No accelerated colorspace conversion found from yuv420p to bgr8. Incompatible pixel format 'yuv420p' for codec 'gif', auto-selecting format 'pal8' Input #0, matroska,webm, from 'input.webm':ĭuration: N/A, start: 0.000000, bitrate: N/A Warning: not compiled with thread support, using thread emulation Here is ffmpeg console output: ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developersīuilt on 20:01:41 with emcc (Emscripten GCC-like replacement) 1.12.0 (commit 6960d2296299e96d43e694806f5d35799ef8d39c)Ĭonfiguration: -cc=emcc -prefix=/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/./dist -enable-cross-compile -target-os=none -arch=x86_32 -cpu=generic -disable-ffplay -disable-ffprobe -disable-ffserver -disable-asm -disable-doc -disable-devices -disable-pthreads -disable-w32threads -disable-network -disable-hwaccels -disable-parsers -disable-bsfs -disable-debug -disable-protocols -disable-indevs -disable-outdevs -enable-protocol=file Try uploading a gif, video, or picture instead.'. However when I open a new tab, go to twitter, click the photo icon, clicking upload instantly gives me error 'That kind of file isn't supported yet.

I use yuv420p as that is what this topic says for twitter. ffmpeg -f input.webm -pix_fmt yuv420p -strict -2 output.mp4

Try uploading a gif, video, or picture instead.

I have created a screencast, it was saved as webm.

Twitter video converter mp4