VideoReDo TVSuite V6, Application Notes

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Navigation: Output Profiles - Usage and settings

Settings - Advanced tab

Click on a topic to expand:

OutputProfile_AdvancedTab_audio_options

Advanced Audio Options	Description
Convert AAC LATM to ADTS headers	Select "Yes" to save AAC files with ADTS headers even when they are originally formatted with LATM headers. LATM headers are more compact than ADTS headers, but not as widely supported. This option does NOT force a recode of the audio, so if the LATM formatted audio is AAC-HE, it will remain as AAC-HE with LATM headers since ADTS header do not support AAC-HE.
Surround Downmix	Select the down-mix matrix when automatically converting surround sound to stereo: •Stereo: Simple mix of the 5 channels to stereo. The LFE channel is not mixed in and less weight is given to the surround channels. •DD PLii: More advanced down-mix matrix that gives greater wait to the surround channels and includes the LFE content in the stereo down-mix.
Audio Sync Adjustment (msec)	Number of milliseconds to offset the audio / video sync during output. Negative values will move the audio forward relative to the video, positive values move the video forward relative to the audio.
Output AAC as M4A	Only enabled when saving as an elementary stream, selecting "Yes" will wrap the AAC frames within an audio only QuickTime wrapper.
LPCM byte order	Only enabled when saving the output audio codec is uncompressed PCM and determines the byte order of the audio samples.

MPEG-2 Stream Options

OutputProfile_AdvancedTab_MPEG2StreamOptions

MPEG-2 Stream Options

Description

Strip user data blocks from video frames

Select "Yes" to remove all user data blocks from MPEG-2 video frames during output.

Add GOP Timecode to all GOPs

If the source MPEG-2 file doesn't have GOP time codes, this will option will add them.

Output end of sequence at end of saved file

Select "Yes" to add an "End of Sequence" block to the end of the MPEG-2 stream.

Restore missing progressive flags

In rare cases, an MPEG-2 file can have missing progressive flags. If "Yes", this option will detect those situations and turn the progressive flag on for each frame.

Minimum MPEG-2 smart recoding bit rate (Kbps)

When doing a smart edit, where only a few frames at each cut point are recoded, this option sets the minimum recoding bit rate. The default, "0" means VideoReDo TVSuite will set the bit rate based on the frames being recoded. If those frames have a very low bit rate they might not encode as well the original source. For those situations set the minimum bit rate to a higher value. You can see the default encoding bit rate in the VideoReDo TVSuite's log file.

Use drop frame time code

For NTSC/ATSC frame rates (29.97 and 59.94) specify whether the time code in the GOP header will be the standard drop frame or the less typical non-drop frame.

Convert all I-frames to GOPs

Select "Yes" to insure that all MPEG-2 I frames have a sequence header by restoring missing sequence headers.

Set header to video bitrate

Change the MPEG-2 header bit rate to the average bit rate of the output file without forcing a recode.

H.264 Stream Options

OutputProfile_AdvancedTab_H264StreamOptions

H.264 Stream Options

Description

Output HDR parameters at cut points

When doing an H.264 smart edit, setting this option to "Yes" will include an HDR parameter block in the SPS.

Remove filler NALs

If your source file has excessive filler NALs, you can reduce the size of the output file by selecting "Yes". Filler NALs are typically used to smooth out the bit rate of the video stream and are rarely needed for playback unless the file is being broadcast over the air.

Remove embedded End Of Sequence NALs

Extra End of Sequence NALs can cause playback issues for some players such as stuttering. These NALs are rarely needed for proper playback and VideoReDo TVSuite behavior is to remove them.

Transport Stream Options

OutputProfile_AdvancedTab_TransportStreamOpts

Transport Stream Options

Description

Output PAT and PMT packets

Select "No" to omit PAT and PMT packets from the output transport stream multiplex. Transport streams without PAT and PMT packets cannot be processed by most applications. Therefore, this option should always be set to "Yes" except in special circumstances.

PAT / PMT Interval (msec)

Number of milliseconds (in PCR ticks) between PAT and PMT packets. If the TS mux rate is "CableLabs SD" 125 msec (8 times / second) will be used instead of the specified value.

Typical values range from 30 msec to 100 msec. The DVB standard is a maximum of 100 msec between PAT and PMT packets

AC3 PMT Format

Select from one of the following to determine the format of the AC3 PMT registration descriptor:

•Same as source: Copies the format of the AC3 registration descriptor from the source file.

•ATSC: Use the ATSC registration descriptor. Typically used in countries that adhere to the ATSC standard (North America, Korea, etc).

•DVB: Use the DVB specificaiton for the AC3 registration descriptor.

If you select "Same as source" but the source file isn't a transport stream file with an AC3 PMT descriptor, the VideoReDo TVSuite transport stream muxer will make a best guess based on the video's frame rate and encoding dimensions.

Use PIDs from source file

If "Yes", the PIDS will be copied from the source file's stream program map. If "No", the following three fields are enabled to let you specify the actual PID numbers.

Please note that if the source file isn't a transport stream, VideoReDo TVSuite creates it's own internal program map and those values will be used as the PID values in the output file.

Program Map PID

Video PID

Audio Stream 1 PID

Specify the PID values for PMT, VIdeo and Audio streams. If there are multiple audio streams, the PID for those audio streams will be assigned sequentially following Audio Stream 1 PID.

Subtitle stream PIDs will start at the next value after the last audio stream PID.

TS mux rate

This field determines how the transport stream multiplex rate will be calculated. Choose from one of the following:

•Automatic: In Automatic mode, VideoReDo TVSuite attempts to calculate the optimum mux rate by either sampling the source file's bit rates when doing a smart edit, or if doing a full transcode using the video bit rate of the transcode.

•Manual: Specify the mux rate in Kbps.

•ATSC - 19.2 Mbps: Use the ATSC standard mux rate of 19.2 Mbps.

•CableLabs SD: Use the standard CableLabs mux rate. This option also insures quad byte alignment of the MPEG2 picture start code.

Number of samples

If the TS Mux rate field is "Automatic" and you're performing a smart edit, the source file is sampled at various intervals to determine the correct mux rate. This field determines how many samples will be taken. Typically values between 8 and 16 are sufficient.

Mux rate (Kbps)

If the TS Mux rate field is "Manual", use this field to specify the mux rate. For example: 20 Mbps should be entered as 20000.

PCR interval (msec)

How frequently to output a PCR packet. The VideoReDo TVSuite transport muxer always outputs the PCR packets in the video stream, although PCR packets may be separate from video packets. Set this value to 0 to have the muxer output a PCR packet at the start of each video frame.

Max buffer underflows before abort

If the mux rate is too low, PTS underflows will occur. A PTS underflow occurs when the PCR becomes greater than any frames PTS. Depending on how the generated transport stream file is intended to be used, a few PTS underflows may be acceptable. This value is the number of acceptable underflows before the multiplex is automatically aborted.

GeoSATPro / Conaxsat header

Set to Yes to create a transport stream header that has the GeoSATPro metadata block at the front.

Program Stream Options

OutputProfile_AdvancedTab_ProgramStreamOptions

Program Stream Options

Description

Start video frame in new packet

If "Yes" each video frame will start in it's own program stream packet. If "No", video frames will be appended to the end of the previous packet. "No" creates slightly shorter output file sizes.

Add padding to short packets

If a packet is less than the output packet length (specified below), selecting "Yes" will add a filler packet. This feature is required for DVD VOB files where each output packet must begin on a 2048 byte boundary.

Align packet data to word boundary

A program stream data packet (audio and video) has a header before the data. Selecting "Yes" will insure that the data portion of the packet starts on a word boundary rather than a byte boundary. This feature is useful for DVD VOB files.

Output PTS with each frame

If "Yes" a PTS it output at the start of each audio and video frame. If "No" a PTS is only output at the start of each GOP.

Output PS pack header with all packets

The PS pack header contains the SCR time stamp. Select:

•Yes - to include the PS packet header before each video or audio packet.

•No - to only output a PS pack header when a packet contains a PTS value.

Multiplexor audio lag (msec)

Specify the number of milliseconds that audio packets will lag the video packets in the program stream multiplex. The default value of 20 msec, means that 20 msec after a video frame begins being output, the associated audio frame will be output.

Note: This value does NOT affect audio video synchronization, it only affects the placement of audio frames relative to the video frame in a program stream multiplex.

Output empty NAV packets

Select "Yes" if you intent to author a DVD using an external tool which requires the presence of navigation packets.

MPEG-2 output packet length

For MPEG-2 program streams, this is the maximum packet length. It's limited by specification to 32767 bytes, including the header area. If an audio or video frame is longer than the output packet length, it will be continued in the next packet.

MPEG-1 output packet length

For MPEG-1 program streams, this is the maximum packet length. It's limited by specification to 32767 bytes, including the header area. If an audio or video frame is longer than the output packet length, it will be continued in the next packet.

Write System Header

Select "Yes" to include a system header packet as the first packet of the the program stream. If using an external DVD authoring tool, select "No" as those application will typically write their own system header.

MP4/MKV Options

OutputProfile_AdvancedTab_MP4Options

MP4/MKV Options

Descripiton

Move MOOV atom to start of file

Applies to Quicktime files (mov, mp4, m4v) only. A Quicktime file has a MOOV atom which contains metdata information about the file's contents and can't be written until the rest of the file has been output. The MOOV atom can be placed at the end of the file or at the start. The advantage of placing the MOOV atom at the start is that when streaming can begin immediately, whereas if the MOOV atom is located the end the entire file needs to be read before streaming can commence.

If this parameter is set to "yes" then TVSuite will reserve space at the start of the file to store the MOOV atom data. Since the actual space required for the MOOV atom isn't known until the file has processed, TVSuite will generally over allocate this reserved space by up to a few Mbytes to insure that there is room for the MOOV atom data. This may result in a slightly larger than necessary file.

Select "No" to leave the MOOV at the end of the file. This setting may also be useful in the unlikely event that not enough data reserved for the MOOV atom metadata.

Leave SPS/PPS in H.264 frames

When saving H.264 and HEVC files to MP4 and MKV format, The VPS (HEVC), SPS and PPS header information is stored once in the header of the MP4/MKV file. However, some files can have multiple SPS and PPS formats. While this is allowed by the H.264 and HEVC specification, many MP4 and MKV players don't support the ability to store multiple VPS, SPS and PPS formats in the header. If you select "Yes", then a copy of the current VPS/SPS/PPS is stored in the I/IDR frames similar to how they are stored in a transport stream. Most players can handle this format, but not all can. For those that can't, set this option to "No". However, if your source file has multiple VPS/SPS/PPS formats and you select No, playback problems, such as pixelation, can occur.

If you are doing a transcode to an MP4 format, this option can be ignored. It will automatically default to "No" since transcoding by VideoReDo TVSuite will insure that only one VPS/SPS/PPS format is used and can be safely stored in the MP4 and MKV header.

MP4 mux format

Only used if the output format is MP4.

Select from one of the following:

•Generic: Create a standard MP4 file suitable for use in most portable and streaming devices such as phones, tablets and players.

•iPod: Special MP4 format used by original iPods. Should only be used if the generic format doesn't work on your portable device.

•PSP: Special MP4 used by Sony PlayStation Personal player. Should only be used if the generic format doesn't work on your portable device.

•MOV: standard QuickTime format. This multiplex format will always be used if the output file contains PCM audio.

Intelligent Recode Options

Intelligent Recode Options

Description

MPEG2-2 Encoder Quality

This option sets the MPEG-2 encoder quality for the frames smart encoded at cut points. Only used if the source and output video is MPEG-2 and smart cutting is being performed.

Selection from:

•Low: Close to equal weights for I, P and B frames which results in a smaller encode and lower quality.

•Medium: More weight to the I-frame.

•High: Much more weight to the I-frame resulting in a high quality, but larger encoding.

•Auto: Similar to high, but instead of setting the bit rate of the recoded frames to the average for the entire file, it recomputes the bit rate for the area around the recode and is adaptive at different cut points.

Bitrate calculation mode

When the profile is set to "intelligent" but smart cutting can't take place (see Profile types), VideoReDo TVSuite will automatically switch to transcoding mode. These settings determine the bit rate for the transcode.

Select from one of the following:

•Quality Factor: The transcoding bit rate is calculated using the source bit rate, output resolution and frame rate, along with source and output codecs.

•Bitrate Presets: The transcoding bit rate is based on the output frame size.

•Target File Size: The transcoding bit rate is computed based on the output duration and target file size in MBytes.

MPEG-2 to H.264
H.264 to H.264

HEVC to H.264

H.264 to MPEG-2

MPEG-2 to MPEG-2

HEVC to MPEG-2

MPEG-2 to HEVC

H.264 to HEVC

HEVC to HEVC

The values represent a percentage so that the output bit rate will be this percentage of the source bit rate.

For example, if the source file is MPEG-2 and the output is H.264 and MPEG-2 to H.264 is 70%, then the output bit rate will be 70% of the source file's video bit rate.

If the source video codec is anything other than MPEG-2, H.264 or HEVC, the profile will default to the appropriate bit rate mode setting. In addition if the source bit rate isn't calculated, such as when doing a QuickStream Fix, this setting is ignored and VideoReDo TVSuite will automatically switch to the Bitrate calculation mode.

SD Average Bitrate (kbps)

SD Max Bitrate (kbps)

.....

The average and maximum bit of the transcoded is based on the frame size. SD files are any files less than 720 pixels in height.

Target File Size (MB)

The output bit rate is based on the output duration and desired size of the output file.

For example, if the output (edited) file is 30 minutes long and the target file size is 1 GB (1000 MB), the transcoding bit rate will be 4.4 MBits.

Regardless of the setting, the minimum MPEG-2 bit rate is 1 Mbps, and 0.5 Mbps for all other output codecs. If "Target File Size" is 0, then the minimum bit rates will be used.

When performing a QuickStream Fix, this setting is ignored since VideoReDo TVSuite hasn't calculated the file's duration needed to determine a target bit rate and Bitrate calculation mode is used instead.

Misc Options

OutputProfile_AdvancedTab_MiscOptions_TVS

Misc Options

Description

Editing Accuracy

This options determines if the smart editor will be doing frame accurate cuts or GOP accurate cuts.

Select one of:

•Global default: Use the frame accurate / gop accurate option from the Tools>Options>General page.

•Frame Accurate: Cuts will be frame accurate.

•GOP Accurate: Cuts will be accurate to the nearest GOP start that includes the cut frame. At output segment start this means the previous GOP (I or IDR) frame. At segment end, the means up until, but not including, the next I or IDR frame.

Split Scenes

Set to "Yes" to segment each output scene into a unique file rather than concatenating into a single output file. When splitting a number is appended to each output scene. For example, if you specify an output file name of "output.mp4" with Split Scene set to yes, and there are two output segments, the output files will be named "output_1.mp4" and "output_2.mp4".

You can also set this option using the drop-down arrow next to the save button in the "Save video" dialog.

Resize method

If resizing is required, specifies which resizing algorithm to use.

Select one of:

•Default: Uses the default algorithm, currently Bicubic.

•High: Uses the Bicubic when enlarging and Super when reducing by more than 60% in both dimensions.

•Lanczos: Use the Lanczos algorithm.

•Bicubic: Use the Bicubic algorithm.

•Linear: Uses a linear resizing algorithm. Linear is faster than the Lanczos or Bicubic, but doesn't create as smooth a looking output.

•Super: This should only be used when doing large reductions in size, i.e. greater than 3:1. The Super algorithm insures that all source pixels are used in computing the output frame. It generally give the best output picture when doing large resizing.

Video Encoding Parameters - MPEG-2

OutputProfile_AdvancedTab_MPEG2EncodingParams

MPEG-2 encoding parameters

Description

Profile

Leave unchecked to let VideoReDo TVSuite automatically determine the output Profile.

Level

Leave unchecked to let VideoReDo TVSuite automatically determine the appropriate MPEG-2 encoding level.

IP Distance

Change to specify the distance between successive I and P frames. The default value of 3 is typical of most MPEG2 files and means there will be two B-frames between each I and P frame.

Set to "0" to encode a file with only I and P frames.

Note: For MPEG-2 encoding the GOP size is set on the Video tab.

VBV Size

Use this option to override the default VBV size.

Closed GOP

If set to "Yes" then all GOPs will be encoded as marked as closed. The default is only the first GOP of the file is marked as closed.

Field order

For interlaced encoding, specify whether the output file should be encoded as "Top field first" (default) or "Bottom field first". If the source file has opposite field order, VideoReDo TVSuite will automatically adjust the field cadence.

Intra DC precision

Option to override the DC precision. Higher DC precision results in higher quality but uses more bits.

Q Max

Maximum allowable Q (quantizer matrix). High Q values result in additional compression but sacrifice quality. This option should normally be left unchecked so that VideoReDo TVSuite will choose the best default.

Use non-linear quant matrix

Select "Yes" or "No" to determine which quant matrix to use. Unless you have a specific encoding requirement, this option is best left unchecked.

Encoding threads

This parameter is only used if the MPEG-2 encoder is software. The GPU encoders (Intel QuickSync) ignore this setting.

Enter the number of threads to use for encoding. A value of 0 means set the threads to the physical number of cores (up to 12).

Video Encoding Parameters - H.264

OutputProfile_AdvancedTab_H264EncodingParams

The degree to which you can tailor the advanced encoding options depends on which codec you've selected which encoder is selected on the profile settings page.

H.264 encoding parameters	Description	Software encoder	Intel QuickSync	NVidia NVEnc
Profile	Select from one of: •Baseline •Main •High •High10 •High422		High10 and High422 are not supported.	High10 and High422 are not supported.
Level	Select from one of the Level options in the drop down list
VBV size (bytes)	Enter the size of the CPB buffer in bytes.
Interlace mode	Select one of: •Interlaced: Interlaced only encoing. Treated by the software encoder as MBAFF. •MBAFF; Macro block adaptive frame / field. Ignored if output is progressive.	For interlaced material, only MBAFF supported	For interlaced encoding, only PAFF supported.	Newer NVidia GPUs DO NOT support interlaced. MBAFF support depends on the GPU.
HRD maintain	Select one of: •Yes: To include the HRD parameters in the SPS (Sequence parameter set) •No: To not include the HRD parameters in the SPS			Writing HRD parameters not supported.
Entropy coding mode	Select one of: •CAVLC: To use CAVLC encoding. CAVLC encoding is slightly faster to encode. •CABAC: To use CABAC encoding. CABAC yields about 5% to 15% better compression than CAVLC.
GOP size	Number of frames between I / IDR frames. If scene detection is enabled, this becomes the maximum number of frames between scenes. If scene detection is disabled (default), all GOPs will be sized to this value.
Scene detection enabled	Select one of: •Yes: To enable automatic scene detection. VideoReDo TVSuite will insert I or IDR frames when it detects a scene change. This will result in variable length GOPs. •No: Disable scene detection (default)		Not supported	Not supported
Reordering delay	Number of B frames between consecutive I and P frames. If set to 1 there will be no B frames generated. Allowable range is 1 to 4.		Not supported. Automatically set by encoder.	Not supported. Automatically set by encoder.
Use B slices as reference frames	•Yes: To allow B-slices / frames to be used as reference. •No: B-slices won't used as reference frames.		Not supported by the encoder.	Not supported by the encoder.
Encoder determines B or P type	•Yes: Encoder will automatically choose whether to encode non-I/IDR frame as a B or P frame. Choosing this option will slightly improve quality without increasing the bit rate. •No: Use a fixed GOP structure of B and P frames		Not supported by the encoder.	Not supported by the encoder.
Weighted prediction for P frames	•Yes: Allow weighted prediction for P frames. Using weighted predictions slightly improves encoding quality with some sacrifice in speed. •No: Don't use weighted predictions (default).		Not supported by the encoder.	Not supported by the encoder.
Subpixel motion search depth	Determines how deep to search when creating motion vectors. Default is full pixel. Half Pxiel and quater pixel serach can result in better compression at the cost of additional encoding speed. •Full pixel only (default) •Full and half pixels •Full, half and quater pixels		Not supported by the encoder.
Enable 8x8 DCT transforms	•Automatic, let the encoder decide whether to use 4x4 or 8x8 transforms. •Disable: Don't use 8x8 transforms. •Enable: Always use 8x8 transforms. 8x8 transforms are only used by high profiles and are ignored for baseline and main profiles.		Setting not supported by the encoder.
IDR frequency	If non-zero, only IDR frames will be used, otherwise just I frames, except for the first frame in the file. In general terms, an IDR-frame implies the start of a closed GOP while an I-Frame means GOP may be open.
Number of reference frames	Choose the number of reference frames. Can be any value between 0 and 16 although it may be reduced to match the number of reference frame limits of the chosen profile and level
SPS every I-frame	•Yes: Include the SPS and PPS in every I-frame (default) •No: Only put an SPS and PPS in IDR frames.		Not supported by the encoder. All I/IDR frames contain an SPS and PPS.
Field order	Select one of: •Top field first •Bottom field first Note: Only applies if the encoding is interlaced.
Use full video range	•Yes: Set the "video full range flag" in the VUI section of the SPS. •No: Don't set the flag (default)		Not currently supported.	Not currently supported.
Slices per frame or field	Enter the number of slices per frame. Default is one. Increasing the number of slices per frame improves encoding speed since each slice can be encoded in a separate thread. However, there is a small sacrifice in overall quality since motion prediction vectors can't cross slice boundaries.		Not supported by the encoder.	Not supported by the encoder.
Preset	Select from one of: •Ultrafast •Superfast •Very fast •Faster •Fast •Medium •Slow •Slower •Very slow •Placebo		Not applicable for GPU encoders.	Not applicable for GPU encoders.
Tuning	These settings are a one to one match for x.264's Tuning parameters. Note: Please google X.264 --fullhelp for additional information.		Not supported by the encoder.	Not supported by the encoder.

Video Encoding Parameters - HEVC FIX ME!!!!!

OutputProfile_AdvancedTab_HEVCEncodingParams

The degree to which you can tailor the advanced encoding options depends on which codec you've selected which encoder is selected on the profile settings page.

HEVC encoding parameters	Description	Software encoder	Intel QuickSync	NVidia NVEnc
Profile	Select from one of: •Baseline •Main •High •High10 •High422		High10 and High422 are not supported.	High10 and High422 are not supported.
Level	Select from one of the Level options in the drop down list
VBV size (bytes)	Enter the size of the CPB buffer in bytes.
Interlace mode	Select one of: •Interlaced: Interlaced only encoing. Treated by the software encoder as MBAFF. •MBAFF; Macro block adaptive frame / field. Ignored if output is progressive.	For interlaced material, only MBAFF supported	For interlaced encoding, only PAFF supported.
HRD maintain	Select one of: •Yes: To include the HRD parameters in the SPS (Sequence parameter set) •No: To not include the HRD parameters in the SPS			Writing HRD parameters not supported.
Entropy coding mode	Select one of: •CAVLC: To use CAVLC encoding. CAVLC encoding is slightly faster to encode. •CABAC: To use CABAC encoding. CABAC yields about 5% to 15% better compression than CAVLC.
GOP size	Number of frames between I / IDR frames. If scene detection is enabled, this becomes the maximum number of frames between scenes. If scene detection is disabled (default), all GOPs will be sized to this value.
Scene detection enabled	Select one of: •Yes: To enable automatic scene detection. VideoReDo TVSuite will insert I or IDR frames when it detects a scene change. This will result in variable length GOPs. •No: Disable scene detection (default)		Not supported	Not supported
Reordering delay	Number of B frames between consecutive I and P frames. If set to 1 there will be no B frames generated. Allowable range is 1 to 4.		Not supported. Automatically set by encoder.	Not supported. Automatically set by encoder.
Use B slices as reference frames	•Yes: To allow B-slices / frames to be used as reference. •No: B-slices won't used as reference frames.		Not supported by the encoder.	Not supported by the encoder.
Encoder determines B or P type	•Yes: Encoder will automatically choose whether to encode non-I/IDR frame as a B or P frame. Choosing this option will slightly improve quality without increasing the bit rate. •No: Use a fixed GOP structure of B and P frames		Not supported by the encoder.	Not supported by the encoder.
Weighted prediction for P frames	•Yes: Allow weighted prediction for P frames. Using weighted predictions slightly improves encoding quality with some sacrifice in speed. •No: Don't use weighted predictions (default).		Not supported by the encoder.	Not supported by the encoder.
Subpixel motion search depth	Determines how deep to search when creating motion vectors. Default is full pixel. Half Pxiel and quater pixel serach can result in better compression at the cost of additional encoding speed. •Full pixel only (default) •Full and half pixels •Full, half and quater pixels		Not supported by the encoder.
Enable 8x8 DCT transforms	•Automatic, let the encoder decide whether to use 4x4 or 8x8 transforms. •Disable: Don't use 8x8 transforms. •Enable: Always use 8x8 transforms. 8x8 transforms are only used by high profiles and are ignored for baseline and main profiles.		Setting not supported by the encoder.
IDR frequency	If non-zero, only IDR frames will be used, otherwise just I frames, except for the first frame in the file. In general terms, an IDR-frame implies the start of a closed GOP while an I-Frame means GOP may be open.
Number of reference frames	Choose the number of reference frames. Can be any value between 0 and 16 although it may be reduced to match the number of reference frame limits of the chosen profile and level
SPS every I-frame	•Yes: Include the SPS and PPS in every I-frame (default) •No: Only put an SPS and PPS in IDR frames.		Not supported by the encoder. All I/IDR frames contain an SPS and PPS.
Field order	Select one of: •Top field first •Bottom field first Note: Only applies if the encoding is interlaced.
Use full video range	•Yes: Set the "video full range flag" in the VUI section of the SPS. •No: Don't set the flag (default)		Not currently supported.	Not currently supported.
Slices per frame or field	Enter the number of slices per frame. Default is one. Increasing the number of slices per frame improves encoding speed since each slice can be encoded in a separate thread. However, there is a small sacrifice in overall quality since motion prediction vectors can't cross slice boundaries.		Not supported by the encoder.	Not supported by the encoder.
Preset	Select from one of: •Ultrafast •Superfast •Very fast •Faster •Fast •Medium •Slow •Slower •Very slow •Placebo		Not applicable for GPU encoders.	Not applicable for GPU encoders.
Tuning	These settings are a one to one match for x.264's Tuning parameters. Note: Please google X.264 --fullhelp for additional information.		Not supported by the encoder.	Not supported by the encoder.

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VideoReDo TVSuite V6, Application Notes