In an H264 elementary stream, the framerate could be defined in the SPS, but
this is an optional field (see ISO 14496-10).
Regards,
Michel.
[@@ THALES GROUP INTERNAL @@]
De : live-devel [mailto:live-devel-boun...@ns.live555.com] De la part de Deanna
Earley
Envoyé : mardi 2 décembre 2014 10:14
À : 'LIVE555 Streaming Media - development & use'
Objet : Re: [Live-devel] Playback Speed
H.264 is a video frame encoding format. It has no concept of time.
You need to write out as one of the standard file containers to make a standard
file.
I think LiveMedia has sinks for various types like Matroska and MP4.
This will give you the metadata like format, length, framerate, resolution, etc.
--
Deanna Earley | Lead developer | icatchercctv
w: www.icode.co.uk/icatcher<http://www.icode.co.uk/icatcher> | t: 01329 835335
| f: 01329 835338
Registered Office : 71 The Hundred, Romsey, SO51 8BZ. Company Number : 03428325
From: live-devel [mailto:live-devel-boun...@ns.live555.com] On Behalf Of Mark
Bondurant
Sent: 01 December 2014 18:11
To: 'LIVE555 Streaming Media - development & use'
Subject: Re: [Live-devel] Playback Speed
Oh. I didn't know that. I assumed it had to be part of the h264 headers (one or
the other). Is there any way, that's comprehensible to my newb video skillset,
to add that to my filesink, as in perhaps an example in one of the test
programs?
From: live-devel [mailto:live-devel-boun...@ns.live555.com] On Behalf Of Deanna
Earley
Sent: Thursday, November 27, 2014 1:07 AM
To: 'LIVE555 Streaming Media - development & use'
Subject: Re: [Live-devel] Playback Speed
Play in what?
Raw H.264 streams have no “speed” encoded with them, so you’d need to find a
way to specify that in your player, or use a container (like AVI, mp4, etc)
that stores the extra metadata.
The player is probably assuming a 25fps.
--
Deanna Earley | Lead developer | icatchercctv
w: www.icode.co.uk/icatcher<http://www.icode.co.uk/icatcher> | t: 01329 835335
| f: 01329 835338
Registered Office : 71 The Hundred, Romsey, SO51 8BZ. Company Number : 03428325
From: live-devel [mailto:live-devel-boun...@ns.live555.com] On Behalf Of Mark
Bondurant
Sent: 25 November 2014 17:23
To: 'LIVE555 Streaming Media - development & use'
Subject: [Live-devel] Playback Speed
I'm encountering a curious problem with payback speed. I'm pulling an RTSP play
stream from my cameras, copying the NAL's, prepending them with the start code,
as contiguous GOP units straight to disk, headers and all. And they play fine.
Just at double speed. The camera is set to NTSC/H264/CIF/12 fps/Constant Bit
Rate/0.125 Mbps. Any ideas what I'm doing wrong?
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