[FFmpeg-soc] mxfenc.c version 0.0.3

[Reimar Döffinger]

On Sat, Jul 26, 2008 at 08:48:57PM +0800, zhentan feng wrote:
> 2008/7/26 zhentan feng <spyfeng at gmail.com>
> 
> > Hi
> >
> > 2008/7/25 Michael Niedermayer <michaelni at gmx.at>
> >
> >> On Fri, Jul 25, 2008 at 09:19:11AM +0800, zhentan feng wrote:
> >> > Hi,
> >> >
> >> > 2008/7/25 Michael Niedermayer <michaelni at gmx.at>:
> >> >
> >> > > On Fri, Jul 25, 2008 at 01:44:47AM +0800, zhentan feng wrote:
> >> > > > Hi, all
> >> > > > I have fixed many bugs in mxfenc.c. Now it seems stucked at final
> >> step.
> >> > > > run test case as below:
> >> > > > 1)./output_example test.mpg
> >> > > > 2)./ffmpeg -i test.mpg test.mxf
> >> > > > 3)./ffmpeg -i  test.mxf test.avi
> >> > > > stdout says:
> >> > > > picture size invalid (0x0)
> >> > > > Cannot allocate temp picture, check pix fmt
> >> > >
> >> > > I think you should paste the whole output of these ffmpeg commands
> >> here.
> >> [...]
> >> > Input #0, mxf, from 'test.mxf':
> >> >   Duration: N/A, start: 0.000000, bitrate: N/A
> >>
> >> >     Stream #0.0, 1/25: Video: 0x0000, 25.00 tb(r)
> >> >     Stream #0.1, 1/44100: Audio: 0x0000
> >>
> >> looks like it has no clue about which codec it is.
> >>
> >> are you storing that? if yes why does the demuxer not read it correctly?
> >>
> >
> >
> sorry for the misoperation to send the last email. I write it here again:
> 
> descriptor for mxf file is optional, I didn't write the descriptor, so the
> width and height are zero as default.
> Is it possible this reason of picture size invalid?

The thing is that FFmpeg does not know which _codec_ was used, and I
find it rather hard to imagine that that is optional, because e.g. raw
RGB and raw BGR are impossible to distinguish without some identifier.