[ Ccing you, but no need to Cc me. ] Le primidi 21 fructidor, an CCXXV, Thierry Foucu a écrit : > Sorry I did not know and I did not see any documentation in the header > explaining which field of the AVFrame can/cannot be used by filter.
Yes, it lacks documentation. > If we cannot used the duration of the AVframe, how can we resolve the > problem I'm trying to resolve. > For example, if you take a video with a fps of 1 frame/second and you are > trying to convert it to 30fps, the duration of the output file will be > shorter by 1 second. > Knowing the last frame duration allows us to pad the last video frame with > the correct fps. > > You are saying there is an old patch series to ensure it. How far are you > with it? > With the patch you are talking about, will we be able to do what i'm trying > to do with this patch? Yes, it is meant exactly for that. The patch series I was referring is this one: https://ffmpeg.org/pipermail/ffmpeg-devel/2017-September/215988.html https://patchwork.ffmpeg.org/patch/5024/ (and next) I thought I had cced you on one of the patches, but it may have been ignored. With this patch series, when a filter reaches EOF, the link->current_pts contains the timestamp of the end, including the duration of the last frame: from that, you can implement your patch in a very similar way. (Although vf_fps would need to be rewritten to take advantage of the link's FIFO, but that is more work, and not required immediately.) Regards, -- Nicolas George
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