I would like the “Tracks, Chapter, and Tags” columns—where codecs, types, names, and other details are listed—to also include the track size in MB.
Welcome!
The track size is not something that can be determined for all containers (e.g. it cannot for MPEG TS, MPEG PS, Ogg, only sometimes for Matroska). I’m not interested in adding a column that’ll often be empty, as I’ll have to explain that over and over again. Sorry.
I admit that file formats are a mystery to me, but how is it possible that we can’t count the bytes? I’ve read that MKV files don’t include this information in the header, but if the data is there, it should be possible to read it, regardless of the format.
You are correct that it can be done, however, this cannot be done quickly. For container formats that do not have header fields for this type of information MKVToolNix would read to read the whole file from start to finish in order to determine the track size when you add it to it. In case of multi-GB files or structures such as Blu-rays this usually takes minutes, even on fast drives. The goal is to have adding to MKVToolNix fast.