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Changes between Version 4 and Version 5 of Ticket #1036, comment 4


Ignore:
Timestamp:
11/18/15 18:59:35 (5 years ago)
Author:
zenny
Comment:

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  • Ticket #1036, comment 4

    v4 v5  
    11Let me first answer some of your 'why' questions.
     2[[BR]]
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    34Why libreoffice?
    45Because Libreoffice (or her proprietary sisters) is what most of the people use for presentation, I assume.
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    911Because Xvfb does not support opengl, thus producing black screen. Xdummy supports openGL, but, as you too have confirmed after testing, does not work with Ubuntu trusty.
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    1417That appeared to be fastest in my case. I am open to any suggestion.
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    1923UPDATE:
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    3542§3 while capturing, ffmpeg cannot connect to with an error " [x11grab @ 0x2809c00] Cannot open display :99, error 1.\n :99: Input/output error".
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    4048
    4149CAVEAT:
    42 The capture was working fine earlier, but not the display refreshment of the client. Now the display refreshes fine, but capture does not work.
    43 
     50'''The capture was working fine earlier, but not the display refreshment of the client. Now the display refreshes fine, but capture does not work.
     51'''
     52[[BR]]
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    4756
    4857I tried to start virutal X server and xpra with different commands (not the aggregated one as Antoine suggested) like I reported earlier, in that case, the capture works, but the display in captured size is 4K, but the content from libreoffice is same as the display size-FullHD (1/4th of the captured screen).
     58[[BR]]
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    5060Used this comamnd to capture:
     61[[BR]]
    5162
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     64{{{
    5265$ ffmpeg -f x11grab -s 3840x2160 -i :99 -r 24 -deadline realtime -b:v 1M -threads 5 -qmin 0 -qmax 50 -crf 5 -preset ultrafast -f matroska 4k_xpra.mkv
     66}}}