clever FFmpeg-GUI, a lightweight and portable GUI for FFmpeg

[TDS]

Originally Posted by ProWo

You can also remux it with clever FFmpeg-GUI.

I haven't gotten around to using that, yet.

I think you call it Multiplex ?

Anyway, I tried your suggestion, and after the remux, it retained it's HDR10 flag, and it's P-level of 5.1.

However, after a cut, the HDR10 flag was gone, and it was down to P-level 5. I think this happens due to the default setting being level 5.

Here's another suggestion, could you make the P-level adjustment available when doing ANY video editing/cutting, instead of having it as a separate option ?

Or, as I have suggested before, if there was a simple .ini type file that the user could edit, to suit their regular usage settings.

Baby steps..

[ProWo]

Newest beta (v3.1.0.01), online now.
Added: Keep section open checkbox (for audio and video encoding section).

[TDS]

Originally Posted by ProWo

Newest beta (v3.1.0.01), online now.
Added: Keep section open checkbox (for audio and video encoding section).

OK, I've just had a play with this, and I'm a little disappointed

But like you said, that "Keep" option is only for main video & audio encoding but not for the "Cut" function.

And I have to say, I don't think the frame accurate option is that accurate, it seems to use the keyframe position's

[ProWo]

Originally Posted by TDS

But like you said, that "Keep" option is only for main video & audio encoding but not for the "Cut" function.

In the next beta it's avaiable for the cut section too.

Originally Posted by TDS

And I have to say, I don't think the frame accurate option is that accurate, it seems to use the keyframe position's

This is not a contradiction.
It uses the keyframe AFTER the start cut point. Up to this point the video is re-encoded from the start point.

[TDS]

Originally Posted by ProWo

In the next beta it's available for the cut section too.

That will be nice

This is not a contradiction.
It uses the keyframe AFTER the start cut point. Up to this point the video is re-encoded from the start point.

So, it's not truly "frame" accurate !!!

Correct me if I'm wrong, but were the earlier builds more "accurate." ?

Can this be changed to be cut on the frame you want ?, generally keyframes can be a long way apart, and not that suitable for certain cuts.

[ProWo]

Originally Posted by TDS

That will be nice

So, it's not truly "frame" accurate !!!

Correct me if I'm wrong, but were the earlier builds more "accurate." ?

Can this be changed to be cut on the frame you want ?, generally keyframes can be a long way apart, and not that suitable for certain cuts.

It is frame accurate.
In order not to re-encode the complete video and thus enable smart rendering, several steps are performed here. First it is determined which part can be cut with keyframe cut, then the missing part (in the start area) is completely newly coded, (it is coded exactly from the start frame), then all audio tracks and subtitle tracks are cut frame accurate, then the two video parts are combined and finally everything is muxed together.
This is a really complicated process.

[ProWo]

Newest beta (v3.1.0.02), online now.
Added: Keep section open checkbox (for cut section), switch background color (with color button on start screen).

[TDS]

Originally Posted by ProWo

It is frame accurate.
In order not to re-encode the complete video and thus enable smart rendering, several steps are performed here. First it is determined which part can be cut with keyframe cut, then the missing part (in the start area) is completely newly coded, (it is coded exactly from the start frame), then all audio tracks and subtitle tracks are cut frame accurate, then the two video parts are combined and finally everything is muxed together.
This is a really complicated process.

Fair enough, but I can't get it to cut where I want it to, it just seems to choose the closest Keyframe, which is rarely at the correct time, it's either before or after the desired cut point , when using frame accurate.

[TDS]

Originally Posted by ProWo

Newest beta (v3.1.0.02), online now.
Added: Keep section open checkbox (for cut section), switch background color (with color button on start screen).

Just tried the latest beta, and it's just not doing what I need it to, like I said above, even in Frame Accurate, it's using the Keyframes, and they are not in the right place for the cuts I want to do

If there was some way of removing, or moving the Keyframes, that would be nice...

Like the colour button

[ProWo]

Originally Posted by TDS

Just tried the latest beta, and it's just not doing what I need it to, like I said above, even in Frame Accurate, it's using the Keyframes, and they are not in the right place for the cuts I want to do

If there was some way of removing, or moving the Keyframes, that would be nice...

The keyframes cannot be moved, they are set by the encoder during encoding.

I just did a test with a h264 video.
I loaded the video in Virtualdub2 and chose a B-Frame as startpoint.
As endpoint I looked for an I-frame.
I noted start time and end time and entered them into clever FFmpeg GUI,
selected Frame accurate cut above, pressed check times and then pressed cut.
Then checked the cut video in Virtualdub2.
The start frame fits exactly, the last frame is as desired the last P-frame before the entered I-frame (this guarantees a closed GOP).
So everything as desired, frame accurate and smart rendered.

[TDS]

Originally Posted by ProWo

The keyframes cannot be moved, they are set by the encoder during encoding.

I just did a test with a h264 video.
I loaded the video in Virtualdub2 and chose a B-Frame as startpoint.
As endpoint I looked for an I-frame.
I noted start time and end time and entered them into clever FFmpeg GUI,
selected Frame accurate cut above, pressed check times and then pressed cut.
Then checked the cut video in Virtualdub2.
The start frame fits exactly, the last frame is as desired the last P-frame before the entered I-frame (this guarantees a closed GOP).
So everything as desired, frame accurate and smart rendered.

Well, it seems to be the "luck of the draw", EVERY video is different, the one you tested obviously had the keyframes in the correct position for the cut, I mean, some of the episodes I've done have been perfect, and others don't come close to the desired cut point.

It's not your fault, it's just the way it is, unfortunately, it just doesn't work for me, on the videos I want to cut

I was hoping that I might have been able to do it with an avisynth script in the encoding app I use, but I can't get it to cut the audio, so that's even worse.

I have tried a couple of other app's, one I'd never heard of, "Lossless Cut", but it's got it's own problems.

So it's unfortunate, for me, that I can't use "clever" for my project, as far as video cutting is concerned, but it's still very good for audio processing

[TDS]

Hi ProWo,

Just wondering if there is a possibility to add a frame rate converter to "clever" ?

I understand that it can be done with FFmpeg, so hopefully just type in the new fps you want, and let it do it's magic?

Regards

[ProWo]

Originally Posted by TDS

Hi ProWo,

Just wondering if there is a possibility to add a frame rate converter to "clever" ?

I understand that it can be done with FFmpeg, so hopefully just type in the new fps you want, and let it do it's magic?

Regards

Do you mean change frame rate without reencode?
If so, this will not be added, because the result is a video poorly supported by many players.

[TDS]

Originally Posted by ProWo

Do you mean change frame rate without reencode?
If so, this will not be added, because the result is a video poorly supported by many players.

Not necessarily, if it has to be re-encoded, so be it.

[ProWo]

Originally Posted by TDS

Not necessarily, if it has to be re-encoded, so be it.

.
With reencode the frame rate change is already implemented.
Set the fps value like you want (in the video encode section) and reencode.

[TDS]

Originally Posted by ProWo

.
With reencode the frame rate change is already implemented.
Set the fps value like you want (in the video encode section) and reencode.

Oh, OK....I did look thru before I asked...maybe I didn't look in the right place.

Sorry & thanks.

Update:- couldn't get it to change fps

[tebasuna51]

The fps of a video stream can be changed without recode with eac3to for .h264 streams, or can be changed at container level with mkvtoolnix for mkv files.

I can't help you how make that with ffmpeg.

[ProWo]

Originally Posted by TDS

Update:- couldn't get it to change fps

Here in the example a 23.976 fps video is transcoded into a 25 fps video. The change length checkbox is used to adjust the duration of the video to the new frame rate, so all frames remains unchanged.
If it is not checked, the duration remains unchanged, but frames are dropped or added.

[locotus]

Do that solution work for telecined content?

[TDS]

Originally Posted by ProWo

Here in the example a 23.976 fps video is transcoded into a 25 fps video. The change length checkbox is used to adjust the duration of the video to the new frame rate, so all frames remains unchanged.
If it is not checked, the duration remains unchanged, but frames are dropped or added.

Well, it's nice to get the instructions from the creator, HOWEVER, this is NOT doing what I was expecting it to...

This actually increases the video playback speed, and reduces the length of the clip

I need it to increase the frame rate from 23.9xx to 60 fps without ANY increase in "speed".

This clip was about an hour long, but it's now less than half, and after doing all those settings & clicking "Encode", it was done in an instant, and produced a 0kb file