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21st October 2004, 02:21 | #21 | Link |
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Chainmax:
Yes I will write with more then just BeSweet and ffdshow in mind , but I believe that you will have to first output to wave. Then from there take the wave and input it into something like Surcode. Unless someone has devised a DirectShow filter to implement Surcode's AC3 Encoding. ahgc: Yes, AC3Filter works very nicely. This guide was written with AC3Filter in mind at the very first revision. It was shortly changed thereafter, due to channel swapping complications as well as lack of program revision. The only real difference that I would see a need to use ffdshow over AC3Filter is: the LFE sounds much better with ffdshow as well as ffdshow carries a multitude of different options-- such as: Resampling the audio to 48000 Khz on the fly and again if Channel Swapping was a necessity (as noted before, AC3Filter swaps channels improperly if an LFE is desired). Regards, Josh Last edited by joshbm; 21st October 2004 at 02:34. |
22nd October 2004, 02:41 | #22 | Link |
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Ok.. still struggling .. Here's the situation:
-> 2 Channel WAV - 135m41s - 1.33GB Running it through this process (either with ac3filter or ffdshow) I get -> 6 Channel WAV - 135m15s - 3.99GB -> that's 26 sec missing! But.. If I replace "WavDest+Filewriter" with "Dump" filter I get a 4.01GB file (not readable by player of course but most likely is complete with those 26 missing seconds) My question is if the "WavDest+Filewriter" filter combination has any filesize limits. Thx Regds, Antonio |
23rd October 2004, 03:12 | #23 | Link |
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Well after some testing here are my conclusions:
1. There is in fact some limitating factor concerning file size (destination). I believe it has to do either with WavDest filter or File Writer filter. 1.1. My solution was to split the source WAV into 2 and run them through graphedit separately. Then join them back toghether. Worked perfectly. 2. The resultant 6ch wav, when I run it through besweet to create the AC3, channels get swapped in some manner. But if I use the same besweet to separate the 6ch wav into 6 mono wav files, they come out correctly (filenames that is - C, LR, LF etc). 2.2 My solution is to use the tool on this thread by Amnon82, to use those six wav in the correct order, to mux them and create the new ac3! Hope my experiences help someone. If there are simpler solutions please feel free to post Regards, Antonio BTW: Found this great 6ch (wav and wma) on MS's site to test channels. It might be useful to most of us! Last edited by ahgc; 23rd October 2004 at 03:33. |
23rd October 2004, 20:31 | #24 | Link |
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Thanks for the post! I have a question, why not use ffdshow to channel swap? What channels are getting "mixed up"?
PS- I was also thinking that I'm glad ffdshow will soon support direct real-time AC3 encoding to a file-- because then you will not have to worry about the size of the file (you will also not have to use WavDest). Regards, Josh Last edited by joshbm; 24th October 2004 at 04:15. |
24th October 2004, 23:31 | #25 | Link |
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Yes, I am also anxiously waiting fot that feature!
About using ffdshow to do the channel swapping. It still didn't sound quite right on the output to me. But that was most likely due to some mistake I made. I believe the channels that came out swapped were FR<->C , SR<->LFE and SL seamed to disappear. But I didn't do very extensive testing on this, so I am not quite sure on the accuracy of what I just said. Regds Antonio |
25th October 2004, 19:36 | #28 | Link | |
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Re: Guide: Stereo to 5.1 upmix using DPLII (2nd Ed.)
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For more information on these settings, you can check out Dolby Surround Pro Logic II Decoder Principles of Operation. The Dolby Technical Library has several other informative articles. Regards, Steve. |
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25th October 2004, 20:28 | #30 | Link | |
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26th October 2004, 06:11 | #32 | Link |
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Well I was looking for other upmix filters since both I've tried have these problems known to most of us:
- Cyberlink PowerDVD's filter only allows DPL I upmix (rear channels come out the same); - Intervideo WinDVD's filter chops off one second or two at the beggining of the stream; Any other filter that allows DPLII upmix? Regds Antonio |
27th October 2004, 05:39 | #34 | Link |
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[editet - it was an unreadable mess]
Thx for the reply josh. So here's the problem after I looked into this closely. The filter doesn't appear to actually "shorten" source's duration, but it "mutes" first second and a half (?) of it on the output. So to perform what you suggested I would have to know that exact "mute" time, and then on the output 6ch wav remove the exact same time from the beggining. Of course experiments are always an option but very time consuming Regds Antonio Last edited by ahgc; 27th October 2004 at 05:50. |
27th October 2004, 21:52 | #35 | Link |
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Did some testing and came out somewhat confused.
Here is the results I received: Input: 30.00 second, stereo wav (1000 Khz Sine pitch) Output: 29.7525 second, 6-channel wav (1000 Khz Sine pitch), 1.5 seconds *almost exactly* (I am unsure if it is, breifly looked at it) at beginning was muted. Then a fade in was present (kinda weird). I saved the stereo.wav file I used as well as the Center output channel. I can post my results, I'll get back to you with more information. More testing to come. Regards, Josh |
27th October 2004, 23:39 | #36 | Link |
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I've done some other tests...
Test 1 Tones: 1 Input Length: 30.00 seconds Input Channels: 2 Output Length: 29.7525 seconds Output Channels: 6 Difference: 0.2475 seconds clipped off (where?) Muted: ~1.5 seconds ___________________________ Test 2 Tones: 2 Input Length: 60 seconds Input Channels: 2 Output Length: 59.7550 seconds Output Channels: 6 Difference: 0.245 seconds clipped off Muted: ~1.5 seconds You can easily see the mute and the fade in as well as the delay. ___________________________ Regards, Josh Last edited by joshbm; 28th October 2004 at 00:03. |
6th November 2004, 15:43 | #37 | Link |
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I couldn't get this method to work with the Intervideo files provided here. I'm running XP Sp2 just for the record.
The problem is that i cannot select the prologic II (nor even prologic I mode) in the Intervideo Filter properties tab (following all the procedures) as they stay grey. So i tried to use the (already) installed "Cyberlink Audio Effect" filter from Cyberlink's PowerDvd 5.0 . All the steps remained the same as in this guide (including channel swap), with exception made to final ac3 encode made with SoftEncode (a personal taste here). The results were great, so i thought sharing my experience. Thanks a lot for this guide and good encodings
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6th November 2004, 17:36 | #38 | Link |
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Make sure you double click register.bat when you download the InterVideo files. Also be sure not to delete the files or move them once you have registered them. If that does not work, download and install the trial version of InterVideo.
About CyberLink Audio Effect, it only upmixes to Dolby Prologic I, even though you have selected DPLII. The rear channels are exactly the same. PS- I am glad you have found this guide useful . Regards, Josh Last edited by joshbm; 6th November 2004 at 17:38. |
7th November 2004, 04:17 | #39 | Link | |
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20th November 2004, 06:43 | #40 | Link |
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This is kind of off topic but I got 20040828 of FFDSHOW and I cannot find Channel Swap on the list in FFDSHOW Audio Decorder properties. Version 20041012 won't work for me because after I installed that, whenever I open an AVI in Vdub or VdubMOD, I get an error like this:
Couldn't locate decompressor for format 'XVID'(unknown). Virtualdub requires a Video for Windows (VFW) compatible codec to decompress video. DirectShow codecs, such as those used by Windows Media Player, are not suitable. Only 'Direct Stream Copy' is available for this video. And yes, all my videos play fine in every other player. When installing FFDSHOW, I did check all the filters related to Virtualdub. The only thing I unchecked not to install was the documents. Version 20040828 makes AVI files work in Vdub but it does not have Channel Swap. For Versoin 20041012, I'm pretty sure it worked until I installed InterVideo DVD 6. I'm really sure of it! Right after I installed that, it wouldn't work in Vdub no more. Since you uploaded that ZIP file of filters, I uninstalled InterVideo. But it still won't work in Vdub. So I went to install a previous version and it worked. Any help is appreciated. Last edited by Sakuya; 20th November 2004 at 09:17. |
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