Sound volume is very low when playing mkv file

longkas longkas at gmail.com
Thu May 23 11:53:54 UTC 2019


Hello,
Another problem, after I raise the volume, I encode the audio with AAC, but
when I playback there's broken or noisy sound:

#no problem pipeline
gst-launch-1.0 -v filesrc location=d:/file.mkv ! decodebin ! audioconvert !
audioresample ! audio/x-raw,rate=48000 ! volume volume=10.0 !  autoaudiosink

#noisy pipeline
gst-launch-1.0 -v filesrc location=d:/file.mkv ! decodebin ! audioconvert !
audioresample ! audio/x-raw,rate=48000 ! volume volume=10.0 ! voaacenc !
avdec_aac ! audioconvert ! audioresample ! autoaudiosink

By replacing voaacenc to avenc_aac can improve the issue, but it still
happens, what's the problem here,
I tried to add queue, increase  encoder bitrate, no help.  
I tried to using mp3 encoder, even worse, so how does volume=10.0 causes
that´╝č

BR



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