Hi, On Sun, 2010-10-17 at 01:02 +0530, Yuvi Panda wrote: > Hi! > > I'd like to help implement > https://bugzilla.gnome.org/show_bug.cgi?id=572449. I should disclose > that I'm being paid to do this - mostly from FSF India (they want to > use PiTiVi for localizing screencasts/videos and this feature would > tremendously help them). > > What would be the best way to expose this in the UI? I'm thinkin of: > > 1. Place marker at start of video in timeline > 2. Go to Project -> Capture from Microphone > 3. Dialog pops up, with recording options (Pause, Record, Stop, > Replay) and a small meter indicating current audio input levels > 4. A checkbox couples the controls on the dialog box with the ones for > playback of the existing composition (So 'record' will start playing > back the composition, pause will pause it, rewind will rewind the > composition back to the marker placed in step 1) > 5. User finishes recording, at which point the recording is placed > beginning at the marker placed in (1) > > Does this make sense? Anyone with a better idea of how to go about this?
Wim added an example recently to gst-plugins-base regarding the proper way to do synchronized recording with playback: http://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/tests/examples/playrec The trick is to put both the timeline playback (in the example that would be the audiotestsrc ! autoaudiosink part) and microphone recording (autoaudiosrc ! fakesink) in the same pipeline. I'd recommend using the ASYNC VERSION. Then when the pipeline is pre-rolled (in paused), seek to the required timeline position (i.e. where you want to start recording over), wait for preroll again, and then set to PLAYING when you're ready to record. As for the format... I'd recommend recording to raw audio (i.e. just use wavenc ! filesink) in that pipeline and then convert to a compressed format later on (either just after the recording and before adding to the timeline, *or* not at all and just have it re-compressed when rendering the timeline). I'd recommend trying to modify that -base example with some basic elements ("uridecodebin ! autovideosink" and "autoaudiosrc ! queue ! wavenc ! filesink") and the seeking features before trying to integrate everything into pitivi. There might be some unseen issues popping up. Edward > > Thanks :) ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ Pitivi-pitivi mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/pitivi-pitivi
