[Alternate found] gtk-recordmydesktop - incorrect video speed

Mr. Alex · 2011-09-19 18:13:04

Hello bbs.archlinux.org!
When I record my screen with gtk-recordmydesktop and then watch the result later - it just doesn't go as is was going when recorded. Video has pauses and between those pauses it kinda goes a little faster. I know the speed I type with. And when I watch it on the video it goes FAST for several chars (faster than I type) and then makes pause which I don't make when type. Even after converting OGV video into AVI (I suggested this might help) it's still incorrect.

What am I doing wrong?

Last edited by Mr. Alex (2011-09-20 14:09:09)

Mr. Alex · 2011-09-20 11:09:48

Maybe that's happening because my CPU (Celeron 440) is not enough? What are real system requirements for gtk-recordmydesktop?

thisoldman · 2011-09-20 12:02:35

Could this be related to your power supply and mouse problems in your other thread, https://bbs.archlinux.org/viewtopic.php?id=126787?

Mr. Alex · 2011-09-20 13:29:29

No, I really don't think so. APC gives click-like switches whereas video recording just goes the way I described it all the time.

Cloudef · 2011-09-20 13:40:36

recordmydesktop is quite bad for capturing IMO. I have the same problem even with quite beefy CPU, use ffmpeg instead (and glc for openGL applications).
Also more desktop suited kernel helps, such as -ck. Or realtime one even better if you don't mind the high CPU usage.

Some stuff from my .funcs

############################
## Screen capture to file ##
############################
function screencap() {
   local fd="${1-capture.mkv}"
   local WININFO="`xwininfo`"
   local INRESW=`echo "$WININFO" | grep 'Width:'                  | awk '{print $2;}'`
   local INRESH=`echo "$WININFO" | grep 'Height:'                 | awk '{print $2;}'`
   local INPOSX=`echo "$WININFO" | grep 'Absolute upper-left X:'  | awk '{print $4;}'`
   local INPOSY=`echo "$WININFO" | grep 'Absolute upper-left Y:'  | awk '{print $4;}'`

   local INRES="${INRESW}x${INRESH}"
   local INPOS="${INPOSX},${INPOSY}"

   local FPS="24"                      # Target FPS
   local PRESET="ultrafast"

   echo "---------$INRES+$INPOS------------"
   echo ""

   ffmpeg -f x11grab -s "$INRES" -r "$FPS" -i :0.0+$INPOS \
      -f alsa -async 1 -ac 2 -i hw:0,0 -vcodec libx264 -vsync 1 -vpre $PRESET -sameq \
      -acodec pcm_s16le -threads 0  "$fd"
}

##############################
## Encode GLC captured file ##
##############################
glc-encode() {
   if [[ ! "$1" ]] || [[ ! "$2" ]] || [[ ! "$3" ]] || [[ ! "$4" ]]; then
      echo "Usage : glc-encode [input] [audio bitrate] [video bitrate] [output]"
      return
   fi

   if [[ "$2" != "0" ]]; then
      glc-play "$1" -o - -a 1 | ffmpeg -i pipe: -ab $2 /tmp/audio.mp4
   fi
   if [ -f /tmp/audio.mp4 ]; then
      glc-play "$1" -o - -y 1 | ffmpeg -i pipe: -i /tmp/audio.mp4 -acodec copy -b $3 "$4"
      rm /tmp/audio.mp4
   else
      glc-play "$1" -o - -y 1 | ffmpeg -i pipe: -b $3 "$4"
   fi
}

The screencap function will allow you select a window, click root window for full screen capture.
glc-encode encodes glc captured videos.

Last edited by Cloudef (2011-09-20 13:42:39)

Mr. Alex · 2011-09-20 14:08:43

Thanks. This thing ( http://unix.stackexchange.com/questions … with-audio ) works properly.

Arch Linux

#1 2011-09-19 18:13:04

[Alternate found] gtk-recordmydesktop - incorrect video speed

#2 2011-09-20 11:09:48

Re: [Alternate found] gtk-recordmydesktop - incorrect video speed

#3 2011-09-20 12:02:35

Re: [Alternate found] gtk-recordmydesktop - incorrect video speed

#4 2011-09-20 13:29:29

Re: [Alternate found] gtk-recordmydesktop - incorrect video speed

#5 2011-09-20 13:40:36

Re: [Alternate found] gtk-recordmydesktop - incorrect video speed

#6 2011-09-20 14:08:43

Re: [Alternate found] gtk-recordmydesktop - incorrect video speed

Board footer