Help with multidecimate

Support for my Avisynth filters
Ben
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Joined: Wed Jun 05, 2013 1:33 pm

Help with multidecimate

Post by Ben » Wed Jun 05, 2013 4:01 pm

I am using a mpeg4 .avi file (of auto license plates – LPs) from a Honeywell DVR to feed into a program that recognizes a full frame with the LP in it and a blow-up of the LP in a smaller frame and gives these with a copy of the Date and Time stamp. The mpeg4 is recorded by motion sensing of the Honeywell DVR and has a one second pre and post motion sequence automatically inserted with every LP sequence. I would like to remove the pre and post recording which includes no pertinent information. I have tried motion detection software to save only the sequence with the auto and LP but I have been unable to find a program that captures all of the motion frames.

I am able to accomplish this with multidecimate with avisynth and am saving it as an mpeg4 .avi file. With the original mpeg4 file obtained from the Honeywell DVR, +/- 5% more LPs are captured than when using the multidecimate file. I assume that this is related to loss of resolution by the additional conversion to YUY2 and back to mpeg4. Does anyone have any suggest to solve this problem?

Thanks!

Ben

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admin
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Re: Help with multidecimate

Post by admin » Fri Jun 07, 2013 7:33 am

Your description is not sufficient to enable me to help you.

I can help if you provide an unprocessed source video sample and a statement of exactly how you wish to transform it.

Ben
Posts: 13
Joined: Wed Jun 05, 2013 1:33 pm

Re: Help with multidecimate

Post by Ben » Fri Jun 07, 2013 9:47 am

What information do you need?

I have attached an mpeg4 .avi clip.

I want to remove all of the blank frames before and after the frames that contain vehicular motion.

Thanks for your help!

Ben

Ben
Posts: 13
Joined: Wed Jun 05, 2013 1:33 pm

Re: Help with multidecimate

Post by Ben » Fri Jun 07, 2013 10:12 am

The last post did not upload the attachment.

Here is another try.

Ben

Ben
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Joined: Wed Jun 05, 2013 1:33 pm

Re: Help with multidecimate

Post by Ben » Fri Jun 07, 2013 10:14 am

I have tried three times to upload a file without success. Is there some secret?

Ben

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Re: Help with multidecimate

Post by admin » Fri Jun 07, 2013 11:15 am

Use mediafire.com and post the link here.

Ben
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Joined: Wed Jun 05, 2013 1:33 pm

Re: Help with multidecimate

Post by Ben » Fri Jun 07, 2013 12:35 pm


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Re: Help with multidecimate

Post by admin » Fri Jun 07, 2013 4:36 pm

I can't open FFDS in VirtualDub. Please use the native stream or a common video codec such as HUFYUV. Thank you.

Ben
Posts: 13
Joined: Wed Jun 05, 2013 1:33 pm

Re: Help with multidecimate

Post by Ben » Fri Jun 07, 2013 8:48 pm

The hufyuv is too large to upload. Can you use x264 lossless?

The file I uploaded was a mpeg4.

Ben

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Re: Help with multidecimate

Post by admin » Fri Jun 07, 2013 8:51 pm

Can't you get an MPG out of that camera, instead of AVI? I can't tell you in advance if I will be able to play any AVI, unless it is Xvid, Divx, or HUFYUV. I regret that I don't have time to jump through hoops to help you, so please make it easy.

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