[mythtv-users] next step the player, any suggestions?

[John Pilkington]

On 25/10/2022 12:58, Hika van den Hoven wrote:
> Hoi Stephen,
> 
> Tuesday, October 25, 2022, 1:29:59 PM, you wrote:
> 
>> On Tue, 25 Oct 2022 12:58:39 +0200, you wrote:
> 
>>> Hoi Mike,
>>>
>>> Tuesday, October 25, 2022, 11:21:09 AM, you wrote:
>>>
>>>> On 25/10/2022 09:55, Stephen Worthington wrote:
>>>>> On Tue, 25 Oct 2022 03:15:42 +0200, you wrote:
>>>>>
>>>>>> Hoi All,
>>>>>>
>>>>>> I now have hdhomerun_config working which outputs a ts stream with
>>>>>> only audio. But I can not use mplayer as that again won't install
>>>>>> without the graphical toolchain.
>>>>>> As far as I have found the alsa tools won't work either, I have tried
>>>>>> mpg321 and madplay, but either I haven't jet found the right options
>>>>>> or they cannot handle ts. Any suggestions?
>>>>>
>>>>> Last time I tried VLC with our NZ DVB-T radio stations it worked. They
>>>>> are .ts files with AAC audio in an MPEG2 transport stream container.
>>>>> I have not tried the RPi version of VLC though.  But VLC will likely
>>>>> need a lot of graphics stuff to install it.  Once installed, this
>>>>> might do what you want:
>>>>>
>>>>> cvlc --no-video /path/to/.ts
>>>>>
>>>> I would add that a .ts stream is not an audio stream and therefore has to be decoded first.
>>>
>>>> Perhaps a simpler option would be to use ffmppeg to select out the audio which, by rights, should
>>>> then be readable by the ALSA tools?
>>>
>>> Nice thought Mike! Do you perchance know the commands to use ffmpeg
>>> like that? I will find them but it will save some time.
>>>
>>> I even came onto the mentioning of a ffmgeg-python module and
>>> audio streams I have handled in python before in the analog radio
>>> times. I already have build a python shell around  hdhomerun_config
>>> for scanning and tuning. I'll share it when it is working.
> 
>> FFmpeg can be a pain if you want it to select out a stream for you.
>> There are various things that you would think would work, but actually
>> do not.  I tried using it to extract the MHEG5 EPG stream from our
>> local DVB-T service, and it just could not do it.  It could create a
>> transport stream with just that stream in it, but it could not provide
>> just a copy of that single stream without the transport stream
>> container.  A tool that will work for extracting a stream from a .ts
>> file is TSDuck:
> 
>> https://tsduck.io
> 
>> Unfortunately, TSDuck is not normally available as packages and you
>> have to build it from source.
>> _______________________________________________
> 
> 
> How about libav? On Gentoo it's the alternative to ffmpeg.

I guess you want a streaming solution, not file-to-file, but maybe this 
line  from mythdvbradio.pl (wiki,2006) or my 'alternative version' of it 
might suggest something:

{{{
#
# Now run ffmpeg to get mp3 out of the dvb radio recording
#
# $command = "ionice -c3 mythffmpeg -i $filename -ab $bitrate -ac 2 
-acodec mp3 -f mp3 '$newfilename' 2>&1";

# That mp2 to mp3 conversion runs at around 25x real speed with one cpu 
at 100%
# Just relabelling mp2 as mp3 is much faster and seems to work, although 
it's probably not pukka
# can be done by mplayer or by mapping in ffmpeg. "  -map 0:1 -c:a  copy 
" Bash extract below

$command = "ionice -c3 mplayer -nogui -vo null -dumpaudio -dumpfile 
'$newfilename' -nojoystick -nolirc '$filename' 2>&1 ";

}}}

HTH, John P

> 
> 
> Tot mails,
>    Hika                            mailto:hikavdh at gmail.com
> 
> "Zonder hoop kun je niet leven
> Zonder leven is er geen hoop
> Het eeuwige dilemma
> Zeker als je hoop moet vernietigen om te kunnen overleven!"
> 
> De lerende Mens
> 
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