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Questions tagged [mlt]

MLT is an open source multimedia framework, designed and developed for television broadcasting. It provides a toolkit for broadcasters, video editors, media players, transcoders, web streamers and many more types of applications.

MLT is an open source multimedia framework, designed and developed for television broadcasting. It provides a toolkit for broadcasters, video editors, media players, transcoders, web streamers and many more types of applications.

The functionality of the system is provided via an assortment of ready to use tools, XML authoring components, and an extensible plug-in based API.

Source: http://www.mltframework.org

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MLT XML: specifying codec for input data

I'd like to change the codec ffmpeg inside MLT is using to decode the producer file from native opus to libopus. The FFmpeg command should be like: ffmpeg -acodec libopus -i 851515232352539900.mkv.... How can I specify that codec via MLT XML? Using…
Konstantin
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Understanding MLT melt mixer luma mix (fade) duration?

Related to Understanding/controlling MLT melt slideshow?, I am trying to understand how does melt's luma mixer work, especially in context of short (small frame number) durations. For instance, if I use something like this specification…
sdaau
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MLT - How to add easing to transition or filter?

Is it possible to make some smooth movement with a picture (or anything else)? An acceleration, deceleration... I know we can use keyframe geometry to move an element but the movement is not smooth. The goal is to add some easing (ease-in / ease-out…
Ced
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mlt melt image slideshow from text file

On my site I have ffmpeg set up to convert a list of image paths from a text file into a slideshow like so -- My text looks something like this (actual file names are not sequential) - ffconcat version 1.0 file 'IMG.PNG' file 'IMG2.JPG' file…
730wavy
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mlt melt slideshow with audio is not playing sound

I am trying to run a melt/mlt command and so far it seems to work EXCEPT there's no audio sound being played. I know the audio track is being added because the length of the video. Here's what I have -- melt \ placeholder.png length=200 \ inside.png…
730wavy
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MLT time specification format

I'm looking for documentation on how MLT parses time specification strings. I see what appears to be two styles: hh:mm:ss.fraction frames I think the number to the right of the decimal in m:s format is a fraction of a second, i.e., 1.5 at 24fps…
iter
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Is there any way to specify clip length instead of using `out` parameter?

I can play a video with melt if I do the command: melt video.mp4 in=50 out=1000 The in parameter lets me specify that I want the video to start at frame 50. The out parameter lets me specify that I want to video to stop playing at frame 1000. My…
mr_lou
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MLT framework. Need to mix soundtracks with volume changes

Need to merge for example 3 videos with/without sound and add soundtrack from mp3 to those who doesn't have sound (videos with sound is known before): melt 1.mp4 2sound.mp4 -mix 30 -mixer luma 3.mp4 -mix 30 -mixer luma -track music.mp3 Added…
user2455079
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Need Preset that will make mp4 H264 with MP3 Encoding

Working With KDEnlive 16.12 on a Ubuntu Mate 16.04.2 i7-920 System From what I understand KDEnlive 16.12 uses the Melt Framework to compose the video presets. Am trying to define a preset for MP4 H264 1920x1080 29.97 with MP3 audio instead of…
Mar Lam
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Bash/MLT : how to load string from file and passing to melt argument

I need to execute the following command : melt color:"#eeeeee" -filter dynamictext:"this text" "this text" is a string from a title.txt file. I read the file by using this method: while IFS='' read -r line || [[ -n "$line" ]]; do echo $line…
ujang kelabu
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Overlay text on video with MLT

My question is similar to Adding text to videos using MLT Framework but I am using a different command. My command is: melt SampleVideo_1280x720_5mb.mp4 -attach watermark:title.txt producer.bgcolor=transparent in=50 out=500 This produces the text…
Lawrence I. Siden
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(MLT Framework) How does a decide which frame to use from which , taking s into account?

I can't get my head around really understanding why MLT, taken the following example, uses video frames from track #1 (middle track) instead of from track #0 with track #2 composed onto it. Any explanation? Let's assume a simple MLT setup, along…
TheDiveO
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MLT Framework, any filter to adjust shadows/highlits?

Any filter to make shadows/highlights like as in Adobe after effects?
user2455079
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MLT Framework. How to add different effects to different clips?

How to add different filter for each clips and make fade transition between them? melt "11.MOV" -filter greyscale "12.MOV" -mix 14 -mixer luma -filter frei0r.sharpness 0=1 that one adds both filters to both clips...
user2455079
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MLT, time varying crop

What I wish to do is to take a video in, say, 16:9 aspect ratio, and generate another in 1:1 aspect ratio by cropping, such that the crop area is time varying. For example, suppose source is 1920x1080: frame 0 crop x from 0 to 1080 frame 200 crop…
John Allsup
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