[mythtv-users] mythtv-users Digest, Vol 139, Issue 79

[Steve Boyer]

>
> Date: Sun, 26 Oct 2014 16:35:53 -0400
> From: Dean Collins <Dean at cognation.net>
>


> I figured this would be the list that knows, whats currently the best DVD
> ripping software (preferably free but will pay for it if I have to).
> I've been using AVOGO to rip MP4 files but just too many duds
> lately.....google is turning up nothing but pyramid affiliate links.....so
> checking with the hive here as to what are you all using?
>

Sorry to re-open Pandora's box here, but I thought that I'd offer my $0.02
and help someone else out doing what I just figured out. After literally
months of searching and trying many different methods, I've found a
combination that I've been very happy lately. Using MakeMKV (has to be
compiled for linux) and then using FFmpeg to convert the decrypted MKV to a
smaller, AAC and x264 MKV.

Some more details w/ FFMpeg:
I compile to include the libfdk_aac audio codec as well as the latest
filters, codecs, features, etc. From there, I use ffplay and the 's' key to
go frame by frame for a bit to examine the raw video - if it requires IVTC
(3 progressive frames followed by 2 interlaced frames), if it required
straight deinterlacing, or if it is good as-is. I also run 1-2 minute
runtime encode using the "-vf cropdetect" option in order to know what to
crop. My commands with FFMpeg tend to look like:

ffmpeg -i file.mkv -vf cropdetect -f null -t 120 /dev/null // to get
cropping information
ffmpeg -i file.mkv -vf fieldmatch,pullup,crop=...(gathered from the last
command) -c:a libfdk_aac -b:a 384k -c:v libx264 -crf 18 -preset slow
movie.mkv

I have been preferring the MKV containers over MP4s, as they don't do the
stupid thing and stick ALL of the codec and video information at the very
end of the file itself. I'll use MP4s when I want my PS3 to play it
however. 384k audio should be imperceptible quality loss for 5.1 sources,
and crf 18 has been giving me great video quality. If straight
deinterlacing is required or there's a heavy mix of the sources, then I'll
forgo "fieldmatch,decimate" and just replace it with "yadif" to deinterlace
and not muck about with the frame-rates. I've fought that battle a lot a
few months ago and conceded that a duplicate frame was not noticable.

If that is too low-level with the video, I'd recommend HandBrake.

I've started putting them in the "videos" directory of MythTV's storage
groups, and then run "mythutil --scanvideos" to update that section. After
that, they will be available on the UPnP server for streaming across the
network.

Steve


>
> Cheers,
> Dean
>
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