I have an even shorter ffmpeg cheat sheet I made for myself when I couldn't find anything concise (I missed that rodrigopolo listing).
I should maybe make for ripping DVDs to x264 using mencoder, which is a way that lets you run only one command and there are no dependencies so it's easy to download. (Technically, it takes two commands; you first do a command to get a listing, and the second command that rips and encodes you specify the title from the listing.)
October 12, 2010 at 11:31 PM
Anonymous said...
Wow, what happened to my writing ability? Trying it again:
I should maybe make a cheat sheet for ripping DVDs to x264 using mencoder, because this method only requires you run a single command, and mencoder has no dependencies so it's easy to download (as opposed to lots of ripping tutorials I found which want you to download three of five different interdependent programs).
Technically, it takes two commands; you first do a command to get a listing, and the second command rips and encodes you specify the title from the listing.
Yeah, the thing I was using before I finally got ffmpeg to work was mencoder.
For example the way I extract frames from a video is :
mplayer -benchmark -nosound -vo png:z=6 %1
To do x264 multi-pass I still extract the y4m and then do passes on that.
The problem with that is then I need to interleave the audio back in and that's not reliable.
(for video codec compression testing of course I don't include audio, but it's still somewhat problematic because people get the frame timing a little off sometimes)
October 13, 2010 at 10:01 AM
I've never gotten ffmpeg to work because I could never find a win32 build with everything integrated in it properly (for the win32 build
to work easily you need to statically build in mingw, libavcodec, etc.). Anyway, I finally found one :
Automated FFmpeg Builds at arrozcru
And in particular it's got a mess of x264 presets included so you don't have to try to figure out that command line. In particular I can
now do :
echo USAGE : [in] [speed] [out]
echo speed = medium,slow,fast,slower,etc.
%FFMPEG%\bin\ffmpeg -i %1 -threads 0 -acodec copy -vcodec libx264 -fpre %FFMPEG%\presets\libx264-%2.ffpreset %3
(my latest fucking video Babel problem is that god damn Youtube doesn't offer mp4 options for many videos anymore, they are all FLV,
and my HTPC can't play FLV, so I have to convert youtubes friggle fracking frizzum).
(BTW you can also change containers sometimes by using -sameq and not specifying anything else)
Some more reference :
ffmpeg.org FFmpeg FAQ ffmpeg.org FFmpeg Documentation VideoAudio Encoding Cheat Sheet for FFmpeg Links - FFmpeg on Windows FFmpeg x264 encoding guide robert.swain
BTW any time you are trying a format change pathway it's a good idea to check sync with something like
this video
ADDENDUM : Well, as I predicted the Unicode Fuckitude on Windows command lines is coming true. FFmpeg won't open some videos with
weird characters in file names, and Youtube in fact has a bunch of videos with weird chars in their names. The simplest solution
is to run my Deunicode on your download directory periodically.
Deunicode actually still allows 8-bit characters, I might make a -ascii option to restrict it even further to just 7 bit ascii.
(8 bit characters work consistently on Windows but still have the annoying attribute that they may display differently on the CLI vs
in Explorer).
BTW the problem is not really FFMpeg , it's the fucked up Windows Console CP thing.
( see previous ).
The only way to make command line apps that work with unicode file names in Windows is to do the elaborate
"GetUnicodeFileNameFromMatch" thing in cblib that I do. So far as I know I'm the only person in the whole
world who actually does this (I guess not that many people actually use the command line in windows any more).
"10-11-10 - FFmpeg success"
3 Comments -
I have an even shorter ffmpeg cheat sheet I made for myself when I couldn't find anything concise (I missed that rodrigopolo listing).
I should maybe make for ripping DVDs to x264 using mencoder, which is a way that lets you run only one command and there are no dependencies so it's easy to download. (Technically, it takes two commands; you first do a command to get a listing, and the second command that rips and encodes you specify the title from the listing.)
October 12, 2010 at 11:31 PM
Wow, what happened to my writing ability? Trying it again:
I should maybe make a cheat sheet for ripping DVDs to x264 using mencoder, because this method only requires you run a single command, and mencoder has no dependencies so it's easy to download (as opposed to lots of ripping tutorials I found which want you to download three of five different interdependent programs).
Technically, it takes two commands; you first do a command to get a listing, and the second command rips and encodes you specify the title from the listing.
October 12, 2010 at 11:37 PM
Yeah, the thing I was using before I finally got ffmpeg to work was mencoder.
For example the way I extract frames from a video is :
mplayer -benchmark -nosound -vo png:z=6 %1
To do x264 multi-pass I still extract the y4m and then do passes on that.
The problem with that is then I need to interleave the audio back in and that's not reliable.
(for video codec compression testing of course I don't include audio, but it's still somewhat problematic because people get the frame timing a little off sometimes)
October 13, 2010 at 10:01 AM