AviDemux "PAL to Film" audio filter

[nnever2000]

Is that "film" 23.976 or 24.000 fps?

[LoRd_MuldeR]

I don't know, but the name "PAL to Film" implies that this filter will adjust the audio for 25fps to 24fps conversion ;)

Films are captured at 24 fps for cinema, but they speed it up to 25 fps for TV broadcast in PAL countries.
So I think this filter is intended to reverse that speed-up and restore the original 24 fps with proper audio sync.

NTSC is a different storry. Telecine/IVTC :rolleyes:

[nnever2000]

I don't know, but the name "PAL to Film" implies that this filter will adjust the audio for 25fps to 24fps conversion ;)

Films are captured at 24 fps for cinema, but they speed it up to 25 fps for TV broadcast in PAL countries.
So I think this filter is intended to reverse that speed-up and restore the original 24 fps with proper audio sync.

NTSC is a different storry. Telecine/IVTC :rolleyes:

Ok, I need "pal to 23.976" how I can do with AviDemux that?

[LoRd_MuldeR]

Ok, I need "pal to 23.976" how I can do with AviDemux that?

That means you want to convert from 25 fps to 23.976 fps.

Did you try the "Resample FPS" video filter? This filter will "change framerate while keeping duration".
You shouldn't need to mess around with the audio at all...

[nnever2000]

That means you want to convert from 25 fps to 23.976 fps.

Did you try the "Resample FPS" video filter? This filter will "change framerate while keeping duration".
You shouldn't need to mess around with the audio at all...

???? Changing the video automatically change the audio? A step ahead versus virtualdub!!

I will tell you if it work! Thanks

[nnever2000]

???? Changing the video automatically change the audio? A step ahead versus virtualdub!!

I will tell you if it work! Thanks

It doesn't work. Even selecting the 23.976 video, the audio is sticky to "COPY" mode, I think it should be "PROCESS"...........

[LoRd_MuldeR]

Nooooo. You keep audio as-is. No need to touch the audio as long as the duration of the video doesn't change.
Simply apply the "Resample FPS" Video Filter, which can be found in the Video Filter Manager window.
As said before, this filter will change the framerate of the video while keeping the length, so audio will remain in sync!

Audio can be "Copy", as long as you don't want to re-encode. But Video can not remain at "Copy" to make this work ;)
So set Video to "MPEG-4 AVC (x264)" or "MPEG-4 ASP (Xvid)" or whatever you like...

[nnever2000]

Nooooo. You keep audio as-is. No need to touch the audio as long as the duration of the video doesn't change.
Simply apply the "Resample FPS" Video Filter, which can be found in the Video Filter Manager window.
As said before, this filter will change the framerate of the video while keeping the length, so audio will remain in sync!

Audio can be "Copy", as long as you don't want to re-encode. But Video can not remain at "Copy" to make this work ;)
So set Video to "MPEG-4 AVC (x264)" or "MPEG-4 ASP (Xvid)" or whatever you like...

ok, I understand! Is PAL to NTSC losing frames. Thanks! I will try.

[mean]

Film in that case is 23.976

[nnever2000]

Film in that case is 23.976

Using that option I have no audio at all! Tried all codec (MP2, MP3,Lame) when "PAL to film" is selected the output avi has no audio............ maybe is a bug?

[LoRd_MuldeR]

I tried the "PAL to Film" audio filter once and the resulting audio quality was horrible :o

Did you try to keep the audio duration as-is and change the frame-rate with the "Resample FPS" filter ???

[mean]

Both filters were enhanced in 2.4.2
(Pal2film & film2pal)

It was buggy in prior versions, make sure you use 2.4.2 or later svn.

[nnever2000]

Both filters were enhanced in 2.4.2
(Pal2film & film2pal)

It was buggy in prior versions, make sure you use 2.4.2 or later svn.

Ok, in fact I'm using 2.41.............. I will try.

Thanks

Anyway, the final quality is similar to BeSweet?

[LoRd_MuldeR]

I used Avidemux 2.4.2. The source was 25 fps, captured from DVB-S. I used "Video -> Framerate" to set the framerate to 24 fps.
Then I used the "PAL to Film" audio filter to adjust the length of the audio. The result didn't sound very good...


[EDIT]

Here is a sample:
http://www.mediafire.com/?l8lbgisjwov (Password: Avidemux)

The framerate was changed from 25 fps to "FILM - 24 FPS" via Video -> Framerate. Also the "PAL to Film" audio filter was used.
Should be easy to notice that the audio quality isn't acceptable. Original audio is included in download too...

[locotus]

I have done some audio/video fps change with avidemux.
What i do is work with the audio not the video, which is the
opposite to what LoRd_MuldeR suggest.

And never change both in the same process. Because you'll
end with a shorter audio.

[LoRd_MuldeR]

Of course you either chnage the number of frames and keep the audio "as-is" or you keep the number of frames and change the length of the audio track.
Doing both at the same times doesn't make any sens to me. But the latter case, resample the audio track, doesn't work good for me (see sample above).

[nnever2000]

Of course you either chnage the number of frames and keep the audio "as-is" or you keep the number of frames and change the length of the audio track.
Doing both at the same times doesn't make any sens to me. But the latter case, resample the audio track, doesn't work good for me (see sample above).

Ok, I'm I bit confused now.

I have to convert the video to 23.976 (preserving the frames number), so I have to use the "process" option.
Then I have to change the audio because It should be longer, so I have to use the "process" option.
So, process for both.
Anyway the audio quality seem bad, and "pal->film" seem to be 25fps to 24fps and not 23.976.
So I reverted on my previous process: audio with BeSweet and video with VirtualDub.

Thanks anyway

[Comatose]

Is pal2film the equivalent of assumefps(24000,1001,sync_audio=true).ssrc(audiorate) in Avisynth?

[LoRd_MuldeR]

I think in Avidemux "PAL to Film" is an audio-only filter. It will change the duration of the audio track.

If you change the framerate from 25 fps to 23.976 fps while keeping the number of frames, the playtime will change and the audio will desync.
Therefore the "PAL to Film" audio filter is required to adjust the duration of the audio track and make it sync to the video again...