php exec ffmpeg how to get errors

Question

when i run

exec("ffmpeg -i $flv -y -f mjpeg -ss 00:00:05 -s 120x90 -vframes 1 -an thumb.jpg",$error);

$error return's empty value but when i run this command using cron job this one send a notification email to me which contain informations like

FFmpeg version 0.5.2, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC --enable-avfilter --enable-avfilter-lavf --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 1 / 52.20. 1 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Jun 13 2010 23:44:18, gcc: 4.1.2 20080704 (Red Hat 4.1.2-48)

I need to be able to get those errors in php so i can know if the thumb was created or not

Thanks.

how to do error handling in ffmpeg ?

Hitesh
– Hitesh

2014-11-28 09:47:33 +00:00
Commented Nov 28, 2014 at 9:47 — Hitesh
– Hitesh, Commented Nov 28, 2014 at 9:47

Elle H · Accepted Answer · 2010-07-17 17:59:06Z

5

Redirect the output with 2>&1

exec("ffmpeg -i $flv -y -f mjpeg -ss 00:00:05 -s 120x90 -vframes 1 -an thumb.jpg 2>&1",$error);

answered Jul 17, 2010 at 17:59

Elle H

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1 Comment

thvs86 Over a year ago

I know this is an old question but I always find it useful to also get the FFMPEG report when running some command. Therefor I use something like this: $cmd = 'ffmpeg -i ' . $task . $codec . $path . ' -report -hide_banner -loglevel error 2>&1'; $r = exec($cmd, $errors); where -report generates an extensive report in the root directory. For bigger projects I always throw in a logging system like: $log = file_put_contents($logFile, $cmd . PHP_EOL , FILE_APPEND | LOCK_EX); just to have everything in one place and commented nicely.

Leo · Accepted Answer · 2016-03-20 00:00:59Z

2

Building on top of Mauro's answer. A clean way to detect errors will be adding the following options -hide_banner and -loglevel error.

exec("ffmpeg -i $flv -y -f mjpeg -ss 00:00:05 -s 120x90 -vframes 1 -an thumb.jpg -hide_banner -loglevel error 2>&1", $errors);

exec() will always assign an array of strings to the second parameter in this case $errors, each element corresponding to a different error, so you can simply print or handle each error using a loop:

foreach($errors as $next) {
    //handle error
    echo $next;
}

answered Mar 20, 2016 at 0:00

Leo

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Community · Accepted Answer · 2020-06-20 09:12:55Z

1

This answer comes almost 6 year after question, but newer versions have an option -hide_banner.

From man page

-hide_banner

Suppress printing banner.

All FFmpeg tools will normally show a copyright notice, build options and library versions. This option can be used to suppress printing this information.

Also you can use the option -loglevel to define what kind of message (errors, warning, info, debug) would you want to show.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Jan 22, 2016 at 13:10

Mauro Baraldi

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