ffmpeg - nginx +unicorn+rails+"upstream prematurely closed connection while reading response header from upstream" 502 bad gateway error -


i've been scratching head on 502 gateway error while converting video(approx 10mb) using ffmpeg. files of less 2mb works fine when try upload + convert using webrick ,it works fine. have client_max_body_size 1g set.

for testing purpose have added these in nginx conf file

proxy_connect_timeout 600s;     proxy_send_timeout    600s;     proxy_read_timeout    600s;     send_timeout          600s;      proxy_buffer_size           32k;     proxy_buffers               4 32k;     proxy_busy_buffers_size     32k;     proxy_temp_file_write_size  32k;      fastcgi_buffers 8 16k;     fastcgi_buffer_size 32k;       timeout unicorn set  timeout 300 , in unicorn.rb

please help.


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