Tvheadend

Hi!

I'm having an error transcoding channels, sometimes I run out of sound, depending on the bitrate settings the cpu is between 60% to 120%, I'm using aac and h264 codec profiles, sometimes when changing the channel the sound returns

2018-09-08 17:43:42.373 [ ERROR] libav: AVCodecContext: error while decoding MB 25 22, bytestream 387
2018-09-08 17:43:42.375 [ ERROR] libav: AVCodecContext: Reference 3 >= 2
2018-09-08 17:43:42.375 [ ERROR] libav: AVCodecContext: error while decoding MB 96 32, bytestream 702
2018-09-08 17:43:42.393 [ ERROR] libav: AVCodecContext: Reference 2 >= 2
2018-09-08 17:43:42.393 [ ERROR] libav: AVCodecContext: error while decoding MB 97 0, bytestream 1222
2018-09-08 17:43:42.414 [ ERROR] libav: AVCodecContext: Reference 2 >= 2
2018-09-08 17:43:42.414 [ ERROR] libav: AVCodecContext: error while decoding MB 3 21, bytestream 350
2018-09-08 17:43:42.496 [ ERROR] libav: AVCodecContext: left block unavailable for requested intra mode
2018-09-08 17:43:42.496 [ ERROR] libav: AVCodecContext: error while decoding MB 0 10, bytestream 1039
2018-09-08 17:43:42.496 [ ERROR] libav: AVCodecContext: top block unavailable for requested intra mode -1
2018-09-08 17:43:42.496 [ ERROR] libav: AVCodecContext: error while decoding MB 46 12, bytestream 3837
2018-09-08 17:43:42.497 [ ERROR] libav: AVCodecContext: deblocking filter parameters -6 7 out of range
2018-09-08 17:43:42.497 [ ERROR] libav: AVCodecContext: decode_slice_header error
2018-09-08 17:43:42.497 [ ERROR] libav: AVCodecContext: top block unavailable for requested intra mode -1
2018-09-08 17:43:42.497 [ ERROR] libav: AVCodecContext: error while decoding MB 104 48, bytestream 2797
2018-09-08 17:43:42.625 [ ERROR] libav: AVCodecContext: Reference 3 >= 2
2018-09-08 17:43:42.625 [ ERROR] libav: AVCodecContext: error while decoding MB 89 36, bytestream 4577

Transcoding is necessary because of limitations in bandwidth, what hardware do I need to improve this?

for the moment I use the streaming profile on the user, how can I transcode some channels if others do not?

tanks !