<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">Hi!</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> </div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">I have tested several .wav files that contains mono audio (here attaches for example)</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">and I try to playback them with GStreamer.</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">I have been having no problem to handle mp3, m4a, webm .. and many other formats that contains high quality stereo audio.</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">But the problem is those low quality (8bit, 8000Hz, mono) audio..</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> </div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">I have tried with …</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> >>> Works but sounds really bad comparing with os default player gst-launch-1.0 filesrc location=./test_media/infloop.wav ! decodebin ! autoaudiosink >>> Any other tries failed. gst-launch-1.0 filesrc location=./test_media/infloop.wav ! decodebin ! audioconvert ! volume ! autoaudiosink Setting pipeline to PAUSED ...Pipeline is PREROLLING ... ** (gst-launch-1.0:7333): WARNING **: Invalid channel positions ** (gst-launch-1.0:7333): WARNING **: Invalid channel positionsERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstWavParse:wavparse0: Internal data flow error.Additional debug info:gstwavparse.c(2249): gst_wavparse_loop (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstWavParse:wavparse0:streaming task paused, reason not-negotiated (-4)ERROR: pipeline doesn't want to preroll.Setting pipeline to NULL ... ** (gst-launch-1.0:7333): WARNING **: Invalid channel positionsFreeing pipeline ... Since I can not attach audioconvert and any other plugins I can not properly manipulate it.</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">Can anybody can tell me how i can properly manipulate those files for playback/transcoding?</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> </div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;">Many thanks in advance.</div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> </div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> </div><div id="bloop_customfont" style="color: rgb(0, 0, 0); margin: 0px;"> </div> <div id="bloop_sign_1446426137374205184" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px"> </div></div></body></html>