ffmpeg Questions
3
Solved
I am using this command
sudo port install ffmpeg +gpl +postproc +lame +theora +libogg +vorbis +xvid +x264 +a52 +faac +faad +dts +nonfree
But the installed version of ffmpeg I get is only 0.7.13....
Glyco asked 20/10, 2012 at 21:17
21
Example code:
from moviepy.editor import *
clip = VideoFileClip('video.mp4')
clip.write_videofile('video2.mp4', fps=30)
After showing the following messages, showing that the video is being built ...
Soredium asked 18/6, 2021 at 9:42
2
Solved
I generate webm files in two different ways. One using Chrome WebRTC MediaRecorder, the other one is using a js library which generates the webm video frame by frame (webm-writer-js). The file size...
5
Solved
Based on this article it seems that it is possible to use FFMPEG to detect scene change in videos:
http://www.luckydinosaur.com/u/ffmpeg-scene-change-detector
Now I have a video that displays a bo...
9
Solved
I am building an app with node.js, I successfully uploaded the video, but I need to generate a video thumbnail for it. Currently I use node exec to execute a system command of ffmpeg to make the th...
Eutectoid asked 26/10, 2012 at 1:49
3
Solved
I'm trying to convert a .ts file with this output to mkv:
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.27)
configurati...
Spiller asked 2/2, 2021 at 16:15
3
When I use ffmpeg to convert m3u8 to mp4, I get some warning,
ffmpeg -i xx.m3u8 -c copy demo.mp4
warning is
Non-monotonous DTS in output stream 0:1; previous: 3277744, current: 3276712;...
2
When I decode video frames with FFmpeg (avcodec_decode_video2(), sws_scale()), with some videos (e.g., ProRes4444), I get colors pre-multiplied by alpha, and with other videos (e.g., QuickTime PNG)...
Pectoralis asked 23/11, 2013 at 5:44
2
Solved
As OBS Studio lacks a visual indicator to show how far a video has progressed (and when you need to advance to the next scene), I was wondering if there is a command-line option (or solution) to ge...
Deirdre asked 20/7, 2020 at 6:49
5
Here is a simple request, it has an input, output, and two watermarks. From what I gathered I can't apply -codec copy because I'm using a filter.
ffmpeg -i input.mp4 -i wm-bl.png -i wm-br.png -fil...
Otoscope asked 6/12, 2013 at 23:29
3
Solved
How would I go about getting a list of all the file extensions supported by FFmpeg for use in an ExtensionFilter used by FileChooser in JavaFX?
I am familiar with the "-codecs" and "-formats" opti...
6
Solved
I have a webcam video recorder program built with python, opencv and ffmpeg
It works ok except that the color of the video is more blue than the reality. The problem seems to come from color forma...
Priscilapriscilla asked 19/9, 2012 at 21:44
6
Solved
I'm running ffmpeg on another machine for screen capture. I'd like to be able to stop it recording remotely. FFMPEG requires that q is pressed to stop encoding as it has to do some finalization to ...
2
I am trying to play USB Webcam stream(not sure in which format it is..) using ffplay in windows. I can see the video without any issue, But I am keep getting below error in console.
ffplay.exe ...
Deenadeenya asked 31/3, 2019 at 8:41
4
Solved
I am writing a program in Python on RaspberryPi(Raspbian), to combine / merge an audio file with video file.
Format of Audio file is WAVE
Format of Video file is h264
Audio and video already record...
Immobile asked 29/1, 2015 at 14:53
3
Solved
I have a opengl buffer that I need to forward directly to ffmpeg to do the nvenc based h264 encoding.
My current way of doing this is glReadPixels to get the pixels out of the frame buffer a...
5
Solved
I am adding subtitles to a video using:
ffmpeg -i "imput.mp4" -lavfi "subtitles=subtitles.srt:force_style='OutlineColour=&H100000000,BorderStyle=3,Outline=1,Shadow=0,Fontsize=18'" -crf 1 -c:a ...
4
Solved
I have installed ffmpeg (version 4) with Homebrew and I am trying to use the various ffmpeg libraries in a C++ project, but I am getting multiple errors during linking.
Undefined symbols for arch...
2
To get a thumbnail from an image halfway through the video I can do ffmpeg -ss 100 -i /tmp/video.mp4 -frames:v 1 -s 200x100 image.jpg. By using -ss 100 it gets a thumbnail at 100 seconds (which wou...
Ungraceful asked 12/1, 2017 at 10:2
5
I had previously built this youtube downloader but when I tested it recently; it stopped working.
from pytube import YouTube
import ffmpeg
import os
raw = 'C:\ProgramData\ytChache'
path1 = 'C:\Pr...
2
Solved
I'm trying to record video from my ip camera stream with ffmpeg in command line
fmpeg -rtsp_transport tcp \
> -i rtsp://192.168.0.250/stream1 \
> -c copy \
> -map 0 \
> -f segment \
>...
4
Solved
TL;DR
I'm trying to programmatically download a part of a YouTube video. The widely known procedure doesn't work for some videos and I'd like to overcome this situation.
Context
I'm trying to prog...
Irrigate asked 16/8, 2020 at 10:25
1
I want to limit max fps when I process a video.
For example: set limit up to 30 frames per second.
If I process a video with 24 fps then I don't change fps but if I process the video with 60 fps th...
Krahmer asked 6/11, 2015 at 22:29
2
I have been trying to concatenate a number of MP4 clips (h264,aac) using the FFMPEG concat protocol documented here. The clips concatenate successfully, however there are multiple errors in the log...
1
The videos I am trying to concatenate can have different technical metadata, like codec, resolution, etc. So I wrote a filtergraph that works for my purposes. My complete command can look like this...
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