What is the difference between dv and mjpeg

I don't know if I'll ever run into that problem but it would be good to know the answer before it happens. It was possible to get it when exporting or fusing in earlier version of Liquid, and I think you can still get it when exporting if you tell it to I've not bothered checking on this in a while. In general, I've had no problem with other app's using stuff I've fused from Liquid 7 either, so it may in fact be a non-issue nowadays.

I see. It's something that might happen with an earlier version. I do use Liquid 7 now 7. To be safest, it sounds like maybe you should use Liquid 7. Hey, thanks for the thoughtful response. Sean, Yes, I played the file on the same computer on which I made it with Liquid. My other computer also has Liquid installed so playing it there won't make a difference as far as whether a Liquid codec is on the computer. I don't think having Liquid installed makes a difference in what we're talking about but your point is valid.

Sometimes a codec used by one program can be used by another but that isn't always the case. There is a codec installer with early versions of Liquid 7. Maybe running that would help your situation. You said Nero wouldn't handle a file you fused. Which program fused the file? Was that program installed on the machine with Nero? Liquid's fuse and maybe earlier programs' fuse is reported to be a copy operation so it might not change the AVI wrapper.

If that's a DV tape, it shoyldn't need to, but it may simple be doing so for unknown design reasons. DV is itself a complete format as well as a codec format. It even include audio. AVI is a generalized format that supports many codecs and DV is one of the codecs.

AVI includes audio. What I am wanting is to eliminate as much post-processing. I want to see just how the DV's compressed data gets decoded by other DV decoders, for example.

I can slice out exactly one frame without doing any video processing by just selecting which frame number I want zero starting reference , multiply by , and copy the next bytes. AnthonyR Distinguished. Apr 26, 0 18, 0. Look at the door for example its wider in the bottom, maybe the lines are some type of artifact because the image is being squeezed horizontally somehow, square pixels as oppossed to non square etc..

I looks like artifacts from the MPEG2-codec. They usually tend to go funny on areas which have largely the same colour. I would re-render them with a decent MPEG-2 renderer.

It might be Ulead and Pinnacle use the same one. Try the CCE-one. It has a gazillion parameters, where you can tune per frame, or time period a huge amount of parameters for your final output. You must log in or register to reply here. Graphics Cards 9 Oct 9, Post thread. Question Super giving me worse frames than a ? Started by Small-Change Oct 7, Replies: Graphics Cards. News Comments. Question msi 6gb only 1 fan spinning constantly Started by poliplay Today at PM Replies: Latest posts S.

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Oct 29, Question Another 6 pin psu to 8 pin video card question. The magnitude of spreading depends on the design of the digital filter. To really see the effect of this chroma filter or decimation I suggest that the same picture be compressed in multi-pass with and without the chroma information i.

Again, this is a lossy process because of the finite precision of the digital data. Note that many digital algorithms exist to compute the DCT. Some DCT algorithms emphasize precision at the expense of the speed of computation. The opposite is true also, for quicker if less accurate rendering. However, it is quite possible to compromise the DCT computation when implementing a software codec to give a flavor of speed at the expense of precision.

Not all DV codecs necessarily follow the Blue Book to the letter. Besides, the DV standard requests that the video stream be compressed on a frame basis, while most MJPEG codecs compress the video stream on a field basis. Because of the interlaced nature of a frame, the two merged fields may contain quite different information if the scene has any motion, and this gives rise to a problem when the pixel data are processed by DCT. The standard DCT will produce a lot of inflated AC coefficients related to the spurious high-frequency vertical detail caused by the differing interleaved fields which are very difficult to compress efficiently even with high quantization values.

To overcome this problem the DV standard make a provision for a new DCT "mode" which is fine tuned for this situation and doesn't produce inflated AC coefficients. However, the algorithms that choose the DCT modes during compression are not defined by the Blue Book specification, and are proprietary to the companies developing them.

Most algorithms use a motion estimation technique to determine which DCT mode to use. It is also quite possible to use a brute force technique: computing both DCT modes and using the one that gives the less inflated AC coefficients.