So I have a firewire card, they're cheap.
I have a tuner card it was expensive(PVR-250).
I use Myth for TV all the time and love it but this is a crazy question. I want to use Myth for weird stuff, meaning not recording TV but actually to create TV or video.

Can you use Myth to record DV via firewire (IEEE-1394)? I know that you will need a much faster overall Hard Drive to do DV. DV(5:1 hardware compression over uncompressed video) is much more disk intensive then Mpeg-2 is. But DV over Firewire(IEEE-1394) is just bits and bites so you don't need to use much processor for it. Of course you can not see the video from your computer if you use a cheap IEEE-1394 card because they don't include Codec Chips. If you have a camcorder then this is not an issue because the camcorder has the codec chips.
If you can record DV to the Hard Drive is it in an nuv file and does it need to be transcoded so you can use it as a DV file?

Can the new HD camcorders transfer files to MythTV via Firewire??

I know this is not a KnoppMyth specific question but a MythTV question so if you guys have a better forum to post this up let me know. Or if you guys have a better thread to check or place to look let me know.

Since MythTV is Hardware independent with a multiple backend structure you can create a much more complex multicam recording system then is possible with most systems. Not to mention you could edit from the server since it is a server and not just a "dumb" computer recorder.

Sorry to bug you guys with a sorta off topic or completely off topic issue depending on how you look at it.
Lastly, does MythTV have any plans to include simple editing so you could use Myth for all video in the house including the ever popular family home movies? I am not on any lists for Myth so I don't know if this has been announced or is in the works anywhere.
Thanks again everybody.

Rich Shumaker

I have no clue on the firewire, but mythtv already includes simple editing. Granted it's just cutting, no moving fade etc, but "simple" editing is there.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

You don't need mythtv to record over firewire.. I have a DV cam and there are several applications that allow me to download (through firewire) and edit the film and encode it with whatever codec i wish to use.

some links to stuff that may help you:

http://www.icewalkers.com/Linux/Softwar ... deo/11310/

If you are looking to create content, use the right tool. Google for Kino and Cinerella, others exist as well.

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cesman

When the source is open, the possibilities are endless!

Okay I feel spanked (insert spanked emoticon here)
cesman I understand your feelings about using the right tool for the right job. I own 2 dedicated editing systems. I am not trying to replace them with Myth in any way shape or form. I am just trying to enhance their current ablities. One of my systems uses EditionDV by Pinnacle and that software can use network drives to edit from. I have not used it this way yet but this is what is going to happen across the board with all editing software. In time all video editing software will allow editing from networked drives. MythTV is an enhanced network drive. Enhanced with the ability to record TV. TV is video. Video can be edited. Hence the reason I am asking this question. If you want me to go somewhere else to ask this question just tell me where to go and I will ask there.

MythTV is a convergence box. Editing home movies would still fall under this category. And I don't include what Myth does currently as simple editing for family movies. So is anyone "enhancing" myth with the software that exists for editing under linux? Or are there any Myth Projects going on to add Editing to it's abilties?

I am just trying to exploit the power that the MythTV system already has to make something more. Taking the ability to record 2, 4, 6 or more simultaneous recordings and then allowing them to be used over the network. By a seperate system. Either to Watch them or potentially edit them. Systems like this still cost over 20 to 100K. You could build a Myth Recording System for TV(Mpeg-2) for much less. Even for HD which would also be very expensive. But since MythTV is hardware independent and built on Linux it lowers your overall costs.

I would like to record at a minimum 2 DV(Not Mpeg-2) recordings.
So can anyone answer the question,
Can Myth record DV? If it does record DV is it in an NUV file and would it need to be transcoded? Does the transcoding tool exist to do this?
Can a single IEEE-1394(firewire) card allow you to record 2 DV steams?

I am looking to CAPTURE content. MythTV is a capture device. That is what it does. The main difference between MythTV and my editing system for capturing footage is that I press the start and stop to capture or put in marker points from the timecode. MythTV uses scheduling.

Rich Shumaker
Still feelin' the sting

I certainly was not trying to spank you. With 0.17 release, MythTV can record from firewire, so in theory it should be able to record DV. I have not tried, so I cannot say for certain.

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cesman

When the source is open, the possibilities are endless!

Too get better responses to your questions you will most likely need to go to the mythtv mailing lists. I am not aware of projects to expand myth in this direction, but they may well be there. I don't follow the mythtv lists anymore. Unfortunately they are only mailing lists not forums so you will have to sign up for them and email your questions. You can just mail your questions to the list, but then they have to be approved and from my experience some time back that rarely ever happened at least for my questions.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

Thanks for the tip.
I just signed up.
I am going to go thru the archive before asking to see if it has been covered yet. Since IEEE-1394(firewire) is new I have a feeling I won't find much.
Any experimenters out there with a Cam and the newest Myth Running that have tried this out?
Does Myth record everything to NUV files?

Rich Shumaker

well it puts the .nuv extention on all files, but in the case of hd cards or pvr cards it's simply an mpeg2 file with a .nuv extention. I would imagine dv would be similar, but I have not experience in dv whatsoever.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

So something like the pretty scripts could be used to change the name if it is indeed a DV file.

Thanks

Rich Shumaker

The resulting filename you see from the preety script is just a symlink to the real file.

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cesman

When the source is open, the possibilities are endless!

Thanks cesman I didn't know that.

Oh and I got the same chilly reception over at the MythTV mailing list.
I think the letters DV are kryptonite for MythTV.
Cesman I get it "right tool right use" / don't use Myth.
I still have the question, can it do it? Can Myth record DV?

Rich Shumaker

cesman I followed your advice to skip the recording front end on MythTV for DV. Meaning I didn't use my IEEE-1394 card to record it. Heck I am not on the newest revision yet so I don't have IEEE-1394 support yet. I need to work this out before I upgrade. Cuz IEEE-1394 is my main reason for upgrading right now.

Recorded my footage in a DV specific app.
Then sent the DV to my video folder on my MythBox.
Viola I can see the video on my Mythbox.

So MPlayer can play the DV file.
It is squashed on playback. Not sure if that is an MPlayer bug/known issue or if I need to do something to my dv file?

I will need to read up and search about MPlayer for that.

Also I was reading the list at MythTV(after being told how to search it, doah) and it seems that the firewire port is implemented to bring in Mpeg-2TS for HD from that port. And the playback engine for TV(on MythTV) uses Mpeg-2 so it probably wouldn't play the DV file.

So I want to keep seeing what I can do to check this out. So here is a new question.
Is there a way to put a file into the database so that I could use it as though it was recorded by Myth.
The last time I put a file in the tv folder I messed up the database.
Basically the same way you put a file in the video folder then use the utility to update video. I want to do that using the TV folder. Is that possible and how would I do that?

Thanks guys.

Rich Shumaker

not easily.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

I had a feeling. Thanks.
Faking a DB entry is never a good idea. I knew I would need to create an entry from scratch and I have no idea what goes into the DB so I figured it would be a bad plan.
Are there any force refreshes for the tv folder as there is for the video folder?
Not in the menu structure but as a command line command?

So I will need to get a new myth box working with the newest MythTV on it.
Then I will fiddle with IEEE-1394 and see what happens.

Rich Shumaker