h.264 problem with AVI DV25

[jbarrales]

Hi,

I'm evaluating the h.264 encoder but I have run into a problem. I use the recoder app that comes with the SDK to generate a directshow graph to compress an AVI file in DV25 format to h.264. When I run the graph from inside recoder, everything works fine; however, if I run the graph from another program like GraphEdit or my own application, the video runs slower than real-time. I have tracked this error and there seems to be a problem with the extra input the the M71 muxer seems to generate automatically, because if I remove in GraphEdit, it works fine. I have tried to save this graph that does work and reload it again, but when I do that it comes back as before (with three input pins instead ot two). I would like to know if there is a way to configure the mux from inside an application without using the property pages. Thank you.

[Vovs]

It sounds like the problem cause is in the video encoder settings. The matter is that the multiplexer version that you use performs wrong PTS calculation for Н.264 streams encoded in the Field mode. In this case the multiplexer considers each field to be a frame. When such streams play, the decoder shows each field as if it is a frame (the same duration, which means it plays two times slower). A free input pin of М71 cannot be the cause of this problem.

We are aware of this problem, actually it has been fixed already. The fix will be provided in the next program release, which is supposed to happen pretty soon. It is still possible to set the muxer without the property page, all the instructions are provided in the SDK documentation, you may want to consider this option.