On Fri, Feb 3, 2017 at 5:36 PM, <u-9...@aetey.se> wrote: > >> So, what I don't >> understand then, is why below you're claiming that get_format() doesn't do >> this. this is exactly what get_format() does. Why do you believe >> get_format() isn't capable of helping you accomplish this? > > get_format() apparently returns to the caller a suitable format > from the supplied list. I read the documentation as carefully as > I can and my interpretation is that it is the application who > is to define the function and that it is the ffmpeg framework which > supplies the list of formats supported by the codec. I appreciate > if somebody corrects me and/or improves the documentation. > > But actually this does not matter in the particular situation. > None of the parties (the decoder, the framework, the application) > has all the necessary knowledge to be able to make the optimal choice. > It is the human operator/administrator who may know. The choice depends > among others e.g. on how fast swscaler is on the particular hardware > (use it or not?), how much is the contents sensitive to color > depths and so on. > How can get_format() help with answering these questions??). > > So get_format() is not a solution, mo matter how good or misleading > its documentation is.
"The application" can implement the get_format callback anyway it wants, ask the user by carrier pigeon for all we care - but such user interaction does simply not belong into the avcodec library - hence we have the get_format callback for that, so that the decision can be moved outside of the codec library and into the calling user-code. Clearly whatever application you are working with should implement these choices, and you should not try to shoe-horn this into libavcodec, where it clearly does not belong. We do not want hacks around the established systems just because it doesn't fit your use-case or workflow, sorry. - Hendrik _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
