Hello, PJSIP community!
Question about H.264 encoder configuration still not closed!
I successfully build pj-project, downloaded from svn - revision 4025.
According to advices, given to me, about H.264 encoder configuration, I
added only ONE method to native code of revision 4025:
---------------------------------------------------------------------------------------------------------------
PJ_DEF(pj_status_t) setHD(void)
{
pj_status_t status;
const pj_str_t codec_id = {"H264", 4};
pjmedia_vid_codec_param param;
status = pjsua_vid_codec_get_param(&codec_id, ¶m);
if(status!= PJ_SUCCESS) {
//PJ_ERROR() get codec param
return status;
}
param.enc_fmt.det.vid.size.w = 1280;
param.enc_fmt.det.vid.size.h = 720;
param.enc_fmt.det.vid.fps.num = 5;
param.enc_fmt.det.vid.fps.denum = 1;
param.enc_fmt.det.vid.avg_bps = 1024000;
param.enc_fmt.det.vid.max_bps = 2048000;
status=pjsua_vid_codec_set_param(&codec_id, ¶m);
if(status!= PJ_SUCCESS){
//PJ_ERROR() set codec param
return status;
}
}
---------------------------------------------------------------------------------------------------------------
this method declared in ffmpeg_codecs.h
PJ_DECL(pj_status_t) setHD(void);
I do not need decoding at pjsua side - so I did not use configuration for
decoder param.dec_fmtp.param[0].name = pj_str("profile-level-id");
param.dec_fmtp.param[0].val = pj_str("42e033"); - this is really not needed
by me.
I call method setHD from method
static int main_func(int argc, char *argv[]) (file main.c)
after execution lines
if (app_init(argc, argv) != PJ_SUCCESS)
return 1;
Also I have to change one line in implementetion method
PJ_DEF(pj_status_t) pjmedia_vid_codec_h264_parse_fmtp(const
pjmedia_codec_fmtp *fmtp, pjmedia_vid_codec_h264_fmtp *h264_fmtp)
to stream REAL HD, but not 176x144(updated code):
/* When profile-level-id is not specified, use default value "42000A" */
if (h264_fmtp->profile_idc == 0) {
h264_fmtp->profile_idc = 0x42;
h264_fmtp->profile_iop = 0x00;
//h264_fmtp->level = 0x0A;
h264_fmtp->level = 0x1F;
}
SO my results:
1. Latency is more than 5 second and increasyng permanently after start
streaming.
2. video quality is not good - encoder works not stable: image become gray,
after that sharpness is not good for HD resolution.
QUESTION1: Why I cannot stream HD video with quality of 1 Mbps?
3. log of video call
[DISCONNCTD] To: sip:6003 at 192.168.2.134;tag=as152ce637
Call time: 00h:02m:40s, 1st res in 1132 ms, conn in 1885ms
#0 audio GSM @8kHz, sendrecv, peer=192.168.2.134:19994
SRTP status: Not active Crypto-suite: (null)
RX pt=3, last update:00h:00m:00.983s ago
total 7.8Kpkt 258.9KB (572.9KB +IP hdr) @avg=13.2Kbps/29.2Kbps
pkt loss=0 (0.0%), discrd=0 (0.0%), dup=0 (0.0%), reord=0 (0.0%)
(msec) min avg max last dev
loss period: 0.000 0.000 0.000 0.000 0.000
jitter : 0.125 6.267 12.250 5.750 1.190
TX pt=3, ptime=20, last update:00h:00m:01.061s ago
total 63pkt 2.0KB (4.5KB +IP hdr) @avg=105bps/234bps
pkt loss=3 (4.5%), dup=0 (0.0%), reorder=0 (0.0%)
(msec) min avg max last dev
loss period: 60.000 60.000 60.000 60.000 0.000
jitter : 37.750 115.367 264.125 38.000 55.454
RTT msec : 0.579 1.147 3.261 1.556 0.473
#1 video H264, sendrecv, peer=-
SRTP status: Not active Crypto-suite: (null)
RX pt=97, size=720x480, fps=22.00, last update:00h:00m:05.312s ago
total 0pkt 0B (0B +IP hdr) @avg=0bps/0bps
pkt loss=0 (0.0%), discrd=0 (0.0%), dup=0 (0.0%), reord=0 (0.0%)
(msec) min avg max last dev
loss period: 0.000 0.000 0.000 0.000 0.000
jitter : 0.000 0.000 0.000 0.000 0.000
TX pt=97, size=1280x720, fps=5.00, last update:00h:00m:00.310s ago
total 15.7Kpkt 20.23MB (20.86MB +IP hdr) @avg=1.03Mbps/1.06Mbps
pkt loss=7193 (31.4%), dup=0 (0.0%), reorder=0 (0.0%)
(msec) min avg max last dev
loss period: 0.000 2.031 4.000 3.000 0.951
jitter : 0.000 0.000 0.000 0.000 0.000
RTT msec : 1.632 7.245 19.287 2.334 4.540
QUESTION2: Why package loss is to high?
P.S.: I can decrease packege loss only after configured encoder with next
paramanters: 3 FPS, 64-128 kbps.
In other video encoders increasing bitrate usually not cause increasyng
latency, and usually just increasing video sharpness.
QUESTION3: Why here I cannot see this encoder behaviour?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120406/8a9df241/attachment.html>
