Dropping frames with Intensity Pro

[kILLDR3n]

My RAID 0 setup is fine, it measured about 206 for read and write and about 115fps for 720p.

For some parts of the dropped frames I think its the media player such as WMP or Realplayer I used a couple of times and I would replay over a part with dropped frames and it would be smooth now. Other times it drop so that the next frame will be a few seconds later. But then again I could hear sound the whole time, and it was smooth. So could it be the media players? I don't think its my CPU, my usage is only about 30% while capturing. Could it be RAM? I'm running a 2.67Ghz Core 2 Duo and 2GB RAM. Would another 2GB of RAM fix this?

[edDV]

Is the RAID separate from the OS drive?

[kILLDR3n]

I just imported into Vegas and it showed the video as almost 3x as long as it actually was. The video started with the original frame but was frozen like that for about 30 sec and then it actually started later. The audio started immediately though and was not in sync. Throughout the video there were a bunch of frame drops and a frame would freeze for a few seconds or more a bunch. What could be the issue?

Also that was the 3rd video that I have recorded to my disks. The first one was completely fine. It had very little frame drops and some of them were actually the media player. But, I am recording from an Xbox 360, and near the end of the video while playing Modern Warfare 2 the host left so it was doing the migration. The video was fine up until this point. Then after that, the audio skipped to the very last about 10 sec of the video and stopped. The video continued as one frame and with a bunch of frame drops, it was weird. I will try to post this video soon.

[kILLDR3n]

Is the RAID separate from the OS drive?

Yes it is. Its 2 750GB WD Caviar Blacks. I was recording uncompressed 720p 59.94 fps.

I hope its not the hard drives. Worst case scenario I just have to get more RAM. I didn't see the CPU usage spiking a lot though while recording, I think it was at about 30%. I will try again later.

[jagabo]

Video capture requires both high throughput and low latency. Consider a hypothetical example: a drive (or RAID array) that gets 100 MB/s transfers for 99 seconds, then 0 MB/s for 1 second, then 100 MB/s for another 99 seconds, and 0 MB/s for a second, etc. On average it achieves a throughput of 99 MB/s. But that one second pause every 100 seconds will cause massive frame drops in a video capture.

Some RAID controllers in the past have been unsuitable for video capture because of issues like this. Try using a disk utility that show you the transfer graph with low temporal granularity. See if it's nice and smooth or full of peaks and valleys.

[kILLDR3n]

Video capture requires both high throughput and low latency. Consider a hypothetical example: a drive (or RAID array) that gets 100 MB/s transfers for 99 seconds, then 0 MB/s for 1 second, then 100 MB/s for another 99 seconds, and 0 MB/s for a second, etc. On average it achieves a throughput of 99 MB/s. But that one second pause every 100 seconds will cause massive frame drops in a video capture.

Some RAID controllers in the past have been unsuitable for video capture because of issues like this. Try using a disk utility that show you the transfer graph with low temporal granularity. See if it's nice and smooth or full of peaks and valleys.

Can you give me the name of one? I don't have any.

Also here is a video of what is happening.

http://www.youtube.com/watch?v=EOzG7-9451o

That was the first video onto the disk. I have two other captures on there now and they are completely like the end of that video was.

[jagabo]

Try HD Tune: http://www.hdtune.com/

[kILLDR3n]

Here's the read or if this is what you wanted to see. Am I supposed to be able to do the write test, because I can't it says unless I remove all partitions.

[kILLDR3n]

Here's the write I just deleted the partition and will format again later. What could cause the big drop in there?



Would I need a new RAID controller? If so name some that are good and not expensive.

[kILLDR3n]

I also found out that I was supposed to create a New Striped Volume, but it wouldn't let me select it. Only let me select New Simple Volume.

Is there definitely something wrong with my RAID controller?