Recherche avancée

Sur d’autres sites (7280)

• How to process single segment from fragmented mp4 container ?

  14 septembre 2020, par user14258924

  I have fragmented mp4 that I stream. First the mp4 header and then individual segments that are each one GOP. It is h264 and aac encoded video that I am getting from RTMP server.

  


  I would like to process these individual segments with ffmpeg(I doubt there are other tools available). Either adjust resolution or bitrate or even transcode to vp8/9 or avi1 if needed.

  


  But it seems that ffmpeg cannot handle this because the segment has no header. So I wodner if there is a flag or set of flags for ffmpeg to be able to process these segments without the header ? I could possibly just take the raw h264 and aac packets from the RTMP and not pack it into MP4 container beforehand, if that helps - would ffmpeg be able to process these ?

  


• Uploading video to Twitter sometimes doesn't work

  22 juillet 2021, par K-s S-k

  I have a very difficult situation. I've already spent 2 days and couldn't find a solution. Project on Laravel. I want to upload videos to Twitter using the Twitter API endpoints. But sometimes I am getting this error :

  


  


  file is currently unsupported

  


  


  I did everything as recommended in the official documentation Video specifications and recommendations. I get an error when I set an audio codec is aac in my video file, despite the fact that it is recommended in the official documentation, but when I set the audio codec to mp3, the video is uploaded, but the sound quality is very poor, and sometimes there is no sound at all. Please forgive me if this is awkward to read, but I want to provide all of my code. Because I don't know how to solve this anymore and I think it might help.

  


  <?php

namespace App\Jobs;

use App\Models\PublishedContent;
use Atymic\Twitter\Facades\Twitter;
use GuzzleHttp\Client as GuzzleClient;
use GuzzleHttp\Exception\GuzzleException;
use Illuminate\Bus\Queueable;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\File;
use Illuminate\Queue\SerializesModels;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Support\Str;


class PublishToTwitter implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    /**
     * @var
     */
    protected $publishingData;

    /**
     * Create a new job instance.
     *
     * @param $publishingData
     */
    public function __construct($publishingData)
    {
        $this->publishingData = $publishingData;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        $publishingData = $this->publishingData;

        if (is_array($publishingData)) {
            $publishingResult = $this->publishing(...array_values($publishingData));
            sendNotification($publishingResult['message'], $publishingResult['status'], 'Twitter', $publishingResult['link'], $publishingData['post_name'], $publishingData['user']);
        } else {
            $scheduledData = processingScheduledPost($publishingData);
            $postName = $scheduledData['scheduleData']['post_name'];
            $postContent = $scheduledData['scheduleData']['post_content'];
            $userToken = json_decode($publishingData->user_token,true);
            $requestToken = [
                'token'  => $userToken['oauth_token'],
                'secret' => $userToken['oauth_token_secret'],
            ];
            $publishingResult = $this->publishing($scheduledData['file'], $postName, $postContent, $requestToken);
            $publishingResult['status'] && PublishedContent::add($scheduledData['craft'], $scheduledData['file'], "twitter_share");
            sendResultToUser($publishingData, $scheduledData['user'], $publishingResult['message'], $postName, $publishingResult['link'], $publishingResult['publishing_status'], $scheduledData['social_media']);
            sendNotification($publishingResult['message'], $publishingResult['status'], 'Twitter', $publishingResult['link'], $postName, $scheduledData['user']);
        }
    }

    /**
     * @param $file
     * @param $postName
     * @param $postContent
     * @param $requestToken
     * @return array
     */
    private function publishing($file, $postName, $postContent, $requestToken): array
    {
        $result = [
            'status' => false,
            'link' => null,
            'message' => 'Your content can\'t successfully published on Twitter. This file is not supported for publishing.',
            'publishing_status' => 'error'
        ];

        if ((($file->refe_type !== 'text') || $file->refe_file_path) && !checkIfFileExist($file->refe_file_path)) {
            $result['message'] = 'Missing or invalid file.';
            return $result;
        }

        $filePath = $file->refe_file_path;
        $fileSize = $file->content_length;
        $tempFileName = 'temp-' . $file->refe_file_name;
        $ext = $file->file_type;
        $mediaCategory = 'tweet_' . $file->refe_type;
        $mediaType = $file->refe_type . '/' . $ext;
        $remoteFile = file_get_contents($filePath);
        $tempFolder = public_path('/storage/uploads/temp');

        if (!file_exists($tempFolder)) {
            mkdir($tempFolder, 0777, true);
        }

        $tempFile = public_path('/storage/uploads/temp/' . $tempFileName);
        File::put($tempFile, $remoteFile);
        $convertedFileName = 'converted-' . $file->refe_file_name;
        $convertedFile = public_path('/storage/uploads/temp/' . $convertedFileName);
        $command = 'ffmpeg -y -i '.$tempFile.' -b:v 5000k -b:a 380k -c:a aac -profile:a aac_low -threads 1 '.$convertedFile.'';
        exec($command);
        @File::delete($tempFile);

        try {
            $twitter = Twitter::usingCredentials($requestToken['token'], $requestToken['secret']);
            if ($file->refe_type === 'text') {
                $twitter->postTweet([
                    'status' => urldecode($postContent),
                    'format' => 'json',
                ]);

                $result['link'] = 'https://twitter.com/home';
                $result['status'] = true;
                $result['message'] = 'Your content successfully published on Twitter. You can visit to Twitter and check it.';
                $result['publishing_status'] = 'done';
            } else if ($file->refe_type === 'video' || $file->refe_type === 'image') {
                if ($file->refe_type === 'video') {
                    $duration = getVideoDuration($file->refe_file_path);

                    if ($duration > config('constant.sharing_configs.max_video_duration.twitter')) {
                        throw new \Exception('The duration of the video file must not exceed 140 seconds.');
                    }
                }

                $isFileTypeSupported = checkPublishedFileType('twitter', $file->refe_type, strtolower($ext));
                $isFileSizeSupported = checkPublishedFileSize('twitter', $file->refe_type, $fileSize, strtolower($ext));

                if (!$isFileTypeSupported) {
                    throw new \Exception('Your content can\'t successfully published on Twitter. This file type is not supported for publishing.');
                }

                if (!$isFileSizeSupported) {
                    throw new \Exception('Your content can\'t successfully published on Twitter. The file size is exceeded.');
                }

                if ($file->refe_type === 'video') $fileSize = filesize($convertedFile);

                if (strtolower($ext) === 'gif') {
                    $initMedia = $twitter->uploadMedia([
                        'command' => 'INIT',
                        'total_bytes' => (int)$fileSize
                    ]);
                } else {
                    $initMedia = $twitter->uploadMedia([
                        'command' => 'INIT',
                        'media_type' => $mediaType,
                        'media_category' => $mediaCategory,
                        'total_bytes' => (int)$fileSize
                    ]);
                }

                $mediaId = (int)$initMedia->media_id_string;

                $fp = fopen($convertedFile, 'r');
                $segmentId = 0;

                while (!feof($fp)) {
                    $chunk = fread($fp, 1048576);

                    $twitter->uploadMedia([
                        'media_data' => base64_encode($chunk),
                        'command' => 'APPEND',
                        'segment_index' => $segmentId,
                        'media_id' => $mediaId
                    ]);

                    $segmentId++;
                }

                fclose($fp);

                $twitter->uploadMedia([
                    'command' => 'FINALIZE',
                    'media_id' => $mediaId
                ]);

                if ($file->refe_type === 'video') {
                    $waits = 0;

                    while ($waits <= 4) {
                        // Authorizing header for Twitter API
                        $oauth = [
                            'command' => 'STATUS',
                            'media_id' => $mediaId,
                            'oauth_consumer_key' => config('twitter.consumer_key'),
                            'oauth_nonce' => Str::random(42),
                            'oauth_signature_method' => 'HMAC-SHA1',
                            'oauth_timestamp' => time(),
                            'oauth_token' => $requestToken['token'],
                            'oauth_version' => '1.0'
                        ];

                        // Generate an OAuth 1.0a HMAC-SHA1 signature for an HTTP request
                        $baseInfo = $this->buildBaseString('https://upload.twitter.com/1.1/media/upload.json', 'GET', $oauth);
                        // Getting a signing key
                        $compositeKey = rawurlencode(config('twitter.consumer_secret')) . '&' . rawurlencode($requestToken['secret']);
                        // Calculating the signature
                        $oauthSignature = base64_encode(hash_hmac('sha1', $baseInfo, $compositeKey, true));
                        $oauth['oauth_signature'] = $oauthSignature;
                        $headers['Authorization'] = $this->buildAuthorizationHeader($oauth);

                        try {
                            $guzzle = new GuzzleClient([
                                'headers' => $headers
                            ]);
                            $response = $guzzle->request( 'GET', 'https://upload.twitter.com/1.1/media/upload.json?command=STATUS&media_id=' . $mediaId);
                            $uploadStatus = json_decode($response->getBody()->getContents());
                        } catch (\Exception | GuzzleException $e) {
                            dd($e->getMessage(), $e->getLine(), $e->getFile());
                        }

                        if (isset($uploadStatus->processing_info->state)) {
                            switch ($uploadStatus->processing_info->state) {
                                case 'succeeded':
                                    $waits = 5; // break out of the while loop
                                    break;
                                case 'failed':
                                    File::delete($tempFile);
                                    Log::error('File processing failed: ' . $uploadStatus->processing_info->error->message);
                                    throw new \Exception('File processing failed: ' . $uploadStatus->processing_info->error->message);
                                default:
                                    sleep($uploadStatus->processing_info->check_after_secs);
                                    $waits++;
                            }
                        } else {
                            throw new \Exception('There was an unknown error uploading your file');
                        }
                    }
                }

                $twitter->postTweet(['status' => urldecode($postContent), 'media_ids' => $initMedia->media_id_string]);
                @File::delete($convertedFile);
                $result['link'] = 'https://twitter.com/home';
                $result['status'] = true;
                $result['message'] = 'Your content successfully published on Twitter. You can visit to Twitter and check it.';
                $result['publishing_status'] = 'done';
            }
        } catch (\Exception $e) {
            dd($e->getMessage());
            $result['message'] = $e->getMessage();
            return $result;
        }

        return $result;
    }

    /**
     * @param $baseURI
     * @param $method
     * @param $params
     * @return string
     *
     * Creating the signature base string
     */
    protected function buildBaseString($baseURI, $method, $params): string
    {
        $r = array();
        ksort($params);
        foreach($params as $key=>$value){
            $r[] = "$key=" . rawurlencode($value);
        }
        return $method . "&" . rawurlencode($baseURI) . '&' . rawurlencode(implode('&', $r));
    }

    /**
     * @param $oauth
     * @return string
     *
     * Collecting parameters
     */
    protected function buildAuthorizationHeader($oauth): string
    {
        $r = 'OAuth ';
        $values = array();
        foreach($oauth as $key=>$value)
            $values[] = "$key=\"" . rawurlencode($value) . "\"";
        $r .= implode(', ', $values);
        return $r;
    }
}



  


  I would be very grateful if someone would help me.

  


• Availability of WebM (VP8) Video Hardware IP Designs

  10 janvier 2011, par noreply@blogger.com (John Luther)

  Hello from the frigid city of Oulu, in the far north of Finland. Our WebM hardware development team, formerly part of On2 Technologies, is now up-to-speed and working hard on a number of video efforts for WebM.
  

  • VP8 (the video codec used in WebM) hardware decoder IP is available from Google for semiconductor companies who want to support high-quality WebM playback in their chipsets.
  • The Oulu team will release the first VP8 video hardware encoder IP in the first quarter of 2011. We have the IP running in an FPGA environment, and rigorous testing is underway. Once all features have been tested and implemented, the encoder will be launched as well.

  WebM video hardware IPs are implemented and delivered as RTL (VHDL/Verilog) source code, which is a register-level hardware description language for creating digital circuit designs. The code is based on the Hantro brand video IP from On2, which has been successfully deployed by numerous chipset companies around the world. Our designs support VP8 up to 1080p resolution and can run 30 or 60fps, depending on the foundry process and hardware clock frequency.

  The WebM/VP8 hardware decoder implementation has already been licensed to over twenty partners and is proven in silicon. We expect the first commercial chips to integrate our VP8 decoder IP to be available in the first quarter of 2011. For example, Chinese semiconductor maker Rockchip last week demonstrated full WebM hardware playback on their new RK29xx series processor at CES in Las Vegas (video below).
  

  
  Note : To view the video in WebM format, ensure that you’ve enrolled in the YouTube HTML5 trial and are using a WebM-compatible browser. You can also view the video on YouTube.

  Hardware implementations of the VP8 encoder also bring exciting possibilities for WebM in portable devices. Not only can hardware-accelerated devices play high-quality WebM content, but hardware encoding also enables high-resolution, real-time video communications apps on the same devices. For example, when VP8 video encoding is fully off-loaded to a hardware accelerator, you can run 720p or even 1080p video conferencing at full framerate on a portable device with minimal battery use.

  The WebM hardware video IP team will be focusing on further developing the VP8 hardware designs while also helping our semiconductor partners to implement WebM video compression in their chipsets. If you have any questions, please visit our Hardware page.

  Happy New Year to the WebM community !

  Jani Huoponen, Product Manager
  Aki Kuusela, Engineering Manager