Changing recording format isn't effective until relaunch the application

[brlin-tw]

Reproduce instructions

1. Launch application
2. Hit "Start recording"
3. Hit "Stop recording"
4. Change recording format via "Audio settings. > Format" dropdown menu
5. Hit "Start recording"

Current behavior

The application continues recording using the previous format

Expected behavior

The application record using the newly selected audio format

Additional information

There are also some GStreamer errors in the console output, not sure if it's related, though...

(audio-recorder:22887): GStreamer-CRITICAL **: _gst_util_uint64_scale: assertion 'denom != 0' failed

(audio-recorder:22887): GStreamer-CRITICAL **: gst_segment_to_running_time: assertion 'segment->format == format' failed

(audio-recorder:22887): GStreamer-CRITICAL **: gst_segment_to_stream_time: assertion 'segment->format == format' failed

(audio-recorder:22887): GStreamer-CRITICAL **: _gst_util_uint64_scale: assertion 'denom != 0' failed