It's transcoding unfortunately. I have yet to see encode acceleration...I don't know if it's even possible though. What I'd like is to be able to take some HD-DVDs I have and encode them into H264 or something similar with GPU acceleration.
Huh? Uncompressed AVIs convert just fine with Espresso MediaShow using ATi Stream. I got some HD-DVD I might try converting also, but there already compressed so your just transcoding anyway.
What about the people who are sitting on something older than GT200 and 4XXX? I think anyone who is looking for an upgrade will consider the new cards regardless of DX11 if price/performance is right.
Did people wait for DX10 games before jumping on the G80 when it was launched? The success of next gen cards wont be primarily driven by DX11, but rather how well it performs compared to current HW, and how competitively it's priced.
http://xtreview.com/addcomment...MPGEnc-4.0-Xpress.html
I just saw this...it SLOWS down the process? wth? Hopefully that problem has been fixed.
Can it really take the evob files from a HD-DVD and encode them? If so I'd definitely be interested in doing that.
Or would converting the evob files to something with very little compression then using Espresso to compress further work? Would the quality be fairly high relative to a regular CPU encode?
nitromullet
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- Jan 7, 2004
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...a little off topic, but I found the gold plaque from TSMC commemorating the partnership between AMD and TSMC on getting out the first 40nm/DX11 chip out the door interesting. I think it might lend some credibility to what Charlie has been saying about NVIDIA throwing TSMC under the bus during the whole G84 and G86 fiasco. While I doubt that TSMC would ever do anything to affect NVIDIA's production (which would hurt TSMC's bottom line as well), they might have wanted to send the message that they weren't pleased with the way NVIDIA handled that situation.
It's joint advertising for both parties involved. Had NV been on a timetable to have DX11 wafers reach the end of the line before computex and not AMD then you can bet TSMC would have made hay over their 40nm process by presenting NV a token wafer trophy too.
nitromullet
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- Jan 7, 2004
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I see that too... So, you think I'm reading too much into it? it just seems that some big things are converging against NVIDIA with regards to Win 7. First Win 7 Aero takes advantage of DX10.1, which NV doesn't currently support. Then you have ATI coming out with the first DX11 silicon. I know that NVIDIA is a pretty aggressive player, and it just sort of seems that they may have burned a few bridges along the way. Whereas, AMD (the ATI division at least) seems to be the industry's darling right now.
A little, only the part about it being a side-effort to poke NV a little bit. TSMC won't use politics like that to deal with PR and $ topics...they are quite the cool customer in that regard and whatever they feel NV has done to harm them perception-wise or actual $-wise will come back to NV in the negotiating room for future contracts.
They won't play it out in the PR realm (its not their business culture/mentality), which is what this wafer deal is all about.
Everything else I agree with, but there is a lot of time yet between now and the end of the year so I wouldn't try and piece together a picture just yet. I'm gonna wait for a rotund female to sing first before I count Jensen out of the picture for 2009.
It can't take evob files, but you should be able to remux it to a format that is supported. Currently the biggest problem I'm having is there's not detelecine options for DVD conversions, so I have to remux the file without the pulldown then transcode. The quality is the same as a regular CPU encode, but this application is still very limited in options compared to other programs.
Sorry I was using the wrong terminology. What I mean is something like video straight from a HD-DVD (which is somewhat compressed already) and encoded to something like H264. I have yet to see GPU acceleration for that. Do you know any programs that can do that?
The program I currently use is Ripbot264 and sometimes PS3Video9. It's free and it works but I have trouble getting 5.1 audio to work properly to stream through my PS3 and of course it takes a LONG time to encode.
Transcoding is converting from one compressed encoded format to another compressed encoded format.
Encoding is going from an uncompressed un-encoded format, to a compressed encoded format.
If you want to put some BR or Regular DVD on a media server or HTPC in a compressed format, thats encoding.
Currently I dont think either Nvidia or ATI has true hardware accelerated video encoding.
Um, with Badaboom, it converts DVDs to H264 using the GPU only. NV absolutely has true hardware accelerated encoding, even on their old G80 chips.
When you transcode a video that has already compressed, what you are doing is decompressing the video and encoding it into another format on-the-fly. Transcoding is actually harder than encoding because you need resources for the decoding part.
I'm a little
. BluRay and DVD both contain compressed video. DVD uses Mpeg2, and BluRay either Mpeg2, Mpeg4, or VC-1...@SickBeast: Transcoding is actually not that hard unless your source is an AVC coded BD, in this case a lot of time is spent on decoding the file or you are doing a lot of pre-processing on the video.
@soccerballtux:You don't want to fill your HTPC with simple ISO's of your DVD's and BD's(Blu ray discs won't run because of DRM) because of huge size ,you will want to compress them into smaller size(with almost negligible loss of quality using an AVC encoder ,x264 is best out there).Mpeg-2, mpeg4, VC-1 are all lossy codecs.
@soccerballtux:You don't want to fill your HTPC with simple ISO's of your DVD's and BD's(Blu ray discs won't run because of DRM) because of huge size ,you will want to compress them into smaller size(with almost negligible loss of quality using an AVC encoder ,x264 is best out there).Mpeg-2, mpeg4, VC-1 are all lossy codecs.
Depending on the formats involved, transcoding can be relatively simple.
Namely, you won't have to do a full decoding and recoding scheme. You can skip some parts. One example is that the colours are generally converted from RGB to a YUV 4:1:1 colourspace during encoding.
If both the source and the target format use the same colourspace encoding, you can skip the conversion to RGB and back again.
Audio can often be transferred 1:1 aswell, so you can skip that aswell.
There are other 'shortcuts' you can do when transcoding, by re-using already-encoded data.
Ofcourse, true encoding is rarely used anymore. Virtually all video capture devices use some kind of compressed format in order to keep the total filesize down for storage and convenience. So the actual encoding is often done inside the camera itself, before it is stored on the flashcard or whatever medium it uses. Uncompressed video, especially in HD formats, is just too big to handle.
For example, say you have 1920x1080 resolution, with 32-bit colours...
That's 4 bytes per pixel, and 2073600 pixels per frame. In other words, roughly 8 mb for a single frame.
Then say you use a framerate of 30 fps. That is close to 240 mb for every SECOND of video.
Namely, you won't have to do a full decoding and recoding scheme. You can skip some parts. One example is that the colours are generally converted from RGB to a YUV 4:1:1 colourspace during encoding.
If both the source and the target format use the same colourspace encoding, you can skip the conversion to RGB and back again.
Audio can often be transferred 1:1 aswell, so you can skip that aswell.
There are other 'shortcuts' you can do when transcoding, by re-using already-encoded data.
Ofcourse, true encoding is rarely used anymore. Virtually all video capture devices use some kind of compressed format in order to keep the total filesize down for storage and convenience. So the actual encoding is often done inside the camera itself, before it is stored on the flashcard or whatever medium it uses. Uncompressed video, especially in HD formats, is just too big to handle.
For example, say you have 1920x1080 resolution, with 32-bit colours...
That's 4 bytes per pixel, and 2073600 pixels per frame. In other words, roughly 8 mb for a single frame.
Then say you use a framerate of 30 fps. That is close to 240 mb for every SECOND of video.
What do you mean?
I'm talking about encoding as in going from a raw, unencoded format to an encoded format.
That's rarely used, because we rarely use devices that output raw video data. It's nearly always compressed in some way. In which case you'd always be transcoding.
Ok,but saying going from a lossless format to lossy format would be more correct as even raw data has to be encoded in some way.
I disagree.
I think if you say that raw data is encoded, you are mixing different levels of abstraction.
Yes, obviously all data is encoded as bits, and in turn these bits are encoded in electrical/magnetic/etc signals representing high and low... and whatnot.
But that holds true for ANY data, it's just a basic requirement for any information to be stored on a computer.
Raw data in this sense is basically data that requires no additional processing to display, so raw framebuffer dumps, so to say.
Aside from that, a lossless format may still be compressed or encrypted, and as such still requires decoding before it can be re-encoded to another format. So even with lossless formats you would be doing transcoding.
So what you are saying is not more correct.
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