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Official DVHSTool 2.1 Support Thread - Page 36  

post #1051 of 1297
Not unless you set the PCR offset.
post #1052 of 1297
Quote:
Originally posted by balazer
leszek1,

Can you tell me something about the algorithm that you use to convert a variable rate transport stream (with the nulls stripped) into a constant bit rate stream?
I do the simplest thing possible - I stuff all the null packets at the end of the PCR cycle with all data packets at the beginning:

DATA+PCR, DATA, ..., DATA, NULL, ..., NULL, DATA+PCR, DATA, ..., DATA, NULL, ...

Believe it or not this seems to work rather well even with HiPix.
post #1053 of 1297
Leszek,

Thanks for the suggestion. Unfortunately that method gave me the same audio dropouts as my previous method - spreading the relevant packets evenly though the PCR interval. But it gave me the idea to try putting the relevant packets at the beginning of the interval. It worked! If I have continued success with this method, then I can forget about recording the whole stream and instead just grab the program that I want.
post #1054 of 1297
Glad it worked for you. I'm not sure I follow as to what's different about what you're doing from what I'm doing? Isn't stuffing null packets at the end of the interval the same thing as stuffing relevant packets in the beginning?

Thanks,
Leszek
post #1055 of 1297
The output looks pretty much the same either way - you have a block of video & audio packets and then a block of null packets, repeating. The difference is where that block of null packets is inserted - or really, where the PCR packet goes - either before the block of nulls, or after it. I'm not really sure why that should make a difference, because the PCR packet contains video, not audio. (I was having audio problems) And as far as I can tell the HiPix doesn't care too much about the PCR values. But my results are clear: one way it worked correctly and the other way it didn't.
post #1056 of 1297
I just purchased a second JVC 30K VCR and am attempting to use it with my PC. I downloaded and installed the software but got some mixed results: restoring OTA seems to work fine. restore AVX-1 causes excessive audio and video jitter and archiving forces the VCR into standard mode so I can't transfers MyHD files from my PC to the tape.

I suppose the problems with the AVX-1 are expected, but what is causing the VCR to switch from HS mode into STD mode? I am using a real DVHS tape and it has worked flawlessly in my other VCR attached to my STB.

thanks,

John
post #1057 of 1297
Bump.
post #1058 of 1297
Try CAPdvhs (click on freesoft first).

Its UI lags behind DVHStool one, but it's been my experience that it works when DVHStool does not.
post #1059 of 1297
Does CAPdvhs use the same capture filters as DVHSTool? For example, if DVHSTool 2.13 or 2.2 is already installed, will CAPdvhs use those filters and allow multiple file transport stream recordings?
post #1060 of 1297
I don't know for sure, but it seems that CAPdvhs is self-contained and does not use external filters.

It's not affected by the TSP2SP registry values for example.
post #1061 of 1297
CapDVHS is used for tape->PC only. This is self contained and does not use any filters. WrtDVHS is used for PC->tape only. This uses TSP2SP and will be affected by TSP2SP registry values.

Leszek
post #1062 of 1297
Quote:
Originally posted by leszek1
CapDVHS is used for tape->PC only. This is self contained and does not use any filters. WrtDVHS is used for PC->tape only. This uses TSP2SP and will be affected by TSP2SP registry values.
Thanks for the clarification.

If thought that WrtDVHS was not using TSP2SP, because I have some files without NULLs that DVHStool cannot dump back to tape without massive drops (despite a TSP2SP AutoRate value set to 1) while WrtDVS (the version embedded with CAPdvhs) has no problem.

I have no idea why!
post #1063 of 1297
What does the FireWire wiring diagram look like to use DVHSTool to RECORD from:

169Time Mod. RCA-DTC-100 >>> AVX-1 >>> DVHSTool - Windows XP>>>

Can this be done without a JVC 30/40K in the loop?

Also, what are the basic DVHSTool steps to capture the AVX-1 HDTV stream to disk?
post #1064 of 1297
Quote:
Originally posted by robena
Thanks for the clarification.

If thought that WrtDVHS was not using TSP2SP, because I have some files without NULLs that DVHStool cannot dump back to tape without massive drops (despite a TSP2SP AutoRate value set to 1) while WrtDVS (the version embedded with CAPdvhs) has no problem.

I have no idea why!
I don't get it either.

I've probably recorded at least 100 tapes of captures with null packets removed with the latest tsp2sp filter. There has only been a problem with one tape, and that was a mild lipsync problem with Minority Report. I've had a few other tapes have one or two brief audio dropouts when played on the JVC deck, but if that tape is restored there are no audio dropouts in the ts files. I've never had any video problems on any tape I have made.

I do the same thing you do Robert. I set AutoRate to 1 and turn compression off. It has worked exceptionally well for me when recording to a JVC 30K.

--Jerome
post #1065 of 1297
It's very easy to see whether TSP2SP is at fault or not. Create a filter graph in graphedit containing file source async, TSP2SP, and the VCR. If that has no problems, then the issue is with the program calling TSP2SP itself. (DVHSTool, WrtDVHS, etc.)
post #1066 of 1297
Leszek,
Jerome,
Now that we can capture HD from cable via firewire, is it possible to have DVHStool emulate a JVC recorder? I understand the Mac can do it-- why not XP? I'm trying to avoid the two-step (Moto 6200 to JVC to PC) and go direct (Moto 6200 to PC).
Thanks,
Spearse
post #1067 of 1297
Quote:
Originally posted by spearse
Leszek,
Jerome,
Now that we can capture HD from cable via firewire, is it possible to have DVHStool emulate a JVC recorder? I understand the Mac can do it-- why not XP? I'm trying to avoid the two-step (Moto 6200 to JVC to PC) and go direct (Moto 6200 to PC).
Thanks,
Spearse
Was thinking same thing. Could even use the playback functionality to monitor stream in realtime?

Tim
post #1068 of 1297
All of the firewire specific stuff lives in the driver. Until someone writes a new AV/C driver (like vividlogic's AV/C driver stack for their firebus PVR software) the answer is no.
post #1069 of 1297
hmmm...does anyone make a good mac emulator anymore?
post #1070 of 1297
Edit: never mind, should have clicked the url in opening post
post #1071 of 1297
Quote:
Originally posted by BenDover
hmmm...does anyone make a good mac emulator anymore?
Not an option, ever if there were. It's very hardware specific and performance/hardware oriented.

Tim
post #1072 of 1297
OK, I'll bite. How does one write an AV/C driver? Is such an effort underway? If it is I'd like to help. If it isn't I'd like to start one. I'm really not sure I can actually do it, but I'll give it a look. I'd apprecirate it if anyone can lead me to specific information that will make this effort possible.

The last driver I wrote was for a laserjet printer in Windows 3.0 more years ago than I want to remember. I sure hope I can write the driver in C, because it has been too long since I've used Assembler.
post #1073 of 1297
start with this and go on from there.

You would use peer driver stack for control of other subunits via the computer and virtual driver stack for making the PC emulate a subunit (for example if you wanted the PC to emulate a DVHS deck.)
post #1074 of 1297
Hyrax,
That would definitely be very cool if you built the driver! Macs apparently already have this built in, so you can record on Macs via firewire. Leszek, if Hyrax built this, could it be integrated into DVHStool without much fuss?
Spearse
post #1075 of 1297
Quote:
Originally posted by spearse
Hyrax,
That would definitely be very cool if you built the driver! Macs apparently already have this built in, so you can record on Macs via firewire. Leszek, if Hyrax built this, could it be integrated into DVHStool without much fuss?
Spearse
NO offense intended to leszek but this particular discusssion has left the author of Dvhstool out of the loop.

May I remind you that Rick Arabian (ricka) wrote Dvhstool and leszek perfected the filter that was needed.

I think we need Rick to chime in on this also.


Joe
post #1076 of 1297
Quote:
Originally posted by spearse
Leszek, if Hyrax built this, could it be integrated into DVHStool without much fuss?
Spearse
Rick should really answer this, but if I had to guess, I would say it should be fairly straight forward.
post #1077 of 1297
Joe,
You're right about that. Rick, this effort could bring DVHStool into a whole new ball game-- having DVHStool actually emulate a DVHS!

Spearse
post #1078 of 1297
Please, don't get too excited yet. When I last wrote a driver it was pretty simple to do so in 16 bit Windows - I could go directly to hardware and I knew exactly how to control the printer. As Spearse said, this is a whole new ball game. I know nothing about FireWire or DVHS decks and very little about drivers.

My starting point for this is that I am a programmer and am willing to investigate how hard this will be to do. I've got a lot of research ahead of me before I even start thinking about writing code. It is possible I'll just spin my wheels for several months and find it is not possible for me to do.

But I'm really going to try to see what I can do. Not having a D-VHS deck will make this a little hard for me, but I'll cross that bridge later.
post #1079 of 1297
Leszek1,
Thanks for the tips, I appreciate it. I do have a MSDN subscription and already have the DDK. I really think I just need info about FireWire to get started.

I should mention that although I do not have a D-VHS deck, I do have a STB that on order that will read and write DVHS files.
post #1080 of 1297
Hyrax,
Do you have a 6200 or 6208 STB? Wonder if it matters what kind of STB and firewire one has.
Spearse
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