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

Mark Perkins perkins1724 at hotmail.com
Mon Nov 3 05:42:36 UTC 2014



On 3 Nov 2014, at 2:35 pm, "Steve Boyer" <steveboyer85 at gmail.com> wrote:

>> 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 think in recent ffmpeg versions using -movflags faststart will run a second pass to move the moov atom to the start of the file.

> 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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