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Save recording on DVD?

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markknecht at gmail

Aug 10, 2008, 1:39 PM

Post #1 of 12 (1768 views)
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Save recording on DVD?

My wife is asking if it's possible to save a recording of the Olympics
opening ceremonies on DVD. Is there some simple way to do this?

SD recording file from a PVR-150/250 which is currently about 10GB so
I suspect it's too large for a single DVD.

I know *nothing* about changing file formats, etc., so it would be
great if there was a web page that explains this in a simple way.

Thanks,
Mark
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klein.aaron at gmail

Aug 10, 2008, 2:01 PM

Post #2 of 12 (1710 views)
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Re: Save recording on DVD? [In reply to]

Its possible to get the 4+ hours onto a DVD as they likly had a fair
number of comercial breaks. You will either need to do a fair amount
of compresion to fit on a single sided 4.7GB disk or less if you go
with the more expensive double layer DVD. Myth has a great plug in
called mytharchive. If you go there and select to archive a recording
and then to create a DVD you will be presented with some windows. You
can select your recording you want to archive being the olympic
opening ceremony. You can then select the compression level. If you
want to try a single layer disk then set it to EP or what ever the
longest play setting is. Then you can select from a DVD menu format.
For example I like the auto play as it will just start playing the
file with no menus. Part of the process is also selectingif you want
to create an ISO or burn to DVD. If you have a DVD burner in your
system then you could chose that option. I dont so I select ISO and
then ftp the file over to a windows system for the acutal burning.

Prior to doing this you should mark the ad breaks and if you do this
then mytharchive will have an option to honor the cut list so your
4hour 30 min recording will be less than 4 hours after cutting out the
ads.

On Sun, Aug 10, 2008 at 4:39 PM, Mark Knecht <markknecht[at]gmail.com> wrote:
> My wife is asking if it's possible to save a recording of the Olympics
> opening ceremonies on DVD. Is there some simple way to do this?
>
> SD recording file from a PVR-150/250 which is currently about 10GB so
> I suspect it's too large for a single DVD.
>
> I know *nothing* about changing file formats, etc., so it would be
> great if there was a web page that explains this in a simple way.
>
> Thanks,
> Mark
> _______________________________________________
> mythtv-users mailing list
> mythtv-users[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
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mythtv at rodsbooks

Aug 10, 2008, 2:35 PM

Post #3 of 12 (1710 views)
Permalink

Re: Save recording on DVD? [In reply to]

On Sunday 10 August 2008 04:39:28 pm Mark Knecht wrote:
> My wife is asking if it's possible to save a recording of the Olympics
> opening ceremonies on DVD. Is there some simple way to do this?
>
> SD recording file from a PVR-150/250 which is currently about 10GB so
> I suspect it's too large for a single DVD.

10GB is within spitting distance of the capacity of a dual-layer disc. If that
10GB includes commercials, then after editing them out, it would probably fit
on a dual-layer disc. OTOH, dual-layer discs are likely to be less archival
than single-layer discs, so you might need to compress it down or split it
across two discs. Compressing it is fairly easy with MythArchive, although
it'll take the system a while (possibly hours) to churn on that file. (A tip:
Don't burn directly to DVD; create a file and then burn that manually. That
way you can check the file first to be sure it's OK.)

If you want to split an existing file into parts, it's possible, but you've
got to juggle files. First, copy the original file to a backup location. (You
may need to figure out which one it is in the recordings directory.) Then use
MythTV's editing features to lop off part of the file -- say, the second half
if you want to break the file in two. If the file's already in MPEG-2 format,
your best bet is to select lossless transcoding options; that's quick and
results in no loss of quality. When you're done, you should have a file
that's roughly half (or whatever) the original file's size. Copy that to a
video directory and move or copy the original backup file back in its place.
Select another lossless transcode and MythTV will recognize the original
recording in its full size. You can then repeat the process, but this time
lop off the part that you preserved the first time around. You'll now have
two (or more) files, each sized to fit your DVD. Use MythArchive to burn them
without re-encoding them. Of course, there are lots of variants of this
procedure that involve different types of transcoding or other details. You
could also use non-MythTV tools to do this sort of thing.

--
Rod Smith
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bobbygill at rogers

Aug 10, 2008, 2:39 PM

Post #4 of 12 (1707 views)
Permalink

Re: Save recording on DVD? [In reply to]

If you are running linux, DeVeDe is a wonderful tool where you can pop in a
video file, hit one button and it will adjust the bitrate of the encode to
keep the file at the max size per the disc being used.

On Sun, Aug 10, 2008 at 5:35 PM, Rod Smith <mythtv[at]rodsbooks.com> wrote:

> On Sunday 10 August 2008 04:39:28 pm Mark Knecht wrote:
> > My wife is asking if it's possible to save a recording of the Olympics
> > opening ceremonies on DVD. Is there some simple way to do this?
> >
> > SD recording file from a PVR-150/250 which is currently about 10GB so
> > I suspect it's too large for a single DVD.
>
> 10GB is within spitting distance of the capacity of a dual-layer disc. If
> that
> 10GB includes commercials, then after editing them out, it would probably
> fit
> on a dual-layer disc. OTOH, dual-layer discs are likely to be less archival
> than single-layer discs, so you might need to compress it down or split it
> across two discs. Compressing it is fairly easy with MythArchive, although
> it'll take the system a while (possibly hours) to churn on that file. (A
> tip:
> Don't burn directly to DVD; create a file and then burn that manually. That
> way you can check the file first to be sure it's OK.)
>
> If you want to split an existing file into parts, it's possible, but you've
> got to juggle files. First, copy the original file to a backup location.
> (You
> may need to figure out which one it is in the recordings directory.) Then
> use
> MythTV's editing features to lop off part of the file -- say, the second
> half
> if you want to break the file in two. If the file's already in MPEG-2
> format,
> your best bet is to select lossless transcoding options; that's quick and
> results in no loss of quality. When you're done, you should have a file
> that's roughly half (or whatever) the original file's size. Copy that to a
> video directory and move or copy the original backup file back in its
> place.
> Select another lossless transcode and MythTV will recognize the original
> recording in its full size. You can then repeat the process, but this time
> lop off the part that you preserved the first time around. You'll now have
> two (or more) files, each sized to fit your DVD. Use MythArchive to burn
> them
> without re-encoding them. Of course, there are lots of variants of this
> procedure that involve different types of transcoding or other details. You
> could also use non-MythTV tools to do this sort of thing.
>
> --
> Rod Smith
> _______________________________________________
> mythtv-users mailing list
> mythtv-users[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

markknecht at gmail

Aug 10, 2008, 3:19 PM

Post #5 of 12 (1698 views)
Permalink

Re: Save recording on DVD? [In reply to]

On Sun, Aug 10, 2008 at 2:01 PM, Aaron Klein <klein.aaron[at]gmail.com> wrote:
> Its possible to get the 4+ hours onto a DVD as they likly had a fair
> number of comercial breaks. You will either need to do a fair amount
> of compresion to fit on a single sided 4.7GB disk or less if you go
> with the more expensive double layer DVD. Myth has a great plug in
> called mytharchive. If you go there and select to archive a recording
> and then to create a DVD you will be presented with some windows. You
> can select your recording you want to archive being the olympic
> opening ceremony. You can then select the compression level. If you
> want to try a single layer disk then set it to EP or what ever the
> longest play setting is. Then you can select from a DVD menu format.
> For example I like the auto play as it will just start playing the
> file with no menus. Part of the process is also selectingif you want
> to create an ISO or burn to DVD. If you have a DVD burner in your
> system then you could chose that option. I dont so I select ISO and
> then ftp the file over to a windows system for the acutal burning.
>
> Prior to doing this you should mark the ad breaks and if you do this
> then mytharchive will have an option to honor the cut list so your
> 4hour 30 min recording will be less than 4 hours after cutting out the
> ads.
>
> On Sun, Aug 10, 2008 at 4:39 PM, Mark Knecht <markknecht[at]gmail.com> wrote:
>> My wife is asking if it's possible to save a recording of the Olympics
>> opening ceremonies on DVD. Is there some simple way to do this?
>>
>> SD recording file from a PVR-150/250 which is currently about 10GB so
>> I suspect it's too large for a single DVD.
>>
>> I know *nothing* about changing file formats, etc., so it would be
>> great if there was a web page that explains this in a simple way.
>>
>> Thanks,
>> Mark

Aaron, Rod & Bobby,
Thanks for the info. It's really helpful. I've emerged both
mytharchive and devede so I can try them both.

As for this specific program the recording is about 5 hours but the
ceremony wasn't anywhere near that long. There was commercial
detection done but I've not reviewed it for accuracy. However from
this thread it seems that you are telling me that I can edit how Myth
sees the commercials? Essentially put in my own commercial breaks? And
then mytharchive can write to the DVD leaving out the commercial data?
If so I'd think I might get the part my wife wants - just the fancy
Hollywood stuff and not the entry of the athletes, under 2 hours and
onto a single DVD.

I guess I'll need to learn about hand editing commercial breaks? Is
this difficult or error prone?

thanks,
Mark
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beww at beww

Aug 10, 2008, 3:32 PM

Post #6 of 12 (1701 views)
Permalink

Re: Save recording on DVD? [In reply to]

Mark Knecht wrote:

> I guess I'll need to learn about hand editing commercial breaks? Is
> this difficult or error prone?

I think you want to learn about "editing" in general, not specifically
just commercial breaks.

There are a lot of video editing programs available for Linux, from
gopchop to Cinelerra, or from very basic to capable of creating a
feature film.

Obviously you will want to start with the more basic stuff, perhaps
avidemux, which can also do some housekeeping stuff as well as edit.

After the commercials have been flagged they then have to be actually
removed from the file (edited out). The internal myth player knows how
to skip the flagged commercials but nothing else in the world of players
does. Normally you convert the commercial marks to cutpoints, then
trandcode and remove them, then create your DVD.

If you trust your commercial flagging it can be as easy as hitting a few
keys and letting Myth convert the flags to cutpoints (an EDL in the
vernacular, Edit Decision List). It rarely works out to be that easy though.

beww
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klein.aaron at gmail

Aug 10, 2008, 3:52 PM

Post #7 of 12 (1694 views)
Permalink

Re: Save recording on DVD? [In reply to]

If you have a keyboard on your myth box start the recording like your
going to watch it. Push the E key to enter "edit" mode and then press
the Z key to load the ad breaks that myth has detected. Now you can
use the up and down buttons on the keyboard or the remote and the left
and right buttons to move forward and backward in the show and you can
adjust how the cursor moves by increasing or decreasing the time
frame. For example when I take breaks out of a movie I will toggle
between the cut and 1 minute timeframes. I will jump to the next
cutpoint and then go backward 1 sec and forward 1 sec to see if indeed
its at a break. If its not you can use the enter key to adjust the
cut point.

For more detailed info look in the myth wiki @
http://www.mythtv.org/wiki/index.php/Removing_Commercials

On Sun, Aug 10, 2008 at 6:32 PM, Brian Wood <beww[at]beww.org> wrote:
> Mark Knecht wrote:
>
>> I guess I'll need to learn about hand editing commercial breaks? Is
>> this difficult or error prone?
>
> I think you want to learn about "editing" in general, not specifically
> just commercial breaks.
>
> There are a lot of video editing programs available for Linux, from
> gopchop to Cinelerra, or from very basic to capable of creating a
> feature film.
>
> Obviously you will want to start with the more basic stuff, perhaps
> avidemux, which can also do some housekeeping stuff as well as edit.
>
> After the commercials have been flagged they then have to be actually
> removed from the file (edited out). The internal myth player knows how
> to skip the flagged commercials but nothing else in the world of players
> does. Normally you convert the commercial marks to cutpoints, then
> trandcode and remove them, then create your DVD.
>
> If you trust your commercial flagging it can be as easy as hitting a few
> keys and letting Myth convert the flags to cutpoints (an EDL in the
> vernacular, Edit Decision List). It rarely works out to be that easy though.
>
> beww
> _______________________________________________
> mythtv-users mailing list
> mythtv-users[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
_______________________________________________
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mythtv-users[at]mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

mythtv at rodsbooks

Aug 10, 2008, 9:56 PM

Post #8 of 12 (1675 views)
Permalink

Re: Save recording on DVD? [In reply to]

On Sunday 10 August 2008 06:32:29 pm Brian Wood wrote:
> Mark Knecht wrote:
> > I guess I'll need to learn about hand editing commercial breaks? Is
> > this difficult or error prone?
>
> I think you want to learn about "editing" in general, not specifically
> just commercial breaks.
>
> There are a lot of video editing programs available for Linux, from
> gopchop to Cinelerra, or from very basic to capable of creating a
> feature film.

MythTV has its own editing features. I don't recall the keyboard keypresses,
offhand, since I do it using my remote.

> After the commercials have been flagged they then have to be actually
> removed from the file (edited out). The internal myth player knows how
> to skip the flagged commercials but nothing else in the world of players
> does. Normally you convert the commercial marks to cutpoints, then
> trandcode and remove them, then create your DVD.

It can be simpler than that. MythArchive has an option to honor cut points. If
all you want to do is remove blocks of a recording, you can mark them in
MythTV, set up the archiving, and the resulting DVD should be the edited
version. (At least, that's the way it works in 0.20.2 -- I still haven't
upgraded to 0.21.) I seldom use this feature myself; I generally do lossless
transcodes because it takes me a while to get around to creating a DVD and I
want to save disk space in the meantime, and/or I need to transcode to change
the bitrate.

If you want to do something more complicated than remove commercials, like
split a single recording up onto multiple discs or re-order a single
recording, then you'll need more sophisticated tools.

> If you trust your commercial flagging it can be as easy as hitting a few
> keys and letting Myth convert the flags to cutpoints (an EDL in the
> vernacular, Edit Decision List). It rarely works out to be that easy
> though.

Commflagging is seldom 100% accurate, so at the very least the cut points
should be reviewed to be sure you're not cutting out anything important.

--
Rod Smith
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gull at gull

Aug 11, 2008, 11:44 AM

Post #9 of 12 (1643 views)
Permalink

Re: Save recording on DVD? [In reply to]

On Sun, 10 Aug 2008 18:52:51 -0400, Aaron Klein wrote
> For example when I take breaks out of a
> movie I will toggle between the cut and 1 minute timeframes. I will
> jump to the next cutpoint and then go backward 1 sec and forward 1
> sec to see if indeed its at a break. If its not you can use the
> enter key to adjust the cut point.

I've also found, if you really want precise control, that it's best to move
the cutpoints so they're on keyframe boundaries. (Select 'keyframe' as your
increment, and step back and forth until you find the best point.) Otherwise,
the transcoder will often shift the cut point to the nearest keyframe, and not
always in the direction you'd prefer.

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nick.rout at gmail

Aug 11, 2008, 2:11 PM

Post #10 of 12 (1635 views)
Permalink

Re: Save recording on DVD? [In reply to]

On Tue, Aug 12, 2008 at 6:44 AM, David Brodbeck <gull[at]gull.us> wrote:
> On Sun, 10 Aug 2008 18:52:51 -0400, Aaron Klein wrote
>> For example when I take breaks out of a
>> movie I will toggle between the cut and 1 minute timeframes. I will
>> jump to the next cutpoint and then go backward 1 sec and forward 1
>> sec to see if indeed its at a break. If its not you can use the
>> enter key to adjust the cut point.
>
> I've also found, if you really want precise control, that it's best to move
> the cutpoints so they're on keyframe boundaries. (Select 'keyframe' as your
> increment, and step back and forth until you find the best point.) Otherwise,
> the transcoder will often shift the cut point to the nearest keyframe, and not
> always in the direction you'd prefer.

perhaps someone should take a leaf out of dvbcut's book. It does frame
accuarte mpeg2 chopping and has a very good interface (if you are
using a mouse).
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nick.rout at gmail

Aug 11, 2008, 2:28 PM

Post #11 of 12 (1634 views)
Permalink

Re: Save recording on DVD? [In reply to]

gull at gull

Aug 11, 2008, 7:03 PM

Post #12 of 12 (1622 views)
Permalink

Re: Save recording on DVD? [In reply to]

Nick Rout wrote:
>
> perhaps someone should take a leaf out of dvbcut's book. It does frame
> accuarte mpeg2 chopping and has a very good interface (if you are
> using a mouse).
>
I've used dvbcut before. It's a nifty program, although about one time
out of five it creates a corrupt file where the video and audio play
back at massively different speeds. I used it once to chop up a video
capture of a VHS tape with a couple dozen shorts on it, and I had to go
back and rework several because of that. mythtranscode doesn't seem to
have that problem, maybe because it doesn't try to monkey around between
keyframes.

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