Streaming Video With RaspberryPi - Revision history

Alban: /* B. Start capture in a screen */

2015-03-05T23:18:58Z

B. Start capture in a screen

← Older revision		Revision as of 23:18, 5 March 2015
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	<code>[ -d /tmp/capture ] \|\| mkdir /tmp/capture; rm -f /tmp/capture/* && cd /tmp/capture/ && \		<code>[ -d /tmp/capture ] \|\| mkdir /tmp/capture; rm -f /tmp/capture/* && cd /tmp/capture/ && \
	raspivid -ih -t 0 -w 1280 -h 720 -b 1000000 -pf baseline -o - \| /usr/local/bin/ffmpeg -~~f alsa~~ -itsoffset 6.5 -ac 1 ~~-i hw:1~~ -acodec aac -strict -2 \		raspivid -ih -t 0 -w 1280 -h 720 -b 1000000 -pf baseline -o - \| /usr/local/bin/ffmpeg -i hw:1 -itsoffset 6.5 -ac 1 -acodec aac -strict -2 -f alsa \
	-i - -vcodec copy -f segment -segment_list out.list -segment_list_flags +live -segment_list_size 5 -segment_time 4 -segment_time_delta 3 %10d.ts</code>		-i - -vcodec copy -f segment -segment_list out.list -segment_list_flags +live -segment_list_size 5 -segment_time 4 -segment_time_delta 3 %10d.ts</code>

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	# We pipe the content into ffmpeg with following parameters:		# We pipe the content into ffmpeg with following parameters:
	## ALSA Input		## ALSA Input
	~~###<code> -f alsa </code> (format) We use <code>alsa</code> for usb audio capture~~
	###<code> -itsoffset 6.5 </code> (time offset) '''This one is a trick''' We noticed our RPi B+ had a 6.5 seconds delay to start the audio, so this is used to resync audio. Tweak.		###<code> -itsoffset 6.5 </code> (time offset) '''This one is a trick''' We noticed our RPi B+ had a 6.5 seconds delay to start the audio, so this is used to resync audio. Tweak.
	###<code> -ac 1 </code> (number of audio channels) We used a mono input, so <code>1</code> was the right choice. Tweak		###<code> -ac 1 </code> (number of audio channels) We used a mono input, so <code>1</code> was the right choice. Tweak
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	###<code> -strict -2 </code> Argument mandatory for AAC format		###<code> -strict -2 </code> Argument mandatory for AAC format
	## Video Input		## Video Input
			###<code> -f alsa </code> (format) We use <code>alsa</code> for usb audio capture
	###<code> -i - </code> (input) '''DONT CHANGE''' Use the Standard input		###<code> -i - </code> (input) '''DONT CHANGE''' Use the Standard input
	###<code> -vcodec copy</code> (video codec) '''DONT CHANGE''' Use the video codec from the RPi. Not enough CPU to do anything else.		###<code> -vcodec copy</code> (video codec) '''DONT CHANGE''' Use the video codec from the RPi. Not enough CPU to do anything else.

Alban: /* For laptop or server */

2015-03-04T11:25:55Z

For laptop or server

← Older revision		Revision as of 11:25, 4 March 2015
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	</pre>		</pre>

	== ~~For~~ laptop or server ==		== Compiling FFMPEG for laptop or server ==

	Your default debian might come with sufficent support but if you want total control, compiling is a good idea.		Your default debian might come with sufficent support but if you want total control, compiling is a good idea.
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	<pre>		<pre>
	sudo		sudo
	aptitude update && aptitude install screen pkg-config yasm ffmpeg libass-dev libavcodec-extra libfdk-aac-dev libmp3lame-dev libopus-dev libtheora-dev libvorbis-dev libvpx-dev libx264-dev		aptitude update
			aptitude install screen pkg-config yasm ffmpeg libass-dev libavcodec-extra libfdk-aac-dev libmp3lame-dev libopus-dev libtheora-dev libx11-dev libvorbis-dev libvpx-dev libx264-dev
	cd /usr/src		cd /usr/src
	git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git		git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git
	cd ffmpeg		cd ffmpeg
	./configure --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab \		./configure --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
	&& make\		make
	&& make install		make install
	</pre>		</pre>

Alban: /* For laptop or server */

2015-03-04T11:23:14Z

For laptop or server

← Older revision		Revision as of 11:23, 4 March 2015
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	git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git		git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git
	cd ffmpeg		cd ffmpeg
	./configure --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab		./configure --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab \
	make		&& make\
	make install		&& make install
	</pre>		</pre>

Alban: /* For Raspberry */

2015-01-28T16:33:53Z

For Raspberry

← Older revision		Revision as of 16:33, 28 January 2015
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	git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git		git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git
	cd ffmpeg		cd ffmpeg
	./configure --enable-gpl --enable-libx264 --enable-libfdk-aac		./configure --enable-nonfree --enable-gpl --enable-libx264 --enable-libfdk-aac
	make		make
	make install		make install

Vincib: /* D. Broadcast from server to icecast */

2015-01-18T00:29:13Z

D. Broadcast from server to icecast

← Older revision		Revision as of 00:29, 18 January 2015
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	* You '''MUST''' have access to an icecast server. If you use a datacenter server, everything can run locally		* You '''MUST''' have access to an icecast server. If you use a datacenter server, everything can run locally

	<code> php /usr/local/bin/stream.php \| ffmpeg -i - -f ogg - \| oggfwd -p -n "My RaspberryPi Stream" <stream.server.com> 8000 mySecretIceCastStreamingPassword /test </code>		<code> php /usr/local/bin/stream.php \| ffmpeg -i - -r 12 -s 640x360 -vb 1000k -f ogg - \| oggfwd -p -n "My RaspberryPi Stream" <stream.server.com> 8000 mySecretIceCastStreamingPassword /test </code>

	'''What's happening here'''		'''What's happening here'''
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	#<code> \| ffmpeg </code> Pipe into FFMPEG		#<code> \| ffmpeg </code> Pipe into FFMPEG
	##<code> -i - </code> (input) '''DON'T CHANGE''' Use Standard In as input		##<code> -i - </code> (input) '''DON'T CHANGE''' Use Standard In as input
			##<code> -r 12</code> number of images per second (recommended: low values for live streaming)
			##<code> -s 640x360</code> width and height of the video. You need to keep the same ratio but 640x360 is good for low-bandwidth live streaming
			##<code> -vb 1000k </code> video bitrate in bps. use 400 for ~512Kbps video streaming
	##<code> -f ogg </code> (format) '''DON'T CHANGE''' Use ogg as output format		##<code> -f ogg </code> (format) '''DON'T CHANGE''' Use ogg as output format
	##<code> - </code> (output) '''DON'T CHANGE''' Output to Standard Out		##<code> - </code> (output) '''DON'T CHANGE''' Output to Standard Out

Vincib: /* Raspicam basics */

2015-01-18T00:20:08Z

Raspicam basics

← Older revision		Revision as of 00:20, 18 January 2015
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	A very simple tutorial : http://www.raspberrypi-spy.co.uk/2013/05/capturing-hd-video-with-the-pi-camera-module/		A very simple tutorial : http://www.raspberrypi-spy.co.uk/2013/05/capturing-hd-video-with-the-pi-camera-module/

			Note: when using 1920x1080, the raspicam take those pixel at the center of the captor. When using smaller definitions, it's using all the 5mpixels and extrapoling down to your requested definition. As a result, a 1280x720 video looks "unzoomed" compared to a 1920x1080, the latter having more grain in the picture too. '''tl;dr: use 1280x720 maximum''' ;)

	= Solution =		= Solution =

Vincib: /* Solution 2 : FLVSTR + PHP Streamer */

2015-01-17T23:42:27Z

Solution 2 : FLVSTR + PHP Streamer

← Older revision		Revision as of 23:42, 17 January 2015
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	'''Basic idea''' ~~the~~ Octopuce company has a solution to convert live MP4 to F4V. With an USB audio card, we could mux the MP4 and AAC audio and have a standalone solution.		'''Basic idea''' Octopuce company has a solution to convert live MP4 to F4V. With an USB audio card, we could mux the MP4 and AAC audio and have a standalone solution not needing any laptop.

	'''CON''' ~~authentification is hard~~, F4V means Flash, requires an USB disk for local backup		'''CON''' authentication not included as of now (only IP address), F4V means Flash, requires an USB disk for local backup. Also, the live stream will need to have the same bitrate as the recorded one.

	~~'''PRO'''~~ the ~~pi can be autonomous~~

	~~First, authentification. This problem is adressed by solving encryption~~ as ~~well: we use an SSL socket to communicate with~~ the ~~server~~.

			'''PRO''' the pi can be autonomous (no need for a laptop to encode the live stream)

			First, authentication. This problem is adressed by solving encryption as well: we use an SSL socket to communicate with the server. (we could use rsync server mode too).

	== Solution 3 : RTSP ==		== Solution 3 : RTSP ==

Vincib: /* Solution 1 : OGG/VORBIS + Icecast */

2015-01-17T23:38:15Z

Solution 1 : OGG/VORBIS + Icecast

← Older revision		Revision as of 23:38, 17 January 2015
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	# Use the PI to capture video as h264, merge audio from usb and use ffmpeg to produce MPEGTS "chunks"		# Use the PI to capture video as h264, merge audio from usb and use ffmpeg to produce MPEGTS "chunks"
	# Rsync the chunks to a laptop or a server (note : the audio mix ~~can~~ be ~~done on the laptop~~)		# Rsync the chunks to a laptop or a server (note : the audio mix should be integrated here to ensure a good audio/video synchronization)
	# Assemble the chunks and pipe them in ffmpeg		# Assemble the chunks and pipe them in ffmpeg
	# Ask ffmpeg to convert this into ogg		# Ask ffmpeg to convert this into ogg

Vincib: /* References */

2015-01-17T23:37:33Z

References

← Older revision		Revision as of 23:37, 17 January 2015
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	Here are a number of unsorted links		Here are a number of unsorted links

	http://techzany.com/2013/09/live-streaming-video-using-avconv-and-a-raspberry-pi/		* http://techzany.com/2013/09/live-streaming-video-using-avconv-and-a-raspberry-pi/
			* http://blog.cloudfrancois.fr/category/streaming-video.html

Vincib: /* Solution 4 : HLS + RSYNC */

2015-01-17T23:31:09Z

Solution 4 : HLS + RSYNC

← Older revision		Revision as of 23:31, 17 January 2015
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	2. Run a capture : <code>raspivid -ih -pf baseline -t 0 -b 1000000 -w ~~1080~~ -h 720 -v -o - \| ffmpeg -i - -f alsa -ac 1 -itsoffset 6.5 -i hw:1 -acodec aac -strict -2 -vcodec copy out.m3u8 </code>		2. Run a capture : <code>raspivid -ih -pf baseline -t 0 -b 1000000 -w 1280 -h 720 -v -o - \| ffmpeg -i - -f alsa -ac 1 -itsoffset 6.5 -i hw:1 -acodec aac -strict -2 -vcodec copy out.m3u8 </code>

	3. Run a cron rsync to server (todo)		3. Run a cron rsync to server (todo)