What is native frame rate

[Prathamesh]

Hi All,

I'm new to the Media Industry. One of our clients has the below requirements :

1) H.264 with minimum 9mbps for SD
2) Native Frame rate
3) 720x480, Aspect ratio - 16:9 Anamorphic.

We normally process files with 23.976 & 29.97 fps.

I'm a little confused what native frame rate the client wants (or what native frame rate means in general)

The source files we receive are 25 fps.

Kindly provide your suggestions

Regards.

[newpball]

Native frame rate is the rate that the camera or scanner serves frames to either the internal CODEC, for recording, or to an external link.

This rate is usually, but no always, the same as the framerate recorded by the CODEC.

[smrpix]

The source files we receive are 25 fps.

Native frame rate refers to the source, your source material's native frame rate is 25.

To make things a little more complicated, however. 25fps Standard Definition (PAL) is traditionally delivered at 720x576, but since h.264 is agnostic about that, 720x480 16:9 would still be doable.

No reason not to ask the client for a clarification based on their intended use.

[manono]

Then your native frame rate is 25.

I'm not so sure it's as simple as that. If it's from a film the 'native' or original frame rate was 24fps and it was speeded up or otherwise converted to PAL 25fps.

I think he should go back to the client and ask for clarification. Notice he's from India (at least I think he is) where they, as a rule, are stuck with 25fps tape sources with which to work. If it's from a movie I would first slow both the audio and video back to film speed.

[newpball]

Then your native frame rate is 25.

I'm not so sure it's as simple as that. If it's from a film the 'native' or original frame rate was 24fps and it was speeded up or otherwise converted to PAL 25fps.

I think he should go back to the client and ask for clarification.

Indeed!

If it is film based it was likely sped up from 24 to 25fps, so for NTSC regions it needs to be slowed to the original speed (and a little more) and telecined.

If can make all the difference between doing a good job and butchering the source by frame blending the 25fps to 30i.

[smrpix]

It may be sourced from 24fps film, but that's speculating beyond the scope of what OP has indicated.

[manono]

It may be sourced from 24fps film, but that's speculating beyond the scope of what OP has indicated.

It's way more than speculation but only Prathamesh can say for sure.

[newpball]

It may be sourced from 24fps film, but that's speculating beyond the scope of what OP has indicated.

If he is not sure he should check with the client. That is good advice!

Assumption is the mother of all....?

[Prathamesh]

Hi Guys,

Thanks a lot for your replies.

I spoke with the client, he needs the file in pure 24fps only.

We get the source in 25fps because that is what the production houses here provide.