Thanks for the fast response n0p but I cannot find that parameter? On Sun, Jul 5, 2015 at 1:34 PM, n0p [Luis Bernal] <[email protected]> wrote:
> The ts mux bitrate has to match the modulator's > Avconv parameter -muxrate > El 5/7/2015 14:11, "Craig Barber" <[email protected]> escribió: > >> The good news is I got it working, sort of, using channel_mhz = 8 - >> however the picture and audio judders really badly, and basically plays >> back really slow! I don't have a stream of UUUUUUUUUUU appearing in my >> console window, so can't be buffer underruns, any ideas Simon? >> >> On Sun, Jul 5, 2015 at 12:30 PM, Craig Barber <[email protected]> >> wrote: >> >>> 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 >>>> >>>> >>> >> >> _______________________________________________ >> HackRF-dev mailing list >> [email protected] >> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >> >>
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