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Thread: Recording Screen with ffmpeg - error

  1. #1
    Join Date
    Oct 2013
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    Recording Screen with ffmpeg - error

    Trying to record screen with ffmpeg. Can't seem to figure it out.

    Code:
    $ ffmpeg -y -f alsa -i hw:0 -f x11grab -framerate 30 -video_size 1600x900 -i :0.0+0,0 -c:v libx264 -pix_fmt yuv420p -qp 0 -preset ultrafast moetoVideo.avi
    
    
    ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
      configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
      libavutil      55. 78.100 / 55. 78.100
      libavcodec     57.107.100 / 57.107.100
      libavformat    57. 83.100 / 57. 83.100
      libavdevice    57. 10.100 / 57. 10.100
      libavfilter     6.107.100 /  6.107.100
      libavresample   3.  7.  0 /  3.  7.  0
      libswscale      4.  8.100 /  4.  8.100
      libswresample   2.  9.100 /  2.  9.100
      libpostproc    54.  7.100 / 54.  7.100
    Guessed Channel Layout for Input Stream #0.0 : stereo
    Input #0, alsa, from 'hw:0':
      Duration: N/A, start: 1590607126.762333, bitrate: 1536 kb/s
        Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x55e9cfa6aa20] Cannot open display :0.0+0,0, error 1.
    :0.0+0,0: Input/output error
    Please help if you can.

  2. #2
    Join Date
    Jul 2005
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    Re: Recording Screen with ffmpeg - error

    I can not get your command to work either, mine giving a final error
    Code:
    [alsa @ 0x560bc4350980] cannot open audio device hw:0 (No such file or directory)
    hw:0: Input/output error
    Unfortunately my code skills are not good enough to figure out what is wrong with your command.

    I do, however, have two commannds which both work fine; the first has no sound recorded, the second does have sound, though I have not been able to test that at the moment. Try these and see if they are any use to you
    Code:
    ffmpeg -f x11grab -s 1440x900 -r 15 -i :0.0 -s 720x450 -r 15 -qscale 0 Desktop/video.avi
    ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1920x1080 -i :0.0 -acodec flac -vcodec libx264 -threads 0 ./Desktop/mydesktop.mkv
    You will probably need to amend the resolution figures in these to suit your own case, so I wll have to leave that to you to figure out.
    Note also that the first command records the whole desktop @1440x900, but then reduces the output to half that, ie, 720x450.

    Good luck; I hope this is useful.
    DISTRO: Xubuntu 20.04-64bit --- Code-tags --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo --- Wireless-Info --- SolvedThreads

  3. #3
    Join Date
    Oct 2013
    Beans
    45

    Re: Recording Screen with ffmpeg - error

    Thanks!

    Tried the second one with sound and I got the following error:

    Code:
    $ ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1920x1080 -i :0.0 -acodec flac -vcodec libx264 -threads 0 ./Desktop/mydesktop.mkv
    ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
      configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
      libavutil      55. 78.100 / 55. 78.100
      libavcodec     57.107.100 / 57.107.100
      libavformat    57. 83.100 / 57. 83.100
      libavdevice    57. 10.100 / 57. 10.100
      libavfilter     6.107.100 /  6.107.100
      libavresample   3.  7.  0 /  3.  7.  0
      libswscale      4.  8.100 /  4.  8.100
      libswresample   2.  9.100 /  2.  9.100
      libpostproc    54.  7.100 / 54.  7.100
    Guessed Channel Layout for Input Stream #0.0 : stereo
    Input #0, alsa, from 'pulse':
      Duration: N/A, start: 1590614069.562419, bitrate: 1536 kb/s
        Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x5564635ad780] $ ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1920x1080 -i :0.0 -acodec flac -vcodec libx264 -threads 0 ./Desktop/mydesktop.mkv
    ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
      configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
      libavutil      55. 78.100 / 55. 78.100
      libavcodec     57.107.100 / 57.107.100
      libavformat    57. 83.100 / 57. 83.100
      libavdevice    57. 10.100 / 57. 10.100
      libavfilter     6.107.100 /  6.107.100
      libavresample   3.  7.  0 /  3.  7.  0
      libswscale      4.  8.100 /  4.  8.100
      libswresample   2.  9.100 /  2.  9.100
      libpostproc    54.  7.100 / 54.  7.100
    Guessed Channel Layout for Input Stream #0.0 : stereo
    Input #0, alsa, from 'pulse':
      Duration: N/A, start: 1590614069.562419, bitrate: 1536 kb/s
        Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Invalid MIT-MAGIC-COOKIE-1 key[x11grab @ 0x5564635ad780] Cannot open display :0.0, error 1.
    :0.0: Input/output error
    :0.0: Input/output error

  4. #4
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    Jul 2005
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    Re: Recording Screen with ffmpeg - error

    What about the other command; did that work even if silent?

    Can I also check whether you are using an xorg or a wayland session, as I suspect those commands will not work if using wayland because there will be no x11 to grab, though I have almost no knowledge of wayland so far so can't be sure.
    DISTRO: Xubuntu 20.04-64bit --- Code-tags --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo --- Wireless-Info --- SolvedThreads

  5. #5
    Join Date
    May 2020
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    Zud-Afrika
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    Distro
    Xubuntu

    Re: Recording Screen with ffmpeg - error

    if its just a screen recorder you're looking for ,why not try Kazam? it's pretty straight forward

  6. #6
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    Jul 2005
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    Re: Recording Screen with ffmpeg - error

    There's also simplescreenrecorder which is now in the repos for 20.04. It's in the universe repos which I think you may need to enable in software sources if you're using Ubuntu.
    DISTRO: Xubuntu 20.04-64bit --- Code-tags --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo --- Wireless-Info --- SolvedThreads

  7. #7
    Join Date
    Jun 2007
    Beans
    17,314

    Re: Recording Screen with ffmpeg - error

    Should be able to use x11grab in wayland, at least is ok in 20.04, don't have wayland available in my 18.04.
    Run this to see if display is :0, if not then adjust command.
    Code:
    echo $DISPLAY

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