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• ffmpeg - data is being "removed" while h264 is being processed by ffmpeg

  21 mai 2024, par Laki

  I got a file which is created based on messages coming from streaming, all of the "messages" are ending with b'h264\x00'
I got a need to

  


  

  • load the data into ffmpeg

  


  • perform some processing of the data

  


  • re-attach the data to same "messages"

  


  


  Data is loaded with ffmpeg and saved with ffmpeg - however - ffmpeg removes "part" of the data
I have simplified the process and currently I am only loading and saving the data, without any processing, but still - part of the data is being removed

  


  I have used several commands - but always, part of my data is being removed

  


  ffmpeg -i sthg3.h264  -c copy st3.h264
ffmpeg  -err_detect ignore_err -i sthg3.h264  -c copy st3.h264
ffmpeg -fflags +genpts -i sthg3.h264 -c copy st3.h264 


  


  I have created the script for calculating that

  


  file_out = 'sthg3.h264'
def split_file(input_file,chunki):
    output_files = []
    with open(input_file, 'rb') as f:
        file_number = 0
        while True:
            chunk = f.read(504096)  # Read a chunk of data
            if not chunk:  # End of file
                break
            index = chunk.find(chunki)  # Find the delimiter
            while index != -1:
                chunk = chunk[index+len(chunki):]
                file_number += 1
                index = chunk.find(chunki)  # Find the next delimiter
    return file_number

chunki = b'h264\x00'
print(split_file(file_out,chunki))
chunki = b'\x00\x01\x00'
print(split_file(file_out,chunki))
    
chunki = b'h264\x00'
#chunki = b'\x00\x00\xdc\x9e'
print(split_file('st3.h264',chunki))
chunki = b'\x00\x01\x00'
print(split_file('st3.h264',chunki))


  


  and here is the question, how to push data through ffmpeg to avoid removing data, or replace it with something that would not be removed ?

  


• java.io.IOException : Cannot run program "/data/user/0/com.voi.myapplication8/files/ffmpeg" : error=13, Permission denied

  1er avril 2024, par Harsha

  


  java.io.IOException : Cannot run program
"/data/user/0/com.voi.myapplication8/files/ffmpeg" : error=13,
Permission denied

  


  


  I am using this dependencies
implementation 'com.writingminds:FFmpegAndroid:0.3.2'

  


  


  2024-03-31 21:40:31.045 15937-16762 FFmpeg
  
com.voi.myapplication8 E Exception while trying to run :
[Ljava.lang.String ;@71d4c0f
java.io.IOException : Cannot run program
"/data/user/0/com.voi.myapplication8/files/ffmpeg" : error=13,
Permission denied
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050)
at java.lang.Runtime.exec(Runtime.java:712)
at java.lang.Runtime.exec(Runtime.java:571)
at
com.github.hiteshsondhi88.libffmpeg.ShellCommand.run(ShellCommand.java:10)
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:38)
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:10)
at android.os.AsyncTask$3.call(AsyncTask.java:394)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by : java.io.IOException : error=13, Permission denied
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.(UNIXProcess.java:133)
at java.lang.ProcessImpl.start(ProcessImpl.java:141)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
at java.lang.Runtime.exec(Runtime.java:712) 
at java.lang.Runtime.exec(Runtime.java:571) 
at
com.github.hiteshsondhi88.libffmpeg.ShellCommand.run(ShellCommand.java:10) 
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:38) 
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:10) 
at android.os.AsyncTask$3.call(AsyncTask.java:394) 
at java.util.concurrent.FutureTask.run(FutureTask.java:264) 
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305) 
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644) 
at java.lang.Thread.run(Thread.java:1012)  2024-03-31 21:40:31.045
15937-15937 FFmpeg com.voi.myapplication8
  
E Video cropping failed :

  


  


• flient-ffmpeg getting error as "ffmpeg exited with code 1 : pipe:0 : Invalid data found when processing input"

  6 avril 2023, par Abhishek Rawal

  I am trying to create API where i need to get uploaded video and create thumbnail from that video. But conditions are :

  


  

  • Video should not store on local disk

  


  • Once thumbnail is create it should not store on local disk, instead it should directly uploaded to AWS s3 bucket.

  


  


  Following is the code i am trying with :

  


  


  


  const ffmpeg = require('fluent-ffmpeg');
const stream = require('stream');

router.post('/thumbnail', upload.any(), (req, res) => {
  const videoBuffer = req.files[0].buffer;
  
  let readableVideoBuffer = new stream.PassThrough();
    readableVideoBuffer.write(videoBuffer);
    readableVideoBuffer.end()
    
  let bufferStream = new stream.PassThrough();
  
  ffmpeg(readableVideoBuffer)
    .on('filenames', function(filenames) {
      console.log('Will generate ' + filenames.join(', '))
    })
    .on('end', function() {
      console.log('Screenshots taken');
    })
    .on('error', (err) => {
      console.log(err);
    })
    .screenshots({
      count: 4,
      size: '100x100',
      timestamps: ['00:00:01.000'],
    })
    .writeToStream(bufferStream, { end: true });  /* while using this statement i am getting error */
    
    const buffers = [];
    bufferStream.on('data', function (buf) {
      buffers.push(buf);
    });
    bufferStream.on('end', function () {
      const outputBuffer = Buffer.concat(buffers);
      // use s3 bucket code here
      console.log('outputBuffer===========>', outputBuffer)
    });
})

  


  


  



  so while calling this API my app is crashing and i am getting error as :

  


  


  Error : ffmpeg exited with code 1 : pipe:0 : Invalid data found when
processing input

  


  


  Blockquote

  


  If i am not using this statement :

  


  


  .writeToStream(bufferStream, end : true ) ;

  


  


  then able to save file but in local disk, which is not required in my case.

  


  Please help me to understand what is wrong in this code, how i can resolve it.
Any type of help is appreciated.