Control I-frame Size

[Umakant Goyal]

Thanks Michael, My Problem is that initial I-Frame size (bitrate) is very
high. I want to reduce the size of initial I-Frame.

How can i force encoder to do cyclic intra macroblock refresh instead of
periodical intra-frame refresh?

On Sun, Dec 4, 2011 at 2:42 PM, Michael Joachimiak <mjoachimiak at gmail.com>wrote:

> Bitrate fluctuation is normal in case of I-frame. I don't know if you can
> do much about it apart from using rate control.
> Do you use any rate control?
> Instead of having periodical intra-frame refresh you could have cyclic
> intra macroblock refresh. It means you do not refresh the whole frame at
> once but you have some macroblocks forced to be encoded as intra in every
> frame.
> Thus the whole frame is intra-refreshed after some period of time.
>
>
> 2011/12/3 Umakant Goyal <umakantgoyal1 at gmail.com>
>
>> Hi Ashwini, I think you misunderstood me. Here i am not talking about
>> picture size.I need to reduce the number of bits that is being produced by
>> encoder to generate I-Frame. Please suggest how to reduce the number of
>> bits for per I-Frame without loosing the quality much.
>>
>> Thanks
>>
>>
>> On Fri, Dec 2, 2011 at 4:43 PM, Ashwini Sharma <ak.ashwini at gmail.com>wrote:
>>
>>> Hi,
>>>
>>> I think you can use videoscale to do the job.
>>>
>>> --Ashwini
>>>
>>> On Mon, Nov 28, 2011 at 10:58 PM, Umakant Goyal <umakantgoyal1 at gmail.com
>>> > wrote:
>>>
>>>> Hi, What all settings of ffenc_h263 will help me to control/reduce the
>>>> size of I-Frame?
>>>>
>>>> Thanks in Advance
>>>>
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>>
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>
>
> --
> Your Sincerely
> Michal Joachimiak
>
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