Some m2ts, maybe from BD's, don't have language trakcs info.
When there are ffmpeg show that info, for instance:
Quote:
Input #0, mpegts, from 'interla.m2ts':
Stream #0:0[0x1011]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x1100](eng): Audio: dts (DTS-HD MA) ([134][0][0][0] / 0x0086), 48000 Hz, 5.1(side), s32p (24 bit)
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The language info of m2ts in BD's are in the mpls.
In windows, eac3to, or tsMuxeR, when the m2ts are in a BD structure the language info is show correctly, copied out of a BD structure the language is show like 'und'.