Yes. The MPEG (2) transport stream container has one of the highest overhead of all the usual containers. It's really noticeable.
Another possible part of the explanation are filler NALUs. Video streams might contain so-called "filler NALUs" that don't contain any data and are only present to keep the effective bitrate above a certain threshold. As those NALUs are completely superfluous wrt. decoding, they're dropped by MKVToolNix.
__________________
Latest MKVToolNix is v83.0
If I ever ask you to upload something, please use my file server.
|