Re: [Mlt-devel] How can I save a melt server side edited video into a new file?
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Re: [Mlt-devel] How can I save a melt server side edited video into a new file?
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From: Brice V. <br...@ve...> - 2010-03-23 15:20:40
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Ok I have a successful test here!! First, your command line failed: melt colour:red in=0 out=50 -consumer avformat:/home/test/vidred.dv But with a different consumer service (libdv) it works: melt colour:red in=0 out=50 -consumer libdv:/home/test/vidred.dv So I tried what I was seeking for in melt with this command line: melt colour:blue length=500 out=500 -track /home/test/video.dv out=500 length=500 -transition composite always_active=1 geometry="2%,1%:15%x15%" distort=1 -filter channelcopy to=0 from=1 -consumer libdv:/home/test/result.dv And it woorrks !! ... but... files are really too bid (75M for 2 seconds!!). So I need to make the 'avformat' service works. I'm looking for avcodec and avformat unstripped packages, but can they be used in parallel with ffmepg itself without troubles? I ask the question because I've installed ffmpeg and I need it to keep working well separately from MLT framework. Thank you so much for your precious help! Le 22 mars 2010 à 20:43, Dan Dennedy a écrit : > On Mon, Mar 22, 2010 at 9:11 AM, Brice Vercoustre <br...@ve...> wrote: >> The /home/test directory has max righs 0777.... >> >> The odd thing is that melt seems to be unable to start processing the video. It stays on 0 position. >> >> But when I enter 'l" on my keyboard, I go on the next frame with success. melt goes from 0 to the last frame of the video (correctly calculated my melt). But still do not generates an output video. >> >> I even tried: >> >> melt colour:red in=0 out=50 -consumer avformat:/home/test/vidred.mpg s=320x240 >> >> ... but same result: melt is launched, it stays on 0 position, and no file is generated! > > That is strange. I can not reproduce it. I do not recall ever seeing a > problem like this, and I do not recall anyone else reporting a problem > like this. The more interesting thing is that the ell key is supposed > to pause the video, not make it run! Perhaps for the reason it is not > able to create a video is the reason it behaves this way. Maybe > because .'mpg' tells ffmpeg libs to use codecs which are not available > in your build of libavcodec and libavformat. Try instead: > > melt colour:red in=0 out=50 -consumer avformat:/home/test/vidred.dv > > (do not add s= because DV does not accept arbitrary resolution). > > If it works, look for "unstripped" versions of libavcodec and > libavformat packages. > >> I spend the whole week looking for a solution. When I finally find it, I can't even make it work :( >> So frustrating! >> >> >> >> Le 22 mars 2010 à 16:50, Rob Canning a écrit : >> >>> Brice Vercoustre said : >>>> Ok the problem is that melt launch correctly, but the "Current Postiion" stays at 0, and any testme.avi never comes. >>>> >>>> melt /home/test/video.dv -filter greyscale -consumer avformat:testme.mpeg >>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>> |1=-10| |2= -5| |3= -2| |4= -1| |5= 0| |6= 1| |7= 2| |8= 5| |9= 10| >>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>> +---------------------------------------------------------------------+ >>>> | H = back 1 minute, L = forward 1 minute | >>>> | h = previous frame, l = next frame | >>>> | g = start of clip, j = next clip, k = previous clip | >>>> | 0 = restart, q = quit, space = play | >>>> +---------------------------------------------------------------------+ >>>> Current Position: 0 >>>> >>>> (And then nothing happen until I enter "q" for example) >>>> (no testme.mpeg in /home/test/ directory) >>> >>> >>>> >>>> >>>> Do you think I can have a problem with my MLT install on my Ubuntu server? >>> >>> no clue i am afraid - you have permissions to write to /home/test ? >>> rob >>> >>>> >>>> Best Regards, >>>> Brice Vercoustre >>>> >>>> >>>> Le 22 mars 2010 à 16:01, Rob Canning a écrit : >>>> >>>>> Brice Vercoustre said : >>>>>> Hi Rob, >>>>>> >>>>>> Thank you for your help! >>>>>> >>>>>> I tried your commend (the one at the bottom of this mail) and I still get the same screen: >>>>>> >>>>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>>>> |1=-10| |2= -5| |3= -2| |4= -1| |5= 0| |6= 1| |7= 2| |8= 5| |9= 10| >>>>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>>>> +---------------------------------------------------------------------+ >>>>>> | H = back 1 minute, L = forward 1 minute | >>>>>> | h = previous frame, l = next frame | >>>>>> | g = start of clip, j = next clip, k = previous clip | >>>>>> | 0 = restart, q = quit, space = play | >>>>>> +---------------------------------------------------------------------+ >>>>>> Current Position: 0 >>>>>> >>>>>> On this screen I have to be behind my computer and press "l" or "space" or whatever makes melt run... And that's the point: how can I launch the command line from a script (.sh or php) SERVER SIDE so that melt can work alone and treat the video. In other words, how can I make it work automatically? >>>>> >>>>> no you dont - for example >>>>> >>>>> melt videos/theapple.avi -filter greyscale -consumer avformat:testme.mpeg >>>>> [mpeg1video @ 0x8857d60]interlacing not supported by codec >>>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>>> |1=-10| |2= -5| |3= -2| |4= -1| |5= 0| |6= 1| |7= 2| |8= 5| |9= 10| >>>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>>> +---------------------------------------------------------------------+ >>>>> | H = back 1 minute, L = forward 1 minute | >>>>> | h = previous frame, l = next frame | >>>>> | g = start of clip, j = next clip, k = previous clip | >>>>> | 0 = restart, q = quit, space = play | >>>>> +---------------------------------------------------------------------+ >>>>> Current Position: 824 >>>>> >>>>> this will start doing its job without any user interaction. >>>>> >>>>> >>>>>> At the end, where can I found the testme.avi video to publish it for my students? >>>>> >>>>> where you run the script from. >>>>> >>>>> or like this: >>>>> melt videos/theapple.avi -filter greyscale -consumer avformat:/home/me/path/to/some/dir/testme.mpeg >>>>> >>>>>> >>>>>> Thank you so much ;-) >>>>>> >>>>>> Best Regards, >>>>>> Brice Vercoustre >>>>>> >>>>>> Le 22 mars 2010 à 14:12, Rob Canning a écrit : >>>>>> >>>>>>> Brice Vercoustre said : >>>>>>>> Hi all, >>>>>>>> >>>>>>>> I'm currently searching for a server side solution that would be able to handle picture-in-picture processing (insert a video thumbnail into another video). >>>>>>>> >>>>>>>> The purpose of that is to generate educational videos of university courses with a mix of both the teacher's screencast (main video) and it's face (thumbnail video). >>>>>>>> >>>>>>>> I'm looking for a command line app that would let me create such a video. The melt app really seems to do that, but I'm not sure I understood the mechanism well. With my terminal, I've been able to launch melt to do some editing on a video such as: >>>>>>>> >>>>>>>> melt a.dv -filter greyscale in=0 out=50 >>>>>>>> >>>>>>>> Melt is launched at the 0 frame, I can go from frame to frame... Here is the result: >>>>>>>> >>>>>>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>>>>>> |1=-10| |2= -5| |3= -2| |4= -1| |5= 0| |6= 1| |7= 2| |8= 5| |9= 10| >>>>>>>> +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ >>>>>>>> +---------------------------------------------------------------------+ >>>>>>>> | H = back 1 minute, L = forward 1 minute | >>>>>>>> | h = previous frame, l = next frame | >>>>>>>> | g = start of clip, j = next clip, k = previous clip | >>>>>>>> | 0 = restart, q = quit, space = play | >>>>>>>> +---------------------------------------------------------------------+ >>>>>>>> Current Position: 0 >>>>>>>> >>>>>>>> >>>>>>>> But I really do not get how I can export the result into a new video. I did not understood the -consumer logic, and how can I exploit it to save the result into a new video. >>>>>>> >>>>>>> for example this: >>>>>>> >>>>>>> melt a.dv -filter greyscale -consumer libdv:testme.dv >>>>>>> melt a.dv -filter greyscale -consumer avformat:testme.avi >>>>>>> >>>>>>> hth >>>>>>> >>>>>>> rob >>>>>>> >>>>>>> >>>>>>>> >>>>>>>> If I understand that part well, I'm sure I'll find how to make some picture-in-picture processing. >>>>>>>> >>>>>>>> Thank you for helping me on this! >>>>>>>> >>>>>>>> Best Regards, >>>>>>>> Brice Vercoustre. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> ------------------------------------------------------------------------------ >>>>>>>> Download Intel® Parallel Studio Eval >>>>>>>> Try the new software tools for yourself. Speed compiling, find bugs >>>>>>>> proactively, and fine-tune applications for parallel performance. >>>>>>>> See why Intel Parallel Studio got high marks during beta. >>>>>>>> http://p.sf.net/sfu/intel-sw-dev >>>>>>>> _______________________________________________ >>>>>>>> Mlt-devel mailing list >>>>>>>> Mlt...@li... >>>>>>>> https://lists.sourceforge.net/lists/listinfo/mlt-devel >>>>>>>> >>>>>>> -------------- >>>>>>> ro...@go... >>>>>>> rob.goto10.org >>>>>>> -------------- >>>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> Download Intel® Parallel Studio Eval >>>>>> Try the new software tools for yourself. Speed compiling, find bugs >>>>>> proactively, and fine-tune applications for parallel performance. >>>>>> See why Intel Parallel Studio got high marks during beta. >>>>>> http://p.sf.net/sfu/intel-sw-dev >>>>>> _______________________________________________ >>>>>> Mlt-devel mailing list >>>>>> Mlt...@li... >>>>>> https://lists.sourceforge.net/lists/listinfo/mlt-devel >>>>>> >>>>> -------------- >>>>> ro...@go... >>>>> rob.goto10.org >>>>> -------------- >>>>> >>>> >>>> >>> -------------- >>> ro...@go... >>> rob.goto10.org >>> -------------- >>> >> >> >> ------------------------------------------------------------------------------ >> Download Intel® Parallel Studio Eval >> Try the new software tools for yourself. Speed compiling, find bugs >> proactively, and fine-tune applications for parallel performance. >> See why Intel Parallel Studio got high marks during beta. >> http://p.sf.net/sfu/intel-sw-dev >> _______________________________________________ >> Mlt-devel mailing list >> Mlt...@li... >> https://lists.sourceforge.net/lists/listinfo/mlt-devel >> > > > > -- > +-DRD-+ > |
