On date Monday 2009-11-02 14:18:07 -0500, Jeremy Mordkoff encoded: > Hi - > > Not new to ffmpeg, but new to lib avfilter. > > I am trying to build a tool to test lip sync - that is - is the audio > and video timestamped correctly so that they are rendered correctly in > time relative to each other. The simplest way to generate a test stream > is to play an audio only file of someone clapping their hands and use > windows-media player visualizer in one of the graphical modes so that > the graph jumps for each clap. The harder part is verifying the result. > > I would like to build a filter that overlays each frame with a volume > meter. That way I could simply verify that this volume meter jumps at > the same time as the graphic in the video stream. > > Is this possible? Anyone have a better idea?
This requires a filter with a video input and an audio output. Currently this is not possible, at least not in the libavfilter vfilters SOC repo, you may check the afilters repo corresponding to a SOC project of this summer, but I can't say which is its usability state, and I believe it's also badly outdated. Regards. _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
