[AG-TECH] Recording and streaming access grid session using Windows Media Encoder or VLC

[Andrew Ford]

Hi Tom,

Just FYI, I can't seem to compile AGVCRToMPEG2, and there are some other
reasons this won't compile out of the box for most other people:

1) it won't compile on g++ 4.3 - there are a number of instances of
<string.h> and other c libraries that need to be changed to <cstring>, etc
2) the script for compiling AGVCRToMPEG2.cpp won't find avformat.h, as it
has -I/path/to/ffmpeg/libavformat and a few other subdirectories whereas a
recent version of libavformat (svn20080206) seems to put them straight in
/usr/include/ffmpeg

After fixing all that I get the error:
VPCMPEG2TSConsumer.cpp:73: error: cannot convert 'ByteIOContext**' to
'ByteIOContext*' for argument '1' to 'int url_fclose(ByteIOContext*)'

I'm not sure if this is g++ 4.3 being specifically finicky about pointer
casting or what - I haven't had much time to actually dive into this code
and see if there's a way around it. Any ideas?

Also, in the future I'd definitely be interested in expanding this to be
more comprehensive - adding h264 decoding support is up there, plus I'd like
to see if it's possible to make something out of this that would decode and
tile/aggregate all videos from a venue in realtime to throw it somewhere
else for streaming purposes.

--Andrew

2009/2/3 Thomas D. Uram <turam at mcs.anl.gov>

>  I'd like to point out that the V* code from ANU includes the AGVCRToMPEG2
> project. All of this code, which was previously on agcentral.org, is now
> available in the UChicago subversion repository here:
>
>     https://www.ci.uchicago.edu/svn/if-media
>
> I've had mixed success with AGVCRToMPEG2 so far. With some work, it could
> be the missing link for recording and playback of AG sessions in standard
> movie formats.
>
> If you're interested in this code and end up making changes that you'd like
> to contribute back, you'd simply need to get a UChicago account.  I'll send
> separate mail to the list with more details soon.
>
> Tom
>
>
>
> On 2/3/09 1:35 PM, Tran, Quang V. wrote:
>
>  Thanks Todd.  We are looking to live webstreaming to users desktops.
> Look like splitting video/audio feeds is the better option for us.
>
> --
>
> Quang Tran
> LSU Health Sciences Center
> qtran3 at lsuhsc.edu
>
> ------------------------------
> *From:* Todd Zimmerman [mailto:todd.zimmerman at ubc.ca<todd.zimmerman at ubc.ca>
> ]
> *Sent:* Tue 2/3/2009 1:26 PM
> *To:* Tran, Quang V.
> *Cc:* ag-tech at mcs.anl.gov
> *Subject:* Re: [AG-TECH] Recording and streaming access grid session using
> Windows Media Encoder or VLC
>
>  On Mon, 2009-02-02 at 15:46 -0600, Tran, Quang V. wrote:
> >
> > Is it possible to use Windows Media Encoder or VLC to capture and
> > stream an access grid session?  If not, is there another way to do
> > this?
>
> Are you looking to webstream it to browser/clients?  Or record /
> rebroadcast via AG?
>
> As Jeremy mentioned, agvcr will record and rebroadcast the AG event, but
> will still only be available for AG style clients.
>
> Webstreaming is a bit more difficult since AG is made up of multiple
> video feeds etc.  If there is a specific 'presenting' site, then we use
> a separate capture box (with a split of the primary camera feed and a
> separate 'mixed' audio feed from all the sits) - then used VLC to send
> it to a Quicktime/Darwin streaming server.  VLC will also concurrently
> record the single video/mixed(all sites) audio for a webstream archive.
>
>
>
> Cheers,
>
> Todd
>
>
>
>
>
>
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