ok, danke für den hinweis. ich hab jetzt eine aufnahme auf dem vdr-server auf diesem sender gemacht und diese zu mir kopiert und mit vlc gestartet.
das problem dürfte NICHT beim streamdev-plugin sondern doch beim iptv-plugin liegen, denn auch hier ist das selbe bild- und ton-problem 
hier der output des vlc während der wiedergabe:
VLC media player 2.2.6 Umbrella (revision 2.2.6-0-gdbe888f)
[0000000100338028] core interface error: no suitable interface module
[0000000100413688] core libvlc error: interface "(null),none" initialization failed
[0000000100413688] core libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[0000000100418ec8] ts demux: MPEG-4 descriptor not found for pid 0x101 type 0xf
[0000000100418ec8] ts demux error: Failed to decode a ISO 639 descriptor
[00000001098028b8] packetizer_mpeg4audio packetizer: AAC channels: 2 samplerate: 48000
shader program 1: WARNING: Output of vertex shader 'TexCoord1' not read by fragment shader
WARNING: Output of vertex shader 'TexCoord2' not read by fragment shader
[h264 @ 0x100840000] top block unavailable for requested intra4x4 mode -1 at 79 0
[h264 @ 0x100840000] error while decoding MB 79 0, bytestream 38992
[00000001098028b8] packetizer_mpeg4audio packetizer error: Multiple blocks per frame in ADTS not supported
[h264 @ 0x100840000] top block unavailable for requested intra4x4 mode -1 at 15 0
[h264 @ 0x100840000] error while decoding MB 15 0, bytestream 6093
[h264 @ 0x10102ee00] top block unavailable for requested intra4x4 mode -1 at 15 0
[h264 @ 0x10102ee00] error while decoding MB 15 0, bytestream 45912
[h264 @ 0x10102ee00] top block unavailable for requested intra mode at 74 0
[h264 @ 0x10102ee00] error while decoding MB 74 0, bytestream 45475
[h264 @ 0x10101b800] top block unavailable for requested intra4x4 mode -1 at 70 0
[h264 @ 0x10101b800] error while decoding MB 70 0, bytestream 8955
[h264 @ 0x10102ee00] cabac decode of qscale diff failed at 36 16
[h264 @ 0x10102ee00] error while decoding MB 36 16, bytestream 36522
[h264 @ 0x10102ee00] left block unavailable for requested intra mode at 0 32
[h264 @ 0x10102ee00] error while decoding MB 0 32, bytestream 19337
[h264 @ 0x10102ee00] top block unavailable for requested intra4x4 mode -1 at 26 0
[h264 @ 0x10102ee00] error while decoding MB 26 0, bytestream 47163
[h264 @ 0x10102ee00] left block unavailable for requested intra mode at 0 2
[h264 @ 0x10102ee00] error while decoding MB 0 2, bytestream 47548
[h264 @ 0x10100f400] reference count overflow
[h264 @ 0x10100f400] decode_slice_header error
[h264 @ 0x100840000] top block unavailable for requested intra4x4 mode -1 at 27 0
[h264 @ 0x100840000] error while decoding MB 27 0, bytestream 3582
[h264 @ 0x10102ee00] top block unavailable for requested intra4x4 mode -1 at 55 0
[h264 @ 0x10102ee00] error while decoding MB 55 0, bytestream 42199
[h264 @ 0x10101b800] top block unavailable for requested intra mode at 23 0
[h264 @ 0x10101b800] error while decoding MB 23 0, bytestream 89200
[h264 @ 0x10100f400] top block unavailable for requested intra mode at 12 0
[h264 @ 0x10100f400] error while decoding MB 12 0, bytestream 38528
[h264 @ 0x100840000] top block unavailable for requested intra4x4 mode -1 at 67 0
[h264 @ 0x100840000] error while decoding MB 67 0, bytestream 7232
[00000001098028b8] packetizer_mpeg4audio packetizer error: Multiple blocks per frame in ADTS not supported
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