[streaming] Re: Problem transcoding H264 to MPEG-2

[Marshall Eubanks]

It is possible that this is a problem with the Quicktime encoding /  
hinting. If so,
now would be a good time in the QT upgrade cycle for someone to  
unearth it.

Regards
Marshall

On Feb 22, 2007, at 4:45 PM, Julian Allen wrote:

> Did anyone get a chance to look at the logs I posted?  I was hoping  
> someone with experience of transcoding H264 streams could tell me  
> what I'm doing wrong.
>
> =Julian=
>
> Julian Allen <julian at ubusys.com> wrote: Hi Jean-Paul,
>
> Thanks for your reply. I have posted (pasted?) 3 logs:
>
> http://paste.videolan.org/1372 - this is the output from just  
> playing the stream (successfully).
> http://paste.videolan.org/1373 - this the output from transcoding  
> the stream from H264 to MPEG-2.
> http://paste.videolan.org/1374 - this the output from trying to  
> play the resultant mpeg file.
>
> Cheers,
>
> =Julian=
>
>
> Jean-Paul Saman <jean-paul.saman at planet.nl> wrote: Julian Allen wrote:
> > Hi,
> >
> > I'm trying to transcode some H264 streams to MPEG-2 format files.  
> These streams play fine with VLC 0.8.6 but when I try to transcode  
> them, the resultant file has audio but no video
> >
> > The VLC command line I'm using works for most network streams (of  
> various different formats) but not these particular AFTV ones. So  
> I'm thinking there must be something non-standard about the streams  
> that I'm not accounting for.
> >
> > Here's the comand line I'm using:
> >
> > vlc rtsp://video1.multicasttech.com/ 
> AFTVCrimeH264500.sdp :sout=#transcode 
> {vcodec=mp2v,vb=2048,scale=1,acodec=mpga,ab=192,channels=2,audio- 
> sync}:standard{access=file,mux=ps,dst="AFTV Crime.mpg"} --sout- 
> transcode-width 640 --sout-transcode-height=480 --sout-transcode- 
> canvas-width=640 --sout-transcode-canvas-height=480
> >
> > and here's the VLC message that gets logged over and over again  
> during the transcoding process:
> >
> > main warning: trying to send non-dated packet to stream output!
> >
> > I'd be very grateful for any help or suggestions.
> >
> > =Julian=
> >
> > PS - I already raised his on the "vlc" mailing list but got no  
> replies. A friend told me that subscribers to the "streaming"  
> mailing list would be more likely to come up with good suggestions  
> for this problem.
> >
> >
> >
> >
> >
> Could you post the complete VLC logs to paste dot videolan dot org and
> sent an e-mail again with the link to the pasted log?
>
> That would give us developers more information about why things go
> wrong. With the information you have given us so far the only  
> conclusion
> that can be drawn is that the input stream is borked.
>
> Gtz,
> Jean-Paul Saman.
>
>
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