日志分析
main demux debug: using access_demux module "live555"
main input error: option sub-delay does not exist
main packetizer debug: looking for packetizer module matching "any": 0 candidates
main packetizer debug: no packetizer modules
main decoder debug: looking for video decoder module matching "any": 1 candidates
main decoder debug: no video decoder modules matched
main decoder error: Codec `hevc' (MPEG-H Part2/HEVC (H.265)) is not supported.
main decoder error: Codec not supported
main decoder error: VLC could not decode the format "hevc" (MPEG-H Part2/HEVC (H.265))
main decoder debug: killing decoder fourcc ` '
main input debug: audio is disabled, not selecting ES 0x1
main demux meta debug: looking for meta reader module matching "any": 0 candidates
main demux meta debug: no meta reader modules
main input debug: `rtsp://admin:admin123@172.16.25.14/1' successfully opened通过上述日志分析（Codec `hevc' (MPEG-H Part2/HEVC (H.265)) is not supported），没有找到对应的H265解码器，因此播放失败。因此需要加载对应的解码器
