Re: [Discuss-gnuradio] Video Streaming

[Marcus Müller]

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Hi Syed,

test 2 should be completely transparent and thus you shouldn't lose
quality. The input bitrate of the video is below 1Mb/s, so for a pure
loopback test I can't imagine this going wrong. Are you sure that the
sending VLC does *not* decode the video into something with a much
higher bitrate. Also make sure you don't use throttle in between.

Greetings,
Marcus



On 20.02.2014 11:32, Syed Aqeel Raza wrote:
> Hi
> 
> 
> I am trying to stream a video over a wireless network using UDP
> protocol. For that, I started tests in the following sequence:
> 
> 
> Test 1: VLC ---- VLC
> 
> 
> Test 2: VLC ---- Gnuradio (using udp source and udp sink blocks 
> only) ---- VLC
> 
> 
> Test 3: VLC ---- Gnuradio (with a complete communication model
> (e.g. mod/demod)) ---- VLC
> 
> 
> Test 4: VLC ---- Gnuradio ---- USRPs (multiple) ---- VLC
> 
> 
> Test 1 completed successfully and the streamed video quality is
> perfect at the receiver end. Whereas, in test 2, test 3 and test 4
> I've successfully got the streamed video at the receiver end but
> the quality is not good (it's even more degraded when shift to the 
> higher test levels). During the testing a warning message appeared
> on gnuradio console i.e. Too much data; packet loss.
> 
> 
> I tried to resolve this issue by adjusting the factors like
> payload size and sampling rate but nothing works. The flowcharts
> and the video are attached here for reference.
> 
> 
> Furthermore, can anyone give me a hint that how can I check the
> parameters like throughput, packet delay and SNR.
> 
> 
> Kindly assist me and point out the mistake I've made, waiting for
> earliest reply. Thanks.
> 
> 
> Regards, Syed Aqeel Raza
> 
> 
> 
> _______________________________________________ Discuss-gnuradio
> mailing list address@hidden 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
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