Video Action Script

As I wrote in your thread in the Photoshop forum I do not believe an Action can be recorded or edited to do what you want to do.  A Photoshop Script would be able to do what you want to do.  However, It would not be fast or elegant with my knowledge of Photoshop and  my script hacking abilities.  The ironic part is I would need to use Action Manager code to accomplish the your  process.  Script can use logic to segment thing and create script functions  from action manager code the have variable passed to them.  I opened a video I created in Photoshop. An MP4 that is 4 second. I created 4,  1 second mp4  from that video.  I was also able to Open the 1 second mp4 and use save for web to save and animated gif for each one.  Looking at what the scriptlisener recorded for the export steps like export a 30 frame mp4 ie 1sec.  One could easily create functions that perform the required steps. Pass the function the output file to create and which frames to output like frame 1 to 30, then from 31 to 60 etc.. Here is what I saw recorded.

// =======================================================
var idExpr = charIDToTypeID( "Expr" );
    var desc63 = new ActionDescriptor();
    var idUsng = charIDToTypeID( "Usng" );
        var desc64 = new ActionDescriptor();
        var iddirectory = stringIDToTypeID( "directory" );
        desc64.putPath( iddirectory, new File( "E:\\My Files\\Pictures\\3D\\Earth 1" ) );
        var idNm = charIDToTypeID( "Nm  " );
        desc64.putString( idNm, """Earth31.mp4""" );
        var idameFormatName = stringIDToTypeID( "ameFormatName" );
        desc64.putString( idameFormatName, """H.264""" );
        var idamePresetName = stringIDToTypeID( "amePresetName" );
        desc64.putString( idamePresetName, """1_High Quality.epr""" );
        var iduseDocumentSize = stringIDToTypeID( "useDocumentSize" );
        desc64.putBoolean( iduseDocumentSize, true );
        var iduseDocumentFrameRate = stringIDToTypeID( "useDocumentFrameRate" );
        desc64.putBoolean( iduseDocumentFrameRate, true );
        var idpixelAspectRatio = stringIDToTypeID( "pixelAspectRatio" );
        var idpixelAspectRatio = stringIDToTypeID( "pixelAspectRatio" );
        var idDcmn = charIDToTypeID( "Dcmn" );
        desc64.putEnumerated( idpixelAspectRatio, idpixelAspectRatio, idDcmn );
        var idfieldOrder = stringIDToTypeID( "fieldOrder" );
        var idvideoField = stringIDToTypeID( "videoField" );
        var idpreset = stringIDToTypeID( "preset" );
        desc64.putEnumerated( idfieldOrder, idvideoField, idpreset );
        var idmanage = stringIDToTypeID( "manage" );
        desc64.putBoolean( idmanage, true );
        var idinFrame = stringIDToTypeID( "inFrame" );
        desc64.putInteger( idinFrame, 31 );
        var idoutFrame = stringIDToTypeID( "outFrame" );
        desc64.putInteger( idoutFrame, 60 );
        var idrenderAlpha = stringIDToTypeID( "renderAlpha" );
        var idalphaRendering = stringIDToTypeID( "alphaRendering" );
        var idNone = charIDToTypeID( "None" );
        desc64.putEnumerated( idrenderAlpha, idalphaRendering, idNone );
        var idQlty = charIDToTypeID( "Qlty" );
        desc64.putInteger( idQlty, 3 );
        var idZthreeDPrefHighQualityErrorThreshold = stringIDToTypeID( "Z3DPrefHighQualityErrorThreshold" );
        desc64.putInteger( idZthreeDPrefHighQualityErrorThreshold, 5 );
    var idvideoExport = stringIDToTypeID( "videoExport" );
    desc63.putObject( idUsng, idvideoExport, desc64 );
executeAction( idExpr, desc63, DialogModes.NO );

The Clean SC script made that code easier to read and into a function export2.

export2(new File( "E:\\My Files\\Pictures\\3D\\Earth 1" ), "Earth31.mp4", "H.264", "1_High Quality.epr", true, true, true, 31, 60, 3, 5);

The Paths woul be set and constant the mp4 names will chanede with each use as will the start and end frames numbers

Yoy shold check out Clean SL

// =======================================================
export2(new File( "E:\\My Files\\Pictures\\3D\\Earth 1" ), "Earth31.mp4", "H.264", "1_High Quality.epr", true, true, true, 31, 60, 3, 5);
function export2(directory, name2, ameFormatName, amePresetName, useDocumentSize, useDocumentFrameRate, manage, inFrame, outFrame, quality, Z3DPrefHighQualityErrorThreshold) {
var descriptor = new ActionDescriptor();
var descriptor2 = new ActionDescriptor();
descriptor2.putPath( stringIDToTypeID( "directory" ), directory );
descriptor2.putString( stringIDToTypeID( "name" ), name2 );
descriptor2.putString( stringIDToTypeID( "ameFormatName" ), ameFormatName );
descriptor2.putString( stringIDToTypeID( "amePresetName" ), amePresetName );
descriptor2.putBoolean( stringIDToTypeID( "useDocumentSize" ), useDocumentSize );
descriptor2.putBoolean( stringIDToTypeID( "useDocumentFrameRate" ), useDocumentFrameRate );
descriptor2.putEnumerated( stringIDToTypeID( "pixelAspectRatio" ), stringIDToTypeID( "pixelAspectRatio" ), stringIDToTypeID( "document" ));
descriptor2.putEnumerated( stringIDToTypeID( "fieldOrder" ), stringIDToTypeID( "videoField" ), stringIDToTypeID( "preset" ));
descriptor2.putBoolean( stringIDToTypeID( "manage" ), manage );
descriptor2.putInteger( stringIDToTypeID( "inFrame" ), inFrame );
descriptor2.putInteger( stringIDToTypeID( "outFrame" ), outFrame );
descriptor2.putEnumerated( stringIDToTypeID( "renderAlpha" ), stringIDToTypeID( "alphaRendering" ), stringIDToTypeID( "none" ));
descriptor2.putInteger( stringIDToTypeID( "quality" ), quality );
descriptor2.putInteger( stringIDToTypeID( "Z3DPrefHighQualityErrorThreshold" ), Z3DPrefHighQualityErrorThreshold );
descriptor.putObject( stringIDToTypeID( "using" ), stringIDToTypeID( "videoExport" ), descriptor2 );
executeAction( stringIDToTypeID( "export" ), descriptor, DialogModes.NO );
}