Identifiying video format correctly in database (v5.1.9)

[anamorphosa]

Dear All,

I am running TM 5.1.9 on a Western Digital MyBook Live (original firmware has this older version).

I have a variety of MPG files on the device. One particular client - a Sony Bravia TV - is very fussy about parsing the list of files that TM sends it, and refuses even to list anything when it doesn't recognise the DLNA_PN field exactly. Other clients don't have this problem.

Some of the MPGs are seen by the TV, some not. The MPGs are (as far as I can tell) indistinguishable when inspected with mediainfo, ffmpeg/ffprobe etc.

Note that this isn't an issue of whether streaming is successful : the TV can succesfully stream all files it can list.

I inspected the twonky database (twonky,db) within a text editor to see if I could determine whether there was any consistent difference, and there is: the "successful" files all have this field : 0C00BMPEG_PS_PAL : whereas for the unsuccessful mpegs it is missing.

So, a couple of questions:

a) What metadata/file information is twonky parsing in order to populate the database with this field? Does anybody know why it might be missing for some files?

b) Alternatively, can I use the TR field in the clients.db file to force a particular DLNA_PN response for this sort of file, without actually transcoding anything?

[One more point of information : TM v4.4.18, with the same files (on a different device) does not have the same problems. The database correctly includes the "5200BMPEG_PS_PAL" field for the problematic files]

Thanks in advance for any information!

Best regards,

David