Profiles

Some hardware DVD players are able to play mpeg4 avi. Usually the avi stream has to meet some restrictions called profiles. There exist DivX profiles and MPEG-4 profiles. encode2mpeg support the following profiles:

-profile	Name	-vbr	-setaspect	VBV_buffer	vrc_maxrate	max_bframes
DivXHa	DivX Handheld	200(537)	160(176)	1572	800	0
DivXPo	DivX Portable	768(4854)	320(352)	3145	8000	1
DivXHT	DivX Home Theater	4000(4854)	640(720)	3145	8000	1
DivXHD	DivX High Def	8000(9708)	1280(1280)	6291	16000	2
spL0	MPEG-4 Simple Profile Level 0	64(64)	160(176)	163
spL1	MPEG-4 Simple Profile Level 1	64(64)	160(176)	163
spL2	MPEG-4 Simple Profile Level 2	128(128)	320(352)	655
spL3	MPEG-4 Simple Profile Level 3	384(384)	320(352)	655
aspL0	MPEG-4 Advanced Simple Profile L0	128(128)	160(176)	163
aspL1	MPEG-4 Advanced Simple Profile L1	128(128)	160(176)	163
aspL2	MPEG-4 Advanced Simple Profile L2	384(384)	320(352)	655
aspL3	MPEG-4 Advanced Simple Profile L3	768(768)	320(352)	655
aspL4	MPEG-4 Advanced Simple Profile L4	3000(3000)	320(352)	1310
aspL5	MPEG-4 Advanced Simple Profile L5	8000(8000)	640(720)	1835

When you select a profile, the options: -vf harddup -fixavi will be set togheter with the ones specified in the previous table (maximum values are in patentesis). For example using: -profile DivXHT will set: -vf harddup -fixavi -vbr 4000 -setaspect 640 VBV_buffer=3145 vrc_maxrate=8000 max_bframes=1 and using: -profile aspL5 will set -vf harddup -fixavi -vbr 8000 -setaspect 640 VBV_buffer=1835

The profiles DivXHT (libavcodec and xvid) and aspL5 (libavcodec only) have been tested with the Philips DVP 642.

Example:

encode2mpeg -o movie dvd://1 -avionly -aid 128 -encode 3:2:2 -profile divxht

OpenDML

Avi files can be as big as 2GB, but there exists an extension allowing bigger files called OpenDML. MEncoder creates by default avi files with OpenDML extensions but this could be a problem. If the player does not understand OpenDML extensions, it will play only the first GB of video and will completly ignore the rest of the avi file. By adding the option -noodml to encode2mpeg, you can avoid OpenDML extensions and the avi file will play correctly (if its size is less than 2GB). If you have a player that do not understand OpenDML extensions and your avi file is bigger than 2GB you can solve the problem in two ways:

use the options -noodml and -avisplit 2000
encode2mpeg will split the avi file into smaller 2GB avi without OpenDML extensions.
use the options and -avisplit 1000
encode2mpeg will split the avi file into smaller 1GB avi that should not cause problem to any player.

Text Subtitle Conversion

Some hardware players are able to display text subtitles together with avi streams. encode2mpeg has the capability to convert a text subtitle file that MPlayer understand (and that your player may not understand) in another format. During the conversion process you can also change some proprierties of the subtitle file.

To convert a text subtitle use:

-txtsub <subtitle file>

The text subtitle will be converted to SubViewer format by default. It is possible to control some parameters of the subtitle file with the option -txtsubopts. For example the option:

-txtsubopts Sami:en:dos:on:10:25:sub

will convert to Sami format,append the text en to the name specifyed with -o, use cr/lf as line termination, end the file name with ;1 (iso9660 standard), add a delay of 10 seconds to the subtitle, use 25 as subtitle fps and use sub as filename extension. The default values of -txtsubopts are SubViewer:null:unix:off:0:default:default. You can omit the default values from the argument of -txtsubopts. For example:

-txtsubopts MicroDVD::dos:on

will set MicroDVD as subtitle format, terminate the lines with cr/lf and end the file name with ;1. The other parameters will keep their default values. The option -txtsubopts apply to a previous -txtsub option. You can convert more than one subtitle, each one with a different set of parameters like:

-txtsub <subfile1> -txtsubopts :en -txtsub <subfile2> -txtsubopts :fr

If you convert more than one subtitle, be sure that the final subtitle file names are different: use the option -txtsuboptions with appropriate arguments. Text subtitle conversion is possible only in Avi Mode, therefore the encode2mpeg command line must include the option -avionly. The following table shows the subtitle formats that encode2mpeg can generate with their extensions, also reported are the subtitle formats that the Philips DVP 642 can play, if the file has to be in dos format or unix format and if its name has to terminate with ;1.

subtitle format	extension	DVP 642
SubViewer	srt	yes dos ;1
MicroDVD	sub	yes dos ;1
Sami	smi	yes unix/dos ;1
JACOsub	jss	no
MPsub	mpsub	no

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