[FFmpeg-user] rotating an mp4

[Michael Bradshaw]

On Fri, Jun 29, 2012 at 1:43 PM, Michael Makuch <mike8 at makuch.org> wrote:
> $ ffmpeg -codecs 2>&1 | grep h264
>  D V D B h264            H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10

When you do ffmpeg -codecs, there's a key that's printed at the top. D
= decoding supported, E = encoding supported. The h264 codec can
decode but not encode.

If you want to encode with ffmpeg, you need to build it with libx264
and pass "-vcodec libx264"

--Michael