Uly.me

cloud engineer

FFMPEG Convert TS to MP4

If you have video files that are formatted in MPEG-2, video files with a .m2ts extension, you can convert them to MP4 using ffmpeg.

ffmpeg -i input.ts -c:v libx264 -c:a aac output.mp4

The video is encoded using open format H.264, while audio is encoded using AAC.

Mac OS Catalina

I’ve updated my system to the latest Mac OS 10.15.1 codenamed Catalina. Well, it broke a couple of apps that I use regularly, Audacity and OBS. There are currently no updates from Audacity. However, OBS has a workaround in terms of a test build. You have to download it, and set the system preferences to allow the Mac OS to access the cameras (webcam) and audio devices (microphones). There are no official releases yet from neither Audacity and OBS projects. Maybe in a couple of months.

RFC 1918

Here’s the original document published back in February 1996 detailing the allocation for private internet addresses. The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets. RFC 1918.

10.0.0.0        -   10.255.255.255  (10/8 prefix)
172.16.0.0      -   172.31.255.255  (172.16/12 prefix)
192.168.0.0     -   192.168.255.255 (192.168/16 prefix)

GCP Compute Disks Move

Here’s how to move a GCP disk between zones.

  1. Make sure disk is detached from instance.
  2. Use the GCloud Disk Move command.
# Detach disk from instance
gcloud compute instances detach-disk server --disk=server-boot
# Move disk from us-central1-b to us-central1-f
gcloud compute disks move example-disk-1 --zone us-central1-b --destination-zone us-central1-f