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

[Jason L. Buberel]

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.
>>>   
>>>       
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