screencast

Using Gstreamer to capture screen and show it in a window?

由 ≡放荡痞女 提交于 2019-12-18 06:49:47
问题 I need to capture the screen of the second display and "monitor" it in the main display, inside a window (scaled at x0.5 and with neighbor interpolation because I prefer performance against quality). From this link, I've got this screencast command: gst-launch ximagesrc ! ffmpegcolorspace ! queue \ ! vp8enc quality=10 speed=2 ! mux. alsasrc ! audio/x-raw-int ! queue \ ! audioconvert ! vorbisenc ! mux. webmmux name=mux \ ! filesink location=screencast.webm ... but it capture to a file (not a

In chrome extensions, is there a way to record screen without ssl?

由 折月煮酒 提交于 2019-12-12 01:48:25
问题 I'm not sure if this is possible but is there a way to capture screen using an extension without an https url and without going into native code? Does chrome provide some kind of API call for capturing screen with a compression codec that doesn't involve chrome.desktopCapture ? I'm also wondering how something like screencastify works, where does one begin with trying to build something like this? 来源： https://stackoverflow.com/questions/29035215/in-chrome-extensions-is-there-a-way-to-record

How to reduce CPU consumption by using avconv and pipe it to avplay?

由 十年热恋 提交于 2019-12-11 23:31:21
问题 See FINAL EDIT. I need to capture the second monitor and show in main display in a small window. I don't need quality, but performance. So, the (working) command to capture second monitor of 1280x1024 and show it in a 640x480 window at 15fps and horizonatally flipped, would be (from askUbuntu): avconv -f x11grab -r 15 -s 1280x1024 -i :0.1 -c:v mpeg4 \ -b:v 1000k -s 640x480 -vf "hflip" -f avi - | avplay -i - How to scale with "None" interpolation? I used "-c:v mpeg4" and "-b:v 1000k" to have a

Use adb screenrecord command to mirror Android screen to PC via USB

由 夙愿已清 提交于 2019-11-28 16:06:53
I've tried the suggestion from fadden to mirror the Android screen to PC, but the vlc player screen show nothing: What would be the correct commands lines for this function? Thanks. fadden I don't remember the vlc command line that I used for the initial testing. I've tried a few different things recently, on desktop Linux (Ubuntu 15.10). VLC If you just pipe the output into vlc --demux h264 - , it appears to work, but you get gradually farther behind. Adding --h264-fps=60 seems to help that, but you start getting errors (" ES_OUT_SET_(GROUP_)PCR is called too late "). Adding --clock-jitter=0

Use adb screenrecord command to mirror Android screen to PC via USB

由 大城市里の小女人 提交于 2019-11-27 09:35:21
问题 I've tried the suggestion from fadden to mirror the Android screen to PC, but the vlc player screen show nothing: What would be the correct commands lines for this function? Thanks. 回答1: I don't remember the vlc command line that I used for the initial testing. I've tried a few different things recently, on desktop Linux (Ubuntu 15.10). VLC If you just pipe the output into vlc --demux h264 - , it appears to work, but you get gradually farther behind. Adding --h264-fps=60 seems to help that,

ffmepg video from uneven sequence of png images

由 谁说我不能喝 提交于 2019-11-26 22:09:27
问题 I'm going to make a video from series of screenshots (.png files). For each screenshot there is assosiated timestamp information about when it was taken. The time intervals between screenshots may vary and it's highly desired to preserve that difference in the video. Is there a way to use single ffmpeg command/API providing to it sequence of image + time (or frame) offset and getting one video file as output? By now I have to generate short video files of custom length for each image, and
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