2008.RMLL.info recording - Revision history

Beug: /* Streaming */

2008-06-24T23:54:30Z

Streaming

← Older revision		Revision as of 23:54, 24 June 2008
Line 181:		Line 181:

	===Streaming===		===Streaming===


			Finally to stream for the world we use icecast2 server.

			Send the ogg/theora files with oggfwd like this.


			<pre>
			cat final.ogg \| oggfwd ip_of_icecast_server port password /stream.ogg
			</pre>

			Of course you need to configure icecast2 server before.

Beug: /* Transcoding to Theora/Vorbis */

2008-06-24T23:51:35Z

Transcoding to Theora/Vorbis

← Older revision		Revision as of 23:51, 24 June 2008
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	===Transcoding to Theora/Vorbis===		===Transcoding to Theora/Vorbis===


			For the the transcoding we use ffmpeg2theora ( minimum version 0.19 ) to encode the mjpeg and oggvorbis on the ogg/theora file.

			<pre>
			cat sync.ogg \| ffmpeg2theora -p preview -o final.ogg -
			</pre>

	===Streaming===		===Streaming===

Beug: /* Muxing audio with video */

2008-06-24T23:49:23Z

Muxing audio with video

@@ Line 150: / Line 150: @@
 ===Muxing audio with video===
 ===Transcoding to Theora/Vorbis===
 ===Streaming===

Beug: /* Recording video */

2008-06-24T23:43:32Z

Recording video

← Older revision		Revision as of 23:43, 24 June 2008
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	===Recording video===		===Recording video===

			We've got different way to record video from elphel camera. The newest way to record is camogm/cam2ogm but we need nfs server or hard drive directly connected to the camera but we don't have camera with harddrive and nfs server is not what i prefer.. We can also use ElphelOgm but we are some artefact with this so i choose to use classic mencoder way to record video like this :

			<pre>
			mencoder rtsp://ipcamera:554 -ovc copy -fps 24.99 -frames 250000 -o outputv.avi

			</pre>

			the option frames 250000 produce approximatively 2 hours of video on 1920x1088 format.

	===Muxing audio with video===		===Muxing audio with video===

Beug: /* Recording audio */

2008-06-24T23:35:18Z

Recording audio

← Older revision		Revision as of 23:35, 24 June 2008
Line 78:		Line 78:

	===Recording audio===		===Recording audio===

			To record audio there is new elphel cam with USB where you can plug USB microphone ( recommended SAMSON USB MIC ) BUT
			she is not avaivable for this events :( so we need to find solution to record audio.

			The solution is a computer ... :(


			For this we need standard computer with soundcard alsa compatible and gstreamer-0.10 software.
			To record audio i use this scripts made by luxigo.

			<pre>
			#!/bin/sh

			# audio settings
			AUDIO_DEVICE="hw:0,0"
			AUDIO_BITRATE=48000

			# output file name
			OUTFILE="out.ogg"

			DEBUG="-v -m"

			gst-launch-0.10 $DEBUG \
			\
			oggmux name=mux \
			! filesink location="$OUTFILE" \
			\
			fdsrc fd=0 \
			! queue \
			! oggparse \
			! oggdemux \
			! ogmvideoparse \
			! mux. \
			\
			alsasrc \
			device="$AUDIO_DEVICE" \
			! queue \
			! audioconvert \
			! vorbisenc bitrate=$AUDIO_BITRATE \
			! mux.

			# Description of the gst-launch command above:

			# - the muxed stream (the output from the oggmux element) will be
			# stored in a file (filesink)

			# - The video comes from ElphelOgm through stdin (fdsrc fd=0).
			# - The ogg stream is parsed for security (optional?) and demuxed.
			# - The ogmvideo stream is also parsed for security (optional?).
			# - The resulting mjpeg stream is sent to the ogg muxer through the
			# "mux." element (defined with "oggmux name=mux").
			# (This syntax could also be used for oggdemux but here there's only
			# a single stream in the incoming ogg container so we dont need to
			# complicate things here)

			# - The sound comes from an alsa device through alsasrc,
			# - The sound is converted in a suitable format then encoded in vorbis,
			# before being muxed with the video stream
			</pre>

	===Recording video===		===Recording video===

Beug: /* FreeSoftware */

2008-06-24T23:23:40Z

FreeSoftware

← Older revision		Revision as of 23:23, 24 June 2008
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	==FreeSoftware==		==FreeSoftware==

			List of freesoftware needed to record video/audio, mux and stream.


			Of course standard GNU/Linux

			mencoder to record video

			gstreamer-0.10 to record audio

			ogmmerge from ogmtools to mux ogg vorbis sound produce by gstreamer and mjpeg video from mencoder

			ffmpeg2theora to encode on theora ( minimum version is 0.19 )

			oggfwd to send video and icecast server

			icecast2 for streaming the ogg/theora file



			On standard ubuntu 7.10 i've got all this software with apt-get.

	==Ubuntu Desktop==		==Ubuntu Desktop==

Beug: /* Pure-Data patch */

2008-06-24T23:06:42Z

Pure-Data patch

← Older revision		Revision as of 23:06, 24 June 2008
Line 47:		Line 47:

	===Pure-Data patch===		===Pure-Data patch===


			Here there is a simple patch for pure data to record, mux sound and stream on icecast server.
			You can download this patch here :

			http://community.elphel.com/files/elencode.pd

			Change the path of your need and launch this with pd name_you_choose.pd

	===Recording audio===		===Recording audio===

Polto at 12:03, 23 June 2008

2008-06-23T12:03:39Z

← Older revision		Revision as of 12:03, 23 June 2008
Line 31:		Line 31:

	If we do want to mux, transcode and stream in realtime a core2duo or quadro 2.4 Ghz and with 2GB RAM minimum is more welcome.		If we do want to mux, transcode and stream in realtime a core2duo or quadro 2.4 Ghz and with 2GB RAM minimum is more welcome.

			=Microphones=

			=Tripods=

	=Network=		=Network=

Polto at 00:50, 23 June 2008

2008-06-23T00:50:32Z

New page

=Prefix=
We had some contacts with organizers of http://2008.rmll.info/?lang=en and decided to participate recording all conferences with Elphel NC353L network cameras.

=Goals=
The goal is:

* record all the conferences in high resolution. (from 640x480 to 1920x1080p)
* restream few conferences in real time
* upload ALL conferences on RMLL site and google video and as many support as possible.
* keep high quality 1920x1080p MJPEG sources for all conferences what will be post processed.
* have at least 1 camera per conference room and 2-4 camera for a very important conferences what will be post processed.
* do all that with exclusively FreeSoftware

=Hardware=
This section will describe used hardware.

==Cameras==
We will bring 14 cameras with lenses and POE injectors.

===POE injectors===
We will bring POE injectors with us.

===Lenses===
We will use Computar H2Z0414C-MP Varifocal Lens, 4-8mm F1.4 Manual Iris Vari-Focal C-Mount, 3MPix. We will have 10-12 of such lense + 2 5MPix fisheyes. Maybe we will have some other good quality lenses.

==PC==

===Requirement===

If we do not want to stream or transcode in live a X40 IBM thinkpad or equivalent is OK.

If we do want to mux, transcode and stream in realtime a core2duo or quadro 2.4 Ghz and with 2GB RAM minimum is more welcome.

=Network=

=Software=

==FreeSoftware==

==Ubuntu Desktop==

==Special scripts for recording==

===Pure-Data patch===

===Recording audio===

===Recording video===

===Muxing audio with video===

===Transcoding to Theora/Vorbis===

===Streaming===