Changes for page Video Capture of Computer Screens
Last modified by Drunk Monkey on 2024-10-09 05:32
From version
26.1


edited by Drunk Monkey
on 2022-01-27 16:23
on 2022-01-27 16:23
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To version
33.1


edited by Drunk Monkey
on 2022-07-04 07:51
on 2022-07-04 07:51
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... ... @@ -22,16 +22,16 @@ 22 22 === Windows === 23 23 24 24 1. Run the VLC installer 25 + 25 25 1. Install 7-zip 27 + 26 26 1. Extract the contents of the FFmpeg zip file into a suitable directory. I going to use C:\Local\ffmpeg\ as my FFmpeg installation location for this example. You should see something similar to this: 27 -[[image:image-20220127221835-1.png]]((( 28 - 29 -The contents of the ffmpeg filder should look like this: 29 +[[image:image-20220127221835-1.png]] 30 +\\The contents of the ffmpeg filder should look like this: 30 30 [[image:image-20220127225738-2.png]] 31 31 \\Select all the files and move them into the installation directory. That is C:\Local\ffmpeg\ in this example. 32 32 [[image:image-20220127225847-3.png]] 33 33 34 -))) 35 35 1. Next, add the location of the ffmpeg\bin directory to the system path. This is necessary so you can run the command from the command line from a command shell. 36 36 \\Go to the file explorer, and look in the left hand folder list for "This PC" or "My PC" or whatever it is called on your system. 37 37 [[image:image-20220127230601-5.png]] ... ... @@ -68,7 +68,11 @@ 68 68 === Mac OSX === 69 69 70 70 1. Install VLC 71 + 71 71 1. Install Keka 73 + 74 +1. Install FFmpeg through the use of [[HomeBrew>>https://brew.sh]] (recommended because of all the other useful things you can install if you like this kind of stuff) or install the statically linked binary version of the [[FFmpeg binaries>>http://ffmpeg.org/download.html]] from [[https:~~/~~/evermeet.cx/ffmpeg/>>https://evermeet.cx/ffmpeg/]]. This file will need to be placed into a directory that's on your path (not yet described how to do) 75 +\\The statically linked installation is going to be faster and easier to do than the homebrew version. 72 72 ))) 73 73 ))) 74 74 ... ... @@ -82,7 +82,7 @@ 82 82 ((( 83 83 (% class="col-xs-12 col-xs-6" style="border-right:black solid 1px;" %) 84 84 ((( 85 -=== Windows Video Capture===89 +=== Windows === 86 86 87 87 Open a command window, and run the following commands: 88 88 ... ... @@ -91,11 +91,12 @@ 91 91 92 92 (% style="font-size:14px" %)This will create a video file called "screenCapture.mkv" on your desktop that you can replay using VLC Media Player. 93 93 94 -(% style="font-size:14px" %)The parameters to the ffmpeg command have the following meaning 98 +(% style="font-size:14px" %)The parameters to the ffmpeg command have the following meanings 95 95 96 -(% class="min" %) 100 +(% class="grid min" %) 97 97 |-f gdigrab|gdigrab is the windows framebuffer, where the screen is stored 98 -|-t 6|capture 6 seconds of video and exit. 3600 = 1 hour, 14400 = 4 hours 102 +|-t 6|capture 6 seconds of video and exit. 3600 = 1 hour, 14400 = 4 hours. If you omit this parameter, the capture will continue until you press [Control C] to gracefully tell ffmpeg to stop 103 +|(% style="font-size:14px" %)-framerate 60|if you want to see the candles paint second by second, you should have a framerate of at least 60. Technically speaking, you actually need 120, but let's not get too crazy. 99 99 |-draw_mouse 1|capture the mouse pointer 100 100 |-i desktop|capture the entire desktop - remember to maximize your window 101 101 |-c:v libx264rgb|this video encoder will preserve the rgb color values losslessly ... ... @@ -111,10 +111,62 @@ 111 111 112 112 (% class="col-xs-12 col-xs-6" %) 113 113 ((( 114 -=== Mac VideoCapture===119 +=== Mac OSX === 115 115 116 - sfasd121 +Open a terminal window and run the following commands: 117 117 118 -asdfasdf 123 +>(% style="font-size:14px" %)cd ~~/Desktop 124 +>(% style="font-size:14px" %)ffmpeg -f avfoundation -t 6 -pixel_format 0rgb -capture_cursor 1 -capture_mouse_clicks 1 -framerate 60 -i "1:" -filter:v "format=yuv444p" -c:v libx265 -crf 0 -preset ultrafast screenCapture.mkv 125 + 126 +(% style="font-size:14px" %)This will create a video file called "screenCapture.mkv" on your Desktop that you can replay using VLC Media Player. 127 + 128 +(% style="font-size:14px" %)The parameters to the ffmpeg command have the following meanings 129 + 130 +(% class="lined min" %) 131 +|-f avfoundation|gdigrab is the windows framebuffer, where the screen is stored 132 +|-t 6|capture 6 seconds of video and exit. 3600 = 1 hour, 14400 = 4 hours. If you omit this parameter, the capture will continue until you press [Control C] to gracefully tell ffmpeg to stop 133 +|(% style="font-size:14px" %)-framerate 60|if you want to see the candles paint second by second, you should have a framerate of at least 60. Technically speaking, you actually need 120, but let's not get too crazy. 134 +|-pixel_format 0rgb|get the data as RGB colors instead of some bizzzare color model 135 +|-capture_cursor 1|capture the mouse pointer 136 +|-capture_mouse_clicks 1|and capture the clicks with an onscreen visual notification 137 +|-i "1:" 138 +\\\\-i title="window title"|((( 139 +capture the first screen. Not really important unless you have multiple screens and you are not capturing the primary screen 140 +\\to capture a particular window 119 119 ))) 142 +|-filter:v "format=yuv444p"|transform the input colors into this color format, which is fairly quick when converting from RGB and without too much color shifting 143 +(I'm still looking to improve upon this - the windows encoding has an exact RGB color modelling which means no color shift) 144 +|-c:v libx265|encode the video using H.265 compression. It makes for smaller videos without consuming too much processing time 145 +|-crf 0|lossless compression 146 +|-preset ultrafast|save the data as quickly as possible, don't waste too much time compressing the data. 147 + 148 +There is no point in trying to compress this video any further with these parameters. Further compression will require a lot of time and cpu power to see any further gain. 120 120 ))) 150 +))) 151 + 152 +== Audio Capture == 153 + 154 +=== Windows === 155 + 156 +=== Mac OSX === 157 + 158 + 159 +== References == 160 + 161 +FFmpeg documentation: 162 + 163 +* [[https:~~/~~/ffmpeg.org/documentation.html>>https://ffmpeg.org/documentation.html]] 164 + 165 +Lossless capture: 166 + 167 +* [[https:~~/~~/video.stackexchange.com/questions/25034/lossless-capture-with-ffmpeg>>https://video.stackexchange.com/questions/25034/lossless-capture-with-ffmpeg]] 168 +* [[https:~~/~~/video.stackexchange.com/questions/8305/lossless-screen-recording-software>>https://video.stackexchange.com/questions/8305/lossless-screen-recording-software]] 169 +* [[https:~~/~~/trac.ffmpeg.org/wiki/Capture/Desktop>>https://trac.ffmpeg.org/wiki/Capture/Desktop]] 170 + 171 +Video editing programs 172 + 173 +* black magic davinci resolve 174 +* kdenlive 175 +* shotcut 176 + 177 +