Mailing List Archive: MythTV: Users

writing VCDs

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msherman at dsbox

Mar 19, 2003, 2:29 PM

Post #1 of 5 (2152 views)
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writing VCDs

There's been lots of talk with using mencoder to convert the .nuv files
to something else. I'm interested in converting the files to MPEG-1
videos for VCD burning. Has anybody done this successfully using the
patched mencoder? Also, do the newer releases of mplayer require this
patch (since I noticed the patch is against rc4 while rc5 is out now).

In searching the mailing lists I've found references to using "mencoder
file.nuv -oac copy -ovc copy outfile.mpg".

Does anybody have a shell script to take a .nuv file and produce a VCD
.iso and cue file (using vcdimager)?

I've also run across some talk of using nuvplay, exportvideo, and mplex
to produce the final mpg. I suppose you could use nuvplay -e piped into
toolame to produce the audio track, then use exportvideo and mpeg2enc to
make the mpeg video, then mplex them together.

I tell you, I've had nothing but bad luck trying to play/convert video
files in Linux, so any tips would be brilliant. Every VCD I've created
has severe audio syncing problems because of having to extract and
convert the audio and video separately.

--
Michael J. Sherman | Software Developer
Digital Sandbox, Inc. | http://www.dsbox.com/

msherman at dsbox

Mar 19, 2003, 2:58 PM

Post #2 of 5 (2091 views)
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Re: writing VCDs [In reply to]

Attached is what I have compiled so far into a shell script for creating
VCDs. I get a seg fault in the mplex step because it looks like the
audio file isn't being created properly. Anyone have any thoughts?

--
Michael J. Sherman | Software Developer
Digital Sandbox, Inc. | http://www.dsbox.com/

Attachments:

make_vcd.sh (1.54 KB)

jasonmiller at micron

Mar 19, 2003, 3:14 PM

Post #3 of 5 (2091 views)
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RE: writing VCDs [In reply to]

After perusing through the quagmire of .nuv conversion messages on the list, I was able to create a vcd last night with the two step approach below:

mencoder -ovc copy -oac copy source.nuv -o test.avi
mencvcd test.vcd -abr 224 -asr 44100 -mpgonly -noburn -vbr 1150 -vfr 4 -vnorm n test.avi

MythTV v0.8
Mplayer v0.90_rc4 + patch

-----Original Message-----
From: Michael J. Sherman [mailto:msherman [at] dsbox]
Sent: Wednesday, March 19, 2003 2:58 PM
To: Discussion about mythtv
Subject: Re: [mythtv-users] writing VCDs

Attached is what I have compiled so far into a shell script for creating
VCDs. I get a seg fault in the mplex step because it looks like the
audio file isn't being created properly. Anyone have any thoughts?

--
Michael J. Sherman | Software Developer
Digital Sandbox, Inc. | http://www.dsbox.com/

easygreenus at yahoo

Apr 6, 2003, 1:17 PM

Post #4 of 5 (2082 views)
Permalink

Re: Writing VCDs [In reply to]

Hi,

I've had some success in writing the VCDs, but I
have an audio sync problem.

First, went back and reread the the MythTV
installation document where they talk about
converting files. There is an updated patch for
.90rc5 now available at:

http://dijkstra.csh.rit.edu:8088/~mdz/mythtv/mplayer-0.90rc5-mythtv-20030405.diff

I was able to apply that patch and try some
conversions.

I tried Jason Millers suggestion of

mencoder -ovc copy -oac copy source.nuv -o test.avi

I viewed the .avi file using mplayer. The audio
starts out in sync, but quickly falls behind. Longer
you watch, the farther behind the audio gets.
I went ahead and used the command:

mencvcd test.vcd -abr 224 -asr 44100 -vbr 1150 -vfr 4
-vnorm n test.avi

to see what the result was. I did get a VCD, but the
audio shows the same sync behavior as the .avi. I
really didn't expect any difference, but I thought
I'd try. I can play this using Xine on the computer,
or on my home DVD player. Audio shows same
out-of-sync behavior.

I'm trying new conversion suggested in a recent
thread. Its still running. I'll let you know
if the created .avi is any better.

Does anyone have any other ideas? I've read through
a LOT of threads on this subject. Seems the only
ones who have had good success move their files to
a Windows partition to do some steps. Don't have
one of those. Anyone successful with a full Linux
environment?

Thanks,

Mike

Mike

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easygreenus at yahoo

Apr 6, 2003, 1:29 PM

Post #5 of 5 (2077 views)
Permalink

Re: Re: Writing VCDs [In reply to]

An update to my previous email. I went back to the
original .nuv file I was working with. I used the
patched version of mplayer to watch it. The
.nuv file, played with patch mplayer has the
same sync problem. Audio falls behind the video.

Thanks,

Mike

--- Mike Smith <easygreenus [at] yahoo> wrote:
> Hi,
>
> I've had some success in writing the VCDs, but I
> have an audio sync problem.
>
> First, went back and reread the the MythTV
> installation document where they talk about
> converting files. There is an updated patch for
> .90rc5 now available at:
>
>
http://dijkstra.csh.rit.edu:8088/~mdz/mythtv/mplayer-0.90rc5-mythtv-20030405.diff
>
> I was able to apply that patch and try some
> conversions.
>
> I tried Jason Millers suggestion of
>
> mencoder -ovc copy -oac copy source.nuv -o test.avi
>
> I viewed the .avi file using mplayer. The audio
> starts out in sync, but quickly falls behind.
> Longer
> you watch, the farther behind the audio gets.
> I went ahead and used the command:
>
> mencvcd test.vcd -abr 224 -asr 44100 -vbr 1150 -vfr
> 4
> -vnorm n test.avi
>
> to see what the result was. I did get a VCD, but
> the
> audio shows the same sync behavior as the .avi. I
> really didn't expect any difference, but I thought
> I'd try. I can play this using Xine on the
> computer,
> or on my home DVD player. Audio shows same
> out-of-sync behavior.
>
> I'm trying new conversion suggested in a recent
> thread. Its still running. I'll let you know
> if the created .avi is any better.
>
> Does anyone have any other ideas? I've read through
> a LOT of threads on this subject. Seems the only
> ones who have had good success move their files to
> a Windows partition to do some steps. Don't have
> one of those. Anyone successful with a full Linux
> environment?
>
> Thanks,
>
> Mike
>
> Mike
>
> __________________________________________________
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> Yahoo! Tax Center - File online, calculators, forms,
> and more
> http://tax.yahoo.com
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] snowman
>
http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users

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