[kwlug-disc] OT: Sensible Transcode/Handbrake settings for Blu-ray files

[Khalid Baheyeldin]

I had a similar problem when I started recording from the ATSC antenna
using
a cheap PVR.

The recording are in .mts format, and I convert them into .mkv using aconv,
which is part of libav-tools, which is the fork of ffmpeg used on Ubuntu.

I have a script that renames files and reduce them.

The relevant part of the script is this:

PATH_IN=something.mts
PATH_OUT=something.mkv
avconv -v fatal -y -i $PATH_IN  -c:v libx264 -crf 22 -s hd720 -preset
veryfast -acodec copy $PATH_OUT

The reduction in size is amazing. Instead of 60GB per hour, I can reduce
10X down to
just ~ 6GB or so, with no noticeable loss of quality at all (to my eyes).

Perhaps you can try the above with an .mkv file and see if it makes a
difference.

On Fri, Jan 5, 2018 at 9:28 AM, Charles M <chaslinux at gmail.com> wrote:

> Good chilly morning KWLUG! I've been ripping DVDs and Blu-ray discs
> for several years now for use on the KODI server attached to our
> living room TV and shared with a couple of Android boxes in other
> rooms. During that time I've been battling with storage problems. DVDs
> are not so much of an issue, the file sizes are small, and the quality
> is acceptable for the medium. Blu-ray files are the real problem. I
> use MakeMKV on Linux (licensed user, was worth it) to rip Blu-rays.
> MakeMKV is great, but the resulting Blu-ray files are sometimes very
> large (45GB).
>
> I started re-encoding a file once with Handbrake, but stopped once I
> realized it was going to take over an hour to re-encode it on my
> A8-5600k (16GB, NVidia GeForce 650Ti). Part of the reason I stopped it
> was because I had no idea if:
>
> * The video would retain a decent amount of detail (can you still see
> details in the face/eyes)
> * The size would be much different? Blu-rays are already highly compact
> AFAIK
> * Would the subtitles still be in the resulting file? (subtitles are
> important for me)
>
> My solution up to this point has just been to throw more storage at
> the problem. At first it was adding a 3TB drive to the existing 2TB
> drive, then another 3TB drive, before finally breaking down and buying
> an 8TB drive. At the moment I'm just using the 8TB drive, with the 2,
> 3, and 3 as external backup drives. I'm embarrassed to say I'm running
> out of space on the 8TB drive (I blame Game of Thrones).
>
> Ideally wondering if someone has a script to batch process files using
> ffmpeg or transcode with reasonable settings for quality?
>
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Khalid M. Baheyeldin
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