[FFmpeg-devel] FFv1.3: full GOP 1/300, 2-pass statistics for Derf's collection
pb at das-werkstatt.com
Sun Dec 9 23:33:58 CET 2012
On 12/05/2012 06:12 AM, Loren Merritt wrote:
> On Wed, 5 Dec 2012, Peter B. wrote:
>> It's very interesting to see that 2-pass with GOP=1 reaches almost the
>> same compression ratio as single-pass with GOP=300. In some cases, it's
>> even small than GOP=300 (marked red).
> Of course. Each of your test videos is a single scene. The probability
> tables don't need to change much from one frame to the next, because the
> content doesn't change much.
> The same result *might* also hold for a whole movie, but your experiment
> doesn't predict that one way or the other.
I've now ran it on material from our archive. Some of it is available
They're from VHS and Digibeta, and definitely contain several scenecuts,
The results match those of Derf's collection and can be seen here:
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