Hi Simon, I've tried your script today with my test TV but see no signal whatsoever on the TV although the hackrf is definitely transmitting. I've also tried with a pre-recoded mpeg2 file from avconv but no luck.
Any suggestions? Craig On Tue, Jun 30, 2015 at 10:57 PM, Simon Kennedy <[email protected]> wrote: > I feel slightly embarrassed as I subscribed to this list using an email > address that is redirected to my main email, so consequently replies sent > from my main email address were not coming from the correct address. Hence, > none of the replies I posted have been seen on the list. Oops! > > Here is my reply about this thread: > > Hi Craig, > > Check out Clayton's web page (who created the sdr-examples you refer to) > here <http://www.irrational.net/2014/03/02/digital-atv/> > > I amended his BladeRF script and I have put my HackRF version here > <https://www.dropbox.com/s/bdnzoa0kn01dfav/dvbt-hackrf_tx_sk.py?dl=0> for > download > My version transmits DVB-T on the lowest Freeview channel in the UK at > 474MHz (obviously only while using a dummy load). I successfully received > the transmission of my webcam image this way using an RTL-SDR dongle. > > The command I used was very heavily influenced (ok, basically copied) from > Clayton's examples: > avconv -f alsa -i hw:0,0 -f video4linux2 -s 640x480 -i /dev/video0 -vf > drawtext=fontfile=/usr/share/fonts/truetype/freefont/FreeMonoBold.ttf:text="TEST > ":x=440:y=420:fontsize=48:[email protected]:box=1:[email protected] > -vcodec mpeg2video -r 60 -b 2000000 -acodec mp2 -ar 48000 -ab 48000 -ac 2 > -mpegts_transport_stream_id 1025 -mpegts_service_id 1 -mpegts_pmt_start_pid > 4096 -mpegts_start_pid 400 -f mpegts -y in.fifo > > I used a standard web cam to capture the image, sent the output to a fifo > file (in.fifo) and consumed the output through the python program with the > command: > ./dvbt_hackrf_tx_sk.py in.fifo > > The fifo file can be created using the command mkfifo in.fifo > > Run the avconv command and the python program in the same directory as you > created the fifo file in. > > I have also transmitted DVB-S which I have documented on my blog here > <http://photohamrad.blogspot.co.uk/2015/06/transmitting-video-with-hackrf-blue.html> > > Simon. > > > On 30 June 2015 at 17:35, Simon Kennedy <[email protected]> wrote: > >> Can you tell us the command you used to get this error please. >> I remember that I got a smilar error but cannot look up how I solved it >> until I get home in a couple of hours. >> The key point is that the program is trying to open a UDP port to receive >> the data and error relates to the asignment of the argument you supply to >> the program to the variable 'port' in the program. >> >> Simon. >> >> On 30 June 2015 at 16:49, Craig Barber <[email protected]> wrote: >> >>> Here's the error I get: >>> >>> Traceback (most recent call last): >>> File "./dvbt-hackrf.py", line 123, in <module> >>> main(sys.argv[1:]) >>> File "./dvbt-hackrf.py", line 31, in main >>> port = int(args[0]) >>> ValueError: invalid literal for int() with base 10: 'testdvbt' >>> >>> >>> >> > > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > >
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