LIBRE PLANET 2015 is here....!!

29 respostas [Última entrada]
lap4fsf
Desconectado
Joined: 10/12/2014

Hello all,

This year's LIBREPLANET conference is scheduled on March 21-22 at MIT Stata Center, Cambridge, MA.

Official site[1]

If you plan to participate remotely, please bookmark this link[2] and check back during the conference.

[1] https://libreplanet.org/2015/
[2] https://libreplanet.org/2015/live/

Spread the word....!!

a_slacker_here
Desconectado
Joined: 06/29/2013

Damn it, I have work to do this weekend.

Anyone knows if someone is going to record the conferences and keep them for the people that cannot go?

ssdclickofdeath
Desconectado
Joined: 05/18/2013

I hope they actually record the conference this time, so we have something to watch besides lousy 10 FPS streamdumps.

tomlukeywood
Desconectado
Joined: 12/05/2014

i am going and ill try and record it i have a 12 megapixel camera with about 1 hour and 30 minits of video so as its
too days i could get about 3 hours

lap4fsf
Desconectado
Joined: 10/12/2014

+1

I have dropped a mail to Libby Reinish (Campaigns Manager at FSF), asking whether FSF can record this years conference for non-recipients.

In fact, last year's Libre Planet conference is available in GNU MediaGoblin[1]. So possibly they *MIGHT* use the channel for this year as well.

If you plan to record the conference sessions, use a free media format for that like Ogg(Vorbis/Theora)[2].
And share it in the community....!!

[1] http://media.libreplanet.org/
[2] https://www.fsf.org/campaigns/playogg/

tomlukeywood
Desconectado
Joined: 12/05/2014

"If you plan to record the conference sessions, use a free media format for that like Ogg(Vorbis/Theora)[2]."

my camera is sadly using the mpeg 4 format but i will convert it to ogg/webm before sharing

do you know of a camera that records to ogv?

ssdclickofdeath
Desconectado
Joined: 05/18/2013

There is a company called Elphel that makes cameras that record in the Theora format, but they are very expensive. As far as I am aware, no major camera manufacturers make cameras that support that format.

lap4fsf
Desconectado
Joined: 10/12/2014

+1 to ssdclickofdeath.

@Tomlukeywood: You can use OggConvert. (Main menu > Sound & Video > OggConvert)

As suggested by ssdclickofdeath, Elphel is quite expensive, but they are approved by FSF[1].

You can visit their website over here[2].

(Courtesy to lembas for the URLs.)
[1] https://www.fsf.org/blogs/community/elphel-camera
[2] http://www3.elphel.com/index.php

Magic Banana

I am a member!

Desconectado
Joined: 07/24/2010

OggConvert's last release is almost five years old. I doubt it is still maintained. And OggConvert is quite limited. IMHO, Trisquel 8 should ship Transmageddon, which is far more complete feature-wise (any free audio/video codec, rotation, etc.).

onpon4
Desconectado
Joined: 05/30/2012

If I were you, I'd share both the MPEG-4 video, and a WebM (not Ogg Theora) conversion. VP8 is better than Theora.

tomlukeywood
Desconectado
Joined: 12/05/2014

"VP8 is better than Theora."
why?

also i will share both ogg and mpeg-4 for the unfortunate iexplore.exe/safari users
i do this on my website with html5 video using this code:
http://pastebin.com/8ATgm7LB

ssdclickofdeath
Desconectado
Joined: 05/18/2013

VP8 uses more efficient compression.

tomlukeywood
Desconectado
Joined: 12/05/2014

dose anyone know how to convert mpeg-4 to ogv? i tried the ogg converter program but i kept crasing and gave this cli error when i tried to convert the file:
*** Error in `/usr/bin/python': double free or corruption (fasttop): 0xb4711790 ***
Aborted

i normally use this website(works without javascript):
http://video.online-convert.com/convert-to-ogg

but the file is 2.9gb making it very hard to upload

are there any alternative programs to the ogg converter that comes with trisquel?

ssdclickofdeath
Desconectado
Joined: 05/18/2013

You could try using Transmageddon. It's in the repos. I'm encoding a test video with it and it seems to work so far. I'd recommend converting to VP8/WebM instead (also supported by Transmageddon.)

EDIT: The conversion worked fine.

onpon4
Desconectado
Joined: 05/30/2012

I should note that using that website to convert a video is SaaSS (Service as a Software Substitute), and should be avoided:

https://www.gnu.org/philosophy/who-does-that-server-really-serve.html

gnuvideoro
Desconectado
Joined: 06/15/2014

Hi tomlukeywood, the conversion to OGG or WebM is quite easy with ffmpeg or libav-tools. FFmepg can be found in Trisquel 6 repositories and libav-tools is available in Trisquel 7 repositories.

So the command lines for installation are :

- for FFmpeg
sudo apt-get install ffmpeg

- for libav-tools
sudo apt-get install libav-tool

Fot conversion the commands are the following, depending on what program you want to use.

- with FFmepg

ffmpeg -i filename.mpg final.ogg
ffmpeg- i filename.mpg final.webm

- with libav-tools

avconv -i filename.mpg final.ogg
avconv -i filename.mpg final.webm

Where „filename” is the name of the input file and „video” is the name of the output file (you can name it however you want).

Hope that helps.

tomlukeywood
Desconectado
Joined: 12/05/2014

thanks for the replys i have found transmagedon video transcoder
seems to be working but i am currently on a x60 thinkpad with a 1.66ghz single core cpu with 2gb of ram
and its doing about 1mb per 2 minits :(

so i will wait until i get back home with my 8 core i7 cpu
and 16gb of ram!

ssdclickofdeath
Desconectado
Joined: 05/18/2013

Additionally, I'd recommend scaling the video down if you recorded it in 1080p. This can be done easily in avconv/ffmpeg (read the manpage.)

Calinou
Desconectado
Joined: 03/08/2014

VP9 is better than both VP8 and Fedora. It's 2015, we can afford to use it now.

onpon4
Desconectado
Joined: 05/30/2012

The version of Transmageddon in Trisquel 7 doesn't support VP9 yet.

Magic Banana

I am a member!

Desconectado
Joined: 07/24/2010

Can we? Do you have any time to report (e.g., to encode a one-hour 720p video)?

marioxcc
Desconectado
Joined: 08/13/2014

Pixel count doesn't tells one much about image quality. For video, it's even less meaningful. Search about “megapixel myth”. Most cameras store video at 1920×1080 or below (even if the sensor takes more samples) which is ~2.1 millions of pixels.

Bear in mind that pixel count is just the spatial sampling frequency (assuming no digital resampling/resizing has been applied). It doesn't makes much sense to sample at a super high frequency if the image has no high frequency components to capture, if it is overexposed, motion-blurred, full of noise, and so on.

For images, a good exposure, a good lens, lighting conditions and sensor noise have an higher impact in image quality.

There is no point in worrying about how many megapixels your camera has if it's going to down sample and lose 83 % of the pixel count when recording video.

Here are a bit of terms to search if you are interested in knowing more:

(Bi-dimensional) Fourier transform
Modulation transfer function
Image noise
Focus
Diffraction
Circle of confusion
Depth of field
Exposure
Aperture
Vignetting
Chromatic aberration
Optical aberration
Sensor size
JPEG artifact

Regards.

Edit: Add “(Bi-dimensional)”

Sachin
Desconectado
Joined: 06/02/2012

now i know how to nail someone bragging about their camera

pogiako12345
Desconectado
Joined: 07/11/2014

LibrePlanet is almost over! Karen's talk upcoming! :D Looking forward to coming to next year's LibrePlanet.

pogiako12345
Desconectado
Joined: 07/11/2014

How was LP guys? I bet everyone's at the party venue drinking and stuff! :D

tomlukeywood
Desconectado
Joined: 12/05/2014

libreplanet was very good i flashed my x200 (that i got from the fsf store) with a beaglebone
or someone else showed me how to do it

there were lots of good talks that were recorded and i assume will soon be uploaded
but i missed the icecat talk as i was flashing libreboot :(

i diddnt go to the party venu as i was way to tired partly due to jet lag

but i discoverd that theres a rely good juice bar near central square, cambridge that has awesome carrot and celery and ginger juice! (best drink ever )

also remember to remove the 3g modems that come with the x200's
they have direct memory acsess and a propietry os
so it could be a hardware backdoor

also as its a 3g modem its trackable in the same way as a phone is trackable

i gave myn to someone who liked killing them with hammers!

lembas
Desconectado
Joined: 05/13/2010

Survey & recordings

If you physically attended LibrePlanet 2015, please fill out the feedback survey so the conference can be made even better next year! https://libreplanet.org/2015/feedback

There are some recordings available at
* http://mtjm.eu/releases/lp2015/
* http://nixnodes.net/vid/libreplanet_2015/

I believe many of the sessions got recorded locally but have no idea when and where the videos will appear.

a_slacker_here
Desconectado
Joined: 06/29/2013

I hope somebody recorded the icecat conference made by Ruben.

onpon4
Desconectado
Joined: 05/30/2012

Unfortunately, I didn't get to see any of the talks live because of my job. Hopefully more of them will be uploaded somewhere than last year's...

pizzaiolo
Desconectado
Joined: 03/12/2015

RMS's keynote speech was uploaded and can be seen at https://nixnodes.net/tmp/RMS_keynote_libre.ogv