Specifications
The bit rate for the file is reported on the Tools>Show Program Info dialog and may be changed using the
Output Options dialog.
● Medium: At medium, the quality / bit rate is 2/3rds of the MPEG header bit rate.
● Low: At low, the quality / bit rate is 1/2 of the MPEG header bit rate.
Output Stream Parameters:The following options deal with how video packets are packetized to form
a program stream. A program is made up of one or more elementary streams where an elementary
stream represents a contiguous stream of audio or video data. The bytes from each of these elementary
streams are broken up into fix sized packets with each packet marked whether it belongs to an audio stream
or video stream. Some of these packets are marked with a time stamp known as the "Presentation
Time Stamp" (PTS) so that when played back, the audio and video are synchronized. The default options
supplied by the program should not have to be changed.
Start Video Frame In New Packet: If checked, a new packet will be started each time a new video frame
is encountered. This option should be used when VideoReDo's output is intended to be used with other
video editors or programs that might require the files to be in a particular format.
Add Padding To Short Packets: This option is only used when video frames are packet aligned.
Elementary stream packets are normally fixed length except when they are truncated early due to packet
alignment. When checked, padding data is inserted into the program stream to preserve a constant overall file
bit rate. There is no program content in these padding packets. Checking this option (along with the video
frame alignment) can increase file size by 5% to 10%.
Align Packet Data To Word Boundary (DigiTV): Some software players such as the Nebula-DigiTV
player require MPEG streams with certain internal packet alignment. You should only need to check this
option when you intend for your videos to be played one on of these players. Otherwise, you will be wasting
bytes within the file.
Output PTS With Each Video Frame: Program time stamps are used to synchronize audio and
video streams. By default all audio packets are marked with a time stamp. When checked, each video frame
is marked with a timestamp. When not checked, only GOP frames have a timestamp. Leaving this box
checked increases the output file by less than 800KB per hour of video.
Output PS Pack Header With All Packets: Program Stream Pack Headers (PS Packets) are used to
keep the internal clock of the playback device (e.g. DVD player) in synchronization with the time stamps inside
the program stream file. When checked, every elementary stream packet is preceded by PS packet. When
not checked, only elementary stream packets with time stamps (PTS) are preceded by a PS packet. Checking
this box adds 1-2% to the output file size.
Program Stream Packet Length: This is the length of the fix-length program stream stream packets
(PES). There are two different sizes, one for MPEG2 and another for MPEG1 The MPEG2 value should
be increased to 2304 for an SVCD compliant file. The default value of 2028 is the standard for DVD
compliant program streams. The MPEG1 size of 2324 is the VCD standard and is recommended for all
MPEG1 situations.
Drop Frame Timecode in GOPs: If this option is checked and the video is NTSC, the timecode in the
GOP will be coded with a drop frame timecode. The drop frame timecode is designed to account for the
differences between 30 frames per second and the actual frame rate of 29.97 frames per second. When this
option is not set, the timecode in the GOP is calculated by dividing the PTS by the frame rate. This option is
not used for PAL videos.
Multiplexor Audio Lag Msec: When a program stream is written by VideoReDo, the audio data typically
trails a frame by a fixed amount of time. This parameter tells VideoReDo's internal multiplexor how long after
the video frame is written to write out the audio frame. The default value of 20 msec should be sufficient for
most situations.
Note: This parameter does NOT affect audio / video synchronization. It only changes the location of the
audio packets in the program stream relative to their corresponding video packets.
VideoReDo TVSuite Help - © 2003-2007 DRDSystems, Inc.