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GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstAudioDecoder ╰── GstGSMDec
| name | sink | 
| direction | sink | 
| presence | always | 
| details | audio/x-gsm, rate=(int)8000, channels=(int)1 | 
| audio/ms-gsm, rate=(int)[ 1, 2147483647 ], channels=(int)1 | 
| name | src | 
| direction | source | 
| presence | always | 
| details | audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)1 |