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Autres articles (37)
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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
Utilisation et configuration du script
19 janvier 2011, parInformations spécifiques à la distribution Debian
Si vous utilisez cette distribution, vous devrez activer les dépôts "debian-multimedia" comme expliqué ici :
Depuis la version 0.3.1 du script, le dépôt peut être automatiquement activé à la suite d’une question.
Récupération du script
Le script d’installation peut être récupéré de deux manières différentes.
Via svn en utilisant la commande pour récupérer le code source à jour :
svn co (...)
Sur d’autres sites (5472)
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Use C# to converting apng to webm with ffmpeg from pipe input and output
30 novembre 2022, par martin wangI was using ffmpeg to convert Line sticker from apng file to webm file.
And the result is weird, some of them was converted successed and some of them failed.
not sure what happend with these failed convert.


Here is my c# code to convert Line sticker to webm,
and I use CliWrap to run ffmpeg command line.


async Task Main()
{

 var downloadUrl = @"http://dl.stickershop.LINE.naver.jp/products/0/0/1/23303/iphone/stickerpack@2x.zip";
 var arg = @$"-i pipe:.png -vf scale=512:512:force_original_aspect_ratio=decrease:flags=lanczos -pix_fmt yuva420p -c:v libvpx-vp9 -cpu-used 5 -minrate 50k -b:v 350k -maxrate 450k -to 00:00:02.900 -an -y -f webm pipe:1";

 var errorCount = 0;
 try
 {
 using (var hc = new HttpClient())
 {
 var imgsZip = await hc.GetStreamAsync(downloadUrl);

 using (ZipArchive zipFile = new ZipArchive(imgsZip))
 {
 var files = zipFile.Entries.Where(entry => Regex.IsMatch(entry.FullName, @"animation@2x\/\d+\@2x.png"));
 foreach (var entry in files)
 {
 try
 {
 using (var fileStream = File.Create(Path.Combine("D:", "Projects", "ffmpeg", "Temp", $"{Path.GetFileNameWithoutExtension(entry.Name)}.webm")))
 using (var pngFileStream = File.Create(Path.Combine("D:", "Projects", "ffmpeg", "Temp", $"{entry.Name}")))
 using (var entryStream = entry.Open())
 using (MemoryStream ms = new MemoryStream())
 {
 entry.Open().CopyTo(pngFileStream);

 var result = await Cli.Wrap("ffmpeg")
 .WithArguments(arg)
 .WithStandardInputPipe(PipeSource.FromStream(entryStream))
 .WithStandardOutputPipe(PipeTarget.ToStream(ms))
 .WithStandardErrorPipe(PipeTarget.ToFile(Path.Combine("D:", "Projects", "ffmpeg", "Temp", $"{Path.GetFileNameWithoutExtension(entry.Name)}Info.txt")))
 .WithValidation(CommandResultValidation.ZeroExitCode)
 .ExecuteAsync();
 ms.Seek(0, SeekOrigin.Begin);
 ms.WriteTo(fileStream);
 }
 }
 catch (Exception ex)
 {
 entry.FullName.Dump();
 ex.Dump();
 errorCount++;
 }
 }
 }

 }
 }
 catch (Exception ex)
 {
 ex.Dump();
 }
 $"Error Count:{errorCount.Dump()}".Dump();

}


This is the failed convert file's error information from ffmpeg :




And the successed convert file from ffmpeg infromation :



It's strange when I was manually converted these failed convert file from command line, and it will be converted successed.



The question is the resource of images are all the same apng file,
so I just can't understan why some of files will convert failed from my c# code
but also when I manually use command line will be converted successed ?



I have written same exampe from C# to Python...
and here is python code :


from io import BytesIO
import os
import re
import subprocess
import zipfile

import requests


downloadUrl = "http://dl.stickershop.LINE.naver.jp/products/0/0/1/23303/iphone/stickerpack@2x.zip"
args = [
 'ffmpeg',
 '-i', 'pipe:',
 '-vf', 'scale=512:512:force_original_aspect_ratio=decrease:flags=lanczos',
 '-pix_fmt', 'yuva420p',
 '-c:v', 'libvpx-vp9',
 '-cpu-used', '5',
 '-minrate', '50k',
 '-b:v', '350k',
 '-maxrate', '450k', '-to', '00:00:02.900', '-an', '-y', '-f', 'webm', 'pipe:1'
]


imgsZip = requests.get(downloadUrl)
with zipfile.ZipFile(BytesIO(imgsZip.content)) as archive:
 files = [file for file in archive.infolist() if re.match(
 "animation@2x\/\d+\@2x.png", file.filename)]
 for entry in files:
 fileName = entry.filename.replace(
 "animation@2x/", "").replace(".png", "")
 rootPath = 'D:\\' + os.path.join("Projects", "ffmpeg", "Temp")
 # original file
 apngFile = os.path.join(rootPath, fileName+'.png')
 # output file
 webmFile = os.path.join(rootPath, fileName+'.webm')
 # output info
 infoFile = os.path.join(rootPath, fileName+'info.txt')

 with archive.open(entry) as file, open(apngFile, 'wb') as output_apng, open(webmFile, 'wb') as output_webm, open(infoFile, 'wb') as output_info:
 p = subprocess.Popen(args, stdin=subprocess.PIPE,
 stdout=subprocess.PIPE, stderr=output_info)
 outputBytes = p.communicate(input=file.read())[0]

 output_webm.write(outputBytes)
 file.seek(0)
 output_apng.write(file.read())



And you can try it,the result will be the as same as C#.


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I want help in making video collage, tried everything but unsuccessful
16 mars 2016, par Haider AliI want to make Video Collage in which 2 or more videos should be displayed in one frame and then they can be converted into one Video file.
I tried examples but they just add videos at the end of each video to make a long one combine video.
Any Help PleaseString FILE_PATH = "/storage/sdcard0/testing.mp4";
String FILE_PATH2 = "/storage/sdcard0/testing1.mp4";
String FILE_PATH3 = "/storage/sdcard0/testing2.mp4";
File file1 = new File(FILE_PATH);
File file2 = new File(FILE_PATH2);
File file3 = new File(FILE_PATH3);
private ProgressDialog pDialog;
ImageView img,img2,img3;
MediaMetadataRetriever retriever2 = new MediaMetadataRetriever();
MediaMetadataRetriever retriever3 = new MediaMetadataRetriever();
ArrayList<bitmap> bitmapArray1 = new ArrayList<bitmap>();
ArrayList<bitmap> bitmapArray2 = new ArrayList<bitmap>();
ArrayList<bitmap> bitmapArray3 = new ArrayList<bitmap>();
File ScreenDIR = new File("/sdcard/Screens/");
</bitmap></bitmap></bitmap></bitmap></bitmap></bitmap>// have the object build the directory structure, if needed.
double id1=0,id2=0,id3=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ScreenDIR.mkdirs();
img = (ImageView)findViewById(R.id.imageView);
img2 = (ImageView)findViewById(R.id.imageView2);
img3 = (ImageView)findViewById(R.id.imageView3);
new LoadAllProducts().execute();
}
class LoadAllProducts extends AsyncTask {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Extracting Frames. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
if(file1.exists()){
for (long i = 0; i < 5000; i += 1000/14) { // lenms - video length in milliseconds
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
retriever.setDataSource(file1.toString());
// Bitmap bitmap = retriever.getFrameAtTime((i*1000/14), MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
saveBitmapToCahche( getResizedBitmap((retriever.getFrameAtTime((i*1000/14), MediaMetadataRetriever.OPTION_CLOSEST_SYNC)), 500) ,String.valueOf(id1));
id1++;
//bitmapArray1.add(bitmap);
/* File file = new File(ScreenDIR, "sketchpad1" + id1 + ".png");
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//bitmap.compress(Bitmap.CompressFormat.PNG, 30, fOut);
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
} catch (IOException e) {
e.printStackTrace();
}*/
}
}
/* if(file2.exists()){
retriever2.setDataSource(file2.toString());
for (long i = 0; i < 3000; i += 1000/24) { // lenms - video length in milliseconds
bitmap2 = retriever2.getFrameAtTime(i*1000/29, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
//bitmapArray2.add(bitmap2);
File file = new File(ScreenDIR, "sketchpad2" + id2 + ".png");
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
bitmap2.compress(Bitmap.CompressFormat.PNG, 85, fOut);
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
id2++;
} catch (IOException e) {
e.printStackTrace();
}
}
}
if(file3.exists()){
retriever3.setDataSource(file3.toString());
for (long i = 0; i < 3000; i += 1000/24) { // lenms - video length in milliseconds
bitmap3 = retriever3.getFrameAtTime(i*1000/29, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
// bitmapArray3.add(bitmap3);
File file = new File(ScreenDIR, "sketchpad3" + id3 + ".png");
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
bitmap3.compress(Bitmap.CompressFormat.PNG, 85, fOut);
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
id3++;
} catch (IOException e) {
e.printStackTrace();
}
}
}*/
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
img.setImageBitmap(retrieveBitmapFromCache(String.valueOf(id2)));
id2 = 50;
img2.setImageBitmap(retrieveBitmapFromCache(String.valueOf(id2)));
id2 = 69;
img3.setImageBitmap(retrieveBitmapFromCache(String.valueOf(id2)));
// img2.setImageBitmap(bitmapArray2.get(0));
// img3.setImageBitmap(bitmapArray3.get(0));
}
}
public void saveBitmapToCahche(Bitmap bb,String ID ){
Cache.getInstance().getLru().put(ID, bb);
}
public Bitmap retrieveBitmapFromCache(String ID) {
Bitmap bitmap = (Bitmap) Cache.getInstance().getLru().get(ID);
return bitmap;
}
public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
int width = image.getWidth();
int height = image.getHeight();
float bitmapRatio = (float)width / (float) height;
if (bitmapRatio > 0) {
width = maxSize;
height = (int) (width / bitmapRatio);
} else {
height = maxSize;
width = (int) (height * bitmapRatio);
}
return Bitmap.createScaledBitmap(image, width, height, true);
}
}`
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FFMPEG - Scrambled Output converting from VOB with ffmpeg
24 décembre 2013, par MattDI've concatenated a series of VOB files from a DVD into a single VOB file and I am trying to convert it to MP4 or other similar format. I see a lot of errors when converting and the output appears scrambled.
>ffmpeg.exe" -i file.vob -sameq file.mp4
FFmpeg version git-N-29181-ga304071, Copyright (c) 2000-2011 the FFmpeg develope
rs
built on Apr 18 2011 21:24:03 with gcc 4.5.2
configuration: --enable-gpl --enable-version3 --enable-runtime-cpudetect --ena
ble-memalign-hack --enable-avisynth --enable-bzlib --enable-frei0r --enable-libo
pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --
enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger
--enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enabl
e-libx264 --enable-libxavs --enable-libxvid --enable-zlib --cross-prefix=i686-w6
4-mingw32- --target-os=mingw32 --arch=x86_32 --extra-cflags=-I/home/kyle/softwar
e/ffmpeg/external-libraries/win32/include --extra-ldflags=-L/home/kyle/software/
ffmpeg/external-libraries/win32/lib --pkg-config=pkg-config
libavutil 50. 40. 1 / 50. 40. 1
libavcodec 52.120. 0 / 52.120. 0
libavformat 52.108. 0 / 52.108. 0
libavdevice 52. 4. 0 / 52. 4. 0
libavfilter 1. 79. 0 / 1. 79. 0
libswscale 0. 13. 0 / 0. 13. 0
[mpeg2video @ 01751A90] ac-tex damaged at 5 16
[mpeg2video @ 01751A90] invalid mb type in I Frame at 0 1
[mpeg2video @ 01751A90] invalid mb type in I Frame at 0 2
[mpeg2video @ 01751A90] invalid mb type in I Frame at 0 3
[mpeg2video @ 01751A90] invalid mb type in I Frame at 0 4
[...]I'm guessing this is CSS scrambling and I need to do some sort of DeCSS. Does FFMpeg have an option for this ? Cringe if you'd like, but is there C# source to achieve this ?
My end goal is really just to get some DVDs that I own onto my media server. I've tried a few demo-ware products with limited success including Acala DVD Ripper, Click to Disk, AVIDemux to name a few. I even paid for a couple of them to get the full version, but Acala only works for about half of my DVDs and Click to Disk can decode the VOB, but I need to use FFMpeg to convert. I'd like to have it all in one app that works and I am willing to write some code for it.
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