Convent Video to 3gp(mobile) format

This command uses ffmpeg to convert a regular video into 3gp format thats used in mobile phones

ffmpeg -i input_video.mp4 -s 176x144 -vcodec h263 -r 25 -b 12200 -ab 12200 -ac 1 -ar 8000 output_video.3gp

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