pcapng may has value when pcapng_max_pkts is not updated.

Signed-off-by: Du, Frank <frank.du@intel.com>
(cherry picked from commit a0aa151)

Signed-off-by: Frank Du <frank.du@intel.com>
(cherry picked from commit 6743f16)

Signed-off-by: Ric Li <ming3.li@intel.com>
(cherry picked from commit b32690a)

…isualCloud#123)

* plugin/ffmpeg: add the steps to connect kahawai with openh264 encoder

Signed-off-by: Jing Sun <jing.a.sun@intel.com>
(cherry picked from commit e4750e9)

Signed-off-by: Ric Li <ming3.li@intel.com>
(cherry picked from commit 01a85c1)

Signed-off-by: Ric Li <ming3.li@intel.com>
(cherry picked from commit 3e8d9dd)

Signed-off-by: Ric Li <ming3.li@intel.com>
(cherry picked from commit d01a600)

)

Signed-off-by: Ric Li <ming3.li@intel.com>
(cherry picked from commit 8bdf8a0)

Signed-off-by: Frank Du <frank.du@intel.com>

Always get below log if app are running from multi thread with vf.
  _atomic_set_cmd(): There is incomplete cmd 112
  iavf_fdir_add(): fail to execute command OP_ADD_FDIR_FILTER
  iavf_flow_create(): Failed to create flow

Signed-off-by: Frank Du <frank.du@intel.com>
(cherry picked from commit 26c103a)

1. Optimize LaunchTime Tx feature based on section 3.3.2.9.3.4 of doc#682924 rev-1.4.2 requirement.

2. Configurate Qbv scheduler to isolate the video traffic and others traffic. The cycle time of
the scheduler is the frame cycle time of 50fps. According SMPTE 2110-21 standard, the video packets
transmission will end at the 784us from the end of cycle. The queue 0 is for video packets transmission.
The other queues is for others traffic. So, the queue 0 is opened during the whole cycle, and the
other queues is opened at the 784us from the end of cycle.

3. Optimize time sync precision by adding clock freqency adjustment.

4. Fix remote ptp4l NOT receiving DELAY_REQ message while send PTP message over UDP.

To enable TSN pacing, "--pacing_way tsn" command line
argurment is required.

Fix ptp not working on igc when master starts ptp4l with argument "-4" to
broadcast ptp message over UDP.

Because the first few reading tx timestamp attempts always failed,
we have set total 50 attempts to tolerate the fails. So, it is
unnecessary to print error messages of the first few attempts.
Error message is required only when the number of attempts is
larger than 50

Synchronize phc to system clock.

The phc2sys isn't enabled by default. To enable phc2sys, add command
line arguement "--phc2sys".

Be considered as synchronized while the max delta is continuously below
300ns.