Code:
eac3to 00001.m2ts 2: video.mkv 3: audio.dts -core
M2TS, 1 video track, 5 audio tracks, 13 subtitle tracks, 1:59:58
1: Chapters, 32 chapters
2: h264/AVC, 1080p24 /1.001 (16:9)
3: DTS Master Audio, English, 5.1 channels, 24 bits, 48khz, -9ms
4: DTS, Spanish, 5.1 channels, 24 bits, 768kbit/s, 48khz, -9ms
5: AC3, English, 2.0 channels, 96kbit/s, 48khz, dialnorm: -27dB, -24ms
6: AC3, English, 2.0 channels, 96kbit/s, 48khz, dialnorm: -27dB, -23ms
7: AC3, English, 2.0 channels, 96kbit/s, 48khz, dialnorm: -27dB, -23ms
8: Subtitle (PGS), English
9: Subtitle (PGS), Spanish
10: Subtitle (PGS), Spanish
[v02] Extracting video track number 2...
[a03] Extracting audio track number 3...
[a03] Extracting DTS core...
[a03] Applying DTS delay...
[v02] Muxing video to Matroska...
[a03] Creating file "audio.dts"...
To mux audio in the mkv file that eac3to makes, you need to run mkvtoolnix as a second step. eac3to can't do it automatically.