Rockbox General > Rockbox General Discussion

Sansa Fuze+

<< < (3/3)

FCB38:
I'm trying to find the best way to encode mpeg-2 videos for Fuze+.
Mpeg-2 is less powerfull than avc. That's why I want to tune the mpeg-2 encoder to have best ration weight/quality.
I want to understand what do you mean by: "MpegPlayer does not scale the output at all.".
Does it mean that mpegplayer display only square pixels?
I want to crop some video in cinemascope format 2,55:1) and I want to keep the good aspect ratio. It's not so easy.

Regards.

Julian67:
You can't really see any quality benefit with high quality settings on such a small screen.  For example over about 400k video bitrate there is no visible change, only a bigger file size.  Even making AVC for use in original firmware won't give you a file that also looks high quality on a normal laptop/PC/TV screen.

When encoding for devices which can't scale or expand the picture according to aspect ratio it is much simpler and easier to use Mencoder than ffmpeg.  I wrote a script to use in Debian that will work equally well in any Linux or BSD or OS X or similar, so long as you have bash shell, MPlayer and Mencoder.  If you are using Windows bits of it might be useful in configuring a Mencoder GUI.

Brief summary from the script:


--- Code: ---# This script encodes video for playback on Rockboxed players.  It
# automatically detects and applies good crop values.  It automatically
# scales the video to a suitable size.  It detects the audio type in the
# source video and transcodes it only if necessary.  There are options
# to make sample encodes (tests), to specify output directory, to
# disable autocropping and to choose higher quality encoding.
# Run the script with no options or arguments for some short
# instructions & read the comments at the end of the script.
--- End code ---

The script can be found at http://pastebin.com/Vp3fTdBu

I have to admit that I rarely use it because the Fuze+ and other Rockboxed players don't hold much appeal to me as video players as I have a 4.3" screen Android tablet for this that can play 720p.

FCB38:
OK Julian67.
In fact you're right. The little screen a Fuze+ can't do e real difference between good and bad encoding.
Your script seems to be very interesting but I'm on Windows. Is it possible to use this kind of script on Windows?
If not I'll use a GUI for Mencoder.
Regards.

Julian67:
I'm not sure this could work as it is in Windows in cygwin. I think you would be better off using a Mencoder GUI and deciding any audio or crop options on a case by case basis.

Navigation

[0] Message Index

[*] Previous page