Hey Daniel, actually that simple explanation was exactly what I needed.
Thanks for that!

On Thu, Dec 21, 2017 at 5:04 PM, Troy Sobotka <[email protected]>
wrote:

> On Thu, Dec 21, 2017, 1:30 PM Larry Gritz <[email protected]> wrote:
>
>> But for the common case of traversing the file in order, just reading
>> every frame sequentially (no seeks, except to the very next frame), it will
>> work? Or are there still circumstances where that also doesn't work?
>>
>
> Fails.
>
> Seeking sequentially should work for strictly P frame based codecs, but
> IIRC it failed due to the PTS code in some instances.
>
> It fails immediately for B frames as it obviously doesn't have the future
> I frame to decode.
>
> Both cases are extremely common, given that a majority of DSLR vendors use
> P frame compression by default.
>
> With respect,
> TJS
>
>>
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