Total newbie - Rendering - fps query

[Jake123]

Most probably a dumb query of mine , even so , would appreciate an answer , if pos :

Got some vids , camera recorded them at 25fps.

They were rendered at 30 fps. In simple language , what end effect does that have ? End result , noticeable to the average eye ?

Even though rendered at 30fps , end product , after rendering , says its 29fps.

I presume that if the camera recorded at 25fps , its advisable to render at 25fps... Yes/No ?

Thanks for your patience in answering , what are most probably dumb questions. I promise you , I dont have any more in mind , not for the moment , anyway , lol.

In anticipation .... Thanks for taking the time to answer my questions.

[DB83]

When you say 'rendered' what exactly do you mean ?

A typical effect of a straight conversion from 25 fps to 30 fps is that there is a slight stalling of the video every 5th frame since the 6th frame is a duplicate of the 5th.

However, the rendering could be done using pull-down. That is the 25fps is altered to 24 fps and 3:2 pull-down is then applied to convert to 30 fps. Result then is no visual difference to the video.

But, if video is recorded at 25 fps then you should 'render' at 25 fps unless you live in a country where 25 fps is not standard.

[jagabo]

Most probably a dumb query of mine , even so , would appreciate an answer , if pos :

Got some vids , camera recorded them at 25fps.

They were rendered at 30 fps. In simple language , what end effect does that have ? End result , noticeable to the average eye ?

It depends on the software. Most common is simply to duplicate 1 of every 5 frames, so 25 frames becomes 30 frames. This will create 5 little jerks every second. It will be noticeable whenever there should be smooth motion.

Even though rendered at 30fps , end product , after rendering , says its 29fps.

It was probably renderd at 29.97 fps (standard NTSC frame rate). Windows' file properties report drops everything to the right of the decimal point. Use a utility like MediaInfo to get more precise details.

I presume that if the camera recorded at 25fps , its advisable to render at 25fps... Yes/No ?

It depends on what you plan to do with the video.

[Jake123]

Thanks DB83 and JAGABO , for your prompt and clear answers.

Just what I was looking for. Nice and clear now.

Regards ... Jerk , er , mean : Jake(123)