View source for User:StasFomin/AviSynth/Bugs/No thumbnails for X264 lossless

Problem:

* I have video-AVI, encoded by x264fvw, +lossless mode. [[:File:Small 365K sample of lossless X264.avi]] and Windows Explorer not shows thumbnails.
* I see the bug on Windows 7 x64 (because all neighbours PCs/laptop have W7x64)
* I read the http://www.codecguide.com/faq_thumbnails.htm
** shmedia.dll registered and thumbnail works for all AVIs with other types of codecs (including non-lossless x264) 
** HKEY_CLASSES_ROOT\.xyz\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1} - OK.
** H.264 is enabled on the Codecs page in ffdshow video decoder configuration.
** I installed both the 32-bit and the 64-bit codec pack
** Windows Media Player12 Installed.
** I cleared thumbnail cache.
** [[/Codec Tweak Tool Log file]]
** I generate new such files — if I use "x264vfw lossless" — played OK, no thumbnails. If "x264vfw non lossless" — thumbnails OK.

Please, any ideas!
Is it bug or a feature?
If the bug — who is guilty? (Me and my karma, x264vfw, KLite, Windows, etc).
May be workaround exists?

   Sincerely, Stas Fomin.