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• what is AV_SAMPLE_FMT_FLT

  21 décembre 2020, par Golu

  SwrContext *swr_ctx = swr_alloc_set_opts(NULL,                          
                        AV_CH_LAYOUT_STEREO,
                        AV_SAMPLE_FMT_FLT,
                        sample_rate,
                        pCodecParameters->channel_layout,                                                                               
                  
                        pCodecParameters->format,
                        pCodecParameters->sample_rate,                          
                        0,
                        NULL);


  


  what exactly AV_SAMPLE_FMT_FLT is ? i already read docs but i want to know that what is float layout means in the context of Audio. How actually binary data of audio will look in that format.

  


• Firebase Function using ffmpeg successful with emulator, out of memory when deployed

  25 septembre 2024, par flyingL123

  I need some help. I have a .mov file in Firebase Storage. The file is 25 seconds long and 106 MB. I wrote a callable Firebase function that uses ffmpeg to convert the file to a .mp4 file and save it to Firebase Storage. When I test the function using the Functions emulator, it works without issue. The function returns successfully and I see the converted file appear in storage. The converted video is about 6 MB and plays correctly when dowloaded.

  


  When I deploy this function and run it in production on the exact same video file, the function fails with :

  


  


  'Memory limit of 256 MiB exceeded with 407 MiB used. Consider
increasing the memory limit, see
https://cloud.google.com/functions/docs/configuring/memory'

  


  


  As a test, I edited the function and changed its allocated memory to 1 GiB. Then I test the function again in production. Now I receive the same error :

  


  


  'Memory limit of 1024 MiB exceeded with 1029 MiB used. Consider
increasing the memory limit, see
https://cloud.google.com/functions/docs/configuring/memory'

  


  


  This is my function code :

  


  const {initializeApp} = require("firebase-admin/app");
const {onCall} = require("firebase-functions/v2/https");
const { getStorage, getDownloadURL } = require('firebase-admin/storage');

initializeApp();

exports.convertVideo = onCall((request) => {
  const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
  const ffmpeg = require('fluent-ffmpeg');
  ffmpeg.setFfmpegPath(ffmpegPath);
  const originalLocation = request.data.originalLocation;
  const convertedLocation = request.data.convertedLocation;
  const originalVideoFile = getStorage().bucket().file(originalLocation);
  const newVideoFile = getStorage().bucket().file(convertedLocation);

  return new Promise(async (resolve, reject) => {
    await originalVideoFile.download({destination: '/tmp/original'}).catch(console.error);
    
    ffmpeg('/tmp/original')
      .addOutputOptions('-movflags +frag_keyframe+separate_moof+omit_tfhd_offset+empty_moov')
      .format('mp4')
      .on('error', (err) => {
        console.log(err);
      })
      .pipe(newVideoFile.createWriteStream())
      .on('error', (err) => {
        console.log(err);
      })
      .on('close', async () => {
        fs.unlink('/tmp/original', (err) => {
          if (err) throw err;
        });
        const convertedUrl = await getDownloadURL(newVideoFile);
        resolve([convertedLocation, convertedUrl]);
      });
  });
});


  


  I am sending a test request to the Function emulator using curl :

  


  curl -d '{"data": {"originalLocation": "customer_videos/original_video.mov", "convertedLocation": "customer_videos/converted/original_video.mp4"}}' -H "Content-Type: application/json" http://127.0.0.1:5001/foo/bar/convertVideo


  


  This works correctly. I send the same request to the deployed function, and receive the out of memory error.

  


  curl -d '{"data": {"originalLocation": "customer_videos/original_video.mov", "convertedLocation": "customer_videos/converted/original_video.mp4"}}' -H "Content-Type: application/json" https://convertvideo-foobarbaz-uc.a.run.ap


  


  Can somebody please help me understand why this is happening ? I didn't think I was doing anything too memory intensive, especially since it works correctly using the emulator.

  


• Revision 4831 : on ajoute ts et mts comme documents vidéos avec des infos supp donc ...

  28 janvier 2011, par kent1 — Log

  on ajoute ts et mts comme documents vidéos avec des infos supp donc Petits ajouts également pour mieux styler les blocs de docs