[FFmpeg-user] MPEG-PS

[Peter]

Hi,

 > what is "absolute timestamp", a security cam's time timecode burned into
 > video ? pts ?

You are very good at guessing.  It is security cam time code. It is 
burned somewhere in the meta info, because their windows desktop player 
gives timing like this:

2020/09/27 11:33:24

while other players give:

00:00:11 i.e relative time from the beginning.

The only vague information I found is:

https://dmeforensics.com/analysis-of-hikvision-date-time/

So I am trying to find a way to get this extra information about the 
absolute epoch/date time timestamp :-)

Thanks :-)

Peter


On 27/09/2020 04:07, andrei ka wrote:
> hi,
> what is "absolute timestamp", a security cam's time timecode burned into
> video ? pts ?
> i'd keep guessing, " Play the files on web using Nginx and Video.js" means
> you want to encode to hls, hand it to nginx for streaming and play that
> m3u8 url with ffmpeg giving "-ss hh:mm.ss..."  parameter ?
> ak
>
> On Sat, Sep 26, 2020 at 3:37 PM Peter <peter at aboutsupport.com> wrote:
>
>> Hi,
>>
>> I have a file MPEG-PS, AVC264 with audio code G711u.
>>
>> It does contain absolute timestamp in each frame i.e I can say when
>> exactly each second of this video was shot.
>>
>> I want to do the following:
>>
>> 1. Extract absolute timestamps from the video
>> 2. Convert the file to MP4 h264 with some more web friendlier audio
>> codec i.e aac.
>> 3. Play the files on web using Nginx and Video.js and be able to search
>> by absolute timestamp.
>>
>> I am aware that most likely I will need to store absolute timestamp in
>> separate files as I cannot put them in mp4.
>>
>> Any help/feedback is welcome :-)
>>
>> Thanks,
>>
>> Peter
>>
>>
>>
>>
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>> To unsubscribe, visit link above, or email
>> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
>