how much bytes is the overhead?
does the recieving ZMQ block has to get the bytes in chunks
of 188 bytes?
i recieve the udp ts stream in varies packet sizes... and
send the straight to the ZMQ framework.
does a 188 byte packitizer exist in gnuradio, so he can do
this job?
or isn't this the reason for the sunc errors?
i somethimes get a few frames visible... so it has to be
related to timings...
Van: "Ron Economos"
<address@hidden>
Aan: "discuss-gnuradio"
<address@hidden>
Verzonden: Woensdag 26 april 2017 21:21:39
Onderwerp: Re: [Discuss-gnuradio] WARN: transport
stream sync error
You may want to put a file
sink block after your ZMQ block to make sure you're chain is
working as expected.
Usually 188 byte alignment is just done by picking a UDP
packet size that's a multiple of 188 bytes (plus overhead).
For example, VLC in UDP mode uses 1358 byte packets and puts 7
TS packets in each UDP packet. Like so:
Ron
Are you saying that there are no sync bytes in my
stream?
or should i wait until i get byte 0x47 in my udp
packet, wait till i get 188 bytes, and send them as an
array of bytes in the zeroMQ?
Van: "Ron Economos"
<address@hidden>
Aan: "discuss-gnuradio"
<address@hidden>
Verzonden: Woensdag 26 april 2017 20:16:10
Onderwerp: Re: [Discuss-gnuradio] WARN:
transport stream sync error
The BBheader block expects the Transport Stream to
start with a sync byte (0x47) and that a sync byte
appears every 188 bytes.
There's no sync byte synchronization in the BBheader
block, so if the stream doesn't start with a sync
byte, you'll get continuous errors.
Ron
Hi,
My setup:
Linux gnuradio with dvb-s2 tx sample code.
adjusted to read from ZeroMQ pull source
5M symbol. in 8psk dvb-s2 3/4 code rate
Windows side: 2 programs:
1) program to make udpts stream from webcam(5M)
-> send udp stream to 127.0.0.1:1234
2) program to listen to udp port 1234 get udp
packets and send them to ZeroMQ push socket
gnuradio is complaining about transport stream
sync error.
What can be the reason for this?
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