Comparing compression quality of h.264 encoders

[Chuck Crisler]

There are many possible explanations why they yield different levels of
compression. You don't specify what parameters you are setting in them so
you are likely seeing different default options used by the encoders which
will yield differing compression ratios. You need to pay attention to the
profile and level, but also all of the other options that can be set. You
also need to pay attention to output bitrate, framerate and IFrame
interval. If you are generating a higher percentage of frames as IFrames,
then the resulting size will be much larger.


On Wed, Mar 5, 2014 at 9:05 PM, jonsmirl at gmail.com <jonsmirl at gmail.com>wrote:

> I'm evaluating several hardware h.264 encoders by feed them identical
> videos to compress. The output files from these compressors are all
> over the map in size. Does anyone know of a tool that would analyze
> the h.264 streams and give me an idea of why I'm getting these
> different results? I suspect there are bugs in a couple of the
> implementations such that they are compressing, but not as much as
> they should be.
>
> --
> Jon Smirl
> jonsmirl at gmail.com
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>
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