[FFmpeg-devel] [PATCH] H.264 I-frames with SEI are also key frames

[Jason Garrett-Glaser]

On Thu, Mar 5, 2009 at 11:52 PM, madshi <dear at madshi.net> wrote:
> Loren Merritt schrieb:
>> On Thu, 5 Mar 2009, madshi wrote:
>>
>>
>>> Would it make sense to consider I-slices as key frames only
>>> if no SEI recovery points are in the stream? Or in other
>>> words: As soon as you find a recovery point, you might no
>>> longer want to treat every I-slice as a key frame in that
>>> particular stream.
>>>
>>
>> Not as a general strategy to apply to all streams. What about those that
>> have plenty of IDR-frames, and plenty of non-key I-frames, and no
>> recovery point SEIs? (i.e. everything generated by x264)
>>
>> --Loren Merritt
>>
>
> My suggestion is no worse in any way than the original
> suggestion, which was to handle all I-frames as key frames
> with no questions asked.
>
> Ok, how about an improved version of my suggestion:
>
> If:
>
> (1) there haven't been a new IDR frame for 3 (?) seconds runtime and
> (2) there was not a single SEI recovery point in the stream as of yet
>
> In this situation treat all I-frames as key frames.
>
> Not sure about the runtime. In what distance does x264 usually
> place IDR frames?

>= --min-keyint

Dark Shikari