d " "

This command basically gives you an output of the name of your monitor. In my case it gives HDMI-0.

 

After this command you need to use the same command with different switch and adjusting the brightness to suit your eyes. While 1 refers to highest brightness 0.1 refers to the lowest.So in bright rooms if you wish to set like me,I generally prefer 0.7.The command line goes like this:

 xrandr --output HDMI-0 --brightness 0.7

Other functions that this utility can assist you are with setting resolution and refresh rates. The command lines are mentioned below:

 

SETTING RESOLUTION

xrandr --output HDMI-0--mode 1680x1050

SCREEN REFRESH RATE

xrandr --output HDMI-0--mode 1680x1050 --rate 60.00

Another switch –q will query your monitors and give details as seen below

 Just remember to change your screen name as per your monitor name...in my case like I said...it is HDMI-0.

CQ 100: Meet India’s Most Influential Cyber Warriors

First post in this year...though little delayed comes as a pleasant surprise from the cyberosphere.....Sharing here the link of a post that has identified India’s most influential cyber warriors  and has listed me too....

https://www.the420.in/cq-100-meet-indias-most-influential-cyber-warriors-top-cyber-experts/

Screenshot as below: