Hi,
I had the same issue, ffmpeg will not provide CBR for MP4 , you might
end-up with variable bit rates on the TS stream. I had some good success
with a target bit rate on ffmpeg around 150% of the bit rate set on
GNURadio. But this will only work with real time inputs like webcam,
when trying to run with pre-recorded videos or files I had a huge
headache to get a "real" speed on the Rx side.
My set-up was similar to yours ffmpeg+gnuradio+hackrf one and
rtlsdr+sdrangel on rx
Using a webcam as input it worked fine for me with around 125 to 150%
bit rate on ffmpeg over the one at the gnuradio/sdrangel value.
Let me know if you want to know more about my settings.
Regards,
Raydel, CM2ESP
On 07/02/2019 23:15, Alban Meffre wrote:
Hi All
did some transmission test in DVB-S tonight
TX : ffmpeg + gnuradio + pluto SDR
RX : RTLSDR + sdrangel
it works but there are some gaps in the received signal because the TS
stream bitrate is slightly less to the maximum usable bitrate
is it possible to add some bit stuffing at DVB-S modulator side to
make to output power constant ?
Bob
--
Alban MEFFRE F4GSW
_______________________________________________
Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________
Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
