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JackReacher said:What exactly do you mean by upmix? Will all the channels be filled with whatever is in L and R?
JackReacher said:Is there a way to get a multichannel .wav that has the other channels muted (stereo source) so that it can be joined to the BluRay audio?
It's just the color conversion confuses me, when do you go to RGB, when do you go back to yuv?
JackReacher said:What audio format should I use for multichannel audio in VirtualDub?
I want to do something like this:
1) Convert DTS HD from BluRay to single multichannel lossless file that VirtualDub will be able to trim/splice.
2) Convert stereo AC3 from extended DVD to mono L/R lossless files. Create muted mono files (not sure how to do this) for the other channels. Save as single lossless file compatible with multichannel BluRay lossless file that VirtualDub will be able to trim/splice.
It's nothing to do with VirtualDub. If you use AviSynth, it does all the work: decodes the video/audio; trims and splices it together; etc. All VirtualDub does is render your project at the end (in the same way in which you might otherwise render an AVI to import into an NLE).
You can call a wide range of decoders with AviSynth. In other words, file format doesn't matter as much when using AviSynth as it does when you use a conventional, GUI-based NLE. What I do is decode the DTS-HD MA with eac3to and output a multi-channel w64 file that I call with NicRaWavSource().
JackReacher said:I know but in the case of TV footage that has 256kbps audio, how can upmixing ever end up sounding good especially next to DTS HD audio? It will sound obvious that it is an edit just on that basis. And whatever filters used in the upmixing might make it sound even worse and echo-ey
JackReacher said:If the video will end up being YUV anyway, would it not defeat the purpose of correcting color in RGB?
JackReacher said:Also when performing color space conversion, is the conversion process lossless?
Do you have code for upmixing? I read all the threads with upmixing and I really don't know which one to go for. I also don't have a system to test it on. Bear in mind that it is a TV capture so it's probably not healthy. I am willing to give it a try now since the deleted scenes are 4:3 and the BluRay is 16:9 so now I don't wanna have a double fail lol!256kbps is a very healthy bitrate for 2.0. It should upmix well enough. Upmixing a small section will sound far less jarring than cutting back and forth between 2.0 and 5.1, which as far as I'm concerned is the audio equivalent of chopping back and forth between aspect ratios – an instant fail.
No, but if you do it right, the quality remains very good. And fanediting is a process in which capable editors:
- accept a little quality loss for the not inconsiderable gain of having films the way they want them;
- use their technical skills to minimize the loss so that their viewers readily accept it (and barely notice it).
JackReacher said:Do you have code for upmixing?
JackReacher said:Since the two differ in Colorimetry, do I have to convert the DVD to .709?
don't happy, be worry?
fl=WavSource("L.wav") fr=WavSource("R.wav") c=WavSource("C.wav") lfe=WavSource("LFE.wav") sl=WavSource("SL.wav") sr=WavSource("SR.wav") MergeChannels(fl,fr,c,lfe,sl,sr)