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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I suppose I could intercept the SPS headers and substitute my own, but looking in the spec, I see no field specifying fps. It doesn't seem to me to be in the
spirit of the thing being as everything is so variable. GOP's can cover two seconds or half a second. Slices are very arbitrary.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I discovered that the frame rate doesn't seem to really matter to the size of the clips I produce, which makes sense. The reference frame is the big space hog.
I set the camera to 30fps, it's max with H264, and VLC Player seemed happy with that. It makes for nice smooth playbacks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> live-devel [mailto:live-devel-bounces@ns.live555.com]
<b>On Behalf Of </b>PROMONET Michel<br>
<b>Sent:</b> Thursday, December 04, 2014 11:04 AM<br>
<b>To:</b> LIVE555 Streaming Media - development & use<br>
<b>Subject:</b> Re: [Live-devel] Playback Speed<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">In an H264 elementary stream, the framerate could be defined in the SPS, but this is an optional field (see ISO 14496-10).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"> Michel.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">[@@ THALES GROUP INTERNAL @@]<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> live-devel [<a href="mailto:live-devel-bounces@ns.live555.com">mailto:live-devel-bounces@ns.live555.com</a>]
<b>De la part de</b> Deanna Earley<br>
<b>Envoyé :</b> mardi 2 décembre 2014 10:14<br>
<b>À :</b> 'LIVE555 Streaming Media - development & use'<br>
<b>Objet :</b> Re: [Live-devel] Playback Speed<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">H.264 is a video frame encoding format. It has no concept of time.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You need to write out as one of the standard file containers to make a standard file.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I think LiveMedia has sinks for various types like Matroska and MP4.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This will give you the metadata like format, length, framerate, resolution, etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">--
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">Deanna Earley |</span></b><span lang="EN-GB" style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F"> Lead developer <b>| </b></span><b><span style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:black">icatcher</span></b><b><span style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#FF9223">cctv</span></b><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">w:
</span><u><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#595959"><a href="http://www.icode.co.uk/icatcher">www.icode.co.uk/icatcher</a></span></u><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">
| t: 01329 835335 | f: 01329 835338</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Trebuchet MS","sans-serif";color:#919191">Registered Office : 71 The Hundred, Romsey, SO51 8BZ. Company Number : 03428325</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> live-devel [<a href="mailto:live-devel-bounces@ns.live555.com">mailto:live-devel-bounces@ns.live555.com</a>]
<b>On Behalf Of </b>Mark Bondurant<br>
<b>Sent:</b> 01 December 2014 18:11<br>
<b>To:</b> 'LIVE555 Streaming Media - development & use'<br>
<b>Subject:</b> Re: [Live-devel] Playback Speed<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> live-devel [<a href="mailto:live-devel-bounces@ns.live555.com">mailto:live-devel-bounces@ns.live555.com</a>]
<b>On Behalf Of </b>Deanna Earley<br>
<b>Sent:</b> Thursday, November 27, 2014 1:07 AM<br>
<b>To:</b> 'LIVE555 Streaming Media - development & use'<br>
<b>Subject:</b> Re: [Live-devel] Playback Speed<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Play in what?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The player is probably assuming a 25fps.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">--
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">Deanna Earley |</span></b><span lang="EN-GB" style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F"> Lead developer <b>| </b></span><b><span style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:black">icatcher</span></b><b><span style="font-size:10.5pt;font-family:"Trebuchet MS","sans-serif";color:#FF9223">cctv</span></b><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">w:
</span><u><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#595959"><a href="http://www.icode.co.uk/icatcher">www.icode.co.uk/icatcher</a></span></u><span style="font-size:9.0pt;font-family:"Trebuchet MS","sans-serif";color:#5E5E5F">
| t: 01329 835335 | f: 01329 835338</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Trebuchet MS","sans-serif";color:#919191">Registered Office : 71 The Hundred, Romsey, SO51 8BZ. Company Number : 03428325</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> live-devel [<a href="mailto:live-devel-bounces@ns.live555.com">mailto:live-devel-bounces@ns.live555.com</a>]
<b>On Behalf Of </b>Mark Bondurant<br>
<b>Sent:</b> 25 November 2014 17:23<br>
<b>To:</b> 'LIVE555 Streaming Media - development & use'<br>
<b>Subject:</b> [Live-devel] Playback Speed<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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. <i>
Just at double speed.</i> The camera is set to NTSC/H264/CIF/12 fps/Constant Bit Rate/0.125 Mbps. Any ideas what I'm doing wrong?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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