Problems with Donald Graft’s Smart Bob filter

Leica Man · 17th February 2002, 08:06

Hi all,

Please help!

I have tried many different methods of transferring my home videos onto Divx. I have tried many deinterlacing filters, the best one I find by Donald Graft and his smart deinterlace filter.

However the video is always unsmooth and jerky. The simple fact is that going from 60 fields a second to 30 frames a second causes loss of smoothness. So I tried converting 60 fields a second to 60 frames a second.

The results I got at 60 frames per second were amazing. The motion was silky smooth. It was like watching video on a high quality NTSC monitor, if not better.

This is how I did it. Basically I used the instructions from the web site of Donald Graft’s “smart bob” filter. I created an AVISynth script file:-

clip=AVISource(“c:\file.avi”)
clip.SeperateFields

I then opened this file in Virtual Dub and I applied the “smart bob” filter to it and then saved the file. After that I reseized it, compressed it, etc. The end result was a silky smooth file at 59.94 frames per second.

Anyway my problem is this. If I do this on a small file of say 30-60 seconds, then all is well. However if I do this on a large file of say 10 minutes then Virtual Dub crashes. It crashes right at the end when it is about to finish the job, as shown in the status window.

I further found out that the exact limit is not in time but the resulting file size. If the output file is less than 2GB then all is well. Anything over and Virtual Dub crashes.

I am using Windows XP and I have plenty of memory and hard drive space. All my partitions are NTFS. I am using verision 1.4.8 of Virtual Dub and version 1.05 of AVISynth. I tried 1.04 of AVISynth and the same results happen. The version of the smart bob filter is 1.1 beta 2.

Anyway can someone PLEASE help me with what I am doing wrong?

Or is there ANY other way using any other software in reaching my goal, which is to convert my home videos to Divx format at a frame rate of 59.94 fps?

I am intent on 59.94 fps, as it offers amazing smoothness and fluidity of motion.

Thank you very much!

17th February 2002, 08:06	#1 \| Link
Leica Man Registered User Join Date: Jan 2002 Posts: 9	Problems with Donald Graft’s Smart Bob filter Hi all, Please help! I have tried many different methods of transferring my home videos onto Divx. I have tried many deinterlacing filters, the best one I find by Donald Graft and his smart deinterlace filter. However the video is always unsmooth and jerky. The simple fact is that going from 60 fields a second to 30 frames a second causes loss of smoothness. So I tried converting 60 fields a second to 60 frames a second. The results I got at 60 frames per second were amazing. The motion was silky smooth. It was like watching video on a high quality NTSC monitor, if not better. This is how I did it. Basically I used the instructions from the web site of Donald Graft’s “smart bob” filter. I created an AVISynth script file:- clip=AVISource(“c:\file.avi”) clip.SeperateFields I then opened this file in Virtual Dub and I applied the “smart bob” filter to it and then saved the file. After that I reseized it, compressed it, etc. The end result was a silky smooth file at 59.94 frames per second. Anyway my problem is this. If I do this on a small file of say 30-60 seconds, then all is well. However if I do this on a large file of say 10 minutes then Virtual Dub crashes. It crashes right at the end when it is about to finish the job, as shown in the status window. I further found out that the exact limit is not in time but the resulting file size. If the output file is less than 2GB then all is well. Anything over and Virtual Dub crashes. I am using Windows XP and I have plenty of memory and hard drive space. All my partitions are NTFS. I am using verision 1.4.8 of Virtual Dub and version 1.05 of AVISynth. I tried 1.04 of AVISynth and the same results happen. The version of the smart bob filter is 1.1 beta 2. Anyway can someone PLEASE help me with what I am doing wrong? Or is there ANY other way using any other software in reaching my goal, which is to convert my home videos to Divx format at a frame rate of 59.94 fps? I am intent on 59.94 fps, as it offers amazing smoothness and fluidity of motion. Thank you very much!