[AG-DEV] Transcoding DVTS streams?

[Andrew Ford]

Hi,

To clarify, like others said, ffmpeg can decode the DV codec in general (ie,
you can plug a camera in and view it) but it apparently can't depacketize
DVTS, since when you try to receive a DVTS stream it just looks like noise.
VLC can do neither as far as I can tell.

Piers - thanks for the info, I'll give gstreamer a try.

Andrew - what are you using as the backend for this transcoding tool? Is it
all custom-written or do you rely on libraries like ffmpeg?

--Andrew

2009/11/25 Piers O'Hanlon <p.ohanlon at cs.ucl.ac.uk>

> Hi Andrew,
>
> Another way you could probably knock something up quickly is using
> gstreamer - v0.10 contains a DV de/payloader:
>
> %gst-inspect-0.10 | grep "dv:"
> typefindfunctions: video/x-dv: dif, dv
> dv:  dvdemux: DV system stream demuxer
> dv:  dvdec: DV video decoder
> ffmpeg:  ffdemux_dv: FFmpeg DV video format demuxer
> ffmpeg:  ffmux_dv: FFmpeg DV video format muxer
>
> You could play with creating a pipeline using gst-launch-0.10 to do
> what you want or you can write a small app in Python or C++ using the
> gstreamer libraries.
>
> Piers
>
> 2009/11/24 Andrew Ford <andrew.ford at rit.edu>:
> > Hi,
> >
> > Has anyone attempted or found a way to transcode a DVTS stream directly
> off
> > of receiving it via multicast? My goal is to be able to transcode DVTS
> > streams to different formats and resend them as Access Grid-based or
> > web-based streams. So far, it looks like the only way to do it would be
> to
> > modify xdvshow or one of the other DVTS apps to hook together with ffmpeg
> > for transcoding & ffserver for streaming, since as far as I can tell,
> apps
> > like ffmpeg or VLC can't receive DVTS by themselves. Before I go spending
> a
> > bunch of time on that I want to make sure this hasn't already been done
> some
> > other way.
> >
> > Thanks,
> > --Andrew
> >
>
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