Video Transition edges slightly distorted...

[jweathers7]

Hi,

I've re-edited a video to reinsert some deleted material. As part of that process, I created some transition sequences that are usually about 28 - 40 frames in length. These transitions were created by converting small portions of the source material as follows:
VOB Clip -> AVI -> Sequence of BMP files

I then created my transition frames, created an AVI from them and then encoded the AVI as MPEG2 clips with the HC encoder. Finally, these transitions along with the rest of the film and the deleted scenes are joined back together.

When I view the resulting video on my hard drive both as a raw MPEG2 file, as an authored DVD files folder, or as a burned DVD everything looks great. However, when I watch the resulting DVD on my TV, the beginning and end of the transitions experience a very brief flickering ripple that I don't see on my computer monitor (maybe because its a lot smaller than my widescreen TV).

Does anyone have any idea what could be causing this effect?

[Mug Funky]

were the fades interlaced? if so, were they in top-field first or bottom-field first?

most likely (from your description) the transitions are in a different field order to the footage you used. just re-render in a different field order, or if your footage is progressive (save for the transitions of course), you can simply ReStream the m2v file and set the opposite field order to whatever it shows.

[jweathers7]

Thanks for the reply. I'll try doing what you suggested. Here's some more information though as I'm puzzled how my footage would not all be progressive. The sources are the main film Attack of the Clones on DVD and the deleted scenes from that film on its second disc. Both are considered film by my programs that examine them like DGIndex.

To create my transitions, I would extract small VOB clips around the parts that I wanted to create transitions with using Womble MPEG Video Wizard. Then, I used DGIndex together with VirtualDub to extract the individual image frames from the video. I used the "Ignore Flags" setting so that no pulldown was performed and thus, I only received the directly encoded images.

Then, I performed my edits on the images and strung them together as a 23.976 fps AVI which I then encoded to an M2V with HC Encoder. Finally, I used DGPulldown to apply pulldown on the M2V file to make it into a 29.97 fps clip that I then used with the rest of my materials in Womble to create a final VOB file.

Is there some step there that sounds like it could have introduced the field order reversal that you described?

Thanks so much for the help! :thanks:

[jweathers7]

OK. So I think I know pretty certainly what is causing the problem, but I'm not sure how it was created or how to fix it.

When I open up the original source for the "Left" part of the transition, DGIndex says that it is:
Video Type=Film
Frame Type=Progressive
Colorimetry=SMPTE 170M

I get the same thing for the original source for the "Right" part of the transition. However, after I created my Transition video and then test it with
DGIndex, I find instead:
Video Type=Film
Frame Type=Interlaced
Colorimetry=ITU-R BT.709

I am creating the video from a BMP sequence by loading it into VirtualDub and creating an AVI with no compression, 24-bit RGB color, 23.976 fps. I then use HC encoder to create my M2V file. The interlace checkbox is left unchecked. My AVS file for HC encoder merely uses ConvertToYV12 with interlaced set to false because the encoder complains if I leave the AVI in its regular color format. So how can I create an M2V that will register as Progressive and with the SMPTE 170M colorimetry (whatever that means)? Finally, I performed a pulldown with pulldown.exe which seems to be the "problem" because DGIndex indicates that before pulldown the video is progressive.