Update UUID of existing exFAT partition
tune.exfat -I 0x<UUID> <partition>
Categorylinux
Capture video using ffmpeg with an Intensity Pro and compress using VA-API
Hardware accelerated video capturing using VA-API and a Blackmagic Intensity Pro: H.264 video, FLAC audio. Needs a snapshot ffmpeg build with latest Blackmagic SDK & libva: --enable-decklink --enable-vaapi.
ffmpeg -v verbose -vaapi_device /dev/dri/renderD128 -hwaccel vaapi -format_code ntsc -f decklink -i 'Intensity Pro' -c:a flac -compression_level:a 7 -vf 'format=nv12,hwupload' -c:v h264_vaapi -global_quality 10 -y output.mkv
Attempt to perform an operation not allowed by the security policy `PDF’
Change
<policy domain="coder" rights="none" pattern="PDF" />
to
<policy domain="coder" rights="read | write" pattern="PDF" />
in /etc/ImageMagick-?/policy.xml.
Remove invalid characters from filename
detox -r -v -n path/
Nextcloud: reset user password
sudo -u <webuser> php occ user:resetpassword <nextclouduser>
Using substrings in bash
${var:offset:length}
Fix runtime/track length after using mp3wrap
# join files
mp3wrap "output.mp3" input*.mp3
# fix runtime
mp3val -f "output.mp3"
Change default browser
update-alternatives --config gnome-www-browser
update-alternatives --config x-www-browser
Get current configuration:
update-alternatives --get-selections | grep browser
Don’t rotate pages when using pdfjoin
pdfjoin --paper a4paper --rotateoversize false <input.pdf>
VPN server working out-of-the-box with Android
As Android does not support OpenVPN out-of-the-box, I was searching for alternatives. It’s quite easy setting up an IPsec/L2TP PSK server, but a script collection by Lin Song (hwdsl2) makes it even easier: checkout setup-ipsec-vpn.