[Live-devel] Creating live tsx file or Updating existing TSX file

[Chapman, Michael J]

Sorry I didn’t clarify this in an earlier post, but one of the goals we were hoping to achieve is the ability to have any rtsp client able to connect to our Media Server and perform these commands. So, we were hoping to not have to develop and use a custom client if possible. For instance, having VLC player (merely as an example) connect to our Media Server and perform the near-real time trick play. I hope that makes sense and better clarifies our goal. That is why we are looking into the tsx file generation possibilities.

Thank you,

Michael Chapman

From: live-devel [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Jeff Shanab
Sent: Monday, November 17, 2014 9:09 AM
To: LIVE555 Streaming Media - development & use
Subject: Re: [Live-devel] EXTERNAL: Re: Creating live tsx file or Updating existing TSX file

That seems similar to security video and if it is really just the recent past, can be done entirely in the client. It may be preferred for the smooth transition from now to recent-past and back to realtime.

Note: You would only cache uncompressed video. I maintained 2 gops worth decoded and the rest however many seconds configured.
 ( I had my own http based server that served out gops of video so I could play both directions and have random access to the video. I only put things in containers on "export" I streamed to a player of my own design so I was not streaming rtsp, I streamed multiple protocols including my own http one from the same rtsp input. A bit odd, but it worked)

On Mon, Nov 17, 2014 at 10:44 AM, Chapman, Michael J <michael.j.chapman at lmco.com<mailto:michael.j.chapman at lmco.com>> wrote:
Ross,

The video streams we are dealing with for our project mainly involve Unmanned Aerial Vehicle (UAV) video footage which comes to us as a video stream over the network. Due to the nature of the video, we need to be able to view it as soon as possible. We have an option to view it live from the source (non-rtsp approach with no trick play features) and we also want to be able to view the video footage in near-real time via rtsp. The benefit of the rtsp approach is that each user can have a unique rtsp session of the video with the intent of near-real time trick play. If an analyst sees something of interest in the video, they need to ability to rewind (or at least seek backwards) a few seconds before the video segment of interest to verify the footage. The ability to re-verify a video segment in the recent past, while watching the near-real time video, is why we would like to have this Live555 Indexing feature.

Also, these videos will remain archived and available via rtsp for future analysis, so we will be using the rtsp and trick play options after the video is completely received. We are just hoping that we could use a live indexing rtsp feature for the near-real time analysis use case instead of creating a custom caching of the video until the video is fully received and indexed. As the video stream we are receiving may be very long (may be up to or more than an hour is some cases), we cannot realistically index the file as we are receiving it without the requested feature.

Thank you,

Michael Chapman


From: live-devel [mailto:live-devel-bounces at ns.live555.com<mailto:live-devel-bounces at ns.live555.com>] On Behalf Of Ross Finlayson
Sent: Sunday, November 16, 2014 1:07 PM
To: LIVE555 Streaming Media - development & use
Subject: EXTERNAL: Re: [Live-devel] Creating live tsx file or Updating existing TSX file

I am recording a transport stream file that needs to support rtsp trick play as it is being recorded

People often ask for this feature, and I'm a bit puzzled by it.  What specific 'trick play' operations do you want the server to be able to perform on the Transport Stream file while it is still growing?  (I'm trying to understand whether/when this actually makes sense.)


Is it possible to create the tsx file as I am recording and continue indexing as new data if received (so having the indexer block and wait for new data) while also having that partially complete tsx file be used with the Live555MediaServer for trick play?

I may well end up adding this feature - but first, I'd need to get a feel for how much it makes sense (thus my question above).
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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