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Custom MPEG-TS Input » History » Version 24

Jaroslav Kysela, 2015-10-27 17:40

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h1. Custom MPEG-TS Input
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h2. Requirement
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The TVHeadend 3.9.2100 and up for the pipe:// URL support. Note that TVHeadend expects the input in the raw MPEG-TS format with correct PAT/PMT tables.
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h2. IPTV URLs
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**Note: Always try the command without pipe:// prefix on standard command line, if it works with a stdout redirection to a file!!**
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h3. Streaming from a file
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Use option -re for the input specification to stream the file at native frame rate.
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<pre>
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  -re (input)
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      Read input at native frame rate. Mainly used to simulate a grab
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      device.  or live input stream (e.g. when reading from a file).
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      Should not be used with actual grab devices or live input streams
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      (where it can cause packet loss).  By default ffmpeg attempts to
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      read the input(s) as fast as possible.  This option will slow down
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      the reading of the input(s) to the native frame rate of the
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      input(s). It is useful for real-time output (e.g. live streaming).
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</pre>
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h3. Internet Radios
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**Note: FFmpeg flag '-tune zerolatency' depends on the x264 encoder (libx264), remove the flag if x264 encoder isn't available on your system (e.g. OpenELEC).**
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From ffmpeg v2.6 and on one can set the service type of the mpegts stream as radio.
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<pre>
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pipe:///usr/bin/ffmpeg -loglevel fatal -i INPUTLINK -vn -acodec copy -metadata service_provider=RADIOPROVIDER
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  -metadata service_name=RADIONAME -tune zerolatency -f mpegts -mpegts_service_type digital_radio pipe:1
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</pre>
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With older ffmpeg releases the mpegts service type cannot be set correctly so the audio stream will be listed as a TV channel, you can use a static image that will be shown with the audio stream (the Radio Logo maybe?).
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<pre>
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pipe:///usr/bin/ffmpeg -loglevel fatal -loop 1 -y -i /path/to/image.png -re -i INPUTLINK
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  -vcodec libx264 -acodec copy -mbd rd -copyinkf -flags +ilme+ildct -fflags +genpts
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  -metadata service_provider=RADIOPROVIDER -metadata service_name=RADIONAME -tune zerolatency -f mpegts pipe:1
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</pre>
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h4. For H264 video, the mp4toannexb filter must be used for MP4 video streams
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<pre>
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-bsf:v h264_mp4toannexb,dump_extra 
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</pre>
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h3. Transcoding
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YMMV with different ffmpeg/libav versions. In Red Hat's (Fedora/Centos) build of ffmpeg, aac transcoding is experimental, so you have to enable -strict -2
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<pre>
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pipe:///usr/bin/ffmpeg -loglevel fatal -i INPUTLINK -vcodec libx264 -acodec aac -strict -2 -mbd rd -copyinkf -flags +ilme+ildct -fflags +genpts
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  -metadata service_provider=STRING -metadata service_name=STRING -f mpegts -tune zerolatency pipe:1
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</pre>
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Try to transcode as little as possible, since it will impact your cpu usage. And if you're using tvheadend to re-transcode... well..
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So if your channel already has aac audio, maybe you only need to transcode the video stream.
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<pre>
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pipe:///usr/bin/ffmpeg -loglevel fatal -i INPUTLINK -vcodec libx264 -acodec copy -mbd rd -copyinkf -flags +ilme+ildct -fflags +genpts
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  -metadata service_provider=STRING -metadata service_name=STRING -f mpegts -tune zerolatency pipe:1
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</pre>
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h3. Direct copy (container only change)
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<pre>
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pipe:///usr/bin/ffmpeg -loglevel fatal -i INPUTLINK -vcodec copy -acodec copy -metadata service_provider=STRING
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  -metadata service_name=STRING -f mpegts -tune zerolatency pipe:1
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</pre>
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h3. Cookie-protected HLS Streams
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ffmpeg is not the smartest cookie in the jar handling cookies (pun intended). So while you can insert cookies using the -cookie option, and alternative option is using Squid with request_add_header option
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<pre>
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request_header_add Cookie 'YOUR COOKIE CONTENT' all
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</pre>
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The trailing all refers to the ACL it applies to. Please read the full documentation on how to implement this on the Squid Website (http://www.squid-cache.org/Doc/config/request_header_add/)
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h2. Other solutions (HTTP proxy)
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"A simple ffmpeg HTTP proxy using nodejs":https://github.com/Jalle19/node-ffmpeg-mpegts-proxy