Encoding to x264 using ffmpeg

[Marcelo Magno T. Sales]

Em quarta-feira 15 setembro 2010, Rashkae escreveu:
> Marcelo Magno T. Sales wrote:
> > Hello,
> > 
> > When I was running Karmic, I would encode a video to x264 running
> > ffmpeg as follows:
> > ffmpeg -i inputfile.ext -vcodec libx264 -acodec libfaac -sameq -s
> > 854x480 -aspect 1.78 outputfile.mp4
> > 
> > It used to work great. However, when I use this very same command
> > line in lucid, I get this error message:
> > 
> > [libx264 @ 0xc28200]broken ffmpeg default settings detected
> > [libx264 @ 0xc28200]use an encoding preset (vpre)
> > Error while opening codec for output stream #0.0 - maybe incorrect
> > parameters such as bit_rate, rate, width or height
> > 
> > I found some preset files in /usr/share/ffmpeg. If I use one of
> > them with the -vpre switch, ffmpeg runs without complaining, but
> > with none of these preset files I get results comparable with what
> > I was used to in Karmic. For example, if I run ffmpeg with -vpre
> > default, I get a very tiny file with horrible quality. If I use
> > -vpre lossless_slower, I get a file with good quality, but with a
> > size 7 to 10 times the original (in Karmic, I would get a file
> > smaller than the original). And so on. I've read some ffmpeg
> > encoding tutorials, but so far I'm still unable to generate video
> > files with acceptable quality and sizes.
> > 
> > Any suggestions?
> > 
> > Thanks,
> > 
> > Marcelo
> 
> Get handbrake.. unless you're *really* married to the idea of
> wrestling with ffmpeg directly.

Thanks for your suggestion. However, I need a tool that allows me to do 
batch conversions, because I have dozens of videos that I need to 
convert to x264.

[]'s
Marcelo