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Autres articles (48)
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Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
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List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...) -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
Sur d’autres sites (3012)
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how to solve '[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found' in opencv
9 juillet 2022, par Daniel dos SantosI'm trying to create a video uploader in a kivy app using OpenCV. However, when I try to upload a video, I get the following error



[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000021c356d9e00] moov atom not found
...



The screen becomes unresponsive during this. I edited the save() function recently and added an uploadClass() because I was getting another error.



main.py



...

class SaveDialog(Screen):
 save = ObjectProperty(None)
 text_input = ObjectProperty(None)
 cancel = ObjectProperty(None)

 def save(self, path, filename):

 for letter in os.path.join(path, filename):
 print(letter)

 def find(s, ch):
 return [i for i, letter in enumerate(s) if letter == ch]

 os_path_simpl = list(os.path.join(path, filename))

 for t in range(len(find(os.path.join(path, filename), '\\'))):
 os_path_simpl[find(os.path.join(path, filename), '\\')[t]] = '\\'

 class uploadClass(object):
 video = ''.join(os_path_simpl)

 def __init__(self, src=video):
 self.video_selected = cv2.VideoCapture(src)

 self.vid_cod = cv2.VideoWriter_fourcc(*'mp4v')
 self.out = cv2.VideoWriter('media/testOne.mp4', self.vid_cod, 20.0, (640,480))

 self.thread = Thread(target=self.update, args=())
 self.thread.daemon = True
 self.thread.start()

 def update(self):
 while True:
 if self.video_selected.isOpened():
 (self.status, self.frame) = self.video_selected.read()

 def show_frame(self):
 if self.status:
 cv2.imshow('uploading', self.frame)

 if cv2.waitKey(10) & 0xFF == ord('q'):
 self.video_selected.release()
 self.out.release()
 cv2.destroyAllWindows()
 exit(1)

 def save_frame(self):
 self.out.write(self.frame)

 rtsp_stream_link = 'media/testOne.mp4'
 upload_Class = uploadClass(rtsp_stream_link)
 while True:
 try:
 upload_Class.__init__()
 upload_Class.show_frame()
 upload_Class.save_frame()
 except AttributeError:
 pass

 sm.current = "home"

...



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How to make customizable subtitles with FFmpeg ?
6 août 2022, par Alex RypunI need to generate videos with text (aka subtitles) and styles provided by users.
The styles are a few fonts, text border, text background, text shadow, colors, position on the video, etc.


As I understand there are 2 filters I can use :
drawtextandsubtitles.

subtitlesis easier to use but it's not fully customizable. For example, I can't add shadow and background for the same text.

drawtextis more customizable but quite problematic.

I've implemented almost everything I need with
drawtextbut have one problem : multiline text with a background.

boxborderwparameter adds specified pixels count from all 4 sides from the extreme text point. I need to make backgrounds touch each other (pixel perfect). That means I have to position text lines with the same space between extreme text points (not between baselines). With crazy workarounds I solved it.
Everything almost works but sometimes some strange border appears between lines :



Spending ages investigating I figured out that it depends on the actual line height and the position on the video.
Each letter has its own distances between baseline and the highest point and between baseline and the lowest point.
The whole line height is the difference between the highest point of the highest symbol and the lowest point of the lowest symbol :




Now the most interesting.


For lines that have even pixels height.


If the line is positioned on the odd pixel (y-axis) and has an odd
boxborderw(or positioned on the even pixel (y-axis) and has an evenboxborderw), then it's rendered as expected (without any additional borders).
In other cases, the thin dark line is noticeable on the contact line (it's rendered either on top or at bottom of each text block :




For lines that have odd pixels height.


In all cases the thin dark line is noticeable. Depending on y coordinate (odd or even) and
boxborderwvalue (odd or even) that magic line appears on top or bottom :



I can make text lines overlap a bit. This solves the problem but adds another problem.
I use fade-in/out by smoothly changing
alfa(transparency). When the text becomes semi-transparent the overlapped area has a different color :



Here is the command I use :


ffmpeg "-y" "-f" "lavfi" "-i" "color=#ffffff" "-filter_complex" \
"[0:v]loop=-1:1:0,trim=duration=2.00,format=yuv420p,scale=960:540,setdar=16/9[video];\
[video]drawtext=text='qqq':\
fontfile=ComicSansMS.ttf:\
fontcolor=#ffffff:\
fontsize=58:\
bordercolor=#000000:\
borderw=2:\
box=1:\
boxcolor=#ff0000:\
boxborderw=15:\
x=(w-text_w)/2:\
y=105:\
alpha='if(lt(t,0),0,if(lt(t,0.5),(t-0)/0.5,if(lt(t,1.49),1,if(lt(t,1.99),(0.5-(t-1.49))/0.5,0))))',\
drawtext=text='qqq':\
fontfile=ComicSansMS.ttf:\
fontcolor=#ffffff:\
fontsize=58:\
bordercolor=#000000:\
borderw=2:\
box=1:\
boxcolor=#ff0000:\
boxborderw=15:\
x=(w-text_w)/2:\
y=182:\
alpha='if(lt(t,0),0,if(lt(t,0.5),(t-0)/0.5,if(lt(t,1.49),1,if(lt(t,1.99),(0.5-(t-1.49))/0.5,0))))'[video]" \
"-vsync" "2" "-map" "[video]" "-r" "25" "output_multiline.mp4"


I tried to draw rectangles with
drawboxfollowing the same logic (changing the position and height). But there were no problems.

Does anybody know what is the nature of that dark line ?
And how it can depend on the even/odd of the height and position ?
What should I investigate to figure out such a behavior ?


UPD :


Just accidentally figured out that changing the pixel format (from
format=yuv420ptoformat=uyvy422or many others) solved the problem. At least on my test commands.
Now will learn about what is pixel format)

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Is there a way to program the (Download) button to save a group of images as a one video ?
9 février 2024, par Lina Al-fawzanThis is my entire code. Its function is that everything the user writes or says will have images returned to him according to what he wrote/said, and the next image will be shown to him after he presses “close,” and he can save each image separately. I want to make a simple modification to it. First, instead of a close button, I want each image to be displayed for 3 seconds and the next one to be displayed, and so on... “all of them in one window”, and for the “download” button to be when the last image is displayed, and for them all to be saved in one video.


import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'dart:convert';
import 'dart:typed_data';
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:speech_to_text/speech_to_text.dart' as stt;

void main() {
 runApp(MyApp());
}

class MyApp extends StatelessWidget {
 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 home: MyHomePage(),
 );
 }
}

class MyHomePage extends StatefulWidget {
 @override
 _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<myhomepage> {
 TextEditingController _textEditingController = TextEditingController();
 late stt.SpeechToText _speech;
 bool _isListening = false;

 @override
 void initState() {
 super.initState();
 _speech = stt.SpeechToText();
 }

 void _listen() async {
 if (!_isListening) {
 bool available = await _speech.initialize(
 onStatus: (val) => print('onStatus: $val'),
 onError: (val) => print('onError: $val'),
 );
 if (available) {
 setState(() => _isListening = true);
 _speech.listen(
 onResult: (val) => setState(() {
 _textEditingController.text = val.recognizedWords;
 if (val.hasConfidenceRating && val.confidence > 0) {
 _showImages(val.recognizedWords);
 }
 }),
 );
 }
 } else {
 setState(() => _isListening = false);
 _speech.stop();
 }
 }

 @override
 Widget build(BuildContext context) {
 return Scaffold(
 appBar: AppBar(
 title: Text('Image Viewer'),
 ),
 body: Padding(
 padding: const EdgeInsets.all(16.0),
 child: Column(
 mainAxisAlignment: MainAxisAlignment.center,
 children: [
 TextField(
 controller: _textEditingController,
 decoration: const InputDecoration(
 labelText: 'Enter a word',
 ),
 ),
 SizedBox(height: 16.0),
 ElevatedButton(
 onPressed: () {
 String userInput = _textEditingController.text;
 _showImages(userInput);
 },
 child: Text('Show Images'),
 ),
 SizedBox(height: 16.0),
 ElevatedButton(
 onPressed: _listen,
 child: Text(_isListening ? 'Stop Listening' : 'Start Listening'),
 ),
 ],
 ),
 ),
 );
 }

Future<void> _showImages(String userInput) async {
 String directoryPath = 'assets/output_images/';
 print("User Input: $userInput");
 print("Directory Path: $directoryPath");

 List<string> assetFiles = await rootBundle
 .loadString('AssetManifest.json')
 .then((String manifestContent) {
 final Map manifestMap = json.decode(manifestContent);
 return manifestMap.keys
 .where((String key) => key.startsWith(directoryPath))
 .toList();
 });

 List<string> imageFiles = assetFiles.where((String assetPath) =>
 assetPath.toLowerCase().endsWith('.jpg') ||
 assetPath.toLowerCase().endsWith('.gif')).toList();

 List<string> words = userInput.split(' '); // Tokenize the sentence into words

 for (String word in words) {
 String wordImagePath = '$directoryPath$word.gif';

 if (imageFiles.contains(wordImagePath)) {
 await _showDialogWithImage(wordImagePath);
 } else {
 for (int i = 0; i < word.length; i++) {
 String letter = word[i];
 String letterImagePath = imageFiles.firstWhere(
 (assetPath) => assetPath.toLowerCase().endsWith('$letter.jpg'),
 orElse: () => '',
 );
 if (letterImagePath.isNotEmpty) {
 await _showDialogWithImage(letterImagePath);
 } else {
 print('No image found for $letter');
 }
 }
 }
 }
}

 

 Future<void> _showDialogWithImage(String imagePath) async {
 await showDialog<void>(
 context: context,
 builder: (BuildContext context) {
 return AlertDialog(
 content: Image.asset(imagePath),
 actions: [
 TextButton(
 onPressed: () {
 Navigator.of(context).pop();
 },
 child: Text('Close'),
 ),
 TextButton(
 onPressed: () async {
 await _downloadImage(imagePath);
 Navigator.of(context).pop();
 },
 child: Text('Download'),
 ),
 ],
 );
 },
 );
 }

 Future<void> _downloadImage(String assetPath) async {
 try {
 final ByteData data = await rootBundle.load(assetPath);
 final List<int> bytes = data.buffer.asUint8List();

 final result = await ImageGallerySaver.saveImage(Uint8List.fromList(bytes));

 if (result != null) {
 ScaffoldMessenger.of(context).showSnackBar(
 SnackBar(
 content: Text('Image saved to gallery.'),
 ),
 );
 } else {
 ScaffoldMessenger.of(context).showSnackBar(
 SnackBar(
 content: Text('Failed to save image to gallery.'),
 ),
 );
 }
 } catch (e) {
 print('Error downloading image: $e');
 }
 }
}

</int></void></void></void></string></string></string></void></myhomepage>

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