[vlc] can't transcode and display

[gonzague]

Hi, It is happening sometime that ffmpeg is not fully effective.
To know the muxers you can use, type "ffpmeg -formats" , and check the 
1rst letters ( E=encode, D=decode, A=audio, V=video)
Same things to know the codecs you can use , typing "ffpmeg -codecs".
Check compatybility for sout on 
http://www.videolan.org/streaming-features.html
chears
3o3


On 24/06/2011 23:08, Angus McMorland wrote:
> Hi all,
>
> I'm trying to achieve something that I think should be relatively
> simple: capturing from a webcam, transcoding to a compressed movie
> file, and displaying on the screen. I can get the transcoding or the
> display to work independently, but not together. I can also achieve
> displaying and saving, without transcoding, into a .avi muxer.
>
> I'm calling vlc with the following script:
>
> SESSION=quack
> SAVEDIR=/tmp
> VIDEV=v4l2:///dev/video0
>
> DST_DSP=display{noaudio}
> #DST_MP4=transcode{vcodec=mp4v,scale=1,vb=2048,vt=80000,size=1920x1080,fps=25}:standard{mux=mp4,access=file,dst=${SAVEDIR}/${SESSION}.mp4,noaudio}
> DST_MP4=transcode{vcodec=mp4v}:standard{mux=mp4,access=file,dst=${SAVEDIR}/${SESSION}.mp4,noaudio}
> DST_AVI=std{mux=avi,access=file,dst=${SAVEDIR}/${SESSION}.avi}
>
> #SOUT='#duplicate{dst="'${DST_AVI}'"}'  # config 1
> #SOUT='#duplicate{dst="'${DST_MP4}'"}' # config 2
> #SOUT='#duplicate{dst="'${DST_DSP}'",dst="'${DST_MP4}'"}' # config 3
> SOUT='#duplicate{dst="'${DST_DSP}'",dst="'${DST_AVI}'"}' # config 4
>
> vlc -vvv --one-instance ${VIDEV} --v4l-caching 1024 --sout=${SOUT}
> --no-sout-audio&
>
> where using the SOUT lines for configs 1, 2 and 4 work as expected,
> but the one I want, config 3, doesn't. Instead, it creates the .mp4
> file, but doesn't write into it, and error messages are printed to
> stdout like:
>
> [0x12a58a0] stream_out_transcode stream out debug: late picture skipped (1017)
>
> I'm running a x86_64 quad core 2.7 GHz Intel machine with 8 GB of RAM,
> so I guess I'll be surprised if the hardware just isn't up to it.
> There's no appreciable CPU load when I'm trying any of these config
> modes.
>
> Please can anyone tell me what I'm doing wrong?
>
> Thanks,
>
> Angus