Changes for page Video Capture of Computer Screens
Last modified by Drunk Monkey on 2024-10-09 05:32
From version
30.1


edited by Drunk Monkey
on 2022-01-27 18:11
on 2022-01-27 18:11
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To version
27.1


edited by Drunk Monkey
on 2022-01-27 16:24
on 2022-01-27 16:24
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... ... @@ -68,11 +68,7 @@ 68 68 === Mac OSX === 69 69 70 70 1. Install VLC 71 - 72 72 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. 76 76 ))) 77 77 ))) 78 78 ... ... @@ -95,12 +95,11 @@ 95 95 96 96 (% style="font-size:14px" %)This will create a video file called "screenCapture.mkv" on your desktop that you can replay using VLC Media Player. 97 97 98 -(% style="font-size:14px" %)The parameters to the ffmpeg command have the following meaning s94 +(% style="font-size:14px" %)The parameters to the ffmpeg command have the following meaning 99 99 100 -(% class=" gridmin" %)96 +(% class="min" %) 101 101 |-f gdigrab|gdigrab is the windows framebuffer, where the screen is stored 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. 98 +|-t 6|capture 6 seconds of video and exit. 3600 = 1 hour, 14400 = 4 hours 104 104 |-draw_mouse 1|capture the mouse pointer 105 105 |-i desktop|capture the entire desktop - remember to maximize your window 106 106 |-c:v libx264rgb|this video encoder will preserve the rgb color values losslessly ... ... @@ -118,28 +118,8 @@ 118 118 ((( 119 119 === Mac Video Capture === 120 120 121 - Open a terminal window and run thefollowing commands:116 +sfasd 122 122 123 ->(% style="font-size:14px" %)cd ~~/Desktopffmpeg -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 124 - 125 -(% style="font-size:14px" %)This will create a video file called "screenCapture.mkv" on your Desktop that you can replay using VLC Media Player. 126 - 127 -(% style="font-size:14px" %)The parameters to the ffmpeg command have the following meanings 128 - 129 -(% class="min lined" %) 130 -|-f avfoundation|gdigrab is the windows framebuffer, where the screen is stored 131 -|-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 132 -|(% 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. 133 -|-pixel_format 0rgb|get the data as RGB colors instead of some bizzzare color model 134 -|-capture_cursor 1|capture the mouse pointer 135 -|-capture_mouse_clicks 1|and capture the clicks with an onscreen visual notification 136 -|-i "1:"|capture the first screen. Not really important unless you have multiple screens and you are not capturing the primary screen 137 -|-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 138 -(I'm still looking to improve upon this - the windows encoding has an exact RGB color modelling which means no color shift) 139 -|-c:v libx265|encode the video using H.265 compression. It makes for smaller videos without consuming too much processing time 140 -|-crf 0|lossless compression 141 -|-preset ultrafast|save the data as quickly as possible, don't waste too much time compressing the data. 142 - 143 -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. 118 +asdfasdf 144 144 ))) 145 145 )))