FPS problem.

lennich

New member
I have MP4 files I have downloaded from security cameras. They seem non-standard in some way but I got something I could look at, yet the files report as 25fps and run at (probably) double that speed.

Is there some way I can use VideoRedo to slow down replay on a saved file?
 

hydra3333

Member
Hello.
Have you run mediainfo over one of the files so you can check and report their media content characteristics ? ... and therefore determine how to do whatever the results show needs to happen to the files ;)
Unsure of your expertise, so:
- it's a DOS program
- find the portable version "Download MediaInfo 20.09 Portable Windows 64-bit" at https://www.videohelp.com/software/MediaInfo and download it
- start a CMD (dos) window and run mediainfo over the file, like: \path_to_mediainfo_exe\mediainfo.exe --full "\path\filename.mp4" > "mp4_results.txt"

cheers
 

Dan203

Senior Developer
Staff member
Tools->Options->H.264/HEVC

Change the source frame rate option to "from container" and see if that works. If not try the other options as well and see if any of them help.
 

lennich

New member
Hello.
Have you run mediainfo over one of the files so you can check and report their media content characteristics ? ... and therefore determine how to do whatever the results show needs to happen to the files ;)
Unsure of your expertise, so:
- it's a DOS program
- find the portable version "Download MediaInfo 20.09 Portable Windows 64-bit" at https://www.videohelp.com/software/MediaInfo and download it
- start a CMD (dos) window and run mediainfo over the file, like: \path_to_mediainfo_exe\mediainfo.exe --full "\path\filename.mp4" > "mp4_results.txt"

cheers
Thanks for the reply. I have the Windows version of MediaInfo. I can't actually load the original files into VideoRedo so I ran them through WinFF to get something that would load. And it gives a 25fps file, making assumptions I presume. MediaInfo gives this as an exmple of the original:

General
Complete name : E:\00000_3RD_WhiteCam\SD100003225\058431248\record\2020\08\01\08\083214.data
Format : AVC
Format/Info : Advanced Video Codec
File size : 3.19 MiB
FileExtension_Invalid : avc h264 264

Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : @L12.9 / Main@L4.2
MultiView_Count : 1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Format settings, GOP : M=1, N=15
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

My guess would be the fps is therefore 12.9 and was hoping I could fix this in VideoRedo.

Cheers,
Len
 

Dan203

Senior Developer
Staff member
That means that there is no fps in the original file.

Try using MKVToolNix to remux this file into an MKV and manually setting the frame rate to 15fps. (this is more likely the original fps as it's common for security cameras)
 
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