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<DIV>Hi!</DIV>
<DIV> </DIV>
<DIV>I hope you are not bothered by the virus. I am br Pio. I come from France
and discovered gstreamer a few months ago. I use it to stream multiple video
sources on YoutubeLive. May I say you guys do a great job!</DIV>
<DIV> </DIV>
<DIV>I have few problems I really can’t get through. </DIV>
<DIV> </DIV>
<DIV>I have two live video sources:</DIV>
<DIV> </DIV>
<DIV>-an axis ip camera, which gives me a rtsp flow</DIV>
<DIV>-a videocamera flow going through a hdmi to usb adaptater, and streamed by
vlc, which gives me a rtsp flow.</DIV>
<DIV> </DIV>
<DIV>I use voctomix to mix the 2 video sources with the audio input of a sound
card. </DIV>
<DIV> </DIV>
<DIV>Here are the pipelines for the video sources:</DIV>
<DIV> </DIV>
<DIV>gst-launch-1.0 rtspsrc location=$URLCAM latency=2000 ! decodebin
name=decoder max-size-time=100000000 use-buffering=true low-percent=1 \</DIV>
<DIV> decoder. ! queue
min-threshold-time=$DELAY ! videoscale ! videorate ! videoconvert !
video/x-raw,format=UYVY,width=$WIDTH,height=$HEIGHT,framerate=$FRAMERATE/1,pixel-aspect-ratio=1/1
! queue ! matroskamux name=mux !\</DIV>
<DIV> tcpclientsink host=localhost
port=$PORT \</DIV>
<DIV> audiotestsrc freq=550 !\</DIV>
<DIV>
audio/x-raw,format=S16LE,channels=2,layout=interleaved,rate=48000 ! mux.</DIV>
<DIV> </DIV>
<DIV>And for the audio source:</DIV>
<DIV> </DIV>
<DIV>ffmpeg -y -nostdin \</DIV>
<DIV> -itsoffset $retard \</DIV>
<DIV> -loop 1 -i
"/home/mixer/voctomix/lanceurs/sound.jpg" \</DIV>
<DIV> -f pulse -i default \</DIV>
<DIV> -ac 2 \</DIV>
<DIV> -vcodec rawvideo -r "$FRAMERATE" \</DIV>
<DIV> -vf "scale=1280:-1,format=uyvy422" \</DIV>
<DIV> -acodec pcm_s16le -ar "$AUDIORATE" -af $channel \</DIV>
<DIV> -map 1:a:0 -map 0:v:0 \</DIV>
<DIV> -f matroska \</DIV>
<DIV> tcp://localhost:10003</DIV>
<DIV> </DIV>
<DIV>My first problem is:</DIV>
<DIV> </DIV>
<DIV>- The pipeline of the videocamera randomly renders a partially grey image.
I have the same problem with some other ip cameras. The problem does not seem to
come from the network gear, since the ip camera and the videocamera are using
the same “way”.</DIV>
<DIV>The problem also seem to decrease with the bitrate: the lower the BR is,
the lower the grey image occurs. </DIV>
<DIV>It also decreases when the preset used to encode the rtsp stream is slower:
preset = medium, greater chance to get grey than with preset =slow. But when I
use preset=slow, the pipeline output randomly goes faster of slower: the video
is slow then suddenly accelerate, and then gets slow again etc.</DIV>
<DIV> </DIV>
<DIV>Here’s what it looks like.</DIV>
<DIV> </DIV>
<DIV><IMG title=grey
style="BORDER-TOP: 0px; BORDER-RIGHT: 0px; BACKGROUND-IMAGE: none; BORDER-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; BORDER-LEFT: 0px; DISPLAY: inline; PADDING-RIGHT: 0px"
border=0 alt=grey src="cid:681A5C76FA2C47F1B413182182E383B0@StMaxROC" width=644
height=358></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>My second problem is :</DIV>
<DIV> </DIV>
<DIV>The audio input is randomly delayed. The offset between video and audio is
random. One day it is perfectly synchronized, the other, there may be up to
500-1000ms offset!</DIV>
<DIV> </DIV>
<DIV>In advance, thanks for taking time to answer me. I hope to hear from you
soon.</DIV>
<DIV> </DIV>
<DIV>Best regards.</DIV>
<DIV> </DIV>
<DIV>br Pio</DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></BODY></HTML>