Timestamp information of MP4

Question

I want to ask for an easy way to get the timestamp information of a mp4 file. (Sorry that I am not familiar with codec.)

I am reading the Tobii Pro Glasses SDK document that explains how to synchronize frame with eye tracking data, where they use a terminorlogy called VTS. Goolge cannot find the exact meaning, so I want to ask for what VTS really stands for and how to get it from a mp4 file. Thanks very much!

This is worth having a look at if you need to understand time stamps in video as it is a little (!) tricky: http://dranger.com/ffmpeg/tutorial05.html — Mick, Jul 25 '16 at 15:19

score 5 · Accepted Answer · answered Jul 25 '16 at 13:32

5

You can use ffprobe.exe as follows:

ffprobe -i 396025.MP4 -show_packets

Refer to https://www.ffmpeg.org/ffprobe.html

answered Jul 25 '16 at 13:32

Rotem

30,366
4
32
65

Thanks. I can see the packets. But I did not find the so-called vts-time information. Do you know what vts-time stands for? And also TLSV? – Zhenjie Zhao Jul 25 '16 at 13:49
I hoped VTS stands for "Video Time Stamp", but I think it's an internal term used by Tobii Pro Glasses SDK. Sorry, but I can't find it eater. – Rotem Jul 25 '16 at 14:12
Yes. Thanks anyway. The SDK document is kind of vague. – Zhenjie Zhao Jul 26 '16 at 13:10
In Tobii Glasses SDK vts packages in data stream basically define a map points between glasses internal clock (which is used to timestamp gaze data and data from any other stream) and video file samples time. So whenever you have entry with zero vts value, it's timestamp defines where vide file starts in relation to – Volodymyr Dombrovskyi Mar 26 '17 at 01:14

Timestamp information of MP4

1 Answers1