How many HD tracks should I be able to play back?

[BillBarrett]

I'm working on our first HD project. It has 4 cameras throughout a wedding. Shift spacebar lets it play about 10-15 seconds before the buffer goes to 1/171. For 2 tracks, it will play more than a minute. In SD, I can easily play 7 tracks on this system. Have not put any filters on video or audio yet. I can mute video tracks and work through the project, just wondering what other work flow options there are?

Asus P5W DH Deluxe, Core 2 Duo E6600, 4 gigs Kingston RAM, Quadro FX1500, 500 gb SATA system drive, 1TB RAID0 SATA data drive on RocketRAID card, XP Pro SP2, Edius 4.61

[GrassValley_KH]

If you're editing in Multi Cam mode, you can switch the 'skip frames' option to drop frames, maintaining overall realtime playback

[Bassman]

Wow, I did not know HD realtime performance was that tough.

2 tracks without filters and only a minute of playback is pretty far from how I work with DV.

What would/could one do to get better peformance?

Is there a better CPU? File type ect...

[antonsvideo]

I tested multicam with 4 camera 1440x1080i Pal Canopus HQ and it plays all day long without dropping a frame

see PC spec in signature

[Jerry]

I tested multicam with 4 camera 1440x1080i Pal and it plays all day long without dropping a frame

see PC spec in signature

Anton,
I would be curious to see what that thing will do with full raster uncompressed HD.

[antonsvideo]

Anton,
I would be curious to see what that thing will do with full raster uncompressed HD.

I don't have any such test footage

[iibw]

Bill,
Is your HD footage on your timeline m2t or m4v files? Or did you capture to Canopus HQ? If it's the latter, you'll get much more realtime performance.

[STORMDAVE]

Anton,
I would be curious to see what that thing will do with full raster uncompressed HD.

I'm sure it would be easier for the system to handle except you'll need a crazy RAID setup

[BillBarrett]

AVI Files

These are Canopus HQ .avi files. They are about 32 gigs per one hour tape. We got through the ceremony using multicam with a tolerable amount of skipping. The buffer stayed at 3/171 most of the time. We'll try turning on skip frames next time. That was dumped onto one track and the others turned off which plays flawlessly.

On our way. . .

[Imagine Video]

Bill are you using the rocket raid 2310?


You say you have a 1TB RAID 0 is that 4 x 250 gig drives or 2 500's - I am using 4 x 500 sata 2 seagate baraccuda ES class drives and editing a 4 cam shoot in multicam edius 4.6 with full buffer and NO problems with full realtime playback in 1440 x 1080 50 i

Check the performance of the raid remember 4 drives in raid 0 will be far faster than 2

Not sure if you had 2 x 1tb drives that would be the case..........

But my 4 x 500 gigs fly - using HDTACH they achieve over 280mbs in burst mode and over 250 mbs sustained data rate, more than enough for editing HDV in Realtime.

Hope this helps