>> Also, if you are testing lipsync, have you looked at the blipflash producer
> and consumer? The producer generates a synchrinized blip and flash pattern. > And > the consumer can calculate the lip sync offset given that pattern as an input: >> >> melt -silent -profile dv_ntsc blipflash out=200 -consumer libdv:temp.dv > terminate_on_pause=1 >> melt -silent -profile dv_ntsc libdv:temp.dv -consumer blipflash > terminate_on_pause=1 > > Oh yeah, I heard about this, never got around to trying it till just > now. very cool - thanks. > > as long as we are doing so good on the quickies here... > > What i am currently testing for is gaps in audio so I need more than > the blip. can I get mix the > "producer noise" with it? It would look something like this: melt noise -track blipflash -transition mix a_track=0 b_track=1 The blipflash consumer should be able to detect the blips as long as the gain on the noise isn't too high. > It is OK if that confuses the blipflash test, so far sync is on the > order of 10 seconds after well over 12 hours, (currently the steam > gets reset every 4 hours, and no one has noticed the sync problem) > but the audio drops are for a few seconds when I transition between > sources - very noticeable and disruptive. (this is a problem in > flumotion/gstreamer, not mlt) Sine wave test tones are very useful for detecting audio frame loss because when an audio frame is lost, it creates a discontinuity in the tone that is easy for the human ear to detect. The ladspa producer can produce arbitrary sine waves if you need it. Good luck finding your problem. ~Brian ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
