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I have closed the forums to new postings because there was not enough discussion, I answered nearly all the questions, and I no longer work on Kino. Please use the forums provided by your Linux distribution. Meanwhile, I will leave this open in read-only mode to serve as a knowledge base.


Subject: "dvgrab on opensuse 11.0" Previous topic | Next topic
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Top Linux Digital Video dvgrab Topic #1090
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hdlbqFri Sep-11-09 09:41 AM
Member since Sep 11th 2009
2 posts
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#1090, "dvgrab on opensuse 11.0"
Edited on Fri Sep-11-09 09:44 AM by hdlbq

          

hello,

I'm french and apologize for my english.

I have the following problem, and will be very grateful for every hep from a dvgrab guru.

I have recorded the birth of my second son on a mini DV tape, with other less important things.

For many years, I'm unable to read this tape, with the following symptoms, according to the camcorder i use to read it, either a canon or a jvc. But i still try to read it again

- the canon begins to display normally the contents, then the screen turns to blue, (as for a blank tape), but the timecode still runs (that is not the case for an erased/blank/overwritten tape).
- on the JVC, the begin is the same, but, near the start of the bad section, the camcorder says that the format is a foreign one, and the last picture remains displayed, but "sautillant".

My idea was to use dvgrab (or another software) to grab the contents of the tape at the lowest level (if the camcorder is able to do that), to save it into a file, and then, with some help from the dv's gurus on internet, to recover some part of the tape.
My first question is: is it possible ?

Unfortunately, after compiling dvgrab on my opensuse 11.0 (I need this distrib since it allows boot from an external firewire drive of my mac), I encounter the following problem:

- I start the play of the tape (the commands of dvgrab in interactive mode, such as play, stop, rewind don't work), and I launch dgrab.
It says:
"Found AV/C device...."
and after some time:
"" 0.00MiB 0 frames
Capture stopped
Error: no DV

More info: dvgrab -i work partially:
while the tape plays, it displays correctly the time code.
I have compiled kino, which works perfectly (either commands or capture), but is unable to capture the "bad part" of the tape, as any apple tool does.

An idea ?

Thanks a lot
Best regards

  

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ddennedySun Sep-13-09 08:15 AM
Member since Jun 26th 2006
1362 posts
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#1091, "RE: dvgrab on opensuse 11.0"
In response to Reply #0


          

dvgrab does some validation of the DV data and will prevent capturing some of it. If you can compile code from source tarball, then you should compile libiec61883. You will not need to install it, but you might need a libraw1394-devel package to compile it. Then, there is an examples directory with a test-dv program. You must manually press play on the camera as this is a very simple program. It will output raw DV to stdout so redirect it to a file:

examples/test-dv > test.dv

Just press ctrl+c when done and press stop on the camcorder. Then, you can try to play it with ffplay command line player from FFmpeg project and see what you get - unfortunately, probably not much.

+-DRD-+
Lead Kino Developer

  

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hdlbqMon Sep-14-09 08:15 AM
Member since Sep 11th 2009
2 posts
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#1092, "RE: dvgrab on opensuse 11.0"
In response to Reply #1


          

Hello,

Thanks for your help.
Actually, due to the fact that I use a powerpc platform, I have to start from a source tarball.

I will try to compile libiec61883, instead of installing the rpm from opensuse as i do. And thanks a lot for your tip about test-dv.

To be more precise in my symptoms, I have to say that the grabdv misfunctionning I have described occurs also for very normal and readable tapes. So, It seems to be unrelated to my specific "bad tape" problem.

By reading older posts, it seems that I'm not the first that encounter such problems, but the tips given to previous posts (such as changing cables, or camcorder) are not relevant in my case: I have ried with the two camcorder I have, with the same result.
Bests regards

  

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