SpaceX Falcon 9 v1.1 - Jason 3 - SLC-4E Vandenberg - Jan 17, 2016 - DISCUSSION

[intrepidpursuit]

Here's a youtube mirror of the NASA TV media stream, it seems to be stable;

The NASA TV youtube streams have half the framerate of normal video. Not sure why. If you can deal with that, have at it.

Here are the _two_ spaceX streams that will start later. These won't have framerate issues.

I would guess NASA TV uses an interlaced format which can't be easily encoded. Easiest to just take two interlace passes and turn it into a single progressive frame. Thus half the frame rate.

[ClayJar]

For everyone's convenience, I collected all the streams I know of in one table:

NASA TV
Public	YouTube	Ustream	direct stream
Media	YouTube	Ustream	direct stream
Educational	YouTube	Ustream	direct stream
SpaceX
With Hosts	YouTube	LiveStream
No Hosts	YouTube
Other re-streams
Spaceflight Now		LiveStream

(The "direct stream" URL can be opened by VLC or your favorite streaming-capable app.  They're the streams from the NASA TV page.)

[Prober]

so funny....just hit the last SX feed and got this

[Helodriver]

What time does the fog usually burn off?

Based on my experience here, when there are high cirrus clouds like today that prevent the sun from coming through the fog at the coast can be very persistent, sometimes not burning off at all.  Perhaps as the rain band offshore moves in closer it will stir a ground level wind which can help, but sometimes not.

Very good chance we're not going to be seeing much   High mountain locations might get the only views.  Im going to go out myself shortly, so we'll see.

[Prober]

What time does the fog usually burn off?

Based on my experience here, when there are high cirrus clouds like today that prevent the sun from coming through the fog at the coast can be very persistent, sometimes not burning off at all.  Perhaps as the rain band offshore moves in closer it will stir a ground level wind which can help, but sometimes not.

Very good chance we're not going to be seeing much   High mountain locations might get the only views.  Im going to go out myself shortly, so we'll see.

You've got some decent camera skills; we will be watching for it.

[rickl]

High mountain locations might get the only views.  Im going to go out myself shortly, so we'll see.

I was reading a website last night where a woman said she lives 20 miles from Vandenberg and will drive to the top of a nearby mountain to watch the launch.  I'm sooo jealous.   

Being on the East Coast, I'll have to make do with the webcast.

[Dante80]

CG posted on reddit.

[the_other_Doug]

The NASA TV youtube streams have half the framerate of normal video. Not sure why. If you can deal with that, have at it.

I've used all of the various feeds at different times, and I've never noticed the framerate issue you mention on the YouTube feed.  I don't think there is a designed-in difference; I think that, for some reason, you've seen what looks like a framerate issue and have assumed it affects everyone in the same way.

Streamed media has issues from a large variety of factors.  I've seen people complain that NASA TV feeds have gone down and it's awful that *no one* got to see the launch (or EVA, or whatever) while I, for example, had an excellent feed from the same source that never wavered.

I guess I'm just saying that not everyone has seen the issue you mention, so you may want to qualify such comments with phrases like "for me" or "on my system."  Wouldn't want someone to miss the event because they didn't think a feed that would have actually performed fine for them would work.  My advice is to try all the feeds and use the one that works best for you.

[mlindner]

The NASA TV youtube streams have half the framerate of normal video. Not sure why. If you can deal with that, have at it.

I've used all of the various feeds at different times, and I've never noticed the framerate issue you mention on the YouTube feed.  I don't think there is a designed-in difference; I think that, for some reason, you've seen what looks like a framerate issue and have assumed it affects everyone in the same way.

Streamed media has issues from a large variety of factors.  I've seen people complain that NASA TV feeds have gone down and it's awful that *no one* got to see the launch (or EVA, or whatever) while I, for example, had an excellent feed from the same source that never wavered.

I guess I'm just saying that not everyone has seen the issue you mention, so you may want to qualify such comments with phrases like "for me" or "on my system."  Wouldn't want someone to miss the event because they didn't think a feed that would have actually performed fine for them would work.  My advice is to try all the feeds and use the one that works best for you.

It's been that way for me since NASA started streaming on youtube. I would prefer to use the youtube streams personally. Also I'm quite certain it's embedded into the stream itself as when I rip from the NASA TV youtube stream the low framerate remains. It's likely a mistake on their end on the video encoding. It's a subtle effect though so some people may not notice it. I deal with video a lot so its quite obvious to me. (Also of note, no other youtube streams have this issue, only NASA TV's.)

[Herb Schaltegger]

I'm getting a nice stable ~2 megabit/sec stream on the NASA public Youtube feed in 480p. Switching to 720p gives me ~7-8 mbps - AT&T Gigabit fiber to the house. YMMV depending on ISP and network traffic, obviously.

[NovaSilisko]

The Youtube SpaceX streams seem to still be set to start at T-0, am I the only one who sees that?

[mlindner]

I'm getting a nice stable ~2 megabit/sec stream on the NASA public Youtube feed. YMMV.

The stream is stable for me, just the encoded framerate is half. It doesn't drop in and out, it just is constant half framerate.

Edit: I ripped the youtube stream again just to check. Video output from my player:

[vd] Container reported FPS: 14.987978

Not quite half framerate but roughly half framerate. It's an error on NASA's end.

[the_other_Doug]

so funny....just hit the last SX feed and got this

Says one hour now.  Seems like it's rounding to the nearest hour...

[Mapperuo]

SpaceX picked the wrong time to have a 2nd 'Rocket views' live stream. Can't see anything right now.

[Dante80]

Since this is a v1.1 launch, we will be able to hear the T-13:00 terminal count call. This may be the last opportunity we will have in years to come from SpaceX livestreams (since the new Falcon 9 does the count at T-38:00, before the livestream starts).

Hope that NASA missions include them in the future via NASAtv.

[NovaSilisko]

so funny....just hit the last SX feed and got this

Says one hour now.  Seems like it's rounding to the nearest hour...

For me though it specifically lists a 42-past-the-hour start time which is... launch time.

[mlindner]

so funny....just hit the last SX feed and got this

Says one hour now.  Seems like it's rounding to the nearest hour...

For me though it specifically lists a 42-past-the-hour start time which is... launch time.

Probably an error. They'll likely force the stream to start before that time.

[Kryten]

Youtube stream start times are only when the streamers expects to start, they don't start automatically.

[ClayJar]

On the SpaceX Livestream link is a note:

SpaceX webcast will go live here and on YouTube at about 1:15pm ET/10:15am PT.

[OnWithTheShow]

...And the NASA commentator just said "Atlas Launch Control"....