Video duration

Fri Feb 10 13:17:16 UTC 2017

I am no professional with matroska so I might be wrong on my suspicion, but
I do not think
it is a streamable container like e.g. mpegts is. If that is the case then
you can not rely on the
duration timestamp being updated unless the file is closed correctly.

So if that is correct the only things youa re really left with is: a) fix
the source app so when it
"crashes" it produces an eos and handles shutdown gracefully or b) change
the container
to something that is independent of graceful shutdown. If the source app
crashes are
within your power to fix I would focus on that. You can't rely on the
output of an erroneous
pipe.

Dimitrios

On Fri, Feb 10, 2017 at 11:51 AM, Michael Yarochkin <
michael.yarochkin at timetronics.be> wrote:

> Hello, Demitrios
>
>
> Thank you for answer.
>
>
> Ok. So, playbin can "see" all frames. This is already good news. Thank you.
>
> However, i can not use it in my app. I need more control on a stream.
>
>
> Yes, my original question was about duration. Because that what i need to
> continue working with file.
>
> -It is a way to get duration from "not finished" file?
>
> -Now playbin doing this?
>
>
> Encoding pipeline is:
>
> appsrc ! videoconvert ! jpegenc ! matroskamux ! filesink
>
>
> Decoding pipeline is:
>
> filesink ! matroskademux ! queue ! jpegdec ! videoconvert ! jpegenc !
> appsink
>
> My problem is in not correct handling of EOS. Sometimes, my app is not
> working well and i have files like this. You can name it bag.
>
> But in any way i need to be able to process this files.
>
>
> Can you help me, please?
>
> Do you need more information from me?
>
>
> Thank you in advance.
>
>
> Mikl
>
>
> ------------------------------
> *From:* gstreamer-devel <gstreamer-devel-bounces at lists.freedesktop.org>
> on behalf of Dimitrios Katsaros <patcherwork at gmail.com>
> *Sent:* Friday, February 10, 2017 10:09:07 AM
> *To:* Discussion of the development of and with GStreamer
> *Subject:* Re: Video duration
>
> Like most things, answering questions is not as simple as a you are right
> or you are wrong.
> Even typing out a 2 liner answer may have much more behind it. But to the
> problem:
>
> Using the discoverer i can see that your file duration is:
> 0:00:00.400000000. So as you stated,
> the video duration is wrong. Using playbin gives the same results as VLC:
>
> gst-launch-1.0 playbin uri=file:///path/to/file//2017.02.03\ 13.53.34.mkv
>
> So you can use that for playing the video. However, your original message
> was about duration
> queries. And the reason the duration query is incorrect is because the
> file has been encoded
> with that duration.
>
>
> For future reference a description of your entire pipeline would help us
> to understand
> what you are doing. If you want help fixing the file I would suggest
> writing a gst-launch
> like description of the encoding pipe so we can see why there is a problem
> with the generated file.
>
>
> Dimitrios
>
>
> On Fri, Feb 10, 2017 at 8:58 AM, Mikl <michael.yarochkin at timetronics.be>
> wrote:
>
>> Hello, Dimitros
>>
>>
>> Thank you for the answer.
>>
>>
>> Long story short:
>>
>> I am recording video and subtitles from appsrc in MKV container.
>>
>> In VLS video is full, but i don`t see length. So, it is corrupted. I did
>> not handle EOS correctly. This i know.
>>
>> But my question is "how to do the same as VLC".
>>
>>
>> Can you help me? Do you need more details? My source code? Video file?
>>
>>
>> PS
>>
>>
>> I am only half year busy with GStreamer. Of course my questions are "something
>> very generic". I know concept, understand idea, but don`t familiar with
>> details and can stuck on simple thing.
>>
>> How i can stop asking them without You help? You are THE ONLY source of
>> information.
>>
>>
>> What information do you need to from me "help me to find direction to
>> solution"?
>>
>> You will never know it without asking. Yes?
>>
>> Even "try this..." can help.
>>
>>
>> PPS
>>
>>
>> My question was 2 weeks on board and already on second page. it was 13
>> views and no reaction.
>>
>> And you see reaction after offer to kill someone. [image: 😊]
>>
>> Sorry to do this.
>>
>>
>> I completely understand, what every one doing this in free time. As a
>> hobby. Do you believe, what i am doing the same. Answering questions
>> when on this mail list when i have time and know answer.
>>
>> But, as a community we need to help to each other to grow! Isn't it?
>>
>> My question is simple. It cost nothing for somebody who have years of
>> experience to say "you are wrong in this. here is the link."
>>
>> At least how i think and do.
>>
>> Sorry for long complain. :)
>>
>>
>> Best regards, Mikl
>>
>>
>> ------------------------------
>> *From:* Dimitrios Katsaros [via GStreamer-devel] <ml-node+[hidden email]
>> <http:///user/SendEmail.jtp?type=node&node=4681805&i=0>>
>> *Sent:* Thursday, February 9, 2017 4:27:01 PM
>> *To:* Michael Yarochkin
>> *Subject:* Re: Video duration
>>
>> Well I hope you are not killing people, that doesn't help you get answers!
>>
>> I would guess that the reason you didn't get an answer is that no one
>> happened to see the question.
>> People have jobs and a life and there are a lot of questions posted daily
>> on the mailing list and irc, We
>> can't answer everything!
>>
>> As for your question, part of the reason that you are getting no replies
>> is that you are asking something very generic
>> that can be attributed to any number of reasons. What kind of pipeline
>> are you using? What kind of pipeline are
>> you using to record the file?
>>
>> Dimitrios
>>
>>
>> On Thu, Feb 9, 2017 at 9:39 AM, Mikl <[hidden email]
>> <http:///user/SendEmail.jtp?type=node&node=4681786&i=0>> wrote:
>>
>>> Hello, Readers
>>>
>>> Can you inform me, please, who i need to kill, to attract attention to my
>>> question?
>>> Thank you.
>>>
>>> http://gstreamer-devel.966125.n4.nabble.com/Wrong-file-durat
>>> ion-td4681702.html
>>>
>>> Mikl
>>>
>>>
>>>
>>> --
>>> View this message in context: http://gstreamer-devel.966125.
>>> n4.nabble.com/Video-duration-tp4681778.html
>>> Sent from the GStreamer-devel mailing list archive at Nabble.com.
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> [hidden email] <http:///user/SendEmail.jtp?type=node&node=4681786&i=1>
>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>
>>
>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> [hidden email] <http:///user/SendEmail.jtp?type=node&node=4681786&i=2>
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>>
>> ------------------------------
>> If you reply to this email, your message will be added to the discussion
>> below:
>> http://gstreamer-devel.966125.n4.nabble.com/Video-duration-t
>> p4681778p4681786.html
>> To unsubscribe from Video duration, click here.
>> NAML
>> <http://gstreamer-devel.966125.n4.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml>
>>
>> ------------------------------
>> View this message in context: Re: Video duration
>> <http://gstreamer-devel.966125.n4.nabble.com/Video-duration-tp4681778p4681805.html>
>>
>> Sent from the GStreamer-devel mailing list archive
>> <http://gstreamer-devel.966125.n4.nabble.com/> at Nabble.com.
>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>>
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20170210/1c10485e/attachment-0001.html>