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Pixel aspect ratio
Specifies the page ratio of the individual image points (pixels).
Meaning: Different television norms and the standard pixel ratio. Select a setting and
the results are displayed as "X" and "Y".
X/Y: The actual pixel ratio. If under "Meaning" the setting "Custom" is selected, then
a custom ratio can be set.
GOP structure
Max key interval
Determines the maximum GOP (view page 372) length. High values mean improved
compression. Lower values create stronger security protection and enable improved
access to individual frames for processing the vide
o.
B-frames count
The number of B-Frames (view page 374). Several applications, e.g. video
conferences, require a setting of "0" for this, i.e. no B-Frames, in order to enable the
shortest possible reaction times for transfer.
Scene change detection
If this option is activated the scenes will be detected during encoding, thus allowing
you to insert an I frame (view page 373) after a scene change.
Audio codec:
Under "Audio", "AAC" (view page 362) is preset. If you have chosen an AVCHD
transport stream from the presets, "AVCHD audio track" will be available.
AAC
AAC was developed by MPEG, the Moving Picture Experts Group, as an audio data
compression process that was specified as a further development of MPEG-2
Multichannel in the MPEG-2 standard.
AAC is equally suitable for encoding general audio information and not especially
optimized for certain types of audio material.
AAC audio can be encoded with a sample rate of 8000, 16000, 24000, 32000 or
48000 Hz in either mono or stereo. By default, the sound is set to 48000 Hz stereo.
The higher the sample rate is, the larger the resulting file and higher the audio quality.
You can use the technical specifications of your playback device to help with this.