Compression settings

[xj-boonie]

Is there a way to add, and remove, the different options in the compress menu? I won't ever use the PSP or RAZR ones, but would like to add one for my palm TX.

Thanks,
Mike

[Opus4]

You can't change or remove the existing conversion format options, but you could add properties for new formats. See the transcoder/formats/xxxx lines in sage.properties.

- Andy

[xj-boonie]

Is there a guide to what all the arguments in those lines mean?

[Patilan]

Originally Posted by xj-boonie

Is there a guide to what all the arguments in those lines mean?

You wish!

...

Atcually, I too wish.

[bluenote]

Me too, please?

Do any of these correspond to H.264 too?

thx

Cory

[omega]

Since we know from past discussions that SageTVTranscoder.exe is essentially a customized version of (or at least based heavily on) the ffmpeg/libavcodec project, you can figure out the meanings of the options by reading the ffmpeg documentation. Obviously that won't help with the special syntax being used in the Sage.properties file, and we also don't know exactly which ffmpeg options are available with SageTVTranscoder.exe, but it should at least provide a useful baseline reference.

[nielm]

Originally Posted by xj-boonie

Is there a guide to what all the arguments in those lines mean?

No. but here are some hints.

Note that '=' signs need to be prefixed by a '\' -- I have removed that '\' here for clarity.
Note that anything x=y needs to have a ';' after it...

The format property line consists of:
transcoder/formats/<format group name>-<format sub-name>=<format parameters>

The <format parameters> consists of:

f=<file format dvd/avi/mp4/flv/psp/3gp etc>;
(Optional) MCompressionDetails=<arguments passed directly to ffmpeg>;
[bf=vid;<video format arguments>]
[bf=aud;<audio format arguments>]

<video format arguments> includes:
f=<video encoder supported by ffmpeg eg: mpeg4/xvid/h264/mpeg2video>;
br=<bitrate>;
fps=<framerate>
w=<width>
h=<height>
arn=<aspect ratio numerator, eg 4 or 16>
ard=<aspect ratio demoniator, eg 3 or 9>


<audio format arguments> includes
f=<audio encoder supported by ffmpeg eg: aac/mp2/mp3/ac3>;
sr=<sampling rate in Hz>;
ch=<channels 1=mono 2=stereo>;
bsmp=<bits/sample>;
br=<bitrate>;


if you just specify [br=vid;][br=aud;] with no further parameters, that stream is copied with no encoding (remuxing)

If you miss out [br=vid;...], then only the audio stream will be in the converted file


Here are some transcoding parameters I created:

700kbit/s Mpeg4, deinterlaced, resized to 384x288 (half-res PAL) with 128kbit MP3, labelled as DIVX

transcoder/formats/MPEG4-PAL Low\ Res\ Deint\ AVI=f\=avi;MCompressionDetails\=-vtag DIVX -deinterlace;[bf\=vid;f\=mpeg4;br\=700000;w\=384;h\=288;][bf\=aud;f\=mp3;sr\=44100;ch\=2;br\=128000;]

same but resized to 320x240 (half-res NTSC)

transcoder/formats/MPEG4-NTSC Low\ Res\ Deint\ AVI=f\=avi;MCompressionDetails\=-vtag DIVX -deinterlace;[bf\=vid;f\=mpeg4;br\=700000;w\=320;h\=240;][bf\=aud;f\=mp3;sr\=44100;ch\=2;br\=128000;]

2Mbit deinterlaced 640x480 FLV with 128kbit MP3

transcoder/formats/FLV-High\ Quality\ Deinterlaced=f\=flv;MCompressionDetails\=-deinterlace;[bf\=vid;f\=flv;br\=2000000;w\=640;h\=480;][bf\=aud;f\=mp3;sr\=44100;ch\=2;br\=128000;]

Convert 4x3 letterboxed to 16x9 anamorphic PAL DVD-format
(Deinterlace, Crop top and bottom, resize back to PAL format. Set AR as 16x9.Re-encode as MPEG2 )

transcoder/formats/DVD-St\ Play\ ltrbox-to-ana=f\=dvd;MCompressionDetails\=-deinterlace -croptop 64 -cropbottom 64 -aspect 16\:9 -s 720x576;[bf\=vid;f\=mpeg2video;br\=6400000;fps\=25;w\=720;h\=576;vbr\=1;][bf\=aud;f\=mp2;sr\=48000;ch\=2;bsmp\=16;br\=384000;]

[nielm]

Originally Posted by cnovak

Do any of these correspond to H.264 too?

AppleTV formats are h264

[evilpenguin]

Just as an addition to Nielms nice guide, here's a quick little reference as to what the existing SageTV profiles actually translate to on the command line.

http://perl2dvd.svn.sourceforge.net/...xt?view=markup

[bluenote]

I've checked the ffmpeg documentation, and to my admittedly unskilled eyes, I can't seem to find the answer I'm looking for.

When I encode to mp3, gspot shows it as CBR afterwards. I far prefer VBR if I could (or ABR?? not sure about that). Is there a way to specify ?

thanks

Cory

[camus]

I really like the AppleTV Widescreen setting for HD, quality to file size is great, only problem is it converts to stereo, does it/can you convert to AAC 5.1?