Blu-ray conversion loses TrueHD audio track

[pderocco]

I'm trying to compress a Blu-ray rip, using VLC 3.0.6 on Win7. The .m2ts file plays fine in VLC, but it's data rate is too high for my old laptop, which I sometimes want to use for viewing. I set it to convert to H.264 at about 6Mb/s, keeping the original frame rate and FHD resolution. For audio, I tell it to keep the original audio track.

When I play the .m2ts rip, I can see in Codec Information that it has six audio tracks. The English is TrueHD and the other five foreign language tracks are A52. When I play the converted file, the video looks fine, but only the foreign audio tracks are present.

Is there anything I can do to fix this? And if so, is there anything I can do, perhaps from the command line, to leave out the foreign audio tracks entirely?