【发布时间】:2026-02-24 01:55:02
【问题描述】:
如果我在进行视频通话时连续暂停和启动,我的应用程序会崩溃我使用以下代码暂停和恢复视频流。
PJSIP 版本:2.9
func pauseVideo(_ value: Bool) {
guard let id = SIPAccount.account?.calls.last?.call_id else { return }
let operation = value ? PJSUA_CALL_VID_STRM_STOP_TRANSMIT : PJSUA_CALL_VID_STRM_START_TRANSMIT
var param = pjsua_call_vid_strm_op_param()
pjsua_call_vid_strm_op_param_default(¶m)
param.med_idx = pjsua_call_get_vid_stream_idx(pjsua_call_id(id))
param.dir = value ? PJMEDIA_DIR_NONE : PJMEDIA_DIR_ENCODING_DECODING
pjsua_call_set_vid_strm(pjsua_call_id(id), operation, ¶m)
}
日志:
PJSIP_log: in pauseVideo
pjsua_vid.c Call 0: set video stream, op=5
vid_conf.c .Updating render state for port id 2 (1 sources)..
vid_conf.c .Created render state for connection 3->2
vid_conf.c .src#0=BGRA/352x288->352x264@0,12 dst=320x240@0,0
vid_conf.c .Port 3 (Front Camera) transmitting to port 2 (vstenc0x12c093028)
vstenc0x12c093028 .Encoder stream resumed
PJSIP_log: video pause status 0
vstenc0x12c093028 !Forcing encoder to generate keyframe
PJSIP_log: in pauseVideo
pjsua_vid.c !Call 0: set video stream, op=6
vstenc0x12c093028 .Encoder stream paused
vid_conf.c .Cleaned up render state for connection 3->2
vid_conf.c .Port 3 (Front Camera) stop transmitting to port 2 (vstenc0x12c093028)
PJSIP_log: video pause status 0
silencedet.c !Re-adjust threshold (in silence)to 0
PJSIP_log: in pauseVideo
pjsua_vid.c !Call 0: set video stream, op=5
strm0x12ca03228 !Jitter buffer starts returning normal frames (after 249 empty/lost)
strm0x12ca03228 Jitter buffer empty (prefetch=0), plc invoked
strm0x12ca03228 Start talksprut..
strm0x12ca03228 Starting silence
silencedet.c Re-adjust threshold (in silence)to 0
在pjsua_vid.c !Call 0: set video stream, op=5 应用程序挂起之后,这 3 行将被记录多次
strm0x12ca03228 Start talksprut..
strm0x12ca03228 Starting silence
silencedet.c Re-adjust threshold (in silence)to 0
【问题讨论】:
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请用 PJSIP 版本更新问题,以及附加日志和调用堆栈/堆栈跟踪。
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首先,确保您没有在 iOS 上使用 gcd (trac.pjsip.org/repos/wiki/Getting-Started/iPhone#gcd-crash)。然后,还提供堆栈跟踪,以便我们可以知道究竟是哪个函数发生了崩溃。
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@SauwMingLiong 使用 pjsua_schedule_timer2() 解决了我的问题,非常感谢您的帮助。 :)
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@Devansh Vyas 我在启动和停止电车时遇到同样的问题,我在哪里可以使用 pjsua_schedule_timer2
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@SonPham 我遇到了暂停视频的问题,可以通过以下方式解决:
func pauseVideo(_ value: Bool) { let valuePointer = UnsafeMutablePointer<Int8>(mutating: (value.description as NSString).utf8String) let valueRawPointer = UnsafeMutableRawPointer.init(valuePointer) pjsua_schedule_timer2(pauseCallback, valueRawPointer, 0) print("PJSIP_log: in pauseVideo") }