php running multiple ffmpeg command

Question

I want to convert video files into different resolution using ffmpeg. Right now i can run only 1 ffmpeg command the 2nd ffmpeg command does not get execute.

shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -y -i \"$target_file\" -c:v libx264 -s:v 854x480 -c:a copy \"{$newFileName}\" > logfile.txt 2>&1");
shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -y -i \"$target_file\" -c:v libx264 -s:v 480x360 -c:a copy \"{$360FileName}\" > logfile.txt 2>&1");

how can i code the script so that it can compress the video into various different resolution such as 240p, 360p, 480p?

Edited code to output 3 video files?

shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -y -i \"$target_file\" -map 0 -c:v libx264 -s:v 854x480 -c:a copy \"{$newFileName}\" -map 0 -c:v libx264 -s:v 480x360 -c:a copy \"{$new360pFileName}\" -map 0 -c:v libx264 -s:v 854x480 -c:a copy \"{$240pFileName}\"   > logfile.txt 2>&1");

Gyan · Accepted Answer · 2016-03-09 05:42:57Z

1

You can outputs together, like this

shell_exec("C:\\ffmpeg\\bin\\ffmpeg.exe -y -i \"$target_file\" -map 0 -c:v libx264 -s:v 854x480 -c:a copy \"{$newFileName}\" -map 0 -c:v libx264 -s:v 480x360 -c:a copy \"{$360FileName}\" > logfile.txt 2>&1");

answered Mar 9, 2016 at 5:42

Gyan

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2 Comments

Mick Jack Over a year ago

what does -map 0 mean? if i wish to add more video resolution i need to add the command after -map 0? refer to my updated code above.

Gyan Over a year ago

-map 0 means process all streams in input. Not strictly necessary, but safer to put it. For each new resolution, start with -map 0.Check your scale values. For the 240p outout, you have scaled to 854x480.

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