[mythtv-users] multi-camera TV recordings?

[José Oliver Segura]

On Wed, Jun 17, 2015 at 2:37 PM, Andre Newman <mythtv-list at dinkum.org.uk>
wrote:

>
> On 16 Jun 2015, at 22:45, José Oliver Segura <primijos at gmail.com> wrote:
>
> > Hi all,
> >
> > Does anybody know if it's possible to record and play files with more
> than one video stream in them?
> >
> > I'm trying to figure out how to record and play "multi-camera" shows
> (mainly sports/motor events). I receive them via IPTV, each camera has its
> own multicast address and I've done some experiments in order to use avconv
> + the external recorder option (through a custom script) available in
> mythtv to make all those independent channels look like a single channel
> with multiple video streams in it.
> >
> > The problem is that the final step would be to be able to cycle among
> those video streams when playing back the recorded file, but I can't find
> any information about whether tha'ts possible or not in mythtv. I know
> dvd/blueray playback has some sort of multi-angle support, but I can't find
> nothing similar regarding recorded TV.
>
> I’ve used VLC for playback of full transport streams, they can have many
> channels within the same file. VLC allows you to select which channel to
> watch by name, even decodes subtitles and multiple audio streams. I’ve
> never found a way to do this with the same file in MythTV.
>

Yes, I've done some tests with VLC and a quick-made mpeg with multiple
video streams in it and it works (kind of, I need to figure out how to tell
vlc which video stream to use as default, as right now it opens multiple
windows, one for each video stream). My hope was in mythtv supporting this
also.


>
> I do have some multi angle DVDs, I just tried one from an iso file and
> there’s an angle menu which allows selection of the four video angles,
> maybe you could mux together the video streams in the same way a multi
> angle dvd does? Maybe ffmpeg can be persuaded to do this?
>

I believe multi-angle DVDs and multi-video mpeg use different methods for
storing multiple video streams in a single file. I don't know if
avconv/ffmpeg or any other tool support the conversion from multi-video
stream to multi-angle dvd. In any case, looks like this should be done as a
post-proces job, after recording, and generate a file into the video
library of mythtv.


>
> I just tried a transport stream with several video channels in it and
> MythTV just plays the first one and there’s no select video stream menu
> like the select audio one.
>
>
Yeas, that was my bet also. Thanks for confirming it.

best,
Jose
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