ffmpeg change frame rate on muxing not working,...

[Selur]

I wanted to convert a 25fps video to 23.976 fps.
So I extracted the video and re-encoded the audio while stretching the audio.
So far so good.

Using:

ffmpeg -y  -r 24000/1001 -itsoffset -00:00:00.053 -i "E:\Output\2020-12-09@12_22_26_2010_03.m4v" -i "E:\Output\iId_1_aid_1_DELAY_-53ms_2020-12-09@12_22_26_2010_02.aac" -absf aac_adtstoasc -vcodec copy -acodec copy -map 0:0 -map 1:0  -aspect 181818:100000 -r 24000/1001 "E:\Output\ffmpeg.mp4"

I end up with async playback, since the video streams fps is ignored.
MediaInfo still reports:

Video
ID                                       : 1
Format                                   : MPEG-4 Visual
Format profile                           : Advanced Simple@L5
Format settings                          : BVOP
Format settings, BVOP                    : Yes
Format settings, QPel                    : No
Format settings, GMC                     : No warppoints
Format settings, Matrix                  : Default (H.263)
Codec ID                                 : mp4v-20
Duration                                 : 17 s 160 ms
Bit rate mode                            : Constant
Bit rate                                 : 723 kb/s
Width                                    : 640 pixels
Height                                   : 352 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 25.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.128
Stream size                              : 1.48 MiB (84%)
Writing library                          : XviD 1.1.2 (UTC 2006-11-01)
Menus                                    : 3

I expected to get something like:

Frame rate                               : 23.976 FPS
Original frame rate                      : 25.000 FPS

-> So does someone know how to do this with ffmpeg?

Cu Selur

[Ennio]

Would not know about mpeg-4 visual, but maybe reading on how to do for hevc-stream would help?

https://forum.videohelp.com/threads/389376-Changing-frame-rate-of-HEVC-MKVs#post2522592

[Selur]

A bit stream filter would only be needed to change the frame rate of the stream, I would be happy if ffmpeg would at least change the frame rate on the container level, like mkvtoolnix and mp4box do.
Sadly there is no such bitstream filter for MPEG-4 ASP (https://ffmpeg.org/ffmpeg-bitstream-filters.html).