Use Hardware Acceleration for Thumbnail (Chapter and Roku) Generation

[astephon88 2]

If hardware acceleration is available and enabled, using hardware decoders during thumbnail generation would be extremely beneficial to speeding up the process.

[Luke 42078]

I'll let @@softworkz respond to this. Thanks.

[softworkz 5066]

Please see here: https://emby.media/community/index.php?/topic/72311-why-is-there-no-hw-acceleration-for-image-extraction/

[astephon88 2]

Please see here: https://emby.media/community/index.php?/topic/72311-why-is-there-no-hw-acceleration-for-image-extraction/

Yea, sorry. I wasn't thinking about the single-threaded JPEG encoding.