|
|
| phaeron |
| Posted: Mar 26 2011, 10:46 PM |
 |
|
Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
|
You are not going to max the SSD for modern video compression algorithms before you hit other bottlenecks. 87MB/sec, or 696Mbit/sec, is a staggeringly high bitrate for a compression method like MPEG-4 or H.264. I'm not even sure they can produce that much compressed data for common resolutions even with everything maxed out. Usually at that rate you'd either be working uncompressed or with a low ratio, lossless format.
There is another bottleneck which you can hit for this kind of frame rate, which is the graphics card. Past a certain point the graphics driver may not be able to issue commands quickly enough to churn through that many frames; it may either have an internal throttle, or it simply might have a timing limitation. It can also be for compatibility reasons, since older games may blow up if the frame rate is too high. Usually there isn't a use to playing videos with so high of a frame rate relative to the display, so the video player won't have logic to work around this.
I guess we'd need more detail to help you further on what you're trying to do. No regular video capture device will produce 300 fps when the input signal is 25 or 29.97 fps; no screen capture software can produce 300 fps when the desktop composition system is capped at refresh rate. I'm not clear on what you're trying to do with these high frame rates.
|
|
| evropej |
 Posted: Mar 27 2011, 02:45 PM |
|
|
Advanced Member
Group: Members
Posts: 514
Member No.: 26523
Joined: 28-November 09
|
I have a video which is recorded at 30 fps and I want to Play it back at 300 fps. I want to basically speed up the video. Msu has a Plugin which does the opposite or slow down the video as slow motion effect. This is all I want to do lol. Thanks |
|
| evropej |
| Posted: Mar 29 2011, 02:55 AM |
|
|
Advanced Member
Group: Members
Posts: 514
Member No.: 26523
Joined: 28-November 09
|
This is baffling me.
So, I played back a video at 300 FPS and captured it using camtasia.
Go into file information and it tells me its 30 FPS video.
Sweet, so now I can play back on vdub at 300 FPS again to really speed it up.
The great surprise, it plays only at the rate it was originally recorded.
Seriously, what is going here?
http://www.evropej.com/renia.zip
 |
|
| phaeron |
| Posted: Apr 3 2011, 12:19 AM |
|
|
Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
|
It's a bit of a tall order to expect an HD file to play back at 10x normal speed, particularly without hardware acceleration. My quad core Core i7 definitely wasn't up to it.
|
|
| evropej |
| Posted: Apr 3 2011, 04:04 AM |
|
|
Advanced Member
Group: Members
Posts: 514
Member No.: 26523
Joined: 28-November 09
|
I am not interested in the playback if i can just produce the results shown on the video.
I wanted to play a video, like the one shown, at much higher speed.
Thats all.
Any suggestion on how to proceed would be appreciated.
The method I cam currently using is to play a video in vdub at 10x and capture the output with a second program.
|
|
| ale5000 |
| Posted: Apr 3 2011, 10:57 AM |
|
|
Advanced Member
Group: Members
Posts: 1114
Member No.: 22180
Joined: 30-September 07
|
You can use "Decimate by" in addition to "Change frame rate" so it will speed up the video without get a frame rate too high.
--------------------
New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
|
