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Re: [gst-devel] How to create a video recording buffer from a live broadcast and read from it at the same time
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From: Zelalem S. <zel...@ho...> - 2010-11-26 09:40:54
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Hi Marco Ballesio thank you again for the support. Before I start to implement your proposals, I want to ask you some questions. Let me respond to your request first > only. Do you have special requirements about using SIP in your AS > media controller? No, I don't have. I can use RTSP. > Wim's rtsp streaming server will probably help you with all of this: Thank you. I'll download and check it. My questions are: - Is it possible to read from a file that is being written by another process? I mean the second server is going to read from teh file that the first server is writing to. > by periodically looping (through a timer) on the first server you may > implement a basic way to re-start the file each n minutes. Please clarify what you mean by restart the file. > More elegant ways may involve a valve element and transitions to NULL > state/eos for the filesink element only. What will this (valve) element do? Thank you. Best regards, - Zelalem S. > Date: Thu, 25 Nov 2010 19:59:05 +0200 > From: gib...@gm... > To: gst...@li... > Subject: Re: [gst-devel] How to create a video recording buffer from a live broadcast and read from it at the same time > > Hi, > > On Thu, Nov 25, 2010 at 3:33 PM, Zelalem Sintayehu <zel...@ho...> wrote: > > Hi Dear Marco Ballesio thank you for your prompt response. I'm a student and > > want to do this as a project. Basically I want to have a kind of network > > based recorder which is controlled by either SIP or RTSP from an application > > server. Those are the two protocols that I was thinking about to use. > > Currently I have an RTSP proxy that I developed which is controlled by a SIP > > Application Server (AS) and delivers the media to a client. So I want to > > extend it a little further so that when it is told to pause, it will pause > > the stream it gets from the server (which basically means recording it for > > later use) and again when told to resume starts the delivery from the place > > where it was paused. The client (a SIP) is just a passive media reciever. > > in my understanding it should be possible to do all of this with RTSP > only. Do you have special requirements about using SIP in your AS > media controller? > > > the media control comes from the application server. I also want to use a > > client with basic RTSP capability but still the media control comes from the > > AS or media controller. With regard to bandwith limitation I don't have > > badndwidth costraints, but I'm thinking that the recorder should have a > > limited (specified) buffer size. It can't go on recording forever. I also > > only want this to work for one client. Hope I have attended your queries. > > > > Once again thank you for your support. > > A few ideas. Disclaimer: I've not personally tried them, so your > mileage to get the thing working may vary.. > > Wim's rtsp streaming server will probably help you with all of this: > > http://people.freedesktop.org/~wtay/ > > in my understanding, you would need to setup two servers: > > - the first one streaming from the camera AND locally saving to file > (through, between the others, a tee element and an mp4mux with the > option "faststart" set to true). > > - the second one providing the file saved from the first one. > > by periodically looping (through a timer) on the first server you may > implement a basic way to re-start the file each n minutes. More > elegant ways may involve a valve element and transitions to NULL > state/eos for the filesink element only. > > Regards > > > > > Best regards, > > > > - Zelalem S. > > > > > > > > > >> Date: Thu, 25 Nov 2010 13:39:37 +0200 > >> From: gib...@gm... > >> To: gst...@li... > >> Subject: Re: [gst-devel] How to create a video recording buffer from a > >> live broadcast and read from it at the same time > >> > >> Hi, > >> > >> On Wed, Nov 24, 2010 at 12:13 PM, Zelalem Sintayehu > >> <zel...@ho...> wrote: > >> > Hi I want to create a program using gstreamer that when activated starts > >> > to > >> > record a live broadcast and when requested starts to deliver what is > >> > being > >> > recorded from the beginning of the record while keeping on recording on > >> > the > >> > other end (the live broadcast). At some point I want to ignore recording > >> > and > >> > go live. I hope gstreamer could be used to do this. Basically my problem > >> > is > >> > to create a buffer of a file that I can read and write into it at the > >> > same > >> > time. Please advice me how I can do this. > >> > >> Imo there are many ways for achieving this, some of which being easy, > >> other more difficult. The freedom you'll have in your design depends > >> on some variables: > >> > >> - You'll anyway have to use a signalling protocol (e.g. RTSP, SIP, > >> XMPP, etc..) to make it working, so you'll have to carefully pick the > >> one which better suits your requirements (e.g. RTSP is pretty well > >> supported from GStreamer from both sides, for SIP or XMPP I suggest > >> you to give a look to the telepathy framework). > >> > >> - Are you planning to make it compatible with standard clients? If > >> yes, which protocols do they use? If not, are you planning to write > >> the client application as well? > >> > >> - Do you have resource constraints (network bandwidth, CPU, disk, memory)? > >> > >> - Is it possible that multiple clients will connect to the same server? > >> > >> If you can clarify the points of above it would be possible to give > >> you, in turn, an appropriate answer. > >> > >> Regards > >> > >> > > >> > Thank you. > >> > > >> > Best regards, > >> > > >> > - Zelalem S. > >> > > >> > > >> > > >> > > >> > ------------------------------------------------------------------------------ > >> > Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! > >> > Tap into the largest installed PC base & get more eyes on your game by > >> > optimizing for Intel(R) Graphics Technology. Get started today with the > >> > Intel(R) Software Partner Program. 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Five $500 cash prizes are up for grabs. > > http://p.sf.net/sfu/intelisp-dev2dev > > _______________________________________________ > > gstreamer-devel mailing list > > gst...@li... > > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > > > > > > ------------------------------------------------------------------------------ > Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! > Tap into the largest installed PC base & get more eyes on your game by > optimizing for Intel(R) Graphics Technology. Get started today with the > Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. > http://p.sf.net/sfu/intelisp-dev2dev > _______________________________________________ > gstreamer-devel mailing list > gst...@li... > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |