I have a 1080P/24 H.264 clip of 14315 frames [Big Buck Bunny], when transcoding from H.264 > MPEG2 I get approximatley the same speed from software or hardware transcoding.
The output from sample_multi_transcode does indicate my two runs, one with '-hw', one without, are using different versions of the SDK, and different libs for coding. [libmfxhw64.dll vs libmfxsw64.dll]. So I don't believe I am running two software sessions. [See attached log]
I am on Win7 x64, IMSDK 2013, HP Z210 PC, 2nd Gen Sandy Bridge, Core i3-2100 CPU @ 3.10GHz, HD Graphics 188.8.131.5262
Thoughts and info on MPEG2 encoding/decoding and what generations work best is appreciated [2nd gen?, 3rd gen?, 4th gen?]
Attached are output from sys_analyzer.exe and two runs of sample_multi_transcode.exe [with and without -hw].