Using Mplayer With Video API - Revision history

84.9.45.94 at 16:04, 29 December 2005

2005-12-29T16:04:20Z

← Older revision		Revision as of 16:04, 29 December 2005
Line 1:		Line 1:
	{{en\|ru=Using_Mplayer_With_Video_API.Ru\|cn=Using_Mplayer_With_Video_API.cn}}		{{en\|ru=Using_Mplayer_With_Video_API.Ru\|cn=Using_Mplayer_With_Video_API.cn}}

	Video API ~~allow~~ to obtain the video stream by HTTP and RTP/UDP. In ~~difference from~~ the Axis cameras, the Elphel cameras can ~~obtain~~ the MJPG stream or Theora stream by the RTP protocol.		The Video API allows you to obtain the video stream by HTTP and RTP/UDP. In contrast to the Axis cameras, the Elphel cameras can receive the MJPG stream or Theora stream using the RTP protocol.

	==HTTP==		==HTTP==
	~~It's~~ example of command for MPJPG format stream ~~obtaining~~ from camera (Elphel, Axis etc):		Here is an example of a command for obtaining an MPJPG format stream from the camera (Elphel, Axis etc):
	<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/mjpg/video.mjpg</nowiki>		<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/mjpg/video.mjpg</nowiki>

	If you want to obtain the stream with ~~the~~ non-~~specify~~ parameters, ~~the~~ small trick is necessary. In fact, the '''lavf''' ~~obtain~~ the stream as MPJPG ~~when~~ the file name or URL ~~have~~ extension ".mjpg" at the end. Therefore to URL it is necessary to add ~~the~~ fictitious parameter with extension ".mjpg", for example:		If you want to obtain the stream with non-specific parameters, a small trick is necessary. In fact, the '''lavf''' receives the stream as MPJPG whenever the file name or URL has the extension ".mjpg" at the end. Therefore in the URL it is necessary to add a fictitious parameter with the extension ".mjpg", for example:
	<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768&bogus.mjpg</nowiki>		<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768&bogus.mjpg</nowiki>

	~~Also~~ MPlayer can play ~~the~~ files which is the ~~recorded~~ MJPG stream. For example, the stream was saved by this way:		MPlayer can also play files which are recorded from the MJPG stream. For example, if the stream was saved this way:
	<nowiki>$wget http://192.16.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768 -O video.mjpg</nowiki>		<nowiki>$wget http://192.16.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768 -O video.mjpg</nowiki>
	with fps value 6, you can play this file by the ~~next~~ way:		with fps value 6, you can play this file in the following way:
	<nowiki>$mplayer -fps 6 -demuxer lavf video.mjpg</nowiki>		<nowiki>$mplayer -fps 6 -demuxer lavf video.mjpg</nowiki>

Line 18:		Line 18:
	===MJPG===		===MJPG===
	====Multicast====		====Multicast====
	In standard Axis Video API there is no possibility ~~for obtaining~~ multicast stream by RTSP. But there is possibility ~~for~~ SDP-file ~~obtaining~~ and obtain stream on the SDP base.		In the standard Axis Video API there is no possibility to receive the multicast stream by RTSP. But there is the possibility to recieve the SDP-file and obtain the stream on the SDP base.

	You can ~~obtain~~ the SDP-file from address:		You can receive the SDP-file from the address:

	<nowiki>http://192.168.0.9/mjpg/media.sdp</nowiki>		<nowiki>http://192.168.0.9/mjpg/media.sdp</nowiki>

	After that you can play stream:		After that you can play the stream:

	<nowiki>$mplayer sdp://media.sdp</nowiki>		<nowiki>$mplayer sdp://media.sdp</nowiki>

	or save ~~into the~~ file:		or save as a file:
	<nowiki>$mencoder -fps 2 sdp://media.sdp -ovc copy -o my.avi</nowiki>		<nowiki>$mencoder -fps 2 sdp://media.sdp -ovc copy -o my.avi</nowiki>

	Unfortunately, you must specify the fps for ~~correctness of~~ mencoder work, although ~~in sdp-file~~ this parameter is present.		Unfortunately, you must specify the fps for mencoder to work correctly, although this parameter is already present in the SDP file.

	====Unicast====		====Unicast====
	It is possible to address to camera's RTSP-server by using the RTSP-protocol and ~~obtain~~ the unicast video stream.		It is possible to address the camera's RTSP-server by using the RTSP-protocol and receive the unicast video stream.

	===Theora===		===Theora===

Ilya at 20:55, 24 December 2005

2005-12-24T20:55:32Z

← Older revision		Revision as of 20:55, 24 December 2005
Line 1:		Line 1:
	{{en\|ru=Using_Mplayer_With_Video_API.Ru\|cn=Using_Mplayer_With_Video_API.cn}}		{{en\|ru=Using_Mplayer_With_Video_API.Ru\|cn=Using_Mplayer_With_Video_API.cn}}

	Video API ~~позволяет принимать видеопоток как по~~ HTTP~~, так и~~ RTP/UDP. ~~Нужно сказать~~, ~~что в отличии от камер Axis камеры~~ Elphel ~~по RTP могут принимать поток~~ MJPG ~~или~~ Theora.		Video API allow to obtain the video stream by HTTP and RTP/UDP. In difference from the Axis cameras, the Elphel cameras can obtain the MJPG stream or Theora stream by the RTP protocol.

	==HTTP==		==HTTP==
	~~Пример команды получающей поток в формате~~ MPJPG ~~с камеры~~ (Elphel, Axis etc) :		It's example of command for MPJPG format stream obtaining from camera (Elphel, Axis etc):
	<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/mjpg/video.mjpg</nowiki>		<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/mjpg/video.mjpg</nowiki>

	~~Если нужно принять поток с произвольными параметрами~~, ~~то нужно идти на небольшую хитрость~~. ~~Дело в том~~, ~~что~~ '''lavf''' ~~воспринимает поток как~~ MPJPG~~, только если в конце имени файла или~~ URL ~~стоит расширение~~ ".mjpg". ~~Поэтому к~~ URL ~~нужно добавить фиктивный параметр c расширением~~ ".mjpg", ~~например так~~ :		If you want to obtain the stream with the non-specify parameters, the small trick is necessary. In fact, the '''lavf''' obtain the stream as MPJPG when the file name or URL have extension ".mjpg" at the end. Therefore to URL it is necessary to add the fictitious parameter with extension ".mjpg", for example:
	<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768&bogus.mjpg</nowiki>		<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768&bogus.mjpg</nowiki>

	~~mplayer может также воспроизводить файлы, с сохраненным~~ MJPG ~~потоком~~. ~~Например~~, ~~поток был сохранен таким образом~~ :		Also MPlayer can play the files which is the recorded MJPG stream. For example, the stream was saved by this way:
	<nowiki>$wget http://192.16.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768 -O video.mjpg</nowiki>		<nowiki>$wget http://192.16.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768 -O video.mjpg</nowiki>
	и fps ~~был равен~~ 6, ~~то можно это файл воспроизвести так~~ :		with fps value 6, you can play this file by the next way:
	<nowiki>$mplayer -fps 6 -demuxer lavf video.mjpg</nowiki>		<nowiki>$mplayer -fps 6 -demuxer lavf video.mjpg</nowiki>

Line 18:		Line 18:
	===MJPG===		===MJPG===
	====Multicast====		====Multicast====
	~~В стандартном~~ Axis Video API ~~нет возможности получить~~ multicast ~~поток по~~ RTSP. ~~Но есть возможность получения~~ SDP-~~файла и на основе его принять поток~~.		In standard Axis Video API there is no possibility for obtaining multicast stream by RTSP. But there is possibility for SDP-file obtaining and obtain stream on the SDP base.

	~~Получить~~ SDP-~~файл можно по адресу~~ : ~~<nowiki>http://192.168.0.9/mjpg/media.sdp</nowiki>~~		You can obtain the SDP-file from address:

	~~После этого можно воспроизвести поток~~ :		<nowiki>http://192.168.0.9/mjpg/media.sdp</nowiki>

			After that you can play stream:

	<nowiki>$mplayer sdp://media.sdp</nowiki>		<nowiki>$mplayer sdp://media.sdp</nowiki>

	~~или сохранить в файл~~ :		or save into the file:
	<nowiki>$mencoder -fps 2 sdp://media.sdp -ovc copy -o my.avi</nowiki>		<nowiki>$mencoder -fps 2 sdp://media.sdp -ovc copy -o my.avi</nowiki>
	~~К сожалению~~ mencoder ~~требует для правильной работы указания fps~~, ~~хотя в~~ sdp-~~файле этот параметр присутствует~~.
			Unfortunately, you must specify the fps for correctness of mencoder work, although in sdp-file this parameter is present.

	====Unicast====		====Unicast====
	~~Можно обратиться по протоколу~~ RTSP к RTSP-~~серверу в камере и получить~~ unicast ~~видео-поток~~.		It is possible to address to camera's RTSP-server by using the RTSP-protocol and obtain the unicast video stream.

	===Theora===		===Theora===

Ilya at 17:07, 24 December 2005

2005-12-24T17:07:18Z

New page

{{en|ru=Using_Mplayer_With_Video_API.Ru|cn=Using_Mplayer_With_Video_API.cn}}

Video API позволяет принимать видеопоток как по HTTP, так и RTP/UDP. Нужно сказать, что в отличии от камер Axis камеры Elphel по RTP могут принимать поток MJPG или Theora.

==HTTP==
Пример команды получающей поток в формате MPJPG с камеры (Elphel, Axis etc) :
<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/mjpg/video.mjpg</nowiki>

Если нужно принять поток с произвольными параметрами, то нужно идти на небольшую хитрость. Дело в том, что '''lavf''' воспринимает поток как MPJPG, только если в конце имени файла или URL стоит расширение ".mjpg". Поэтому к URL нужно добавить фиктивный параметр c расширением ".mjpg", например так :
<nowiki>$mplayer -fps 6 -demuxer lavf http://192.168.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768&bogus.mjpg</nowiki>

mplayer может также воспроизводить файлы, с сохраненным MJPG потоком. Например, поток был сохранен таким образом :
<nowiki>$wget http://192.16.0.9/axis-cgi/mjpg/video.cgi?resolution=1024x768 -O video.mjpg</nowiki>
и fps был равен 6, то можно это файл воспроизвести так :
<nowiki>$mplayer -fps 6 -demuxer lavf video.mjpg</nowiki>

==RTP==
===MJPG===
====Multicast====
В стандартном Axis Video API нет возможности получить multicast поток по RTSP. Но есть возможность получения SDP-файла и на основе его принять поток.

Получить SDP-файл можно по адресу : <nowiki>http://192.168.0.9/mjpg/media.sdp</nowiki>

После этого можно воспроизвести поток :

<nowiki>$mplayer sdp://media.sdp</nowiki>

или сохранить в файл :
<nowiki>$mencoder -fps 2 sdp://media.sdp -ovc copy -o my.avi</nowiki>
К сожалению mencoder требует для правильной работы указания fps, хотя в sdp-файле этот параметр присутствует.

====Unicast====
Можно обратиться по протоколу RTSP к RTSP-серверу в камере и получить unicast видео-поток.

===Theora===