Google Nest Video Timestamps

Forum|Forum|4 years ago
June 19, 2021
1 reply
1936 views

Hello friendly community.

I have several video clips from a Google Nest camera that I need to assemble for an investigation. The timestamps are embedded as subtitles by Nest and can be viewed in VLC or QuickTime by enabling the subtitles track.

My goal is to stitch together 20 clips, with the timestamp showing on every clip. I use Premiere Pro and Premiere Rush. When I import the clips into PP or PR I cannot see the subtitles, nor can I find a place to "turn them on."

I would greatly appreciate the help anyone can offer.

This topic has been closed for replies.

Stan Jones

Community Expert

Use the third party app MediaInfo and inspect one of the files. Use the "tree" view. Post the results here.

Also, look for a file with the same name as the video file, but a different extension - i.e. are the subtitles coming from a sidecar file?

Stan

K

Kimber5CD2Author

Participant

Here is the info from MediaInfo.
No, there is only one file.
Nest creates a single .MP4
When I open it in VLC I can choose Subtitles:SubtitleTrack:Track1 and I see the timestamp.
However, I cannot get those timestamps to display in either PR or PP.

General
Complete name : /Users/kimber/Downloads/Clip (May 31 2021 at 618 AM).mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom)
File size : 1.12 MiB
Duration : 38 s 611 ms
Overall bit rate mode : Variable
Overall bit rate : 243 kb/s
Encoded date : UTC 2021-06-20 10:15:55
Tagged date : UTC 2021-06-20 10:15:55

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=3, N=60
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 38 s 233 ms
Source duration : 38 s 100 ms
Bit rate mode : Variable
Bit rate : 227 kb/s
Maximum bit rate : 2 001 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 16.220 FPS
Minimum frame rate : 5.000 FPS
Maximum frame rate : 16 000.000 FPS
Original frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.015
Stream size : 1.03 MiB (92%)
Source stream size : 1.03 MiB (92%)
Tagged date : UTC 2021-06-20 10:15:55
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 38 s 611 ms
Source duration : 38 s 408 ms
Bit rate mode : Variable
Bit rate : 16.0 kb/s
Maximum bit rate : 18.2 kb/s
Channel(s) : 1 channel
Channel layout : C
Sampling rate : 16.0 kHz
Frame rate : 15.625 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 74.9 KiB (7%)
Source stream size : 74.9 KiB (7%)
Default : Yes
Alternate group : 1
Tagged date : UTC 2021-06-20 10:15:55

Text
ID : 3
Format : Timed Text
Muxing mode : sbtl
Codec ID : tx3g
Duration : 38 s 0 ms
Bit rate mode : Constant
Bit rate : 192 b/s
Stream size : 912 Bytes (0%)
Title : *subtitles.ttxt:hdlr=sbtl:lang=en:group=2:layer=1@GPAC0.5.2-DEV-revVersion: 0.5.2-426-gc5ad4e4+dfsg5-3+deb9u1
Default : Yes
Forced : No
Alternate group : 2
Encoded date : UTC 2021-06-20 10:15:55
Tagged date : UTC 2021-06-20 10:15:55

Stan Jones

Community Expert

Based on your attempt to import, PR does not appear to handle the embedded timed text stream. I'd look for an extractor to get the subtitles into .srt file.

I found this discussion:

https://forum.videohelp.com/threads/357915-Extracting-subtitles-from-m4v-mp4

Is PR handling the video stream? An interesting mix of variable frame rate.

Stan

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded