i am using ffmpeg to extract clip from mp4 video,

i tried with "-acodec copy -vcodec copy" and "-sameq"

in both, aspect ration of generated file is changed.

( ffmpeg -sameq -i "input file" "output file"

 ffmpeg -i "input file" -acodec copy -vcodec copy "outputfile"

)

source file is of aspect ratio sar=4:3 dar=4:3

new file is has aspect ratio sar=4:3 dar=1:1

please help me to solve this problem,

one weird thing is when i see details in another video tool, it shows me sar=4:3 dar=4:3 of source video

but when i use command ffmpeg -i sourcefile, it shows me sar=300:400 dar=1:1

thanks vishal parekh