CODEWITHSUNDEEP
linuxbashshellvideoffmpeg
Sat Sam
Sat Sam

Reputation: 31

Bash Shell Script Remote Background Processing

I Have Created a Bash Shell script.. With that i can crop and convert video locally..

nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt &
PID1=$!
nohup ffmpeg -i "$c2" -vf "$crop_value2" -b 1800k "/home/Cropped/""$name2"_cropped.mp4"" > crop2.txt &
PID2=$!
nohup ffmpeg -i "$c3" -vf "$crop_value3" -b 1800k "/home/Cropped/""$name3"_cropped.mp4"" > crop3.txt &
PID3=$!
nohup ffmpeg -i "$c4" -vf "$crop_value4" -b 1800k "/home/Cropped/""$name4"_cropped.mp4"" > crop4.txt &
PID4=$!
wait $PID1
wait $PID2
wait $PID3
wait $PID4

As Above Code Shows Im Using 4 Conversion In background In Local Server And I'm Using Wait PID To Check Whether Conversation Finished Or Not.

My Problem Is Its taking very late to Convert.. So I Thinking Of Converting One Conversion In Local Sever And Another Three In Different Remote Server Through SSH Example:

ssh [email protected] "nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt &"

My Problem Is After Executing Remote Commands How Can I Get Remote PID And Use PID Wait Option For All Remote Connection.

Upvotes: 0

Views: 152

Answers (1)

Barmar
Barmar

Reputation: 781761

Put the ssh command in the background, not the remote command:

ssh [email protected] "nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k \
    "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt" &
PID1=$!

BTW, you don't need a wait command for each background process. If you run wait with no argument, it waits for all background processes.

Upvotes: 1

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