[FFmpeg-user] ffmpeg -ss start-time issue

[Henk D. Schoneveld]

On 27 Mar 2014, at 16:09, Moritz Barsnick <barsnick at gmx.net> wrote:

> On Thu, Mar 27, 2014 at 15:31:35 +0100, Henk D. Schoneveld wrote:
> 
>> Or at that point isn’t a I-frame/Keyframe and the nearest is taken.
>> It’s not possible to cut at an arbitrary frame without re-encoding to
>> an all I-frame/Keyframe file.
> 
> I think this is not true. I believe it should be phrased:
> It's not possible to cut at an arbitrary frame without re-encoding,
> unless the input is all keyframes.
> 
> When re-encoding, ffmpeg can seek to any frame.
I don’t understand what you mean. 
> 
> Cutting takes place before re-encoding and doesn't care about the
> output codec, as implied by your sentence.
I also don’t understand what you are trying to say.
Cutting at a non I/Keyframe gives distorted output, so first encode to all i/keyframes and after that you can cut at any frame. At least AFAIK.
> 
> Moritz
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