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97 lines
3.9 KiB
Plaintext
97 lines
3.9 KiB
Plaintext
# this is notes for video: http://www.youtube.com/watch?v=mNz5Lrc06_s
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#-------- FFMPEG X11GRAB Screencasting
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#------------------------------------------------------
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# compile ffmpeg: http://ubuntuforums.org/showthread.php?t=786095
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# proper screencast: http://ubuntuforums.org/showthread.php?t=1392026
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# http://nowardev.wordpress.com/2011/05/23/how-to-screencast/
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# press q to quit
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# orginal one line code for fullscreen
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ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -crf 0 -threads 0 -y screencast_out.avi
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# record single window, use mouse to click on the window to start recording
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ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -frame | grep -oEe 'geometry [0-9]+x[0-9]+' | grep -oEe '[0-9]+x[0-9]+') -i :0.0+$(xwininfo -frame | grep -oEe 'Corners:\s+\+[0-9]+\+[0-9]+' | grep -oEe '[0-9]+\+[0-9]+' | sed -e 's/\+/,/' ) -acodec pcm_s16le -vcodec libx264 -preset ultrafast -crf 0 -threads 0 -y screencast_out.avi
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# -y = will overwrite output file
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#Note: if u have problems with preset errors,
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# run 'x264 -h' look for supported presets and replace it, like
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# ultrafast, superfast, fast ...etc
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#Note 2: If you like to scale down your videos at the same time when recording
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# add in for example
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# -vf "scale=1280:720"
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# The reason this is useful is becuase I have a 16:10 resolution but youtube only supports 16:9
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# So I can avoid the black bars on left/right side of the videos with this option
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#==============================================
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# This is what I use, added to bashrc/zshrc
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FFX_MONO="1" # mono
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FFX_DUAL="2" # dual channel
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FFX_HW="hw:1,0" # alsa; run 'cat /proc/asound/pcm' to change to the correct numbers
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FFX_PULSE="pulse" # pulseaudio; might have to install pavucontrol to change volume
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FFX_FPS="30" # frame per seconds
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FFX_WIN_FULL=$(xwininfo -root | grep 'geometry' |awk '{print $2;}') # record fullscreen
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FFX_AUDIO="pcm_s16le" # audio codec
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FFX_VIDEO="libx264" # video codec
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FFX_PRESET="ultrafast" # preset error? run 'x264 -h' replace with fast,superfast, slow ..etc
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FFX_CRF="0"
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FFX_THREADS="0"
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FFX_SCALE="scale=1280:720" # scale resolution, no black bars on sides of video on youtube
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FFX_OUTPUT=~/Public/screencast/aa_screencast_baking.avi
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# Note: -vf is optional delete if you want, -y is to overwrite existing file
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# capture fullscreen using alsa or pulseaudio
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ffx-full-hw() { ffmpeg -f alsa -ac $FFX_MONO \
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-i $FFX_HW -f x11grab -r $FFX_FPS -s $FFX_WIN_FULL -i :0.0 \
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-acodec $FFX_AUDIO -vcodec $FFX_VIDEO \
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-preset $FFX_PRESET -crf $FFX_CRF -threads $FFX_THREADS \
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-vf $FFX_SCALE \
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-y $FFX_OUTPUT
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}
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ffx-full-pa() { ffmpeg -f alsa -ac $FFX_MONO \
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-i $FFX_PULSE -f x11grab -r $FFX_FPS -s $FFX_WIN_FULL -i :0.0 \
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-acodec $FFX_AUDIO -vcodec $FFX_VIDEO \
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-preset $FFX_PRESET -crf $FFX_CRF -threads $FFX_THREADS \
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-vf $FFX_SCALE \
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-y $FFX_OUTPUT
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}
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# capture single window, use mouse cursor to select window you want to record
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ffx-winselect-hw() {
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FFX_INFO=$(xwininfo -frame)
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ffmpeg -f alsa -ac $FFX_MONO \
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-i $FFX_HW -f x11grab -r $FFX_FPS \
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-s $(echo $FFX_INFO | grep -oEe 'geometry [0-9]+x[0-9]+'\
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| grep -oEe '[0-9]+x[0-9]+') \
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-i :0.0+$(echo $FFX_INFO | grep -oEe 'Corners:\s+\+[0-9]+\+[0-9]+' \
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| grep -oEe '[0-9]+\+[0-9]+' | sed -e 's/\+/,/' ) \
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-acodec $FFX_AUDIO -vcodec $FFX_VIDEO \
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-preset $FFX_PRESET -crf $FFX_CRF -threads $FFX_THREADS \
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-vf $FFX_SCALE \
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-y $FFX_OUTPUT
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}
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ffx-winselect-pa() {
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FFX_INFO=$(xwininfo -frame)
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ffmpeg -f alsa -ac $FFX_MONO \
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-i $FFX_PULSE -f x11grab -r $FFX_FPS \
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-s $(echo $FFX_INFO | grep -oEe 'geometry [0-9]+x[0-9]+'\
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| grep -oEe '[0-9]+x[0-9]+') \
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-i :0.0+$(echo $FFX_INFO | grep -oEe 'Corners:\s+\+[0-9]+\+[0-9]+' \
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| grep -oEe '[0-9]+\+[0-9]+' | sed -e 's/\+/,/' ) \
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-acodec $FFX_AUDIO -vcodec $FFX_VIDEO \
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-preset $FFX_PRESET -crf $FFX_CRF -threads $FFX_THREADS \
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-vf $FFX_SCALE \
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-y $FFX_OUTPUT
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}
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