gstreamer and mp4 or avi output with audio

I have the syntax below that will show the video of my webcam on the screen and encode the video to an ogv file. What I would like to do is show the video on the screen but change it from an ogv...

Cannot convert MOV files to other video formats using avconv on Ubuntu

I recently received some MOV files that had been recorded on an iPhone (not sure which version - I can get that info if needed). I have been trying to convert these MOVs into another format...

Error building Mlt on Windows using MinGw. Undefined reference dlsym dlclose dlopen dlerror dlclose

I faced some problems while building MLT framework on windows using MinGw. I tried to follow instructions on http://www.mltframework.org/bin/view/MLT/WindowsBuild . I completed every step until...

First frame in rendered kdenlive project is mute, why?

I have video in Kdenlive and I'm adding 2 guides which will be a place to cut my project: http://www.netcreate.pl/kden1.png This video isn't mute as you can see. Next I render this parts using...

Error building MLT framework on Windows

I've been following the official building guide provided here. I need MLT to create a video player and I opted to only install the first 4 libraries, as stated on the guide (FFmpeg, SDL,...

Realistic memory usage for MLT Framework project?

I am trying to render a video project that I created with kdenlive. It is about 50 minutes long and contains a dozen short 1080p video clips and several hundred still images (mostly 18MP). melt...

using mpegtsmux in gstreamer's pipeline for recording video

I would like to capture a video stream (+audio) in MJPEG from my webcam into .mts container using this pipeline: gst-launch-1.0 v4l2src do-timestamp=true device=/dev/video0 \ ! ...

(MLT Framework) How does a <tractor> decide which frame to use from which <track>, taking <transition>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...

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...

Animated GIF to video with ffmpeg - wrong timing

I'm trying to convert an animated GIF to video with ffmpeg, but there's a strange problem: the time delays of each frame seem to be off by one frame. For example, if the frame #1 is supposed to be...

Kdenlive affine/composite transparent title over multiple tracks

In Kdenlive, I can create a title clip with a transparent background and "affine" it over another track, to get a "lower third" or "title" effect, and that works fine. However, I have to specify a...

Workflow for creating animated hand-drawn videos - encoding difficulties

I want to create YouTube videos, kind of in the style of a white-board animation. Tldr question: How can I encode into a lossless rgb video format with ffmpeg, including alpha channel? More...

Dnf removes many dependencies along mariadb-config and mariadb-common

Working on Fedora 26. Had mariadb 10.1.26 installed but I need some features available on 10.2.2. To install MariaDB-server 10.2 from MariaDB repositories, it seems necessary to remove...

{kdenlive} How do I join two adjacent clips into one in kdenlive?

Suppose I made a mistake: I cut a clip into two using the scissor tool, and I did it off by a few frames. I want to undo the mistake and join the clips together again and split them at the right...

Embedded local mp4 not playing in Chrome when running jekyll serve (ECONNRESET)

I'm working on a simple jekyll site, and am wanting to embed a video (locally-stored mp4 - not youtube/streaming service) in a markdown file. I'm just using the basic tag: <video width="600"...

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...

MLT - 10-bit LUT support

I'm an MLT user via several open source NLE video editors (kdenlive). It appears that MLT is unable to process a 10 bit LUT. Prior to MLT 6.10 applying a 10 bit LUT like the DJI Mavic 2 Pro DLOG-M...

Kdenlive record audio-only voiceover?

I would like to record a voiceover for a video sequence using Kdenlive. When I click the Clip Monitor tab, uncheck Video, check Audio, and then press the Record button, I am getting an...

Python Traceback Error When Reading Json File

I just extracted my all my tweeter history in a json file. so I want to do some data analysis on the tweets with python. I open the terminal and and entered the following commands to dump json...

melt failed to load filter and transition qtblend

I've installed melt from sources in Ubuntu 18.10, codename:cosmic Everything seems to be fine but when I'm trying to play some kdenlive file I got [producer_xml] failed to load filter...

devcontainer, how to make X display work (mount graphics inside docker in visual studio code)

Normally I use this trick to make X work inside docker: docker run --rm -it -v /tmp/.X11-unix:/tmp/.X11-unix -v $HOME/Videos:/videos -e DISPLAY=unix$DISPLAY --name knl kdenlive I tried doing the...

MLT query video_codecs not listing libx264

Querying video codecs does not list libx264 as an available codec [[email protected] ~]$ melt -query video_codecs | grep 264 - h264_nvenc - h264_v4l2m2m - h264_vaapi - nvenc_h264 - h264 ...