About PNaCL ffmpeg
ffmpeg is opensource video converter. This is PNaCL Version. Support codec is libx264,libx265,libvpx(VP8,VP9).
PNaCL is Portable Version of Native Client developed by Google. Native Client is program code that run on virtual pc created by Browser. Important thing,this virtual pc is sandbox. And therefore,we can run program code which is downloaded in internet, safely.
Google Chrome 49 or later.
Reset storage for this site(Only Chrome)
(1) address bar chrome://settings/cookies
How to use
Input ffmpeg option and Drag & Drop video file. Input file is infile. Output file must be last option. You don't select /dev/null. You can only do single process. If success, you can download by download button. Even if ffmpeg error end with exit code 0,Status is Success! You may check ffmpeg output message. After download, you may remove infile and output file by click 'Delete /tmp'. If you convert again at same file, you don't click 'Delete /tmp' and click 'Back' and input option and click 'Skip'.
Now, not support libx264
After pass 1 encode,click 'Back' and input option (maybe -pass 2) and click 'Skip'. You don't use -passlogfile.
Enable -stats option, you can get Time messge. It's useful. If you want -stats message, remove check for 'Disable -stats message'.
file format tester
Use ffprobe command.here
ffmpeg version 3.0.1
Status remain Loading
How to make video for Browser(IE,FireFox,Chrome)
Use Sample Video(3min 23sec.).
Use Sample Video(6 Sec.).