Startup delay playing radio channel from DVB-C

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Hello

I just recently acquired two pctv 292e triplestick USB DVB-C dongles for testing
audio/video streaming on a Raspberry Pi 3.

For a simple test I wanted to play back a radio station with mpg123 like:

dvbv5-zap -c dvb_channel.conf "Sky Radio NL" -o - | ffmpeg -i - -c:a copy -f mp2 - | mpg123 -a hw:1,0 -


But until audio is hearable it takes around 3 - 4 minutes...
The same happens when I record the mp2 audio stream with ffmpeg in the pipe...


I hardly assume ffmpeg causes this delay as it maybe wants to find out
the duration of the stream as a similar delay is noticable when using mplayer instead of ffmpeg.


Is there a better/faster way that audio is played immediately?



thanks in advance
richard




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