MythTV working, how to convert .nuv

noff

I've been reading all the documentation on how to convert the Nuppelvideo files mythtv creates and convert them to something small. I can't seem to get any of the programs, exportvideo, mpeg2-movie, or mpeg2tools to compile. I think the main one I need is exportvideo. My goal is to convert them to realvideo or at least divx.

Another solution, is there a way to get mythtv to record not in .nuv?

I tried vcr, but was annoyed by the flipping. Mplayer thrashed the signal when I used it to flip it.
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What Larry was saying is that if you make it too easy for programmers, then poor programmers will be able to do things best left to good programmers, and will inevitably do them poorly. Everyone will suffer in the long term as a result." - Tom Chance

zypher · Posted: Tue Jan 21, 2003 6:28 am Post subject:

Try avidemux, it should be able to handle nuppel.
I never tested it, though.
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noff · Posted: Tue Jan 21, 2003 6:42 am Post subject:

Unfortunately, it doesn't want to open the file. If I can get it into something avidemux can use I will be using that to cut out commercials.
_________________
What Larry was saying is that if you make it too easy for programmers, then poor programmers will be able to do things best left to good programmers, and will inevitably do them poorly. Everyone will suffer in the long term as a result." - Tom Chance

mean · Guru Joined: 25 Sep 2002 Posts: 313

That's strange, avidemux can read .nuv

Could you post somewhere a really short sample ?

noff · Posted: Tue Jan 21, 2003 7:14 am Post subject:

I can't post a file, it records at 50MB/min. I get an alert problem opening that file with avidemux. On my system Mplayer cannot play them either. Mythtv can play them, but that is it.
_________________
What Larry was saying is that if you make it too easy for programmers, then poor programmers will be able to do things best left to good programmers, and will inevitably do them poorly. Everyone will suffer in the long term as a result." - Tom Chance

mean · Guru Joined: 25 Sep 2002 Posts: 313

If mplayer cannot play it either, it is probably not a vanilla nuv file

noff · Posted: Thu Jan 23, 2003 5:19 am Post subject: Sorry for the RTFM

Sorry this was a case of RTFM. It appears that MythTV doesn't use standard Nuppelvideo, but there is a patch for use with mplayer/mencoder. If anyone is interested http://dijkstra.csh.rit.edu:8088/~mdz/mythtv/mplayer-0.90pre10+mythtv.patch

It would be nice if that got incorporated into the mplayer codebase. I'm recompiling mplayer now, and it hasn't had any problems yet. If it works I post, since I think there are a fair amount of people out there who are trying mythtv, and maybe impatient like me.
_________________
What Larry was saying is that if you make it too easy for programmers, then poor programmers will be able to do things best left to good programmers, and will inevitably do them poorly. Everyone will suffer in the long term as a result." - Tom Chance

noff · Posted: Fri Jan 24, 2003 3:32 am Post subject:

Ok if anyone is curious, the myth path allow you to play on mplayer and use mencoder. However I can't seem to get the video stream to come up. I just get a blank screen and sound. Oh and the patch only works if you use rtjpeg not mpeg4 with myth. So I am at least part of the way there.

I get this error when I try to play video in mplayer before it starts up

mean · Guru Joined: 25 Sep 2002 Posts: 313

If you put up a 5 seconds sample of the weird nuv format somewhere i believe i could add support for it to avidemux.

I already did it as avidemux can read also the non-standard nuv generated by nuppel_gatos which use Xvid as encoder.

kf0yn · Tux's lil' helper Joined: 25 Jan 2003 Posts: 84

I haven't had any trouble using the patched mplayer to handle the MPEG4 .nuv files that MythTV creates. Mostly I use mencoder to convert it into an AVI file, so that I can ultimately make a DVD out of it, though.

knox · n00b Joined: 17 Jan 2003 Posts: 18

can you guys post the steps you took to apply the patch and get mplayer working with the mythtv Nuppel files.

The best I have been able to get is this:

panix · n00b Joined: 17 Dec 2002 Posts: 5

the patch to mplayer only seems to work for the nuv files encoded with the mpeg4 encoder. rtjpeg doesnt work.

The conversion to divx worked great for me. Only problem I had was when I would convert from divx to mpeg2 or mpeg1. I had audio/video sync problems. Never solved that problem.

knox · n00b Joined: 17 Jan 2003 Posts: 18

has anyone supplied an ebuild that adds the patch?

knox · n00b Joined: 17 Jan 2003 Posts: 18

I am strill trying to get this patch working properly with mplayer. I have tried applying the patch to both the latest rc4 package and the pre10 package the the patch was originally coded for and they both yield the same error.

panix · n00b Joined: 17 Dec 2002 Posts: 5

Use the following to convert to an avi file from nuv file.

You must have the mplayer patched with the mythtv nuv patch.

mencoder -ovc copy -oac copy filename.nuv

this will produce test.avi which you can further convert to other formats using mencoder (mencvcd to make vcd's, etc.). Doing it this way helps keep the audio/video synced.

knox · n00b Joined: 17 Jan 2003 Posts: 18

actually ... i could have posted my own response to this one.

I found out that recordings done WITHOUT mp3 compressed audio are not playable. So, you can't set "DontCompressAudio=1" if you want to do the conversions. This is a bummer because all of my recordings were done this way. I am not too sure why mplayer wouldn't be able to play the uncompressed audio, but I do remember reading something about mplayer not fully supporting libavcodec's audio stuff, so maybe thats why. Either that or the patch just doesn't include the code it needs to support it.

Anyways ... as soon as I started recording using mp3 compressed audio then everything worked fine.

I am trying to figure out some good settings for compressing the video's now. I usually record at 3300 kbit/s 720x480, but 1gb for a 30min episode is just way to much to actually archive, especially since it won't even fit on a cd. I also find that it becomes even more tricky when you are working with animation, which I have a lot of.

mean · Guru Joined: 25 Sep 2002 Posts: 313

@noff:
Could you try building avidemux 0.9rc1 + the patch on this thread ? http://forum.media-video.com/index.php?act=ST&f=34&t=9936&
It should (may ?) add mythTV support

AFAIK there is no ebuild for rc1 (zypher ?) so build it from source.