ASFChop

ASFChop is a simple .asf file editor. Use ASFChop to delete pieces of an .asf file. ASFChop also makes an .asf file seekable, that is, if an .asf file is longer than 10 seconds in length, ASFChop will create an index for that file so that you can seek (similar to fast forwarding) through the file. This is a useful feature because the Real-Time Encoder does not create seekable .asf files. You can use ASFChop to create an index in an .asf file without cutting any information. To do this, specify the -in and -out commands (as seen below) without specifying any time, and be sure to give the output .asf file a different name than the input .asf file.
ASFChop Command Options
Flag name Flag argument Description

-duration time The duration of the output .asf file. Note: Use either the -duration or -end flags.

-eccspan on|off Use this flag to turn error correction on or off. The default setting for error correction is to use error correction if the input file uses error correction.

-end time Specify the time when you want the .asf file to end.

-in filename.asf Specify the .asf file that you want to edit.

-out filename.asf Specify a name for the output file. If you don't give the output file a name, ASFChop will scan the input file but will not produce an output file. The output file name must be different than the input file name.

-start time Use this flag to cut off the beginning of an .asf file. When you set a start time, ASFChop removes everything before that time. When the .asf file is saved, that time becomes the beginning of the .asf file.

ASFChop Command Options
Flag name	Flag argument	Description
-duration	time	The duration of the output .asf file. Note: Use either the -duration or -end flags.
-eccspan	on\|off	Use this flag to turn error correction on or off. The default setting for error correction is to use error correction if the input file uses error correction.
-end	time	Specify the time when you want the .asf file to end.
-in	filename.asf	Specify the .asf file that you want to edit.
-out	filename.asf	Specify a name for the output file. If you don't give the output file a name, ASFChop will scan the input file but will not produce an output file. The output file name must be different than the input file name.
-start	time	Use this flag to cut off the beginning of an .asf file. When you set a start time, ASFChop removes everything before that time. When the .asf file is saved, that time becomes the beginning of the .asf file.

Note Times for any of the flags should be specified as hh:mm:ss.t. For example 04:12:28.9 is four hours, twelve minutes, 28 seconds, and nine tenths.