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Sur d’autres sites (5478)

  • Can't set ffmpeg header when using file for input

    20 janvier 2019, par Dane Jordan

    I’m attempting to set headers (as suggested here) for my ffmpeg concat command like so :

    ffmpeg \
    
    -f concat \
    
    -safe 0 \
    
    -protocol_whitelist file,http,https,tcp,tls \
    
    -headers $'Content-Type: audio/wav\r\n' \
    
    -i 'inputs.txt' \
    
    -c 'copy' 'output.wav' \
    
    -v trace

    where my input file is structured as such :

    file 'https://path/to/file1'
    
file 'https://path/to/file2'
    
file 'https://path/to/file3'

    However, when I run the command, ffmpeg doesn’t set the headers, as seen by the output of -v :

    [http @ 0x7fa133d01080] request: GET / HTTP/1.1
    
User-Agent: Lavf/58.20.100
    
Accept: */*
    
Range: bytes=0-
    
Connection: close
    
Host: localhost:3001
    
Icy-MetaData: 1

    What’s strange is if I set my input not through an input txt and just through -i /path/to file (as seen below) it works just fine.

    ffmpeg \
    
    -f concat \
    
    -safe 0 \
    
    -protocol_whitelist file,http,https,tcp,tls \
    
    -headers $'Content-Type: audio/wav\r\n' \
    
    -i 'https://google.com' \
    
    -c 'copy' 'output.wav' \
    
    -v trace

    Output of -v :

    [https @ 0x7fed3ac03940] request: GET / HTTP/1.1
    
User-Agent: Lavf/58.20.100
    
Accept: */*
    
Range: bytes=0-
    
Connection: close
    
Host: google.com
    
Icy-MetaData: 1
    
Content-Type: audio/wav

    Not sure why reading the inputs through a file would affect the headers getting sent. For now the workaround is to use a string concatenating all of the inputs (a bit messier than I’d like), but I’m curious if anyone might know why this is happening.

    UPDATE : According to this post I have to read inputs through a text file, so I’m back to square one....

  • what is the byte structuture of ffmpeg rawvideo file

    30 décembre 2022, par porente

    after creating a file using ffmpeg -i video.mp4 -vcodec rawvideo -pix_fmt rgb0 out.raw
    
I want to open out.raw file in binary and read some pixels in my C code
    
so what is the byte structuture or format of that out.raw file ?
    
for example the byte structure or format of sound.wav file is https://www.researchgate.net/publication/265163681/figure/fig1/AS:651531422560256@1532348604142/The-structure-of-wav-file-format.png

    


  • ffmpeg scale command working but produces 0kb output file [closed]

    1er mai 2023, par Taj Ahmed

    When i am using following command to scale the video mkv file using ffmpeg. command is working fine with no errors produced but output file is coming as 0kb file. unable to find the solution on internet. Any help will be welcome.

    


    command used to scale:
sudo ffmpeg -y -i input.mkv -vf scale=540:540 -preset slow -crf 18  $output.mkv


    


    Then input file is a combined mkv generated from the janus-gateway recording plugin

    


    Link to log file : https://textdoc.co/wrpsgHxRNaGQUAW0

    


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