something wrong with cooperating with video

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Hi,

I am using the alsa driver on the arm linux platform, when the system are decoding or encoding video with ffmpeg(using vpu driver), the data of sound which are read from alsa driver may be randomly incorrect, almost all the wrong data are 0xffff or 0x81C0. It is a independent thread to read the sound data.

Any suggestions would be appreciated.

BR,
JunLiu
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