[gst-devel] Timestamping a video file with gstreamer

[jeetu.golani at gmail.com]

Hi Marco,

Thanks so much for the reply. For now I'm using a non-gstreamer
workaround by using the subtitle approach to solve my problem since I
needed something quick. I still think that your suggestion of
reworking timeoverlay and adding a property will probably be better
and may even help get a frame level based accuracy (?) If I do get a
chance I'll defi look at the code and see what it takes to put in the
functionality :)

Thanks again :)

Bye for now

On Sun, Jan 23, 2011 at 2:00 AM, Marco Ballesio <gibrovacco at gmail.com> wrote:
> Hi,
>
> late reply, I hope it will help anyway..
>
> On Tue, Jan 18, 2011 at 12:02 PM, jeetu.golani at gmail.com
> <jeetu.golani at gmail.com> wrote:
>> Hello,
>>
>> First, I'm new to gstreamer and video manipulation and file formats in
>> general, therefore forgive me if what I ask is obvious :)
>>
>> I would like to timestamp a video file sort of like how the timeoverlay and
>> clockoverlay elements do. However, I would like the time to begin from the
>> time the file was recorded. I'm using MythTV to record video and upon
>> recording I would like the file (or a clip) to be transcoded with the
>> timestamp - am open to having the final recording in any of the popular
>> container formats. My questions:
>>
>> - Is there a way for me to overlay a user defined time? Can I somehow
>> manipulate the buffer or using some means introduce a time into the stream
>> using the timeoverlay/clockoverlay elements?
>
> >From what I see in timeoverlay and clockoverlay sources, you'd need to
> hack the elements in order to add an initial offset. If you make a
> property out of it, there could be some interest for upstream.
>
> As an alternative, you can use a textoverlay and a timer in your
> application which makes it change the content (for instance) each
> second to the time you prefer.
>
>> - Can I somehow introduce a timestamp in the file container itself and then
>> this gets used as the start time?
>
> It looks really hackish and results may be not what you really want
> when you try to play back the file again.
>
> Regards
>
>>
>> Google has so far not been able to provide me with my answers (or maybe I've
>> been looking in the wrong place). There is mention of a patch for
>> mencoder/mplayer that provided this functionality but that's obsolete now.
>> Same for ffmpeg that provided something similar using a vhook plugin.
>>
>> I would sincerely appreciate your help on this. I'm definitely on my wits
>> end :)
>>
>> Thanks
>>
>> Bye for now
>>
>>
>> ------------------------------------------------------------------------------
>> Protect Your Site and Customers from Malware Attacks
>> Learn about various malware tactics and how to avoid them. Understand
>> malware threats, the impact they can have on your business, and how you
>> can protect your company and customers by using code signing.
>> http://p.sf.net/sfu/oracle-sfdevnl
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>
>>
>
> ------------------------------------------------------------------------------
> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
> Finally, a world-class log management solution at an even better price-free!
> Download using promo code Free_Logger_4_Dev2Dev. Offer expires
> February 28th, so secure your free ArcSight Logger TODAY!
> http://p.sf.net/sfu/arcsight-sfd2d
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>