Hi Ruben,
so if I understood it right, these Youtube videos are not yet created
with Matterhorn, but with a gstreamer script and then uploaded? Or have
you created a Matterhorn workflow operation for this already?
I looked in the last weeks to do something similar but with
picture-on-picture with the ffmpeg composer, where with the 0.8.2 and
later versions we have pipelines too. But if your workflow is done
already it would be great to get this. I see the need too to offer a
one-stream output to export it to various channels (youtube / iTunes U).
Regards
Rüdiger
Am 04.05.2012 10:46, schrieb Rubén Pérez:
Hi Olaf,
Your feedback is welcome. Yes, I agree that this distribution may not
be suitable for watching in mobile devices, but on the other hand, we
didn't have that in mind when we designed the layout either. However,
the size of the streams can be (in fact: it is already) easily resized
to match other layouts where the presentation looks bigger than the
presenter. The black bars, as you imagine, are an unfortunate
consequence of trying to fit two 4:3 streams into a 16:9 stream. After
all, it's Youtube and we are limited to a single stream, and I
personally prefer a recording where you can see the professor than
with a video where you see the slides and you just "hear" the
professor. It feels less natural. We all know that the interest to
publish videos in Youtube is not about their superior qualities for
two-track videos, but for getting a wider audience for your media content.
Best regards
Rubén
2012/5/3 Schulte Olaf A. <[email protected] <mailto:[email protected]>>
Hello Ruben
A fine solution for two-track recordings on YouTube, so I hope you
don't mind me adding: As long as you're at your desktop, where the
fullscreen especially give you an "engage-like" experience. The
mobile distribution of course suffers from the slides being too
small to be legible, with too much real estate being given away to
lecturers, I think. Plus, the black bars you create. But as Hank
was saying, we'll encounter these for quite some time and unless
you're willing (and technically capable) to drop video according
to the distribution environment, this will probably best be solved
by the user for the time being by choosing his/her favourite
setting in the engage player.
Regards
Olaf A.
*Von:*[email protected]
<mailto:[email protected]>
[mailto:[email protected]
<mailto:[email protected]>] *Im Auftrag
von *Hank Magnuski
*Gesendet:* Donnerstag, 3. Mai 2012 17:40
*An:* Matterhorn Users
*Betreff:* Re: [Matterhorn-users] Side-By-Side Youtube Publishing
Rubén,
Thank you for this post and fine example of a two-screen composition.
People in the Matterhorn community have been asking me "Why do the
NCast Capture Agents do a single video track recording?" and I
think your post illustrates the problem in that most media
playback systems today can only handle a single video track. So
the NCast units create such a composite video in the first place
and through workflows at the server we split the original into two
separate streams for Matterhorn processing (basically just the
reverse procedure which you illustrated in your post).
We have debated single-track vs. dual-track recording for many
years, and our conclusion has been that single-track recordings
are easier to deal with given current media players and technology.
The good news is that this problem will only get worse in the
future, as many, many classrooms are moving to hi-def and we are
now facing the issues of recording two hi-def, 16:9 image streams,
and compositing a 32:9 or a 16:18 video image for playback will
simply not work.
This new environment will surely force the issue of two track
recording, and two-track players (as implemented in the Engage
player) seem to me to be the only reasonable way to present the
user with dual 16:9 playback.
Hank
p.s. Our PR-720-D hardware is capable of dual hi-def recordings.
On Thu, May 3, 2012 at 7:15 AM, Rubén Pérez <[email protected]
<mailto:[email protected]>> wrote:
Dear all,
We have been uploading video contents to Youtube as part of the
campus of excellence "Campus do Mar" project. Even though all the
media content is processed by Matterhorn, the publishing to
Youtube is done via PuMuKIT, so we don't use the recently-finished
workflow handler to publish in Youtube.
As we wanted to give our Youtube viewers an experience as close as
possible to watching the videos in the Engage player, we decided
to make a composition with both streams side by side, so that the
viewer can see the presentation AND the presenter at the same
time. You can see some examples in
http://www.youtube.com/user/CampusdoMar/videos?view=1 (any of the
playlists starting with "2012").
The composition was made with a Python script using Gstreamer,
adding all the elements (intro, overlays and side-by-side
composition in a single go).
I would like to start a discussion about the different approaches
the adopters following to upload their recordings to iTunes and
Youtube. Are you uploading single streams? Are you composing them
somehow? Which technologies are you using? I hope we all can
benefit from this share of knowledge.
Best regards
Rubén
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Rüdiger Rolf, M.A.
Universität Osnabrück - Zentrum virtUOS
Heger-Tor-Wall 12, 49069 Osnabrück
Telefon: (0541) 969-6511 - Fax: (0541) 969-16511
E-Mail: [email protected]
Internet: www.virtuos.uni-osnabrueck.de
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