AW: AW: RTP H264 encoding problem - bad files duration

[Thornton, Keith]

I tried Tim’s pipeline on windows-7 64 bit and it works fine for me with vlc 2.1.5 Rincewind.

Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Julio
Gesendet: Montag, 21. September 2015 23:00
An: gstreamer-devel at lists.freedesktop.org
Betreff: Re: AW: RTP H264 encoding problem - bad files duration

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<file:///C:\Users\x51085fr\Videos\videossss-000.mp4>
Done discovering file:///C://Users//x51085fr//Videos//videossss-000.mp4<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<file:///C:\Users\x51085fr\Videos\videossss-001.mp4>
Done discovering file:///C://Users//x51085fr//Videos//videossss-001.mp4<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<file:///C:\Users\x51085fr\Videos\videossss-002.mp4>
Done discovering file:///C://Users//x51085fr//Videos//videossss-002.mp4<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 ... [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] <[hidden email]</user/SendEmail.jtp?type=node&node=4673763&i=0>>:
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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