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rbpitch Needs Testing!
Now that rbpitch has been in the wild for a few days, the code has begun to settle down. I found a few bugs since I first blogged about it, but those bugs are squashed.
Only one minor issue remains, and it is really a bug in the GStreamer 'pitch' plugin (libgstsoundtouch), a part of gst-plugins-bad. There is absolutely no way I can work around this bug within the rbpitch code, so when I have some time I will try to address the bug at the source of the problem, no pun intended. Hint: if you don't normally seek within songs (that is, change the current playback position), you won't notice this bug at all.
I have greatly simplified the instructions for building rbpitch on Ubuntu, and these instructions may also work on recent versions of Debian, but are untested there. I have tested these instructions on Ubuntu 9.10 and found them to work.
You can find my instructions post and call for testing on the Ubuntu Forums.
3 comments
The debug output of rhythmbox showed the following when I tried to enable the plugin:
(15:00:03) [0x1429500] [rb_module_init] rb-module.c:140: RBModule 0x2c54000 initialising
(15:00:03) [0x1429500] [rb_module_load] rb-module.c:72: Loading /usr/lib/rhythmbox/plugins/rbpitch/librbpitch.so
(rhythmbox:28371): Rhythmbox-WARNING **: `register_rb_plugin': /usr/lib/rhythmbox/plugins/rbpitch/librbpitch.so: undefined symbol: register_rb_plugin
(rhythmbox:28371): Rhythmbox-WARNING **: Could not load plugin rbpitch
(15:00:03) [0x1429500] [rb_module_finalize] rb-module.c:148: RBModule 0x2c54000 finalising
(rhythmbox:28371): Rhythmbox-WARNING **: Error, impossible to activate plugin 'Pitch and Tempo Shifting'
(15:00:03) [0x1429500] [plugin_manager_set_active] rb-plugin-manager.c:296: Could not activate Pitch and Tempo Shifting.
This was on Debian Stable: Linux version 2.6.26-2-amd64 (Debian 2.6.26-19lenny2) using Rhythmbox 0.11.6
I hope the info is useful for you. If you need more info, let me know. I'll try the plugin on a Debian Unstable installation soon. I'll let you know how that worked out.
You'll need to follow the generic instructions for compiling it without the apt-get source. You can find those instructions in the README.txt as part of the git checkout. Here's a link to that file in git master:
http://tiyukquellmalz.org/cgit/rbpitch/tree/README.txt
Please post back if you can't get it to work with RB 0.12.5.
The only issue that I could find was with the time / slider. The slider position and elapsed time are updated according to the real time. When the tempo of a song is altered, the progress bar inidicates the wrong place in the song. But I assume this is caused by the bug in the libgstsoundtouch library mentioned in the original blog post.
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