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Autres articles (78)
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Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
Pas question de marché, de cloud etc...
10 avril 2011Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
sur le web 2.0 et dans les entreprises qui en vivent.
Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...) -
Liste des distributions compatibles
26 avril 2011, parLe tableau ci-dessous correspond à la liste des distributions Linux compatible avec le script d’installation automatique de MediaSPIP. Nom de la distributionNom de la versionNuméro de version 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
Si vous souhaitez nous aider à améliorer cette liste, vous pouvez nous fournir un accès à une machine dont la distribution n’est pas citée ci-dessus ou nous envoyer le (...)
Sur d’autres sites (8423)
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streamer.dart missing from flutter flutter_ffmpeg pkg
7 mars 2023, par user2928137Trying to build simple app which open camera from app and start streaming to server
end server is RTSP server will continuously receiving video feed
Web server is compatible with ffmpeg pkg however flutter_ffmpeg pkg face bellow issue.

App is simple to start RTSP video stream from flutter mobile app



Target of URI doesn't exist : 'package:flutter_ffmpeg/streamer.dart'.




import 'dart:io';
import 'package:flutter/material.dart';
import 'package:camera/camera.dart';
import 'package:flutter_ffmpeg/flutter_ffmpeg.dart';
import 'package:flutter_ffmpeg/streamer.dart';
import 'package:video_player/video_player.dart';

void main() {
 WidgetsFlutterBinding.ensureInitialized();
 runApp(MyApp());
}

class MyApp extends StatefulWidget {
 const MyApp({Key? key}) : super(key: key);

 @override
 _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<myapp> {
 List<cameradescription> cameras = [];
 late CameraController cameraController;
 String streamUrl = "rtsp://<>/userID";
 FFmpegStreamer? ffmpegStreamer;

 Future<void> initializeCamera() async {
 cameras = await availableCameras();
 cameraController = CameraController(cameras[0], ResolutionPreset.high);
 await cameraController.initialize();
 }

 @override
 void initState() {
 super.initState();
 initializeCamera();
 ffmpegStreamer = FlutterFFmpegStreamer();
 }

 Future<void> startStream() async {
 await cameraController.startImageStream((image) async {
 if (ffmpegStreamer != null) {
 var success = await ffmpegStreamer!.writeVideoFrame(
 image,
 streamUrl,
 width: image.width,
 height: image.height,
 frameRate: 30,
 vcodec: Codec.MPEG4,
 );
 if (!success) {
 print("Failed to write video frame to stream.");
 }
 }
 });
 }

 Future<void> stopStream() async {
 await cameraController.stopImageStream();
 if (ffmpegStreamer != null) {
 await ffmpegStreamer!.close();
 ffmpegStreamer = null;
 }
 }

 @override
 void dispose() {
 cameraController.dispose();
 super.dispose();
 }

 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 home: Scaffold(
 body: Center(
 child: Column(
 mainAxisAlignment: MainAxisAlignment.center,
 children: <widget>[
 ElevatedButton(
 onPressed: startStream,
 child: Text("Start Stream"),
 ),
 ElevatedButton(
 onPressed: stopStream,
 child: Text("Stop Stream"),
 ),
 ],
 ),
 ),
 ),
 );
 }
}

</widget></void></void></void></cameradescription></myapp>

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Ffmpeg : How to fix error "Please choose an encoder manually" ?
9 juillet 2023, par AlexI am trying to convert a x265 videofile to a x264 format so it can be played on a television. I am trying the following command


ffmpeg -i input.mkv -f mp4 -vcodec libx264 -preset fast -profile:v main -acodec aac -map 0:0 -map 0:1 -map 0:2 test.mp4


to select videos stream 0:0 for video, stream 0:1 for audio and stream 0:2 for the subtitle. However I get an error


Automatic encoder selection failed Default encoder for format mp4 (codec none) is probably disabled. Please choose an encoder manually.
Error selecting an encoder


How to fix this command ?


P.S. I am not an expert in
ffmpegor videos conversion/formats/encodings/audio formats/subtitle formats.

I found EXACTLY ONE google search result with the exact error phrase HERE. And that is not helping as I do not even understand the first sentence.


Below is the output for the first three streams :


Input #0, matroska,webm, from 'input.mkv':
 Metadata:
 creation_time : 2021-03-25T09:13:20.000000Z
 ENCODER : Lavf58.29.100
 Duration: 00:23:57.65, start: 0.000000, bitrate: 2103 kb/s
 Stream #0:0(jpn): Video: hevc (Main 10), yuv420p10le(tv), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn (default)
 Metadata:
 title : [Judas] x265 10b
 ENCODER : Lavc58.54.100 libx265
 BPS-eng : 1973938
 DURATION-eng : 00:23:55.017000000
 NUMBER_OF_FRAMES-eng: 34406
 NUMBER_OF_BYTES-eng: 354079423
 _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2021-03-25 09:13:20
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:1(jpn): Audio: aac (LC), 44100 Hz, stereo, fltp (default)
 Metadata:
 title : Japanese
 BPS-eng : 128000
 DURATION-eng : 00:23:55.086000000
 NUMBER_OF_FRAMES-eng: 61804
 NUMBER_OF_BYTES-eng: 22961378
 _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2021-03-25 09:13:20
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:2(eng): Subtitle: ass
 Metadata:
 title : English
 BPS-eng : 196
 DURATION-eng : 00:23:53.580000000
 NUMBER_OF_FRAMES-eng: 478
 NUMBER_OF_BYTES-eng: 35129
 _STATISTICS_WRITING_APP-eng: mkvmerge v48.0.0 ('Fortress Around Your Heart') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2021-03-25 09:13:20
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES


I found a related question HERE whose answer I do not fully understand. However, I tried the following command


ffmpeg -i input.mkv -f mp4 -vcodec libx264 -preset fast -profile:v main -acodec aac -map 0:0 -map 0:1 -map 0:2 -c:s mov_text test.mp4


but got a new error


Error initializing output stream: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height


I thought I am defining an "encoder" for output stream "#0:0" (which I think is video), namely libx264. So what else to do here ?


I tried
-acode copyand also to use-qp 0in the command line which all did not work.

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bink : align plane width to 8 when calculating bundle sizes
20 mars 2012, par Kostya Shishkovbink : align plane width to 8 when calculating bundle sizes
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