Hi, As reported in Kdenlive issue 2841 (1), there is a problem with alsa devices in the avformat producer.
I can reproduce the problem in shotcut, so the problem is probably in MLT but I am not sure where. The problem happens when you want to use another device than "default". Let's say for example you want to use your first alsa device, the resource should be (according to the FFmpeg doc) "hw:0,0" instead of "default" In Kdenlive / shotcut, if you set the ALSA device to "hw:0,0", you can play / record fine. However, if you stop (for example play another clip) and try to open the same device again, you get the following error message: *** parse_url: protocol=alsa resource=hw:0,0 [alsa @ 0x149b400] cannot open audio device hw:0,0 (Device or resource busy) ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM alsa:hw:0,0 [alsa @ 0x149b400] cannot open audio device alsa:hw:0,0 (No such file or directory) producer_avformat_close *** There is no way to capture again after that unless you close the application. The problem does not appear when using "default" as ALSA device. I am not sure if the problem is in FFmpeg, or if it is caused be the resource having a ":" inside it that confuses MLT or something else. So if you have an idea... Regards jb (1) http://www.kdenlive.org/mantis/view.php?id=2841 ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Mlt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mlt-devel
