how do i convert an MP4 file to 3GP? i want to make my video look straight from a very old nokia, with the quality totally screwed up and pixelated, like the image that is in my post.

i tried using the classic windows xp "video to video" app, but i have no knowledge of old mobiles, i wanted to know which of those old mobiles leave the audio and video quality completely fucked up.

>>105701330 (OP)
Install ffmpeg and try this:
ffmpeg -i input.mp4 -vf "scale=176:144" -r 12 -b:v 80k -vcodec h263 -acodec amr_nb -ar 8000 -ac 1 -ab 12.2k -f 3gp output.3gp

You will need to mess up with the contrast too, at least. I was about to advise you to use Avidemux but it doesn't seem to be able to export as 3GP.

(You should try to find a real old Nokia and shoot videos with it.)

>>105701358
thank you it works.

>>105701542
no problem. If you want to tweak the parameters, here's what they do:
VIDEO:
-vf "scale=176:144": Resize video to 176x144 pixels
-r 12: Set frame rate to 12 frames per sec
-b:v 80k: video bitrate to 80 kilobits per sec
-vcodec h263: old coded used on old phones (also compatible w/ old devides)

AUDIO:
-acodec amr_nb: Use AMR-NB codec (common for 3gp)
-ar 8000: 8000Hz sample rate
-ac 1: mono channel
-ab 12.2k: audio bitrate to 12.2 kilobits / sec

>>105701330 (OP)
You could just compress the bitrate o both audio and video?