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Sur d’autres sites (15639)

  • shell_exec returns null ffmpeg for generating video thumb image

    11 octobre 2014, par Manu

    I’m using ffmpeg for getting thumbnail image from video. Its working fine. But the shell_exec function returns null.

    My command is,

    $return=shell_exec('C:\ffmpeg\bin\ffmpeg.exe -i D:\wamp\www\test\demo.mov -f image2 -vframes 1 D:\wamp\www\test\test.jpg');
    
var_dump($return);

    Can I get the return value from this ? Kindly help me :)

  • Ffmpeg - avio_open returns AVERROR -13

    10 septembre 2021, par Tolga

    In my project, I am trying to save mp4 video from frames. I am demuxing video first and then decode and save the .mp4 file beside frames. However, this mp4 file is only playable from command line with ffplay. I am trying to play it from media player. After little bit search I found that, I need to remux it to mp4 file after encoding. The examples that I reference for my project are official ffmpeg example and leandromoreira's code. However, avio_open() parts returns -13 as error. I printed out with av_make_error_string(error, sizeof(error), response) and got Permission denied. When I look for that error in the error.h
there is no such an error defined.

    


  • lavd/v4l2 : do not fail when VIDIOC_ENUMSTD returns EINVAL without a valid match

    2 septembre 2013, par mrlika
    lavd/v4l2 : do not fail when VIDIOC_ENUMSTD returns EINVAL without a valid match

    With some (buggy) drivers, the VIDIOC_G_STD ioctl returns a std_id that cannot
    
be matched with any of the enumerated v4l2_standard structures (for example
    
std_id = 0 or std_id = 0xffffff). Do not fail when we reach the end of the
    
enumeration without a valid match.
    

    Fixes ticket #2370
    

    Note : This commit message has been modified by Giorgio Vazzana, the original
    
commit message was :
    

    "Fixed regression for mandatory VIDIOC_ENUMSTD support by v4l2"
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavdevice/v4l2.c

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