Recherche avancée
Médias (9)
-
Stereo master soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Audio
-
Elephants Dream - Cover of the soundtrack
17 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
-
#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
Type : Audio
-
#6 Teaser Music
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
-
#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
-
#3 The Safest Place
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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Sur d’autres sites (13170)
-
Last subprocess call not working in concatenation code with FFMPEG. How should I go about fixing this ?
28 novembre 2019, par S1mpleclips = []
#generates a list of mp4 files in a folder
def clipFinder(CurrentDir, fileType):
clips.clear()
for r,d,f in os.walk(CurrentDir):
for file in f:
if fileType in file:
clips.append(r+file)
random.shuffle(clips)
#removes all files that have the string 'vod' in them as they cause problems during concatenation
def removeVods(r):
for f in clips:
if 'vod' in clips:
os.remove(r+f)
#generates a string using the clips list to insert into the ffmpeg command
def clipString():
string = 'intermediate'
clipList = []
clipNum = 1
for f in clips:
clipList.append(string+str(clipNum)+'.ts'+'|')
clipNum+=1
string1 = ''.join(clipList)
string2 = string1[0:len(string1)-1]
return string2
#concatenates the mp4 files in the clipString
def concatFiles():
clipFinder('***', '.mp4')
removeVods('***')
i = 0
intermediates = []
for f in clips:
subprocess.call(['***', '-i', clips[i], '-c', 'copy', '-bsf:v', 'h264_mp4toannexb', '-f', 'mpegts', 'intermediate'+ str(i+1) +'.ts'])
i += 1
clipsLength = len(clips)
subprocess.call['***', '-i', '"concat:' + clipString() + '"', '-c', 'copy', '-bsf:a
aac_adtstoasc', 'output.mp4']I am trying to make a clip concatenator, but the last subprocess call won’t run and gives me no error. When I run the script the first FFmpeg call works fine and gives me my intermediate mp4 files, however, the second command, which works when I run it in terminal, does not work when I run it from python using subprocess.call.
Problematic code :
subprocess.call(['***', '-i', '"concat:' + clipString() + '"', '-c', 'copy', '-bsf:a aac_adtstoasc', 'output.mp4'])all places with * were paths such as : /davidscomputer/bin/ffmpeg/
-
Error with FFmpeg and FS in React : "ErrnoError : FS error"
23 juillet 2024, par namwanI'm working on a React application where I'm using the @ffmpeg/ffmpeg library to compress images and videos. I'm facing an issue with the virtual file system (FS) when trying to read and write files using FFmpeg. I'm getting the following error :


ErrnoError: FS error


Here's the relevant part of my code :


import React, { useState } from "react";
import { FFmpeg } from "@ffmpeg/ffmpeg";

const ffmpeg = new FFmpeg();

const fetchFile = async (filePath) => {
 const file = await ffmpeg.readFile(filePath);
 alert("hello");
 return new Uint8Array(file).buffer;
};


const Main = () => {
 const [file, setFile] = useState(null);
 const [compressedFile, setCompressedFile] = useState("");

 const loadFFmpeg = async () => {
 if (!ffmpeg.isLoaded) {
 await ffmpeg.load();
 }
 }; 

 const getFile = (event) => {
 const selectedFile = event.target.files[0];
 
 if (selectedFile) {
 setFile(selectedFile);
 }
 };

 const compressImage = (selectedFile) => {
 const img = new Image();
 img.src = URL.createObjectURL(selectedFile);
 img.onload = () => {
 const canvas = document.createElement('canvas');
 const MAX_WIDTH = 300;
 const MAX_HEIGHT = 300;
 let width = img.width;
 let height = img.height;

 if (width > height) {
 if (width > MAX_WIDTH) {
 height *= MAX_WIDTH / width;
 width = MAX_WIDTH;
 }
 } else {
 if (height > MAX_HEIGHT) {
 width *= MAX_HEIGHT / height;
 height = MAX_HEIGHT;
 }
 }

 canvas.width = width;
 canvas.height = height;
 const ctx = canvas.getContext('2d');
 ctx.drawImage(img, 0, 0, width, height);
 const dataUrl = canvas.toDataURL('image/jpeg', 1.0);
 setCompressedFile(dataUrl);
 };
 };

 const compressVideo = async (selectedFile) => {
 try {
 await loadFFmpeg();
 
 const arrayBuffer = await selectedFile.arrayBuffer();
 const fileName = selectedFile.name;
 
 await ffmpeg.writeFile(fileName, new Uint8Array(arrayBuffer));
 
 await ffmpeg.exec(
 '-i',
 fileName,
 '-vf',
 'scale=640:-1',
 '-c:a',
 'aac',
 '-strict',
 '-2',
 'output.mp4'
 );
 
 const data = await fetchFile('output.mp4');
 const compressedVideoBlob = new Blob([data], { type: 'video/mp4' });
 const compressedVideoUrl = URL.createObjectURL(compressedVideoBlob);
 setCompressedFile(compressedVideoUrl);
 
 await ffmpeg.unlink(fileName);
 await ffmpeg.unlink('output.mp4');
 
 alert('Compression successful');
 } catch (error) {
 console.error('Error:', error);
 alert('Compression failed. Please check the console for more details.');
 }
 };
 

 const handleSubmit = async (e) => {
 e.preventDefault();

 if (file) {
 const fileType = file.name.split('.').pop().toLowerCase();

 if (fileType === 'png' || fileType === 'jpg' || fileType === 'jpeg') {
 compressImage(file);
 } else if (fileType === 'mp4' || fileType === 'h264') {
 compressVideo(file);
 } else {
 alert('Please select a valid file type (png, jpg, jpeg for images or mp4, h264 for videos).');
 }
 }
 };

 const handleDownload = () => {
 if (file) {
 const downloadLink = document.createElement('a');
 downloadLink.href = compressedFile;

 const fileExtension = file.name.split('.').pop().toLowerCase();

 downloadLink.download = `compressed_file.${fileExtension}`;
 
 document.body.appendChild(downloadLink);
 downloadLink.click();
 document.body.removeChild(downloadLink);
 }
 };

 return (
 <>
 <h1>Main Page</h1>
 <form>
 <label>Upload</label>
 <input type="'file'" />
 <br /><br />
 <input type="submit" value="Compress" />
 </form>
 {compressedFile && (
 <>
 <h2>Compressed File Preview</h2>
 {file && file.name && ( 
 file.name.split('.').pop().toLowerCase() === 'mp4' || file.name.split('.').pop().toLowerCase() === 'h264' ? (
 <video width="300" controls="controls">
 <source src="{compressedFile}" type="video/mp4"></source>
 Your browser does not support the video tag.
 </video>
 ) : (
 <img src="http://stackoverflow.com/feeds/tag/{compressedFile}" alt="Compressed file preview" style='max-width: 300px; max-height: 300px' />
 )
 )}
 <br /><br />
 <button>Download Compressed File</button>
 >
 )}
 >
 );
};

export default Main;


I'm using ffmpeg.readFile and ffmpeg.writeFile to read and write files to FFmpeg's virtual file system. I've also tried using ffmpeg.read and ffmpeg.write but still encounter the same issue.


Could someone please help me understand what might be causing this FS error and how to resolve it ?


-
Change input source based on intensity of audio using FFmpeg
24 mai 2020, par Harry BlueI have script that allows me to encode an audio stream and an mp4 file with visual effects applied over the top.



The effects are synced to the music and whilst the effects are simple, they work well.



I am using ffmpeg, mediainfo, randomize-lines, bc.



#!/bin/bash

#########################
## START CONFIGURATION ##
#########################

# path to video playlist.txt
playlist="playlist.txt";

# output frame size
outsize="1920x1080";

# frames per second
fps="60";

# video bitrate
bv="20M";

# audio bitrate
ba="96k";

# video codec
cv="h264";

# audio codec
ca="libfdk_aac";

# output container format
fmt="mp4";

# base frequency (Hz)
bfreq="20";

# end frequency (Hz)
efreq="1420";

#######################
## END CONFIGURATION ##
#######################

viz="volume=2,showcqt=s=1920x144:text=0:r=$fps:axis=0:basefreq=$bfreq:endfreq=$efreq:count=15:sono_g=4:bar_g=4:bar_v=35:sono_h=144:sono_v=bar_v*a_weighting(f):tc=0.1,rotate=1200*sin(200*PI/200*t):ow=24:oh=24:c=none,scale=$outsize,setsar=1/1[viz];[1:v]scale=$outsize,setsar=1/1[vid1];[viz][vid1]blend=all_mode=heat:shortest=1:repeatlast=0,hue="H="2*PI*t/420""";
enc="-s $outsize -c:a $ca -b:a $ba -c:v $cv -preset ultrafast -b:v $bv -profile:v high -level 4.2 -g "$(bc <<< $fps*2)" -bf 2 -x264opts keyint="$(bc <<< $fps*2)":min-keyint="$(bc <<< $fps*2)":8x8dct=1 -pix_fmt yuv420p -r $fps";
ffmpeg -hide_banner -i "$1" -r $fps -stream_loop -1 -i one.mp4 -filter_complex $viz $enc -f $fmt "$2";



This can be invoked using something like



./stream.sh http://ic2255.c471.fast-serv.com/autodj file.mp4


What I would like to do is use different input videos based on the intesity of the music, in the same way the effects are applied.



I created a
playlist.txtfile that contains my mp4 video input files


one.mp4
two.mp4



and made a change to this like



ffmpeg -hide_banner -i "$1" -r $fps -stream_loop -1 -i one.mp4 -filter_complex $viz $enc -f $fmt "$2";



So it uses a random file



randfile="$(cat "$playlist" | rl | head -1)";
ffmpeg -hide_banner -i "$1" -r $fps -stream_loop -1 -i "$randfile" -filter_complex $viz $enc -f $fmt "$2";



However this only works for the initial input, it does not yet change the input, only loops that mp4.



Is this possible ?


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