ffmpeg convert gif to mp4, for best cross browser compatibility

gistfile1.txt

### Full command line options

```
ffmpeg -f gif -i FOO.gif -pix_fmt yuv420p -c:v libx264 -movflags +faststart -filter:v crop='floor(in_w/2)*2:floor(in_h/2)*2' BAR.mp4
```

### Notie

 * output mp4 is encoded with h264, support Firefox/Chrome/Safari in Windows, Mac OSX, Android, and iOS.
 * one mp4 file for all platforms, there is no need to encode an extra `webm` movie, which encoding speed is pretty slow.
 * format as `yuv420p` for Firefox compatibility, the downside is color becomes less-saturate than original gif.
 * yuv420p only support even width/height, so crop filter is required
 * `-movflags +faststart` flags are optimized for online view in browser
 * compression ratio typically 10:1, pretty awesome. note that if original gif is < 512KB, convert as mp4 is less efficient.

### Obtain static binary ffmpeg

 * http://johnvansickle.com/ffmpeg/
 
 

Thanks for the gist! 👍
I have one question: how to fit video to needed size?

hello !
i need to convert a 25 minutes video into multiple gifs, each gif duration shoud be 4 second.
please help

Here is a function to convert all of gif on current directory to mp4.

giftomp4(){
  : copy all of gif on current dir to mp4
  for i in *.gif; do ffmpeg -f gif -i "$i" -pix_fmt yuv420p -c:v libx264 -movflags +faststart -filter:v crop='floor(in_w/2)*2:floor(in_h/2)*2' "$(basename "${i%.*}").mp4" ; done
}

Thanks for this 👍 .

Btw what does :v means in:

• -c:v libx264 and
• -filter:v crop='floor(in_w/2)*2:floor(in_h/2)*2'?

Thanks for this 👍 .

Btw what does :v means in:

• -c:v libx264 and
• -filter:v crop='floor(in_w/2)*2:floor(in_h/2)*2'?

:v apply to video stream. :a is for audio

Thanks for this +1 .
Btw what does :v means in:

• -c:v libx264 and
• -filter:v crop='floor(in_w/2)*2:floor(in_h/2)*2'?

:v apply to video stream. :a is for audio

Thx @ingram90

Thx! You save my time 👍