3gp video recorded by my HTC Desire phone plays fine in the standard Movie Player application that comes with Ubuntu 12.04, but in Digikam's preview mode, the video is accompanied only by a terrible screeching sound as if the audio stream has been corrupted. Reproducible: Always
Video preview is delegate to phonon KDE component. Gilles Caulier
Please try this command and see if it can be reproduced: gst-launch playbin2 uri=file:///path/to/file
Closing for lack of feedback. Please feel free to reopen if you can reproduce this with Phonon 4.6.0 or later and provide the requested feedback.