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List:       mjpeg-users
Subject:    Re: [Mjpeg-users] lavplay does not work - your answer in mjpegusers mailing list
From:       Bernhard Praschinger <shadowlord () utanet ! at>
Date:       2016-11-06 13:58:11
Message-ID: 581F36F3.3080003 () utanet ! at
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Hallo

> It has been a few years since I last used the mailing list.
Answering to the Mailinglist is easy, just replay. And it will be 
forwared to the list.

> I have an older desktop computer that originally had a Fedora-3
> installation on it. I use this computer to learn and play with
> Linux/Unix/c. Over the years I installed video related software on it
> from source, compiled by myself. This included mjpegtools, mplayer, xine
> and cinelerra. I converted short home videos taken with an equally old
> 8mm camera using bttv capture card, analogue input. So my system seemed
> to work. However, over the years my customized system became too
> convoluted and started to fall apart. This happened partly because of my
> inadequate expertise. "I knew enough to be dangerous". So almost a year
> ago I decided to clean up the mess.
You mention there that you use a bttv based card. Which means that you 
can't do a hardware or on card playback.

> I restored the system to its original fc-3 installation using original
> fc-3 rpms (final updates for that distribution). This is similar to
> restoring a 1965 Mercedes car to its original factory condition. The
> only difference to the fc-3 system is the kernel which is now 2.6.32.71
> (I needed it for my Atheros wireless card) and gcc4.2.1. Following
> restoration I started to reinstall video related software, again
> compiling them from sources. So I compiled xine, lame, xatw and
> mjpegtools. Later on I compiled faac, x264, faad, ffmped and dvdauthor.
I have a idea about the painful work.

> I'm able to capture with streamer mjpeg encoding avi, but would like to
> edit the video file with your glav (cinelerra is too complicated, glav
> is fine for my need). This is when I ran into the problem, posting my
> initial message to mjpegtools mailing list.
>
> Now my answers to your questions and ideas:
>
> Yes, it worked before.
>
> I recompiled the same (yes, old version of ,mjpegtools) version that
> worked before on my "bastardized" system.
>
> -p S is not available, because when I configured it the message was no
> software encoding - which by the way I  do not understand.

> -U or -a 0 makes no difference.
So the problem is only related to the video playback.

> The problem is always when the program gets to the video part of the avi
> it tries to open some buffers and then it fails - as I posted the error
> message on my original message.
>
> Could it be because I did not compile libquicktime?
>
> Am I missing some dependencies - lack of software encoding for playback?
That is quite likely. libquicktime should not bee the problem.

I'm not sure about the older mjpegtools version's. It should check for 
libjpeg, and you should see a similar output when you run configure:
checking for jpeg_start_compress in -ljpeg... yes

When it does not find the libjpeg, you usually need to install the 
header or devel rpm and it should find the libjpeg than.

If you know that you have the libjpeg and the developer package 
installed, and configure does not find it, you might "tune" the 
configure script.

So please post the output of configure.

when you run configure you should see: the final lines something like:
configure:   - software MJPEG playback       : true
When you compile the mjpegtools than you should have software playback.

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: shadowlord@utanet.at
www: http://www.lysator.liu.se/~gz/bernhard

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