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From: Tristan on 13 Aug 2010 21:47
I don't know what hardware we have to be honest. I'm sure they are multi
core and I know they are XEON's 64bit Linux

Graphics card i'm sure is just some integrated garbage.

As for software I am using FFMPEG

Thanks, T

On Fri, Aug 13, 2010 at 3:41 PM, Ashley Sheridan
<ash(a)ashleysheridan.co.uk>wrote:

> On Fri, 2010-08-13 at 15:24 -0600, Tristan wrote:
>
> Here's a question for you about encoding on the server. If two videos are
> encoding at the same time. Do they share the processing power.
>
> lets say we have 2 vids same size
>
> 1 encodes at 1 minute
>
> and then if 2 are going at the same time does it encode them both in 2
> minutes?
>
> Thanks, T
>
> On Fri, Aug 13, 2010 at 3:08 PM, Ashley Sheridan
> <ash(a)ashleysheridan.co.uk>wrote:
>
> > On Fri, 2010-08-13 at 14:48 -0600, Tristan wrote:
> >
> > i have a list of people that uploaded their videos waiting to be encoded.
> >
> > these are the line items for the db
> >
> > id | member_id | created | status
> >
> > I just want to make sure that everyone gets a turn processing.
> >
> > I was thinking WHERE DISTINCT(member_id) and created (oldest)
> >
> > but i see some flaw in that.
> >
> >
> > if someone uploaded 20 vids and then someone else uploads 30 vids they'll
> > still have to wait until the 20 finish.
> >
> > Almost have to keep a list of the users being processed in another table and
> > if someone else comes along append them in.
> >
> > say we have 5 people that uploaded multiple videos. I want it to go like
> >
> > sandy, tom, jim, harry, star
> >
> > and then back to
> >
> > sandy, tom, jim, harry, star
> >
> > then if someone else comes into the mix. add them to that queue
> >
> > Thanks, T
> >
> >
> > You can probably do it with the one video list in the DB. Each time your
> > video encoder has a free spot it should obtain a list of videos from this
> > table from the last time period, both processed and waiting to be queued.
> > Look up the first one from this list and check to see if a video for the
> > same user has been processed within a specific time period. If yes, then
> > move to the next video in the list and check that in the same manner, and
> > repeat until you find one. If you don't find any, then you can just pick any
> > video from the list.
> >
> > You should be able to process several videos at the same time on a decent
> > server, and a 64-bit system should make mincemeat of an encode as it should
> > do that type of number crunching more quickly.
> >
> > Thanks,
> > Ash
> > http://www.ashleysheridan.co.uk
> >
> >
> >
>
>
> Depends on several factors:
>
> Do you have a multi-core processor? (unlikely that you don't)
>
> Does your encoding software know about the different cores, i.e. can it
> take advantage of them?
>
> Do you have enough RAM on the machine to be shared efficiently by each
> encode?
>
> Do your hard drives have decent caching systems? If each encode were on a
> separate physical disc, then that would speed things up, but only
> marginally.
>
> Sometimes a graphics card can help with encoding issues. Does your system
> have such a card, and is the system able to make use of the capability?
>
> Incidentally, what software are you using to produce the encodes? Is it
> something like ffmpeg or mencoder?
>
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>
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