Specifications

Output File Options

Output Options

This dialog is displayed by pressing the "Options" button in the File Save As dialog box.

Video Properties

Aspect Ratio: Use this option to change the aspect ratio bits in the MPEG2 sequence header. Changing these

bits does not affect the actual video stream nor will it convert video from one format to another. It is used when

the actual aspect ratio recorded by the capture card is incorrect.

Bit Rate: This option is used to change the bit rate fields in the MPEG2 sequence header. Changing this field

does not affect the actual video stream. It is used when the actual bit rate, as recorded in the file, is incorrect. It

is most often used to change the DVB 15Mbps bitrate to a lower value so that the resultant MPEG2 stream

is acceptable to DVD authoring programs and players.

Technical Note: If you specify a bit rate override of 10 Mbps, VideoReDo will assume that you want the

MPEG headers to correspond to DVD specifications. The video bit rate will be set to 9.80 Mbps less the audio

bit rate, and the overall program stream mux rate will be set to 10.08 Mbps.

Maximum GOP Length: This parameter is used to have VideoReDo reduce the GOP size when when writing the

output stream. GOP size reduction is usually used to take long GOP program material, such as those captured from satellite

or PVRs, and make the program DVD compliant. Compliant DVDs have a maximum of 18 frames per GOP although

15 frames seems to be a more frequently used convention. If you set the maximum GOP size to a value greater than

4, VideoReDo will recode frames so that all GOPs in the output file will be less than or equal to that maximum size.

This frame recoding will add significantly to the time it takes to output your video, and will also increase the file size by

at least 10%.

Output Empty NAV Packets : This option is used to insert blank NAV packets into an MPEG Program Stream.

This format is suitable for input directly into some DVD authoring programs such as the open source

program: dvdauthor.

Audio Properties

Encoding: Use this option to specify the audio stream type of the output file. Options are: No Change, MPEG

audio, or LPCM/WAV audio

Bit Rate: This option is used to change the bit rate of the MPEG audio stream. Changing this field affects the

output audio stream. LPCM audio is uncompressed and does not have a bitrate option.

Sampling Rate: This option is used to change the sample rate of the MPEG audio stream. Changing this field

affects the output audio stream. optin can be used to convert audio to a DVD compliant format (48,000.)

Note: If you specify a change to the Audio Properties, the audio output stream is modified. This is not simply

a change to the header information.

Remember These Settings: This option is used to permanently use these options for output of future files

so the settings do not need to be manually adjusted each time.