Real-time conversion pcm problem of voice stream in speex format

[mulzhang]

I now have a need to obtain the voice stream in speex format in real time, sampleRate: 16000, channelCount: 1, read a byte with a fixed length of 300 and call Decode to convert pcm, but audio data loss and noise appear in the pcm file after conversion.

1. May I ask how much length of byte conversion should I set?
2. When inputting different byte lengths, an error message appears, for example: More than two wideband layers found. What parameters do I need to adjust?
   I hope you can help me solve this problem as soon as possible, I wish you a happy life, thank you!