Stream.record() keyframe issues

Question

I have an application that uses server side recording using the Stream.record() method. The source for the Stream class is a live stream that several clients can publish to or view. Only one client can talk at a time but they can stop and start publishing when they like. Stream.record() allows me to handle recording from these different sources into a single server file. The code looks no different that that seen elsewhere on this forum or indeed in the Adobe documentation (FMIS3.0.4) and is something like this;
To start the recording;
application.recording =  Stream.get("recorded_stream");
if (application.recording) {
   application.recording.play("live_stream");
   application.record("append");
and to stop the recording;
if (application.recording) {
   application.recording.play(false);
   application.recording.record(false);
And on the client a NetStream.publish("live_stream","live") or NetStream.play("live_stream") are issued depending on whether the client is talking to a group of clients or listening to one of the other clients.
Now this code works provided, it seems, the first recorded section is greater than some interval around 30 seconds otherwise the keyframe metadata (as reported by YAMDI) has large gaps at irregular intervals that cause stalls during playback. You can see in the metadata output from YAMDI that the filepositions are consistent (all the data is there) but as there are large gaps (like up to 20 seconds) in the keyframe entries anything that plays it stalls, also the duration in the metadata includes the gaps.
I have tried using FLVCHECK and it says the files are fine. I have tried making each recorded segment into its own file (with the intention of joining them with FFMPEG post process) but it makes no difference, the playback stall manifests itself as a gap at the start of one of the movies and FFMPEG uses the metadata it finds so it can't help.
The second related issue is that the keyframeinterval and framerate of the recorded file don't relate to those requested by the client at all. In this case I am asking for 15fps with a keyframe every second and I am getting 7-11fps that and 4-5 keyframes per second. Also neither of these figures match the system wide defaults in the Application.xml file. In this particular application the system will be used to record British Sign Language exchanges and I need to keep the framerate and image quality high an although I can understand why the server would want to fix its framerate/interval (as its recording from different client sources) I can't find anywhere in the docs where these values can be set abd the dont relate to the settings in the Application.xml file for this app either. BTW the server running FMS3.0.4 is a quad-core XEON with 16GB through a 100Mbit switch that does nothing else so its not a resource issue !!
Anyone done anything similar or had a simlar problem? I guess the weird part in my app is that usually Stream.record() seems to be used for injecting live custom metadata or for recording live broadcasts from FME both of which probably aren't going to switch stream sources so quickly so maybe this is a bug?
thanks for reading this,
Andy Freeman
Correspondent Corp

Answer 1

Hi, there may be a component test for the keyboard in the F2 UEFI Diagnostics that you could try, I pasted the instructions from the manual below: To start HP PC Hardware Diagnostics UEFI: Turn on or restart the computer, quickly press esc, and then press F2