diff options
| author | Wim Taymans <wim.taymans@collabora.co.uk> | 2009-06-11 22:30:06 +0200 |
|---|---|---|
| committer | Wim Taymans <wim@metal.(none)> | 2009-06-11 22:30:06 +0200 |
| commit | 6f3c1728f3a3919fc852589a33db8ec2bba6c341 (patch) | |
| tree | f8b93f18aa2cad416c9ee57762d914f2e498fd95 /gst/rtp | |
| parent | 0bd984c52f1a172545930f94306b4e7a82cacb2e (diff) | |
rtp: update README, fix some typos, mention gstrtpbin
Diffstat (limited to 'gst/rtp')
| -rw-r--r-- | gst/rtp/README | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/gst/rtp/README b/gst/rtp/README index 70143b9e..823fba06 100644 --- a/gst/rtp/README +++ b/gst/rtp/README @@ -165,7 +165,7 @@ between the RTP and GST timestamps. This information is used by a session manager to create SR reports. The NTP time in the report will contain the running time converted to NTP time and the corresponding RTP timestamp. -Not that at the sender side, the RTP and GStreamer timestamp both increment at +Note that at the sender side, the RTP and GStreamer timestamp both increment at the same rate, the sender rate. This rate depends on the global pipeline clock of the sender. @@ -225,7 +225,7 @@ and will apply the drift correction to the GStreamer timestamp before pushing the buffer downstream. The result is that the depayloader receives a smoothed GStreamer timestamp on the RTP packet, which is copied to the depayloaded data. -The following pipeline illustrates the sender with a jitterbuffer. +The following pipeline illustrates a receiver with a jitterbuffer. gst-launch udpsrc caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H263-1998" ! @@ -326,6 +326,17 @@ Some gst-launch lines: The caps on the udpsinks can be retrieved when the server pipeline prerolled to PAUSED. + The above pipeline sets sync=false on the audio and video sink which means that + no synchronisation will be performed in the sinks, they play the data when it + arrives. If you want to enable synchronisation in the sinks it is highly + recommended to use a gstrtpjitterbuffer after the udpsrc elements. + + Even when sync is enabled, the two different streams will not play synchronised + against eachother because the receiver does not have enough information to + perform this task. For this you need to add the gstrtpbin element in both the + sender and receiver pipeline and use additional sources and sinks to transmit + RTCP packets used for inter-stream synchronisation. + The caps on the receiver side can be set on the UDP source elements when the pipeline went to PAUSED. In that state no data is received from the UDP sources as they are live sources and only produce data in PLAYING. |