Tom Purl wrote:
> First, let me say that I started using MVPMC last night with my new
> MediaMVP box, and am very impressed. In very little time, I was able to
> watch all of the MPEG, MythTV, AVI, and Ogg recordings stored on my
> media server. Keep up the good work!
>
> Actually, the only problem I had at all was that non-MPEG video playback
> was a little slow. I found out today that I can tweak the quality
> settings of VLC to help fix this, but I would really like to keep the
> quality as high as possible. So I guess my question is, where is the
> transcoding bottleneck on my system?
>
> Here's my system's specs:
>
> * Processor: 1.8 Ghz Sempron 3100+
>
> * RAM: 512 MB (yes, believe it or not, you can run something larger than a
> cell phone on half a gig of ram)
>
> * Other Services Running: Mysql, MythTV, SSH, NFS, Samba
>
> I found that when I closed some of the more resource-hungry GUI apps on
> my media server such as Firefox, that improved playback speed. This
> leads me to believe that it's simply a RAM issue on my machine, but on
> the VLC page on the MVPMC wiki (<http://mvpmc.wikispaces.com/vlc>), I'm
> lead to believe that transcoding is mostly a CPU-intensive process.
> What am I missing?
>
> Thanks in advance for any help!
>
> Tom Purl
I am running on a 3.2 Ghz P4, and I have run mplayer transcoding on both that
box and a 2.0Ghz Sempron 3400+ (2.0 Ghz) and under mplayer they are about the
same so I *ASSUME* that under VLC they should be about the same, though it does
look like for my 2.0 Ghz transcoding (with mplayer) is right on the edge with
1920x1080 videos, it easily does the 1280x720 videos.
The two things to look at would be to make sure that the cpu is getting sped up
"cat /proc/cpuinfo" also while running vlc do a "vmstat 1" and observe when a
slow down happens if numbers appear in certain columns to indicate paging, if
so
you need more ram. It is kind of annoying that the DDR ram is so much more
expensive than the DDR2 ram.
My backend machine has only 1GB of ram and that appears to be somewhat tight
for
just backend services (no gui up), so I would expect 512 MB to be very
troublesome to run backend, mysql and vlc at the same time.
Roger
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