[mythtv-users] MPEG-2 to MPEG-4 Transcoding comparisons

[Clif Deanhardt]

Would someone who's using .12 to transcode PVR-250 MPEG-2s into MPEG-4s like
to compare notes on compression rates?  I'm trying to get a handle on
whether I've got mine set up optimally and I'm a bit of a noob at setting
this thing up.

With the exception of a apparition when I first started using it, every one
of my 1hr shows records at 3.7gb and after transcoding it's 2.2gb,
regardless of the type of show or number of colors or quantity of movement.

Likewise, every one of my half hour shows records at 1.8gb and transcodes to
1.1gb.

Is anyone else similarly set up?  What numbers are you getting?

Thanx!

Clif


My settings:

----------------------------
MPEG-2 ENCODERS / DEFAULT
----------------------------
   Width/Height: 480x480

   Codec: MPEG-2 HARDWARE ENCODER
   Stream: MPEG-2 PS
   Aspect: 4:3
   Bitrate: 4500
   Max Bitrate: 6000

   Codec: MPEG-2 HARDWARE ENCODER
   SampleRate: 32000
   Type: Layer II
   Bitrate: 384kbps

----------------------------
TRANSCODERS / MPEG2
----------------------------

   Width/Height: 480x480

   Codec: MPEG-4
   Bitrate: 2200
   Max Quality: 2
   Min Quality: 15
   Max Quality Difference Between Frames: 3
   Scale Bitrate for Frame Size: Selected
   Enable High Quality encoding: Not Selected
   Enable 4MV: Not Selected

   Codec: MP3
   SampleRate: 32000
   Quality 7

----------------------------
GENERAL
----------------------------
It's configured to automatically detect commercials, but not to skip them.
And the resulting, compressed files still have the commercials in them.