Interlaced Motion Problem

[DSP8000]

Hi guys,

while swapping my dv codecs something happend to the video & now I can't fix it unless I re do the whole edit process.I do not want to do that because it is pain in the but to go all over the effects, etc...

If someone can help it would be greatly appreciated.

Here is the link for the short TEST_FILE (http://members.iinet.com.au/~isdmultimedia/files/TEST_FILE.avi)
Tnx. upfront.

DSP8000

[Pookie]

Enable Huffyuv decoding in ffdshow - that's what I had to do to get your clip to play. I'm guessing you installed Huffyuv 2.1 or 2.2, which doesn't seem to decode AVIs made with the ffdshow version of Huffy (there's a reason for that posted around here, can't remember what it was)

[DSP8000]

I've got hyffyuv enabled in ffdshow, this is normal encode not with the adaptive huffman tables. I don't think that is the problem.
Thank you for having a look at it :). Deinterlacing the clip helps, but that is not my intention. To my eyes, it looks like one of the fields is lagging behind, blending & reinterlacing did not help as well.
Any other suggestion is welcome.

[davidhorman]

Could you explain what you think is wrong with the footage? It looks fine to me. However, I used VLC to write it to an image sequence rather than using ffdshow (which I uninstalled after it caused me some trouble).

David

[foxyshadis]

Mmm, it looks okay as long as you don't use AssumeTFF. I just separatefields() and it looks fine, ignoring the minor field-jitter.

OT: Corny grin + Two thumbs up invariably means something youtube-worthy is about to go down, possibly ending in a hospital trip. =D

[DSP8000]

Mmm, it looks okay as long as you don't use AssumeTFF.

Of Course not, it is PAL DV Source BFF.

minor field-jitter

That is my problem, would you know what caused it or how to fix it?
I'm doing short test DVD now to see how will look on TV.
Tnx.

[foxyshadis]

The fix is to convolute the odd field up a half a line to match the even field, but you don't need to fix field jitter. It's just part of how interlacing works, because even and odd fields are offset by a line. If both fields were even, the separatefields would look fine but on a TV the picture would appear very aliased, and wobble up and down one line, 30 times a second. You can test this by deinterlacing-by-field-doubling or the convolution. (Virtualdub has this option, in avisynth it'd be interleave(even,even).weave() instead of the normal even,odd.)

[DSP8000]

Tnx. foxyshadis,

I know how interlacing works, funny thing is that every other part of the video(not the sample provided here) is just fine & the interlacing jitter is not as visible as on this sample. Something happend ... hmmm
I did a short test DVD to view on my TV and you're right, no need to fix it, just on some slow motion parts I can see strobing. That is not happening with the rest of the video.

I did test with bobbing and halfing the framerate to 25FPS and that fixed it, but as I stated before I do not want to go that way.

I remember there was a similar situation with anime source but I can't find the thread. If someone can find that thread please post a link.