The delay shouldn't be a problem, as long as it's fairly short. It just caught me by surprise, and I wanted to get a sense of how large it was.
On Sun, Apr 19, 2015 at 10:42 PM, Tom Metro <[email protected]> wrote: > John Abreau wrote: > > The only real question was whether the live-stream would replace the > > old camera, or merely augment it. Based on the results we got this > > month, it looks like it will be best to use both. The webcam does a > > great job of live-streaming the meeting, but the old camera produces > > a much higher quality video. > > There are a lot of inexpensive ($100 to $200) point-and-shoot cameras on > he market that claim to do 1080p video. (Some sub-$100 cameras can be > found on Amazon.) Not only should such a camera offer better quality > than a typical web cam, but you also typically get a zoom lens so you > can more easily frame what you want to record. > > Many YouTubers use cameras like this, and later graduate to DSLRs. I was > curious to see if there were any that could not only record the video > but stream it as well over USB. There are cameras that can, but > apparently they are quite rare, and it is hard to identify them based on > specifications. > > Even third party reviews aren't of much help, as they usually don't > address the live streaming need. You can find lots of reviews for > cameras useful for recording YouTube videos, but they all assume a > record-and-upload process. > > (The reviews, however, do point out that most of the low cost > point-and-shoot cameras fall short when it comes to capturing audio, and > a mic jack is unlikely to exist until you move up to a DSLR. But as long > as the live video doesn't have much latency, you can just feed audio > separately into Hangouts.) > > Despite the difficulties of finding the right camera that supports this > functionality, I still think this is probably a better than a web cam. > > > Jerry Feldman wrote: > > As for sound, there are microphones at the podium we can use. > > If you have the budget, a wireless lapel mic would probably be best for > the speaker. > > Some of the MIT rooms have ceiling mics to pick up the audience, which > could be used for the Q&A portion, but might be simpler to just use an > omni or 180 degree pattern USB mic for that, like > https://youtu.be/fANP9Q6OKmQ > > For Boston.pm we often deal with remote speakers, so micing the speaker > isn't our responsibility, but micing the room is, and for that using the > laptop's built-in mic isn't ideal, so we're considering an external mic. > > > John Abreau wrote: > > I could use help figuring out the delay. At one point early in > > Brian's talk, I stepped aside and pulled up the youtube feed on my > > tablet to verify that everything was working, and the live stream was > > delayed significantly from what Brian was saying at the time. > > In my experience this is typical. > > When using Hangouts, there are two ways of accessing the stream: 1. As a > contributing participant in the Hangout. For these users the delay is > kept to a minimum. (If you were having a video call with someone, a long > delay would make the product unusable.) 2. As a view-only observer > through YouTube or the Hangouts UI. For these users you'll see a delay. > > My guess is that for users in group #2, regardless of which UI they are > using, Google is passing the stream from the Hangouts servers to the > YouTube servers in order to allow you to scale up to hundreds or > thousands of viewers, and propagation delay is added in the process. > > Also keep in mind that YouTube lets you pause the live stream. When you > unpause it resumes from where you left off. (I'm not sure if that is > limited to a maximum window, beyond which it jumps forward in the > stream.) But this is another way in which you can end up with a > significant delay between what you see and what is live. > > In any case, do you see the delay as problematic? A 30 second delay > should be tolerable, even during a Q&A session, if the questions are > submitted by IRC or the Q&A sidebar in Hangouts. > > -Tom > > -- > Tom Metro > The Perl Shop, Newton, MA, USA > "Predictable On-demand Perl Consulting." > http://www.theperlshop.com/ > _______________________________________________ > Discuss mailing list > [email protected] > http://lists.blu.org/mailman/listinfo/discuss > -- John Abreau / Executive Director, Boston Linux & Unix Email [email protected] / WWW http://www.abreau.net / PGP-Key-ID 0x920063C6 PGP-Key-Fingerprint A5AD 6BE1 FEFE 8E4F 5C23 C2D0 E885 E17C 9200 63C6 _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
