Why does NeroVision transcode an MPEG2?

[rochkind]

I produce a DVD-compatible MPEG2 with TMPGEnc, but still NeroVision goes through a pass that it calls "transcoding."

Does anyone know what it is actually doing? Is it merely checking the validity of the MPEG2, or is it actually changing anything?

(I wouldn't use NeroVision at all, but it came with my burner. I thought I'd try to find out what it's doing before I dump it.)

Thanks!

[yoda313]

Hello,

Have you tried it with any other dvd authoring package??? It shouldn't do anything to it if its dvd compatible

A good program to try would be ulead dvd movie factory or tmpgenc dvd author. Both are quite excellent and versatile

Kevin

[rochkind]

Yes... those are among the ones I plan to try. But first I want to find out what NV is actually doing, if anyone knows.

[mats.hogberg]

Dump it. Use a real authoring app. I'm sure there's some checkbox to check (or uncheck) somewhere to turn off "compliance check" (what Nero considers compliant is another matter completely!), but if your mpeg is DVD compliant, Nero shouldn't touch it.

/Mats

[Razz]

NeroVision Express 3 will only transcode a compliant MPEG2 stream if you ask it to lower the quality. For example, if you try to put 10GB of video on a single sided (4.7GB) DVD, obviously in order to make it fit, NVE3 will have to compress (transcode) it, and you'll notice that it will work slow and hard in the transcoding process. However, if you have an hour of the same high quality video, and you set NVE3 quality setting to "Automatic" or "High Quality", NVE3 won't transcode it. NVE3 does go through a step that it displays as "Transcoding". I think that they call it "transcoding" because it's a convenient one-size-fits-all message that is always displayed, whether or not any real transcoding is happening. Arguably, I guess since NVE3 may have to mend the ends of the edited MPEG2 clips, and weave in any chapter marks and transitions and whatnot, it could reasonably be considered transcoding. You'll notice that NVE3 will slow down at the transitions, but it will fly through the body of the MPEG2 clips, which indicates that no transcoding work is being done. When you force NVE3 to transcode an MPEG2 clip to a lower resolution, you'll see it slowly grind through the compute-intensive transcoding process throughout the body of the MPEG2 clip.

[Hyper Shinchan]

You have to check the smart encoding box, with this the video shouldn't be transcoded, if it's complaince with the DVD settings NVE3 shouldn't touch the video (but it will transcode the audio, with TMPGEnc the audio is in MP2, if you haven't purchase the AC3 plugin, NVE use only AC3 and PCM).
If you haven't understood something tell me about it .