bonedome wrote:Hello
yes I noticed all my vids converted to h264 have extension .mp4 by default, if you play the vid with mplayer from the command line I get this
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Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
and if you play the same vid on the game os player it comes up as avc.
with ffmpeg you have to force it with -vcodec h264 but when I try to force it with mencoder, no can do.
if I type
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mencoder -ovc help
there's
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x264 - H.264 encoding
so why it no work I dunno.
I'm going to give that gnome thing a try see what it's like
So - what we call h.264 video has several different names.
Officially - it is:
H.264/MPEG-4 AVC. It is also known as MPEG-4 Part 10.
This is confusing because there's *another* MPEG-4 in use that's simpler. It's officially MPEG-4 part 2, but it's usually just called MPEG-4. This simpler codec is used by DivX, Xvid, 3vix, etc.
So - basically - there are two mpeg-4s. To avoid confusion, we call mpeg-4 part 2 "MPEG-4" and mpeg-4 part 10 "h.264" or "AVC".
The full chart is here:
http://en.wikipedia.org/wiki/MPEG-4#MPEG-4_partsNow - x264 is a project to reverse engineer the h.264 libraries:
http://en.wikipedia.org/wiki/X264Many free programs refer to h.264 as x264, since that's the library they're using.
Cheers,
Paul
P.S. To confuse things further, the wrapper for MPEG-4 & H.264 is usually the .mp4 file. .mp4 stands for mpeg-4, of course. mpeg-4 therefore stands for the file structure and the video codec inside. You can have other wrappers - DivX, Xvid & 3vix traditionally use AVI, and h.264 can be found inside QuickTime .mov & Matroska .mkv.