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• FFmpeg drawtext not working on filter complex with watermark on php

  14 octobre 2018, par Groovekingg

  After I made a question of this topic i got a great answer from LordNeckbeard and appreciate for the help, but still the drawtext isn’t working, and can’t figure out what could possibly be wrong. So everything works if I omit drawtext=text=’hello’ on both of these lines, but once i add drawtext, no output.gif is created.

  $cmd1 = "$ffmpeg -ss 00:00:02 -t 00:00:02 -i $file_full_path -i $watermark -filter_complex '[0]fps=15,scale=200:113:flags=lanczos[bg];[bg][1]overlay=5:5,drawtext=text='hello',palettegen' $palette";
  
  $cmd2 = "$ffmpeg -ss 00:00:02 -t 00:00:02 -i $file_full_path -i $watermark -i $palette -filter_complex '[0]fps=15,scale=200:113:flags=lanczos[bg];[bg][1]overlay=5:5,drawtext=text='hello'[x];[x][2]paletteuse=dither=bayer:bayer_scale=3' -loop -1 output.gif";
  
  shell_exec($cmd1);
  
  shell_exec($cmd2);

  i have tried changing the single quotation marks to double, but nothing change. Also tried with exec(). Or is it possible that my server has a library missing and drawtext isn’t working because of this ?
  So I have tried to break down to check where it is wrong by simplifying the cmd to :

  $cmd1 = "$ffmpeg -i $file_full_path -ss 00:00:02 -t 00:00:02 -r 20 -vf scale=200:113,drawtext=text='hello' output.gif";

  and an output.gif file is created but 0bytes. what could it be ?

  Thanks to LordNeckbeard again for his answered on my previous post. Any answer would be of great help.

• Error loading trimmed video produced by FFMPEG

  12 mai 2024, par Bryan Carty

  I've been trying to trim a video using FFMPEG within some javascript code.

  


  The code executes without throwing any errors.

  


    try {
    const command = `ffmpeg -i ${
      CROPPING_DIR + CROPPED_VIDEO_PREFIX + id + ".mp4"
    } -ss 00:00:04 -to 00:00:06 -c copy ${
      CROPPING_DIR + TRIMMED_VIDEO_PREFIX + id + ".mp4"
    }`;
    console.log(command);
    const { stdout, stderr } = await exec(command);
    return "NA";
  } catch (error) {
    console.error("Error executing ffmpeg command:", error);
  }


  


  In VsCode, I am unable to view the trimmed video. Instead I see 'An error occurred while loading the video file'.

  


  Viewing from the file explorer, no video frames are displayed, but I can see the video progress bar moving.

  


  I've attempted a number of FFMPEG commands but am getting the same result.

  


  ffmpeg -i C:/Users/bryan/Desktop/Other/project/code/project/app/cropping_images/_cropped_d372d8ff-84c8-4cab-9359-513ee6ad7536.mp4 -ss 00:00:04 -to 00:00:06 -c copy C:/Users/bryan/Desktop/Other/project/code/project/app/cropping_images/_trimmed_d372d8ff-84c8-4cab-9359-513ee6ad7536.mp4

ffmpeg -i C:/Users/bryan/Desktop/Other/project/code/project/app/cropping_images/_cropped_87f094f2-b06f-4c21-bd41-ae5e4ca222ae.mp4 -ss 1.05 -to 2.45 -c copy C:/Users/bryan/Desktop/Other/project/code/project/app/cropping_images/_trimmed_87f094f2-b06f-4c21-bd41-ae5e4ca222ae.mp4

ffmpeg -i C:/Users/bryan/Desktop/Other/project/code/project/app/cropping_images/_cropped_f5b89e96-3efc-4a6e-bba4-428751fb38eb.mp4 -ss 0.00 -to 6.93 -c:v copy -c:a copy C:/Users/bryan/Desktop/Other/project/code/project/app/cropping_images/_trimmed_f5b89e96-3efc-4a6e-bba4-428751fb38eb.mp4


  


• Cloud Functions for Firebase : completing long processes without touching maximum timeout

  17 février, par Scott Ewing

  I have to transcode videos from webm to mp4 when they're uploaded to firebase storage. I have a code demo here that works, but if the uploaded video is too large, firebase functions will time out on me before the conversion is finished. I know it's possible to increase the timeout limit for the function, but that seems messy, since I can't ever confirm the process will take less time than the timeout limit.

  



  Is there some way to stop firebase from timing out without just increasing the maximum timeout limit ?

  



  If not, is there a way to complete time consuming processes (like video conversion) while still having each process start using firebase function triggers ?

  



  If even completing time consuming processes using firebase functions isn't something that really exists, is there some way to speed up the conversion of fluent-ffmpeg without touching the quality that much ? (I realize this part is a lot to ask. I plan on lowering the quality if I absolutely have to, as the reason webms are being converted to mp4 is for IOS devices)

  



  For reference, here's the main portion of the demo I mentioned. As I said before, the full code can be seen here, but this section of the code copied over is the part that creates the Promise that makes sure the transcoding finishes. The full code is only 70 something lines, so it should be relatively easy to go through if needed.

  



  const functions = require('firebase-functions');
const mkdirp = require('mkdirp-promise');
const gcs = require('@google-cloud/storage')();
const Promise = require('bluebird');
const ffmpeg = require('fluent-ffmpeg');
const ffmpeg_static = require('ffmpeg-static');


  



  (There's a bunch of text parsing code here, followed by this next chunk of code inside an onChange event)

  



  function promisifyCommand (command) {
    return new Promise( (cb) => {
        command
        .on( 'end',   ()      => { cb(null)  } )
        .on( 'error', (error) => { cb(error) } )
        .run();
    })
}
return mkdirp(tempLocalDir).then(() => {
    console.log('Directory Created')
    //Download item from bucket
    const bucket = gcs.bucket(object.bucket);
    return bucket.file(filePath).download({destination: tempLocalFile}).then(() => {
      console.log('file downloaded to convert. Location:', tempLocalFile)
      cmd = ffmpeg({source:tempLocalFile})
               .setFfmpegPath(ffmpeg_static.path)
               .inputFormat(fileExtension)
               .output(tempLocalMP4File)
      cmd = promisifyCommand(cmd)
      return cmd.then(() => {
        //Getting here takes forever, because video transcoding takes forever!
        console.log('mp4 created at ', tempLocalMP4File)
        return bucket.upload(tempLocalMP4File, {
            destination: MP4FilePath
        }).then(() => {
          console.log('mp4 uploaded at', filePath);
        });
      })
    });
  });