Das Werkstatt

[PROBLEM] I've tried to convert a lossless encoded FFV1 file to MP4 in Virtualdub, using Koepi's XviD Windows codec package build. Regardless which profile I selected or xvid settings I chose, I always got the same error when trying to start the transcoding: Unable to initialize the output video co...

Here's a small and short HowTo about how to create a proper patch after making changes to FFmpeg. It will assume the target revision to be "git HEAD". 1) Checkout the current git version: $ git clone git://source.ffmpeg.org/ffmpeg.git 2) Keep a fresh, untouched copy: Before touching the gi...

The Linux Kernel software RAID is configured by default to run an automated check of RAID arrays. That's good! This check is happening in the background, but depending on your setup and use cases, you might want to re-schedule or disable it. Here's how you can stop an ongoing check: $ echo "idl...

Since the target disk once belonged to a RAID1, Linux will automatically find the superblock and start the RAID array. Even though, the disk was never fully synchronized with the source (master). In case you want to make sure you don't accidentially cause the RAID1 to rebuild the empty onto the clea...

In order to speed up the RAID synchronization, I moved the whole array from the Raspberry Pi to another computer which faster USB (they were external drives). I accidentially mixed up source and target drive while connecting, and after some unplug/replug chaos, I decided to start clean and only atta...

[PROBLEM] I created a RAID1 without having the second disk connected. It worked. Then I connected the 2nd disk, partitioned it to match the first one, and then used mdadm to add it to the RAID array: $ mdadm --add /dev/md0 /dev/sdb1 Worked. Strangely though, I checked /proc/mdstat - and saw the 2nd...

I've done this together with ^Rooker before without problems. I regret that we haven't written the process down here, so I'm doing this now. Run "raspi-config": $ sudo raspi-config Then choose the item "overclocking" and select the last line starting with "Turbo": Turbo...

[PROBLEM] I'm trying to extract a certain range from a VOB file on a DVD for use in a news production. The DVDs were recorded in-house, using a hardware DVD-recorder. I've ripped the iso (using dvdisaster) and can play the videos without problems in VLC, mplayer, etc. Now it should be easy, but it'...

[PROBLEM] When opening a video with PAL resolution (720x576) in Shotcut, it is squished and some vertical lines are dropped by that resize. This not only distorts the picture in an unpretty way, but also adds black borders on the left- and right-side of the image. [SOLUTION] Actually this is a work...

[PROBLEM] I tried to compare two images using ImageMagick's "compare" , but always received the following error: compare: images too dissimilar `color_squares/b-b.png' @ error/compare.c/CompareImageCommand/926. The code has worked in the past, but it seems that the ImageMagick version got...

[PROBLEM] I've installed a Blackmagic Decklink SDI card into one of our GNU/Linux video workstations. Driver installation and firmware update went without any problems. Now I'd like to use " Shotcut " to play a testvideo over the Decklink's SDI out. I selected the Philips PM5544 test imag...

[PROBLEM] Trying to open AVI files with VirtualDub over Samba over GlusterFS mountpoint returns the following error message: "Cannot read from file "xxx.avi": The process cannot access the file because another process has locked a portion of the file." Other applications can ope...

The output of "lspci -vv": I know it's lengthy, and maybe boring for some, but I post this here for others to compare, in case they need it. 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) Subsystem: Super Micro Computer Inc Device 0624 ...

Here's a minimal BASH script for creating a text listing that shows all hardware information about all the storage-drives in a Backblaze Pod: INFO_FILE="hdd_info.txt" date > $INFO_FILE for DISK in /dev/disk/by-path/pci-0000:0[246]*; do echo "Disk: $DISK" hdparm -I $DISK >> $INFO_...

This thread contains some information about setting up a Backblaze Storage Pod v2.0 - and some numbers about its performance, etc. The system was set up as follows: RedHat Enterprise Linux Server x86_64 v6 3x RAID6 with 15 disks each Default hardware, as supplied by Protocase: SuperMicro board, Inte...