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| evropej |
| Posted: Mar 22 2011, 12:07 AM |
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Change frame rate to (FPS)
What is the maximum number here?
I find that after 300, there seems to have no effect for me.
v1.10
thanks |
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| stephanV |
| Posted: Mar 22 2011, 08:48 AM |
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The highest frame rate in AVI would be FFFFFFFF/00000001 which is 2^32/1 fps. The reason why you don't see an effect higher than 300 fps can be due to CPU or drive speed limitations.
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| evropej |
| Posted: Mar 22 2011, 07:42 PM |
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You bring up a good point so I did a little test.
I am running core i7 at 4.14GHz and I have an SSD at 295/285 MB transfer rates.
I was watching the load usage and it never seemed to peg any core at any time.
The average load at 400 FPS for example was about 50%.
I am not sure how to measure the transfer rate on the SSD though for a single thread or application.
Side note, should the software play frames rates outside the LCD display capabilities or in fact the capability of the eyes?
How do I export the file then with this frame rate?
I tried saving the file but I am not sure if the media players are handling this issue correctly. |
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| stephanV |
| Posted: Mar 23 2011, 08:05 AM |
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You can see the average bitrate in the new file in VirtualDubs file information. That will give you an indication if it is out of your harddrive's spec.
| QUOTE | | Side note, should the software play frames rates outside the LCD display capabilities |
If you have a 60 Hz monitor and you have a 300 fps file, normally the display will only show 1 out of 5 frames.
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| evropej |
| Posted: Mar 23 2011, 01:33 PM |
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Thanks for the suggestion, I will try that when I get home.
I guess my question was why bother rendering all the frames?
Why not convert it to an equivalent 30FPS video?
Or am I missing something. |
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| stephanV |
| Posted: Mar 23 2011, 03:36 PM |
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Spam killer ;)
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| QUOTE | I guess my question was why bother rendering all the frames?
Why not convert it to an equivalent 30FPS video?
Or am I missing something. |
For non-keyframe only files this is not possible because a delta frame depends on all previous frame up to the first previous key frame to be decoded.
Of course, you can always enforce this yourself by using VirtualDub's decimation options if you don't mind losing frames in the resulting file and re-encoding it.
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| evropej |
| Posted: Mar 23 2011, 05:34 PM |
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I tried the suggestion with negative results.
So how can a TV play these files?
I tried uploading to facebook with errors.
The work around right now is to capture the video with Camtasia at 30FPS.
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| stephanV |
| Posted: Mar 23 2011, 05:58 PM |
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Spam killer ;)
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I don't know what "negative results" are, or what you tried. 
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| evropej |
| Posted: Mar 24 2011, 06:23 PM |
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I tried to decimate the video but the result was choppy.
I think the best thing now is just to capture the video output from vdub with a capture software.
I was hoping to eliminate this step but I dont an answer at this time. |
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| ale5000 |
| Posted: Mar 24 2011, 06:45 PM |
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VirtualDub is also a capture software, you can use it directly.
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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 |
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| evropej |
| Posted: Mar 25 2011, 03:59 AM |
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I dont have much luck doing captures with vdub.
I was hoping for someone to explain how to convert things the right way so a newbie like me can understand.
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| stephanV |
| Posted: Mar 25 2011, 08:00 AM |
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| QUOTE (evropej @ Mar 24 2011, 07:23 PM) | | I tried to decimate the video but the result was choppy. |
Are you using Direct Stream Copy with an already compressed stream?
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| evropej |
| Posted: Mar 25 2011, 01:27 PM |
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No direct stream copy, I was using xvid compression.
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| stephanV |
| Posted: Mar 25 2011, 02:11 PM |
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Spam killer ;)
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That is strange. Works fine here.
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useful links:
VirtualDub, Input plugins and filters, AviSynth, AVI-Mux GUI, AC3ACM by fcchandler, VirtualDub FAQ |
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| evropej |
| Posted: Mar 26 2011, 07:59 PM |
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Max data rate is 87MB/S which is not even close to what the SSD can do.
I tried with new xvid or and camtasia compression and I still get a horrible output file.
Anyone have any suggestions here on how to bypass this? |
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