Re: Can't get kino or dvgrab to work

Looks like our problems were a little bit different since 1, you're not
using a tape, and 2, for me, dvgrab stops early without saying that the
capture stops. Either way, the -noavc option did work (which is strange
because i'm positive that's one of the first things i tried), but anyways,
not i have a new problem. dvgrab is splitting the files when they get to
1gb. I read that dvgrab shouldn't do that when capturing to raw, but man
dvgrab says that raw is default anyways. If i set the -format option to raw,
it still creates .dv files and splits them at 1gb. Any advice for this?

On Tue, Oct 20, 2009 at 14:28, Stefan Richter <[email protected]>wrote:

> On 20 Oct, Dan Dennedy wrote:
> > On Tue, Oct 20, 2009 at 12:30 AM, Stefan Richter
> > <[email protected]> wrote:
> >> Danny Piccirillo wrote:
> >>> I've been trying to capture video from my DV camera but Kino freezes
> every
> >>> time i try (using Ubuntu Karmic by the way), and dvgrab won't grab more
> than
> >>> the first few seconds. dvgrab has at least made some progress and
> captured a
> >>> little bit, but for some reason it stops early.
> >>
> >> dvgrab stops early for me too (when I tried it the last time), but I can
> >> successfully work around that by means of the -noavc option.
> >
> > Let's focus on dvgrab for now. My suspicion is that dvgrab believes it
> > is at the end of the tape, and -noavc suppresses the ability to detect
> > that. I have not reproduced the problem yet. It could be
> > device-dependent behavior.
>
> Uh, I left an important fact out of my "report":  Lately I used this
> camcorder without a tape inserted, in webcam mode.  (I never ever record
> anything, I got this camcorder for nothing else than driver testing.)
>
> So here is what happens:  Without noavc option, dvgrab exits with a
> message like
>
>        Found AV/C device with GUID 0x008088030960484b
>        Waiting for DV...
>        Capture Started
>        "dvgrab-010.dv":     0.14 MiB 1 frames timecode 00:00:00.00 date
> 2009.10.20 18:54:45
>        Capture Stopped
>
> if I have no tape inserted.  With tape in it, dvgrab captures the
> webcam-mode video stream.  Also, with tape inserted and camcorder in
> play mode, dvgrab starts the tape and records.
>
> Kino is a little bit different:  Always shows the live preview, but
> records only a single frame file
>  - if the camcorder is in webcam mode without tape,
>  - if the camcorder is in webcam mode with tape (i.e. tape inserted,
>    dial switched to "record", motor paused).
> Kino captures only if the dial on the camcorder is switched to play.
>
> And that's the secret why I am somewhat more successful with SBP-2:
> HDDs can be either on or off; there aren't as many buttons on them as on
> a camcorder.  (For testing, I also have got an IIDC camera without any
> buttons at all, which helps.)  #-)
>
> >> Dan had a suggestion for me what I should check in the dvgrab source to
> >> narrow down my problem, but I didn't spend the time to do that yet.
> >
> > There is a big test in the middle of captureThreadRun() in dvgrab.cc
> > around a call to writeFrame(). It would be interesting test for
> > someone who is affected by this bug to comment the if lines and call
> > writeFrame unconditionally to see if it resolves.
>
> Hmm.  I left the three blocks with "buffer underrun...", "damaged
> frame...", and "frame dropped..." intact because these messages were
> never printed, and changed the else block thus:
>
> --- dvgrab-3.5.orig/dvgrab.cc
> +++ dvgrab-3.5/dvgrab.cc
> @@ -1038,27 +1038,7 @@ void DVgrab::captureThreadRun()
>                }
>                else
>                {
> -                       if ( m_hdv )
> -                       {
> -                               writeFrame();
> -                       }
> -                       else
> -                       {
> -                               DVFrame *dvframe = static_cast<DVFrame*>(
> m_frame );
> -                               TimeCode timeCode = { 0, 0, 0, 0 };
> -                               dvframe->GetTimeCode( timeCode );
> -                               if ( dvframe->IsNormalSpeed() &&
> -                                    ( m_jpeg_overwrite ||
> -                                      !m_avc ||
> -                                      !m_isRecordMode ||
> -                                      ( m_isRecordMode &&
> -                                        strcmp( avc1394_vcr_decode_status(
> m_transportStatus ), "Recording" ) == 0 &&
> -                                        !( timeCode.hour == 0 &&
> timeCode.min == 0  && timeCode.sec == 0 && timeCode.frame == 0 )
> -                                      )
> -                                    )
> -                                  )
> -                                       writeFrame();
> -                       }
> +                       writeFrame();
>
>                        // drop frame on stdout if getting low on buffers
>                        if ( !critical_mass && m_raw_pipe )
>
>
> However, this still did not change anything for the situation that the
> camcorder streams live video while no tape is inserted:
>
> $ dvgrab-3.5/dvgrab
> Found AV/C device with GUID 0x008088030960484b
> Waiting for DV...
> Capture Started
> "dvgrab-011.dv":     0.55 MiB 4 frames timecode 00:00:00.00 date 2009.10.20
> 19:13:51
> Capture Stopped
>
> As before, -noavc helps:
>
> $ dvgrab-3.5/dvgrab -noavc
> Found AV/C device with GUID 0x008088030960484b
> Waiting for DV...
> Capture Started
> ^C"dvgrab-012.dv":    32.27 MiB 235 frames timecode 00:00:00.00 date
> 2009.10.20 19:14:07
> Capture Stopped
>
> (I stopped it with Ctrl-C.)
> --
> Stefan Richter
> -=====-==--= =-=- =-=--
> http://arcgraph.de/sr/
>
>


-- 
☮♥Ⓐ - http://www.google.com/profiles/danny.piccirillo

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