chopping sounds with AudioStreamTrack about aiortc HOT 2 CLOSED

I tried MediaPlayer() as well, it can play the .wav file properly.
I looked into the code, and found out that there's a resampler inside.

But in my use case, the audio data is sent in streaming (one chunk for one video frame), so I cannot use MediaPlayer.

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Solved.

@jlaine Seems like aiortc wouldn't create sdp offer according to specific tracks. I added an audio track with sample rate 16k and ptime 40ms to peerconnection, but the generated offer still contains the default atributes:

m=audio 61921 UDP/TLS/RTP/SAVPF 96 0 8
c=IN IP4 2.0.0.1
a=sendrecv
a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
a=extmap:2 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=mid:1
a=msid:7efcc2eb-a421-41b5-8aed-dd5914c45052 b3c4a814-0993-42bb-a5d6-fb32d37c902d
a=rtcp:9 IN IP4 0.0.0.0
a=rtcp-mux
a=ssrc:2645354522 cname:eee68eb0-1a58-49c2-9fe7-a6ab3c3db647
a=rtpmap:96 opus/48000/2
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000

I simply changed the line:

def change_sdp(sdp):
    target = 'a=rtpmap:96 opus/48000/2'
    update = 'a=rtpmap:96 opus/16000/1\r\na=fmtp:96 minptime=40;useinbandfec=1'
    return sdp.replace(target, update)

And the sound can be played properly.

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