shaky playback! :?

[baz2121]

Hi!!

I recently downloaded a movie, and when i try to play it back using Windows media player, it plays back shaky (the whole picture shakes and shivers every couple of seconds), almost like it's playing back each frame twice but it isn't (if that even makes sense).

This of course carried over into through the encoding process and gave the same buggered-up MPG.

This has happened before, but i restarted the computer and it cleared up, but this time it won't go away!!

HELP!!! (the site i downloaded the movie from is a BitTorrent site if that helps!)

Thanx guys!
ciao, baz

[au7usa]

Videos will sometimes play that way when they have been encoded with the field order reversed.

Open in VirtualDub and use arrow keys to advance 1 frame at a time. Does the action seem to reverse itself?

[baz2121]

yeah it seems to play fine in VirtualDub, how can i re-encode wtih the correct field order?

Thanx again
baz

[au7usa]

If the field order was incorrect it should play poorly in VirtualDub. Every frame of interlaced video has two fields. Sometimes the two fields of a frame represent the same point in time, and sometimes the two fields represent different points in time.

The same way that different frames represent different points in time.

If you open the file in VirtualDub and use the arrow keys to advance one frame at a time you can see things moving ahead for a few frames, then suddenly reverse, then proceed normally. If your not seeing this, there must be something else wrong with your file.

You should use something like GSpot to identify the codec that made this file, and then make sure you have that codec installed. Sometimes files will be played back with the wrong decoder when the right one isn't present.

There, now i've completely worn out the word "sometimes"........i hope your happy!

[holistic]

.....the site i downloaded the movie from is a BitTorrent site if that helps!...

Why don't I get told anything......why am I the last to know.....I don't understand why I need to buy my movies anymore....bit torrent you say !

[baz2121]

OK, in VirtualDub i played it frame by frame, and it plays normally, so i ran GSpot, and it says that the codec is an Xvid codec and that i have 4 compatible codecs (Xvid MPEG-4, Xvid decoder, and a couple of DivX decoder filters).

i heard somewhere that GSpot can repair shaky/jittery files, is that true? otherwise i dont know what the hell is goin on short of gettin one of u guys to come down to my place and fix this thing, im gonna pull out all my hair LOL

and for HOLISTIC: the site for the bit torrent app is suprnova.org

thanx again
baz

[holistic]

That was sarcasm ...but thanks for caring.

[enaby]

Does someone know how to fix this problem i have the same issue but have correct xvid codec installed

TIA

[monzie]

Try playing the file with the vlc media palyer (videolan..its in the TOOLs section) as this has 'cured' a lot of problems that I was getting with xvid's, although I tried everything to cure the problem (FourCC changer, different xvid releases/builds, ffdshow settings).
My usual player was zplayer or TCMP but neither could play some NEW xvids correctly ...sort of a dropped frame/jerky/strobe effect (like only 20fps was playing in the timespace for the full framerate)............I think it must be to do with directshow as vlc bypasses it doesnt it? And yes there was no detectable problem in GSpot or Vdub.

hth

[monzie]

Out of curiosity has anyone got to the bottom of this problem yet?

I know my 'fix' works (at least for me) but its not a true fix is it?

Anyone got any more info?

[ada.k]

When i was having this problem, i simply removed all codecs including ffdshow and all codec packs. Download and installed the koepi XVID codec. My problems then when away. I also always use DVD2SVCD to encode, i find this removes the possibilities of user input errors!

Since i have done this i have never had a problem with playing encodes on PC and converting to DVD