Old thread but for the record...
I own a Sony Bravia KDL46EX503 and have WAISTED many hours trying to find what formats the DLNA client supports.
First thing to note, there are file formats and there are video codecs BOTH are important. For example you can have an AVI file format containing video data that requires the AVC codec to play it. On a similar basic you can have an MP4 file format containing video data that requires the AVC codec to play it. However even though the Sony DLNA client can play AVC video data it does not recognise either the AVI or MP4 file format! Why? If you no the answer please tell me!
The Sony DLNA client for the KDLxxEX serries TV supports the following file formats:
MPEG-PS (.mpg or .mpeg) and must contain video data for MPEG version 2 codec.
BDAV (.mts or .m2ts) and must contain video data for the AVC codec.
Audio data must be in either MP3 or AC3 codec formats. To be certain that the audio will work you are best advised to use the AC3 format. (you can use either 2ch or 5.1ch )
Please do not waist any time with any other formats unless Sony have specifically told you that they now support them.
I have been successful at streaming both MPEG2 and AVCHD to my Sony via Twonky Media Server all other formats DO NOT work.
Given that a Sony TV that supports DLNA clients are not cheap I do find their attitude to supporting multiple file formats very arrogant. In particular I do not understand why they only support the MP4 and DIVx formats on the USB?
How difficult is it? Well my 10" Polaroid picture frame with wireless connection supports every format (except DIVx) that I have thrown at it so far. It recognises AVI, MP4, MPEG2, MPEG1, WMV all with various codecs including VIDx and AVC!
Come on Sony get with the picture (pun intended)!