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我的应用使用ffmpeg来解析mms streaming缓冲区,并使用音频队列来播放缓冲数据。现在我可以确认缓冲数据是好的,但我无法播放它。打球的结构是基于AudioFileStreamExample演示的客户端,它可以起到HTTP流(AudioFileStreamExample演示的服务器)。我注意到在回调函数:AudioQueue得到一个错误的数据包?
void MyPacketsProc(void *inClientData, UInt32 inNumberBytes,
UInt32 inNumberPackets, const void *inInputData,
AudioStreamPacketDescription *inPacketDescriptions),
当我直接播放AudioFileStreamExample演示的HTTP流,帕拉姆inNumberPackets
是在大部分时间大于1;当我播放mms流时,inNumberPackets
始终为1. audioQueue只播放第一个数据包,所有最后一个数据包都错过了。
日志使用AudioFileStreamExample演示的HTTP流:
*AudioStreamBasicDescription info ----*
SampleRate :44100.000000
FormatID :778924083
FormatFlags :0
BytesPerPacket :0
FramesPerPacket :1152
BytesPerFrame :0
ChannelsPerFrame :2
BitsPerChannel :0
got data. bytes: 1253 packets: 2
packetSize:626
kAQBufSize:24576
bytesFilled:0
packetSize:627
kAQBufSize:24576
bytesFilled:626
got data. bytes: 627 packets: 1
packetSize:627
kAQBufSize:24576
bytesFilled:1253
使用解析的彩信日志流:
*AudioStreamBasicDescription info ----*
SampleRate :48000.000000
FormatID :1819304813
FormatFlags :12
BytesPerPacket :4
FramesPerPacket :1
BytesPerFrame :4
ChannelsPerFrame :2
BitsPerChannel :16
got data. bytes: 4498 packets: 1
packetSize:216
kAQBufSize:24576
bytesFilled:0
got data. bytes: 1090 packets: 1
packetSize:576
kAQBufSize:24576
bytesFilled:216
got data. bytes: 3064 packets: 1
packetSize:576
kAQBufSize:24576
bytesFilled:792
got data. bytes: 3978 packets: 1
packetSize:252
kAQBufSize:24576
bytesFilled:1368
我不知道如何解决这个问题。看来MyPacketsProc
函数得到错误的参数,但如何得到修复呢?
非常感谢。