MP4 HEVC file saved with incorrect frame rate.

[ABitTechSavvy]

Hello! I recently purchased a few cheap wifi security cameras on black friday. They're the Geeni Glimpse cameras made by Merkury.

Each camera has a 32GB MicroSD card installed and they seem to be functioning correctly.

One of the cameras saves files to the SDcard in an mp4 and I download it using the mobile app, but the file shows a video length of 0:00. It plays on the Android device but it plays faster than normal. When I view the meta data, it shows a frame rate of something crazy like 158798fps. The video is smooth with no other problems.

I can't load the video in any of the video editors I've tried and, so far, converting it hasn't helped either.

Is there a way to correct the frame rate issue? Other videos from the other cameras are 20-25fps.

The file is an mp4 HEVC.

Thanks for your help!

[ProWo]

Post a mediainfo report (text mode) of this mp4 here.

[ABitTechSavvy]

This is the report I got.

The clip is 30 seconds long. MP4 format. Won't play in Windows Media Player. In VLC it flashes one brief frame then exits. On the android tablet, it shows a time of 0:00 even though it's a 30 second clip. When played on the android tablet, it plays at 3-4x speed.

Thanks for your help!!


General
Complete name : C:\Users\Desktop\Downloads\173418737384079 (1).mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 1.52 MiB
Frame rate : 15.000 FPS
Writing application : Lavf58.29.100

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L5@Main
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 15.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0 (Type 0)
Bit depth : 8 bits
Stream size : 0.00 Byte (0%)
Source stream size : 1.51 MiB (99%)
Color range : Limited
Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B/G
Matrix coefficients : BT.470 System B/G
Codec configuration box : hvcC

[ProWo]

A simple remux could help.
There are private informations on this clip or can you upload it here?
So we can have a look.

btw

Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B/G
Matrix coefficients : BT.470 System B/G

should be

Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

for a hevc movie with 1920x1080

[ABitTechSavvy]

This is a link to a 30 second sample clip from the camera in question.

https://drive.google.com/file/d/190QCnT1_5AyYAv0p7LCHjNumxZD5eVMD/view?usp=drive_link

[davexnet]

Link is is not set correctly, it's asking for a signon

[ABitTechSavvy]

Link is is not set correctly, it's asking for a signon

Fixed

[jagabo]

You can demux the hevc stream to an elementary file, then remux it back with new timestamps:

ffmpeg -i input.mp4 -c copy intermediate.hevc
ffmpeg -r 15 -i intermediate.hevc -c copy output.mp4

[ProWo]

To make it simplier:
Use clever FFmpeg-GUI.
Drag your file, you're asket to insert the framerate (FPS), insert 15 and click OK.
Wait a few seconds. Done.
You'll find a new working mp4 in your output folder.

[ABitTechSavvy]

Thanks for all your help! Any idea what is going on? Why the camera is saving the file this way? Is something wrong with the firmware? Of the three purchased, this is the only one that has this problem.

[ProWo]

Thanks for all your help! Any idea what is going on? Why the camera is saving the file this way? Is something wrong with the firmware? Of the three purchased, this is the only one that has this problem.

You could try to reformat the SD-card.