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ATSC-T network Pipe to ffmpeg

Added by Broc Miller about 5 years ago

I am trying to pipe the output of azap to ffmpeg to work with TVH.

In the past I have used HD Homerun and ffmpeg to transcode streams directly from the HD Homerun url. It looked something like this. With 10.7.7.100 being the ip of the HD Homerun box. Yes I know I can use the built in transcoding.

#EXTINF:-1,[QVCeHD]
pipe:///usr/bin/ffmpeg -loglevel fatal -i http://10.7.7.100:5004/auto/v505 -vcodec libx264 -preset superfast -crf 28 -maxrate 2600k -bufsize 3500k -vf yadif=0,scale=-2:720 -acodec aac -b:a 128K -f mpegts pipe:1

I have an Hauppauge HVR-2255 set up and running and TVH can see it. I would like to use the same as above but use azap as the input rather than http://10.7.7.100:5004/auto/v505. Is this possible?


Replies (2)

RE: ATSC-T network Pipe to ffmpeg - Added by Broc Miller about 5 years ago

Upon further reading, it doesn't appear azap outputs any video, it just tunes the ATSC channel.

So I can get this to work on command line but not in the url of tvheadend iptv network.

/bin/cat /dev/dvb/adapter0/dvr0 | /snap/bin/ffmpeg -loglevel fatal -i pipe:0 -vcodec libx264 -preset superfast -crf 28 -maxrate 2600k -bufsize 3500k -vf yadif=0,scale=-2:720 -acodec aac -b:a 128K -f mpegts pipe:1

in command line I change on the end "pipe:1" to "output.mp4" to get a file and it makes a file just fine.

If I make the command for TVheadend I get error:

2019-10-23 22:26:26.814 spawn: Executing "/bin/cat"
2019-10-23 22:26:26.815 subscription: 0036: "HTTP" subscribing to mux "XXXX", weight: 10, adapter: "IPTV", network: "test", service: "Raw PID Subscription", hostname="192.168.99.84", client="VLC/3.0.6 LibVLC/3.0.6"
2019-10-23 22:26:26.818 spawn: /bin/cat: invalid option -- 'l'
2019-10-23 22:26:26.818 spawn: Try '/bin/cat --help' for more information.
2019-10-23 22:26:26.818 iptv: stdin pipe unexpectedly closed: No data

Using this command in TVheadend

pipe:///bin/cat /dev/dvb/adapter0/dvr0 | /snap/bin/ffmpeg -loglevel fatal -i pipe:0 -vcodec libx264 -preset superfast -crf 28 -maxrate 2600k -bufsize 3500k -vf yadif=0,scale=-2:720 -acodec aac -b:a 128K -f mpegts pipe:1

I'm suspecting I haven't formatted the command correctly for TVH.

Any help would be appreciated.

RE: ATSC-T network Pipe to ffmpeg - Added by Joe User about 5 years ago

I am not exactly sure why you are going this route, but maybe you would be better off setting up MuMuDVB as your source:
http://mumudvb.net/documentation/asciidoc/mumudvb-2.0.0/TRANSCODE_EXTERNAL.html

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