Flip DV files without recompressing?

[maestro]

I have numerous clips that were shot with an adaptor that inverted the image. Does anyone know of a way that I can flip the images losslessly?

Thanks
-Brandon

[deckard8]

Get VirtualDub 1.61 (latest)
Load dv file
Choose Filters
Choose 'flip horizontally' or 'flip vertically'
Save back > direct stream copy.

[deckard8]

Sorry - Got it wrong. You'll have to do a re-compress, not direct-stream copy - not what you're looking for I suppose.

[guns1inger]

The only way would be to flip it and frameserve to your mpeg encoder. That way the only recompression would be the encode for DVD.

If you can edit it upside down, then output as DVD compliant you get the same result.

[deckard8]

Or you could also re-compress, but use Huffyuv (lossless codec) which should result in no quality loss.

[guns1inger]

Could take a fair bit of disk space though

[Deekkeed]

Well, if these files are DVAVI that you are going to be making into DVD then you could just do the flip on final compression to mpg, but it they are Mpgs already then you are probably stuck recompressing.
not much help here.

Deek

[vhelp]

Actually, you have no choice.

But, if you must flip it, you have to use either
vdub or AVIsynth and frameserve it to your encoder.

Either way, the frameserving will decrease your color space
in that "phase", further encoding inside the encoder
will also decrease the colorspace. But that is normal.

Unfortunately, TMPG doesn't offer such filters. You
could have saved on a colorspace mangle

So, choke it up, and frameserve it

vdub will open Type 2 files (with the audio in tack) ..
(but with Type 1, the audio is removed)

-vhelp

[jimmalenko]

I'd use AVISynth to flip it on the fly then load the AVS file into your encoder.

[harmsway1976]

here's an even easier way. before you do anything find out what codec is used in the orignal file. use VirtualDubMod and load the file. choose Filters->Rotate. rotate it how you want and choose Save->Full Processing Mode and process it in the same codec it was made with. this will keep the video the same and save it with the changes.

[harmsway1976]

are these avi or mpeg?

[jimmalenko]

rotate it how you want and choose Save->Full Processing Mode and process it in the same codec it was made with. this will keep the video the same and save it with the changes.

I wouldn't do it this way - takes too much time and not necessary to re-encode unless you want to keep the files as DV-AVI, but whatever floats your boat I guess ...