Trying to get a reasonable frame number and timestamp

[Thibault Saunier]

s/data timestamp/decoding timestamp/

On Fri, Jun 14, 2019 at 6:42 PM Thibault Saunier <tsaunier at gnome.org> wrote:

> The DTS is the "data timestamp" not really something you care about. What
> you care about is the PTS, the offset is the number of frame for decoded
> frame, not encoded ones. I am not sure it is standardize for encoded frames
> at all.
>
> Thibault
>
> On Fri, Jun 14, 2019 at 6:12 PM pisymbol . <pisymbol at gmail.com> wrote:
>
>>
>>
>> On Fri, Jun 14, 2019, 11:07 AM pisymbol . <pisymbol at gmail.com> wrote:
>>
>>> I know this has been talked about around a thousands times on list. And
>>> I have read most of these threads but I am still getting what I think is
>>> strange behavior.
>>>
>>> Here's what I'm trying to do:
>>>
>>> I want to intercept every frame of an h.264 30 fps stream (not variable
>>> rate, life is good) and get its frame number and timestamp. So as I
>>> understand the doc, that should be in the GstBuf.dts and GstBuf.offset
>>> fields. I was going down the pad probe route but found that the identity
>>> plugin as per the doc a much easier and better route:
>>>
>>> So my first pipeline looked like this:
>>>
>>> ... ! omxh264enc bitrate=10000000 ! video/x-h264,
>>> stream-format=(string)byte-stream ! h264parse ... ! identity name=nvcamid0
>>> ! muxer
>>>
>>> Then I connected to the "handoff" signal for my callback and saw the
>>> following:
>>>
>>> dts : offset
>>> 0 : 816445297
>>> 106961 : 839200766
>>> 130469 : 849786717
>>> 151008 : 876858645
>>> 165810 : 909811526
>>>
>>>
>> I guess I'll take a look at source. But does anyone know what dst/offset
>> represent at this stage in the pipeline? My interest again is per frame.
>>
>> -aps
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>> gstreamer-devel at lists.freedesktop.org
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>
>
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