Audio only channels - Stream map '0:V:0' matches no streams. To ignore this, add a trailing '?' to the map.

[aknetman]

Plexmediaserver 1.5.5.3634
HTS Tvheadend 4.0.9
Normal TV channels play fine, but when I try to play channels that contain only audio streams, I get this error in the Plex Media Server.log

`May 24, 2017 12:02:51.295 [0x80ac72c00] VERBOSE - [IDLE] * transcoder - i5q2jsbn4fueg66rkh2uh24b - 1 active item(s)

May 24, 2017 12:02:51.295 [0x80ac72c00] DEBUG - Beginning read from two-way stream.

May 24, 2017 12:02:52.010 [0x809572000] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.

May 24, 2017 12:02:52.010 [0x809572000] DEBUG - Auth: Came in with the master token, authorization succeeded.

May 24, 2017 12:02:52.010 [0x80be45800] DEBUG - Request: [127.0.0.1:57044 (Loopback)] PUT /video/:/transcode/session/i5q2jsbn4fueg66rkh2uh24b/progress/streamDetail?index=0&id=1255&codec=ac3&type=audio&channels=2&layout=3&sampleRate=48000 (6 live) Signed-in Token (aknetman)

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * User-Agent => Lavf/57.57.100

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * Accept => /

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * Range => bytes=0-

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * Connection => close

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * Host => 127.0.0.1:32400

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * Icy-MetaData => 1

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * X-Plex-Token => xxxxxxxxxxxxxxxxxxxx

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * channels => 2

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * codec => ac3

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * id => 1255

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * index => 0

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * layout => 3

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * sampleRate => 48000

May 24, 2017 12:02:52.010 [0x80be45800] VERBOSE - * type => audio

May 24, 2017 12:02:52.011 [0x809572000] DEBUG - Completed: [127.0.0.1:57044] 206 PUT /video/:/transcode/session/i5q2jsbn4fueg66rkh2uh24b/progress/streamDetail?index=0&id=1255&codec=ac3&type=audio&channels=2&layout=3&sampleRate=48000 (6 live) 0ms 227 bytes

May 24, 2017 12:02:52.011 [0x80ac72c00] ? - [Transcoder] Stream map '0:V:0' matches no streams.
To ignore this, add a trailing '?' to the map.

May 24, 2017 12:02:52.012 [0x80a39cc00] VERBOSE - JobManager: child process with PID 14654 exited

May 24, 2017 12:02:52.012 [0x80a39cc00] ERROR - JobManager: child process returned: 1 (Operation not permitted)
`

switching profiles from 'pass' to 'matroska' in TVHeadend had the same result.