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Old 01-02-2010, 08:03 PM
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meetooman meetooman is offline
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Quote:
Originally Posted by electron View Post
I see this error all the time when I use Handbreak's normal preset instead of the iPod Touch preset... but I don't know what it really means..
H264 specification defines some quality profiles and levels, each one sets some encoding parameters and features (B-frames, CABAC, trellis, etc). There is a great page from Robert Swain explaining it.

With encoding software like ffmpeg you can then use preset parameters corresponding to your player supported levels. Here is the ffmpeg presets list on my present installation:
Quote:
baseline
default
fastfirstpass
hq
ipod320
ipod640
lossless_fast
lossless_max
lossless_medium
lossless_slower
lossless_slow
lossless_ultrafast
main
max
normal
slowfirstpass
For example, my Sony device can only play H264 baseline video files. So I use the ffmpeg command with 2 switchs: ffmpeg *** -vcodec libx264 -vpre default -vpre baseline ***.
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