Change frame rate?

[cincilator]

Hi to all

Well, have some 3D video, and want to watch it on my TV, but video is 47 FPS, so I cant watch it because TV support max 30 FPS.
Just want to mux it to 23... or whatever FPS, but having trouble with audio.

Downloaded MKVMerge, and when I opened file, there are 2 files: V_MPEG4 and A_AC3.
I read online some solutions with changing FPS, also stretching... etc

Tried few combination like changing FPS for video, and stretching audio, but nothing, time is bigger then original, original is 47min and muxed file is 1:37?
Also tried stretching both, but video is longer and audio is intermittent.

So, in short, how to change FPS to 23.976, but also to sync audio?

PS Every time when I stretched audio, I got intermittent sound, every half second sound is lost, and then returned...?

PS2 Sorry for my bad english and THANKS

[jagabo]

If you remux a 48 Hz movie down to 24 Hz it will run twice as long. That's not practical. You have to re-encode, throwing away every other frame.

[Cornucopia]

Hold on thar, Tex!

Where in the world did you come up with 47fps? NO standard camera, nor standard CGI render setting outputs to 47fps. So either this is already a botched job, or you (or your application) are misreading the fps.

Run it through MediaInfo and give us the Longform/Complete text output...

Scott

[jagabo]

Where in the world did you come up with 47fps? NO standard camera, nor standard CGI render setting outputs to 47fps.

Windows drops digits to the right of the decimal point when it displays frame rates. For example, a 23.976 fps AVI file:



In all likelihood his file is 47.952 Hz.

[cincilator]

Thanks for answers

If there is some other soft please suggest me.

Here is the whole Media Info:

General
Unique ID : 168348648403719580577546155723716462494 (0x7EA6C532C2870C1E037BA147C20E879E)
Complete name : D:\VIDEO\3D\IMAX Space Station 3D 1080p Half-SBS AC3\IMAX Space Station 3D 1080p Half-SBS AC3.mkv
Format : Matroska
Format version : Version 2
File size : 2.02 GiB
Duration : 47mn 11s
Overall bit rate : 6 126 Kbps
Writing application : Lavf51.12.1
Writing library : Lavf51.12.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L1.3
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=12
Codec ID : V_MPEG4/ISO/AVC
Duration : 47mn 11s
Bit rate : 5 940 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 47.923 fps
Original frame rate : 47.952 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.060
Stream size : 1.96 GiB (97%)
Default : Yes
Forced : No

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 47mn 11s
Bit rate mode : Constant
Bit rate : 64.0 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 21.6 MiB (1%)
Default : Yes
Forced : No

[jman98]

cincilator - You probably should NOT go into details at all if you downloaded this. We have rules against such things.

Whoever made this clearly did not know what he was doing. Look at the audio. The bit rate is pretty darn low even for AC3 and it got resampled to 44.1 kHz. Maybe the guy who made this somehow doubled the frame rate by accident but as I do not work with 3D video at all, I am just guessing here. Perhaps there is something related to the SBS that led to this doubled frame rate. The format profile in the video is unnecessarily low. Yeah, this has all the marks of being done by someone who didn't know what he was doing. I guess it could be worse in that whoever made it could have found a way to make it interlaced and at least that didn't happen.

[johns0]

Please buy the movie,thread closed.