"c:\program files\ffmpeg\bin\ffmpeg.exe" -y -i %1 -ss 5 -vframes 1 -r 1 -vf scale=trunc(oh*a/2)*2:480 -f image2 %1.jpg "c:\program files\ffmpeg\bin\ffmpeg.exe" -y -i %1 -ss 3 -vframes 1 -r 1 -vf scale=trunc(oh*a/2)*2:480 -f image2 %1.jpg "c:\program files\ffmpeg\bin\ffmpeg.exe" -y -i %1 -ss 2 -vframes 1 -r 1 -vf scale=trunc(oh*a/2)*2:480 -f image2 %1.jpg "c:\program files\ffmpeg\bin\ffmpeg.exe" -y -i %1 -ss 1 -vframes 1 -r 1 -vf scale=trunc(oh*a/2)*2:480 -f image2 %1.jpg REM jpeg (screenshot at 10 seconds, but just in case of a short video - take a screenshot earlier and overwrite)
"c:\program files\ffmpeg\bin\ffmpeg.exe" -y -i %1 -vcodec libvpx -quality good -cpu-used 5 -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=trunc(oh*a/2)*2:480 -threads 0 -acodec libvorbis -f webm %1.webm "c:\program files\ffmpeg\bin\ffmpeg.exe" -y -i %1 -vcodec libx264 -pix_fmt yuv420p -vprofile high -preset fast -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=trunc(oh*a/2)*2:480 -threads 0 -acodec libvo_aacenc -b:a 128k %1.mp4 Here’s the updated batch file that I used: To solve this problem I modified the script to attempt to capture the thumbnail at the 1, 2, 3, 5 and 10 second mark – with each successful capture overwriting the last. As well, some of the videos being converted were really short, and would be finished before the 10 second mark that the thumbnail is created at. I also made some modifications so that the aspect ratio of the video was preserved and to encode the video at a lower bit rate and faster speed. Unfortunately FFmpeg has changed since the commands were published, so some slight modifications were required. Luckily John also provided some directions for encoding to these formats using FFmpeg: The client’s videos were all wmv’s, so they would need to be converted to h.264 and WebM.
For unsupported browsers it will fall back to Flash.
As long as you provide both an h.264 and WebM encoded version of the video, it will play natively on almost all browsers. I found John Dyer’s MediaElement.js to be an excellent solution for doing this. I recently added a video player to a client’s site.
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