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Posted to dev@openmeetings.apache.org by Maxim Solodovnik <so...@gmail.com> on 2013/02/28 03:35:34 UTC

h264 video recording

Hello Sebastian,

Currently I'm trying to switch video codec on client to be H264.
The video works as expected (not sure how quality is changed)
The only problem I currently have related to recording:
While processing recording of type interview we are trying to convert flv
video to the sequence of images using ffmpeg.

this type of conversion is failed.

I did update ffmpeg, x264 and other dependencies to have latest available
version form the git.
ffmpeg was rebuilt with x264 support

but the video made by OM is not convertable

I have tried to make changes on client (playing
with H264VideoStreamSettings options)
but this have minimal or no effect

According to ffmpeg errors:

[h264 @ 0x9c0ce60] no frame!
    Last message repeated 113 times

I guess some info is not written into the stream (SPS PPS)
Maybe you know how stream should be serialized to have this information?

Surprisingly raw flv files (like rec_56_stream_2_27_02_2013_20_19_36.flv)
are played successfully using VLC player on Windows.


Thanks in advance for your help

-- 
WBR
Maxim aka solomax

RE: h264 video recording

Posted by Stephen Cottham <St...@robertbird.com.au>.

Looks good, just running thru the install with it now and will update as I go.

Will need to check the differences for Debian but I'll start with Ubuntu.

Cheers


-----Original Message-----
From: Maxim Solodovnik [mailto:solomax666@gmail.com] 
Sent: 28 February 2013 13:53
To: dev
Cc: Sebastian Wagner
Subject: Re: h264 video recording

@Stephen yes please :) I used
https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide while testing :) it is very detailed.


On Thu, Feb 28, 2013 at 7:40 PM, Stephen Cottham < Stephen.Cottham@robertbird.com.au> wrote:

> Hi Maxim,
>
> Did you want me to include the H264 into the FFMPEG build instructions?
>
> Best Regards
>
>
>
> Stephen Cottham
> Group IT Manager (Associate)
>
> Robert Bird Group
> Level 5, 333 Ann St
> Brisbane, Queensland, 4000, Australia
> Phone: +6173 319 2777 (AUS)
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>
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> -----Original Message-----
> From: Maxim Solodovnik [mailto:solomax666@gmail.com]
> Sent: 28 February 2013 09:54
> To: seba.wagner@gmail.com
> Cc: dev
> Subject: Re: h264 video recording
>
> The issue seems to be resolved
> due to copy/paste parameters of H264 and camera were not in sync.
> After code generalization everything is saved as expected
>
> I'm going to commit my changes
> and ask Stephen Cottham to update his build instructions
>
> Is it OK?
>
>
> On Thu, Feb 28, 2013 at 2:47 PM, seba.wagner@gmail.com < 
> seba.wagner@gmail.com> wrote:
>
> > yeah but if some ffmpeg geek looks at the actual file he might be 
> > also able telling us why :))
> >
> > Have you tried converting the flv to an avi with FFMPEG ? Does that work?
> >
> > Sebastian
> >
> >
> > 2013/2/28 Maxim Solodovnik <so...@gmail.com>
> >
> >> all my searches regarding ffmpeg output end up with: "your file is
> broken"
> >> I'll try to create such report and sample video
> >>
> >>
> >> On Thu, Feb 28, 2013 at 1:20 PM, seba.wagner@gmail.com < 
> >> seba.wagner@gmail.com> wrote:
> >>
> >>> Unfortunately I have no machine for testing and debugging now.
> >>> You might put the recordings up somewhere so that I can grep them 
> >>> as soon as I can test it.
> >>>
> >>> But it would make sense to documentate the issue together with the 
> >>> ffmpeg command and write an email to the FFMPEG list.
> >>>
> >>> Sebastian
> >>>
> >>>
> >>> 2013/2/28 Maxim Solodovnik <so...@gmail.com>
> >>>
> >>>> Should I create/send you the recordings?
> >>>>
> >>>>
> >>>> On Thu, Feb 28, 2013 at 12:12 PM, Maxim Solodovnik < 
> >>>> solomax666@gmail.com> wrote:
> >>>>
> >>>>> The command is
> >>>>> ffmpeg -i ../rec_56_stream_2_27_02_2013_20_19_36.flv -vf
> >>>>> scale=320:240 -an frames/ffout%03d.png
> >>>>>
> >>>>> ffmpeg was compiled from the sources using this 
> >>>>> https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide
> >>>>> instruction
> >>>>>
> >>>>> I can send you flv file(s) I have 7 (created with different 
> >>>>> client
> >>>>> settings)
> >>>>>
> >>>>> but the more I'm looking at it the more I believe flv file 
> >>>>> created with our stream writer is broken ...
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> On Thu, Feb 28, 2013 at 12:06 PM, seba.wagner@gmail.com < 
> >>>>> seba.wagner@gmail.com> wrote:
> >>>>>
> >>>>>> Did you trace it down already so that you can post the raw 
> >>>>>> ffmpeg command together with the raw FLV file so we can test 
> >>>>>> this isolated without making any recording?
> >>>>>>
> >>>>>> Sebastian
> >>>>>>
> >>>>>>
> >>>>>> 2013/2/28 Maxim Solodovnik <so...@gmail.com>
> >>>>>>
> >>>>>>> Hello Sebastian,
> >>>>>>>
> >>>>>>> Currently I'm trying to switch video codec on client to be H264.
> >>>>>>> The video works as expected (not sure how quality is changed) 
> >>>>>>> The only problem I currently have related to recording:
> >>>>>>> While processing recording of type interview we are trying to 
> >>>>>>> convert flv video to the sequence of images using ffmpeg.
> >>>>>>>
> >>>>>>> this type of conversion is failed.
> >>>>>>>
> >>>>>>> I did update ffmpeg, x264 and other dependencies to have 
> >>>>>>> latest available version form the git.
> >>>>>>> ffmpeg was rebuilt with x264 support
> >>>>>>>
> >>>>>>> but the video made by OM is not convertable
> >>>>>>>
> >>>>>>> I have tried to make changes on client (playing with 
> >>>>>>> H264VideoStreamSettings options) but this have minimal or no 
> >>>>>>> effect
> >>>>>>>
> >>>>>>> According to ffmpeg errors:
> >>>>>>>
> >>>>>>> [h264 @ 0x9c0ce60] no frame!
> >>>>>>>     Last message repeated 113 times
> >>>>>>>
> >>>>>>> I guess some info is not written into the stream (SPS PPS) 
> >>>>>>> Maybe you know how stream should be serialized to have this 
> >>>>>>> information?
> >>>>>>>
> >>>>>>> Surprisingly raw flv files (like
> >>>>>>> rec_56_stream_2_27_02_2013_20_19_36.flv) are played 
> >>>>>>> successfully using VLC player on Windows.
> >>>>>>>
> >>>>>>>
> >>>>>>> Thanks in advance for your help
> >>>>>>>
> >>>>>>> --
> >>>>>>> WBR
> >>>>>>> Maxim aka solomax
> >>>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> --
> >>>>>> Sebastian Wagner
> >>>>>> https://twitter.com/#!/dead_lock http://www.webbase-design.de 
> >>>>>> http://www.wagner-sebastian.com seba.wagner@gmail.com
> >>>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> WBR
> >>>>> Maxim aka solomax
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> WBR
> >>>> Maxim aka solomax
> >>>>
> >>>
> >>>
> >>>
> >>> --
> >>> Sebastian Wagner
> >>> https://twitter.com/#!/dead_lock
> >>> http://www.webbase-design.de
> >>> http://www.wagner-sebastian.com
> >>> seba.wagner@gmail.com
> >>>
> >>
> >>
> >>
> >> --
> >> WBR
> >> Maxim aka solomax
> >>
> >
> >
> >
> > --
> > Sebastian Wagner
> > https://twitter.com/#!/dead_lock
> > http://www.webbase-design.de
> > http://www.wagner-sebastian.com
> > seba.wagner@gmail.com
> >
>
>
>
> --
> WBR
> Maxim aka solomax
>
> DQo+IC0tDQo+IFNlYmFzdGlhbiBXYWduZXINCj4gaHR0cHM6Ly90d2l0dGVyLmNv
>
> bS8jIS9kZWFkX2xvY2sNCj4gaHR0cDovL3d3dy53ZWJiYXNlLWRlc2lnbi5kZQ0KPiBodH
> RwOi8v
>
> d3d3LndhZ25lci1zZWJhc3RpYW4uY29tDQo+IHNlYmEud2FnbmVyQGdtYWlsLmNvbQ0KPg
> d3d3LndhZ25lci1zZWJhc3RpYW4uY29tDQo+0KDQoN
> Cg0KLS0NCldCUg0KTWF4aW0gYWthIHNvbG9tYXgNCg




--
WBR
Maxim aka solomax