AW: RTP H264 encoding problem - bad files duration

Julio jeloguin at gmail.com
Mon Sep 21 13:59:38 PDT 2015 

Hi Tim.

Tried with the exact pipeline you tell me, and on Windows ( 7 64bit ) I got
the same bad result !!!.

Ten files, each with the duration of 10 plus the previous duration file ...

Here is the discoverer output of the third files:

C:\Users\x51085fr>gst-discoverer-1.0
"C:\\Users\\x51085fr\\Videos\\videossss-000.mp4"
WARNING: no real random source present!
Analyzing file:///C://Users//x51085fr//Videos//videossss-000.mp4
Done discovering file:///C://Users//x51085fr//Videos//videossss-000.mp4

Topology:
  container: Quicktime
    video: H.264 (High Profile)

Properties:
  Duration: 0:00:10.000000000
  Seekable: yes
  Tags:
      datetime: 2015-09-21T20:43:14Z
      container format: ISO MP4/M4A
      video codec: H.264 (High Profile)
      bitrate: 1219906
      language code: en
      encoder: x264
      minimum bitrate: 861600
      maximum bitrate: 861600

C:\Users\x51085fr>gst-discoverer-1.0
"C:\\Users\\x51085fr\\Videos\\videossss-001.mp4"
WARNING: no real random source present!
Analyzing file:///C://Users//x51085fr//Videos//videossss-001.mp4
Done discovering file:///C://Users//x51085fr//Videos//videossss-001.mp4

Topology:
  container: Quicktime
    video: H.264 (High Profile)

Properties:
  Duration: 0:00:20.000000000
  Seekable: yes
  Tags:
      datetime: 2015-09-21T20:43:14Z
      container format: ISO MP4/M4A
      video codec: H.264 (High Profile)
      bitrate: 1258578
      language code: en
      encoder: x264
      minimum bitrate: 1246400
      maximum bitrate: 1246400


C:\Users\x51085fr>gst-discoverer-1.0
"C:\\Users\\x51085fr\\Videos\\videossss-002.mp4"
WARNING: no real random source present!
Analyzing file:///C://Users//x51085fr//Videos//videossss-002.mp4
Done discovering file:///C://Users//x51085fr//Videos//videossss-002.mp4

Topology:
  container: Quicktime
    video: H.264 (High Profile)

Properties:
  Duration: 0:00:30.000000000
  Seekable: yes
  Tags:
      datetime: 2015-09-21T20:43:14Z
      container format: ISO MP4/M4A
      video codec: H.264 (High Profile)
      bitrate: 1260502
      language code: en
      encoder: x264
      minimum bitrate: 1291400
      maximum bitrate: 1291400

And attached is a windows screenshot with all the files and duration
... [image:
Imágenes integradas 1]


I´m using gstreamer  Version: 1.5.1.0 32bit....

Any idea about what is happening ?

Thanks a lot !!!!



2015-09-21 20:57 GMT+02:00 Tim Müller [via GStreamer-devel] <
ml-node+s966125n4673759h5 at n4.nabble.com>:

> On Mon, 2015-09-21 at 17:53 +0200, Julio Franco wrote:
>
> Hi Julio,
>
> > Tried with splitmuxsink, and the result is the same ... files are
> > generated correctly, but the duration info in the header is wrong ...
> >
> > I mean, if I split video chunks every 10 seconds, the duration of the
> > first chunk is 10, the duration of the second one is 20 ... and so on
> > ... but the size of each chunk is ok.
>
> How are you determining what the duration of each chunk is?
>
> This works fine for me:
>
>  $ gst-launch-1.0 videotestsrc num-buffers=2500 ! video/x
> -raw,framerate=25/1 ! x264enc key-int-max=25 ! splitmuxsink max-size
> -time=10500000000 location=/tmp/video-%03d.mp4
>
>  $ gst-discoverer-1.0 /tmp/video-0* | grep Duration
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>   Duration: 0:00:10.000000000
>
>
> > And, for example if I play the first chunk in VLC, VLC do nothing in
> > the first 10 seconds and begin to show video in the second 11 ...
>
> What VLC version is this with? It works fine for me with:
>
>   VLC media player 2.2.1 Terry Pratchett (Weatherwax) (revision 2.2.1-0
> -ga425c42)
>
>  Cheers
>   -Tim
>
> --
> Tim Müller, Centricular Ltd - http://www.centricular.com
>
> Join us at the GStreamer Conference: 8-9 October 2015 in Dublin, Ireland
>
>
>
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