There are different values and settings that can be customised within a just:in mac H.264 Capture preset Preset. Initially, the container type can be selected. There are two container options available:
AVFoundation QuickTime (with Timecode Track)
MP4 (no Timecode Track)
H.264 is a very complex codec standard and sometimes it is very difficult to work with this codec and its settings. Therefore is a bit more tedious to set up. Therefore, just:in mac provides some various options, which can be modified within a Capture preset.an “H.264 preset”. After choosing the container type, you have to define two general settings:
After choosing the container type, you have to define two general settings:
Resolution
Frame rate (has to match the Video Mode of the Channel)
Next, you have need to select the H.264 profile. Three options are available:
Baseline “Baseline” - Baseline encodes are the most basic form of encoding. While decoding is much easier, it may also require much higher bit - rates to maintain the same level of quality.
Main “Main” - The middle ground. Most modern/current devices will support this profile.
High Profile “High Profile” - For best quality and file size at the expense of CPU time in both decode decoding and encodeencoding.
Then you can set the Bitrate in bit/s.
B-Frame - Short for bi-directional bidirectional frame, or bi-directional bidirectional predictive frame. As the name suggests, B-frames rely on the frames preceding and following them. B-frames contain only the data that has changed from the preceding frame or are is different from the data in the very next frame. B-frames increase compression efficiency, particularly at lower bitrates. We recommend to have having this option enabled.
The GOP-Size determines the maximum distance between I-frames. Very high GOP lengths will result in a slightly more efficient compression , but will make seeking/scratching in the video somewhat more difficult. Recommended The recommended default is 0, which sets the encoder to Auto-GOP.
Lastly, you can define the entropy mode Entropy Mode. When you select the “Main or “or “High Profile” (Baseline “Baseline” is CAVLC “CAVLC” only), you have two options:
CAVLC“CAVLC”: Context-based adaptive variable-length coding
CABAC“CABAC”: Context-based adaptive binary arithmetic coding
“CAVLC” is the lower-quality, easier-to-decode option, “CABAC” is the higher-quality, harder-to-decode option.
Recommended settings for HD presets:
Resolution: custom
Frame rate: custom
Profile: “Main” or “High”
Bitrate: custom
Allow B-Frames: Activated
GOP-Size: 0“0”
Entropy Mode: “CABAC”
Recommended settings for SD presets:
Resolution: custom
Frame rate: custom
Profile: “Baseline” or “Main”
Bitrate: custom
Allow B-Frames: Activated
GOP-Size: “0”
Entropy Mode: “CAVLC”