[gst-devel] Slight audio/video sync problem - any suggestions?

[Mark Nauwelaerts]

Well, I know :) , "stamp" never has been.  That is, it is not part of a usual
distro GStreamer installation (involving core, gst-plugins-good, etc).
However, it is part of the gst-entrans collection also found at the given
sourceforge URL (which would then require download, compiling, etc).
You might do a temporary proof-of-concept (sort of) test instead that forces a
copy using:
- efence; pretty abusive and hits memory a bit
- a combination of 2 x videocrop (adding and dropping a mock border)
- some other creative combination ...

However, neither of these has any of stamp's "fancy sync features" (if that's
what you refer to), which is why it was made ...

Regards,
Mark.

Jason L. Buberel wrote:
> Ack - that feels SOO CLOSE to what I need. Unfortunately, the element
> being discussed - 'stamp' - no longer appears to be part of gstreamer v0.10:
> 
> WARNING: erroneous pipeline: no element "stamp"
> 
> And sure enough 'gst-inspect' does not include any reference to a
> 'stamp' element either.
> 
> I shall keep digging!
> 
> -jason
> 
> Mark Nauwelaerts wrote:
>> This could be another example of what is mentioned in the Note at the end of
>> section
>> http://gentrans.sourceforge.net/docs/head/manual/html/howto.html#sect-recording
>> (observe that introducing a queue actually entails a "separate thread", as it is
>> mentioned in this context).
>>
>> In itself, that may not provide more of an explanation :-(,
>> but may give some ideas/inspiration to variations/alternatives.
>>
>> Regards,
>> Mark.
>>
>> Jason L. Buberel wrote:
>>   
>>> Oddly enough, that makes things worse :(
>>>
>>> Here is what I have confirmed - the following command will result in a
>>> VERY clear high quality audio-only recording on my configuration:
>>>
>>>     
>>>> gst-launch-0.10 alsasrc device="hw:1,0" !
>>>>       
>>> audio/x-raw-int,rate=16000,channels=1,depth=16 ! audioconvert !
>>> vorbisenc ! oggmux ! filesink location=audio-only.ogg
>>>
>>> Which you can hear:
>>>
>>> http://www.buberel.org/audio-only.ogg
>>>
>>> But when I use Nei's command below, which has essentially the same audio
>>> parameters but with the additional 'queue' element to record audio and
>>> video, I see many of the following error messages:
>>>
>>> WARNING: from element /pipeline0/alsasrc0: Can't record audio fast enough
>>> Additional debug info:
>>> gstbaseaudiosrc.c(603): gst_base_audio_src_create (): /pipeline0/alsasrc0:
>>> dropped 13600 samples
>>> WARNING: from element /pipeline0/alsasrc0: Can't record audio fast enough
>>> Additional debug info:
>>> gstbaseaudiosrc.c(603): gst_base_audio_src_create (): /pipeline0/alsasrc0:
>>> dropped 12000 samples
>>> WARNING: from element /pipeline0/alsasrc0: Can't record audio fast enough
>>> Additional debug info:
>>>
>>> I am going to work on an ascii-art diagram of this pipeline in the hopes
>>> that it will help others see the mistake I am making.
>>>
>>> -jason
>>>
>>>
>>> Nie Jun wrote:
>>>     
>>>> gst-launch-0.10 v4l2src ! queue ! videorate !
>>>> video/x-raw-yuv,width=800,height=600,framerate=15/1  !
>>>> ffmpegcolorspace ! theoraenc ! queue ! oggmux name=mux alsasrc
>>>> device="hw:1,0"  ! audiorate !
>>>> audio/x-raw-int,rate=16000,channels=1,depth=16 ! queue ! audioconvert
>>>> ! vorbisenc ! QUEUE ! mux. mux. ! queue ! filesink sync=true
>>>> location=test.ogg
>>>>
>>>> hope it helps you.
>>>>   
>>>>       
>>> ------------------------------------------------------------------------
>>>
>>> -------------------------------------------------------------------------
>>> This SF.net email is sponsored by: Microsoft
>>> Defy all challenges. Microsoft(R) Visual Studio 2008.
>>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> gstreamer-devel at lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>     
> 
> ------------------------------------------------------------------------
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel