Hi Evert, I made a change in MLT to fix the frame rate override. However, it does not automatically change the duration of the clip accordingly and requires a funky MLT XML workaround. It will not be possible to make it automatically adjust the duration within the framework or plugin due to a design limitation. You see, the duration is computed when the ffmpeg object is created, but it does not know the new frame rate at that time! The new frame rate is supplied as a property after the object is created. Therefore, the app needs to make this duration adjustment when the user overrides the frame rate.
In the meantime, here is what you can do (after updating mlt from git master): 1.) melt gopro.mp4 force_fps=60 -consumer xml | grep length 2.) do the math: new_length = length * (native_fps / force_fps). For the file you provided, new_length = 925 * (240/60) = 925 * 4 = 3700 3.) supply the new value to melt to create a MLT XML wrapper: melt gopro.mp4 length=3700 out=3699 -consumer xml:gopro.mlt (Out is always one less than duration and must be provided when overriding the duration.) Now you can use gopro.mlt like a clip with either melt or kdenlive. On Sat, Nov 3, 2012 at 12:09 PM, Evert Vorster <evors...@gmail.com> wrote: > Ah, great. > > I was not aware that you were out of town, and mistakenly assumed that you > had forgotten about the footage. > > Hope you are having a great weekend! > -Evert- > > > > On 3 November 2012 20:48, Dan Dennedy <d...@dennedy.org> wrote: >> >> I made some quick tests while I was out-of-town. I am not sure at this >> time what the effort it. I will be looking into it over next week. >> >> On Sat, Nov 3, 2012 at 2:00 AM, Evert Vorster <evors...@gmail.com> wrote: >> > Hi there, Dan... >> > >> > Have you had a look at that 240fps footage I sent to your ftp server? >> > >> > How much work would it be for kdenlive to be able to support slowing >> > down >> > such footage natively without me having to mess with ffmpeg? >> > >> > Kind regards, >> > -Evert- >> > >> > -- >> > Those who do not understand UNIX are doomed to reinvent it, poorly. ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Kdenlive-devel mailing list Kdenlive-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
