[mythtv-users] Advice on getting best archive quality?
Corey Wirun
corey at calgary.homelinux.net
Fri Feb 29 21:58:49 UTC 2008
Hi All,
I'm trying to improve video quality when I archive to DVD. My recordings are grainy with motion-related artifacts that appear. I'm using the removecommercials scripts that is on the net. I could use a little advice here on how to get TV quality recordings on disk.
What I do not understand is the the script (run as a user job) takes a 2.2Gig recording and puts it down to 750K. Is this where the initial quality loss is? I understand that the script flags the commercials then transcodes the result to a smaller file. Marginally smaller I can understand due to the loss of commercials, but what is actually reducing the file size by 65%? Different format?
Also, is the quality degrading even further because I'm trying to burn 6 hours of programming on a DVD? If I want near-TV quality, how much recording capacity can I expect on a 4.7Gig DVD?
I have a PVR-350 and I record using a recording profile with:
Image size: 720x480
Video Codec: MPEG-2
Stream type: MPEG-2 PS
Aspect: 4:3
Bitrate: 4500
Max Bitrate: 6000
Audio Codec: MPEG-2 Hardware Encoder
Sampling: 32000
Type: Layer II
Bitrate: 384kbps
All of my recordings will go to DVD exclusively. If I use the removecommericials script as a user job, is setting a job transcoder redundant? Similarly, is setting 'auto-transcode' and 'commercial removal' flags redundant?
I set all of my transcoder profiles identical:
Video Codec: MPEG-4
Bitrate: 2200
Enable High Quality encoding: off
Enable 4MV: off
Enable interlaced DCT: off
Enable interlaced motion estimation: off
Thanks in advance for any help!
Corey.
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