[FFmpeg-user] Capture Video from Decklink Video Render

[Yugant Khanna]

I just  tried slicing Mjeg while capturing the same through Media express ,
 FFMPEG  throws an exception "Permission Denied"

D:\SOFTWARE\ffmpeg\bin>ffmpeg -ss 20 -t 15 -i
"C:\Users\Developer\Documents\Unti
tled 01.avi" -vcodec copy -acodec copy -y testMjpeg.avi
ffmpeg version N-45279-g1a104bf Copyright (c) 2000-2012 the FFmpeg
developers
  built on Oct 10 2012 19:19:16 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads
--enable-runt
ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r
--enable-libass -
-enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-l
ibfreetype --enable-libgsm --enable-libmp3lame --enable-libnut
--enable-libopenj
peg --enable-librtmp --enable-libschroedinger --enable-libspeex
--enable-libtheo
ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid
--ena
ble-zlib
  libavutil      51. 74.100 / 51. 74.100
  libavcodec     54. 65.100 / 54. 65.100
  libavformat    54. 31.100 / 54. 31.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 19.102 /  3. 19.102
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
C:\Users\Developer\Documents\Untitled 01.avi: Permission denied.

May be i should now try capturing the same video through FFMPEG in MXF
format and then slice it while capturing


On Tue, Dec 11, 2012 at 4:29 AM, Andrew Sinclair <ajsinclair at gmail.com>wrote:

> I know this is an ffmpeg list and I have had Decklink and ffmpeg working
> well but Blackmagic MediaExpress is free and really easy to use, just set
> it to store the raw video in MJPEG and you should be fine importing into
> FCP and I have used it extensively for HD sport etc. I haven't done the
> slicing of the video live but there is no reason you shouldn't be able to
> do it as MJPEG is an intra frame compression.
>
> Note that you also need fast disk and a lot of it for this.
>
> If you get it working let me know as would be interested.
>
>
> On 10 December 2012 23:55, Yugant Khanna <yugant at gmail.com> wrote:
>
> > Hi Carl , if i  take out the mediainfo of the .mov file while its getting
> > captured i see a lot of frame drops. which i will avoid now.
> >
> > Andrew ,  In Stage 1, I simply want to capture from a Decklink for import
> > into FCP .
> > User should be able slice the footage (while its still getting captured)
> > and import the sliced footage into FCP.
> >
> > e.g. I would record the entire football match and while the match is
> still
> > "ON" the user should be able to slice the footage of 1st GOAL and send to
> > FCP.
> >
> > Regards
> > Yugant
> >
> >
> >
> > On Mon, Dec 10, 2012 at 4:29 PM, Andrew Sinclair <ajsinclair at gmail.com
> > >wrote:
> >
> > > You may also want to try a different container type other than MOV for
> > > import into FCP. While I know MOV/Quicktime is best for FCP the people
> > have
> > > reported issues with ffmpeg/Quicktime/FCP combo.
> > >
> > > Do you simply want to capture from a Decklink for import into FCP or do
> > you
> > > want to do something more complex? As you should be able to import/log
> > > directly.
> > >
> > >
> > > On 10 December 2012 21:55, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> > >
> > > > Yugant Khanna <yugant <at> gmail.com> writes:
> > > >
> > > > > frame=  251 fps=246 q=0.0 Lsize=   72472kB time=00:00:10.04
> > > > > bitrate=59132.4kbits/s dup=3 drop=0
> > > >
> > > > You originally wrote:
> > > > > i tried this but their are lot of frame drops
> > > >
> > > > The output above indicates that no frames are dropped,
> > > > could you elaborate?
> > > >
> > > > Carl Eugen
> > > >
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