[Ffmpeg-devel] Re: getting the frame-rate
IOhannes M Zmoelnig
Thu Aug 25 17:44:23 CEST 2005
Burkhard Plaum wrote:
> For some formats, the framerate isn't constant, so even if you'll get some
> value for it, it will be meaningless. At least for asf, rm and mov/mp4,
> there is no other possibility than to use the individual timestamps
> of the frames.
i do not think that this is a valid argument.
most formats do have a constant framerate (i think); those with an
unknown or variable framerate could return an error-value or an invalid
framerate (like -1)
what happens if there are formats that do not have a constant image-size
any more ? will you remove the dimension-information from the API ??
(mpeg4 provides arbitrary shapes. whether it also provides a means to
change this shape in time, i dunno)
More information about the ffmpeg-devel