Discussion:
Do FPS affect bitstream?
Andreas Engel
14 years ago
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Hi,

does the frame rate in th_info have any actual effect on the resulting
bitstream? So for example do I get different results when encoding the
same video 2000kbit/s at 30fps or 1000kbit/s at 15fps?

Thanks in advance
Andreas
Ralph Giles
14 years ago
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Post by Andreas Engel
does the frame rate in th_info have any actual effect on the resulting
bitstream? So for example do I get different results when encoding the
same video 2000kbit/s at 30fps or 1000kbit/s at 15fps?
Currently libtheoraenc doesn't take the framerate into account when
making encoding decisions, so I'd expect that to be true up to
rounding error. Note that if you're comparing the streams, the header
packet will be difference, since it signals the playback rate to the
decoder.

-r
x***@xiph.org
14 years ago
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...
...with the caveat that 1000kbps/15fps is harder to encode than
2000kbps/30fps because the motion isn't as smooth, so I would expect
the resulting frames to be noticably lower quality as well as less
smooth.

Monty

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