Thank you very much Dan,
Incidentally, I've been heavily using the command line in Slackware for
a third of my life. I'm a big fan of kinodv, it was simple, straight
forward, and I could get done what I wanted.
I've tried various newer video editors over the years since then,
sometimes able to get them to work and sometimes not. The best I tried
so far was kdenlive, and it worked the previous couple of installs, but
I was unable to get it to build last week and eventually died a
dependency hell death with some cryptic error and I gave up.
I don't do anything fancy with videos, I just like to excerpt out the
interesting parts and line up several smaller clips end to end, etc.
I've always been frustrated that there wasn't a simple tool with low
dependencies that'd allow me to do simple video editing at the command
line - I just want to do simple stuff, so it was frustrating when I'd
spend all day chasing dependencies finally to end at one I could not
solve, and still not have a working solution.
Why not something like vi but for videos? something simple with low user
interface dependencies?
Then I found out about mlt and that is why I was so excited to see that
it had melt with it!!
As you may know, slackware does not have a stale version of 98% of all
packages available and prebuilt. To a large degree, if I want something,
I need to compile it and all its dependencies, which I don't mind, but
it is bothersome spending days grinding through dependencies only to end
at a cryptic gcc error --- all for a fancy user interface I don't even
want or need.
Anyway, thank you very much for your suggestions - because of them I
determined that PKG_CONFIG_PATH did not include the folder where the
ffmpeg install was putting it's .pc file, and that's why mlt was
skipping libavformat.
So I set the PKG_CONFIG_PATH variable and now it's finding it, and
trying to use it, but bailing with:
//usr/lib64/gcc/x86_64-slackware-linux/5.3.0/../../../../x86_64-slackware-linux/bin/ld:
/usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32 against
`.rodata.str1.1' can not be used when making a shared object; recompile
with -fPIC/
The only reason I was manually specifying --avformat-shared was because
it was the only I could think to try at the time, since nothing else I
tried was working.
Thank you very much!
Jesse Gordon
On 09/30/2016 09:01 PM, Dan Dennedy wrote:
MLT is primarily a development framework. You are strongly encouraged
to use a GUI app provided by your Linux distro such as Flowblade or
Kdenlive. If you decide to continue with your own build, you should
let pkg-config do the work of letting MLT configure find the FFmpeg
libs instead of using --avformat-shared. If you do not know what
pkg-config is, then go learn about it and the PKG_CONFIG_PATH
environment variable. If you get through that, then "melt -query
producers" will list the MLT plugins that can read files or synthesize
video (ala color). Look for "avformat". Hope that helps.
On Fri, Sep 30, 2016 at 8:51 PM Jesse Gordon <tojes...@gmail.com
<mailto:tojes...@gmail.com>> wrote:
Oh blah, I meant to say that the jpeg file /displays/ fine, not
that it displaces. Sorry.
~Jesse
On 09/30/2016 08:50 PM, Jesse Gordon wrote:
Some further info, and two specific questions:
I tried playing a .jpeg file and that displaces.
I can also specify color:red out=25 videofile.mpeg color:green
and it plays the red and green fine but not the mpeg (Or any
other video file I've tried so far.)
I also tried a full path to my mpeg file, and also tried
specifying /melt avformat:/somewhere/here/videofile.mpeg/
None worked.
Question: Is there a command I can type to see if mlt is supposed
to be using ffmpeg to handle video files?
Also, am I correct in my understanding that ffmpeg provides the
video codec support to mlt for a wide range of common video formats?
Thank you very much,
Jesse
On 09/29/2016 08:03 PM, Jesse Gordon wrote:
Good day,
I am very excited to read about mlt/melt, and and am trying to
install and use it, but may be having some user error.
My understanding is that I should be able to play common video
files with /melt videofile.mpeg/
Unfortunately, it won't work - it just gives usage.
I did compile and install ffmpeg and it works and can play my
video files.
mlt does compile just fine, and I tried compiling it with the
following options one at a time, but it never will play my video
files.:
|./configure --enable-gpl3 --enable-gpl
--avformat-shared=/big/src/ffmpeg/libavformat/ ./configure
--enable-gpl3 --enable-gpl ./configure|
(Followed by /&& make && make install/ of course)
However, /melt color:green/ plays a green box no problem, and I
can mix and cross fade between different colors and all that.
I'm using the latest slackware 14.2 64 bit for operating system,
I would be most grateful for any clues on what I might be doing
wrong and how to fix.
Thank you and have a great day,
Jesse
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