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HandBrake supports batch encoding through graphical user interface (GUI) and command-line interface (CLI). [10] Third-party scripts and UIs exist specifically for this purpose, such as HandBrake Batch Encoder, [11] VideoScripts, [12] and Batch HandBrake. [13] All make use of the CLI to enable queueing of several files in a single directory ...
Like most desktop hardware-accelerated encoders, Quick Sync has been praised for its speed. [5] The eighth annual MPEG-4 AVC/H.264 video codecs comparison showed that Quick Sync was comparable to x264 superfast preset in terms of speed, compression ratio and quality (); [6] tests were performed on an Intel Core i7-3770 processor.
Unlike all other levels, no minimum decoder capacity is required, only a best-effort with reasonable fallback. Within these new profiles came enhanced coding features, many of which support efficient screen encoding or high-speed processing: Persistent Rice adaptation, a general optimization of entropy coding.
SDK 1.0 supports Smart Adaptive Bitrate Encoding Technology (SABET) which allows for the simultaneous encoding of up to 10 video output streams with reduced computing cost. [48] SDK 1.0 is available for Windows and SDK 1.0.1, which will be released in July 2013, will add support for Linux and macOS.
This allows the encoder to make efficient decisions on the best way to encode a given picture. At the decoder, such pictures are stored in a virtual decoded picture buffer (DPB). The maximum capacity of the DPB, in units of frames (or pairs of fields), as shown in parentheses in the right column of the table above, can be computed as follows:
While the best frame for this purpose is usually the previous frame, the extra reference frames can improve compression efficiency and/or video quality. Note that different reference frames can be chosen for different macroblocks in the same frame. The maximum number of concurrent reference frames supported by H.264 is 16.
On fast-motion scenes, a variable bitrate uses more bits than it does on slow-motion scenes of similar duration, yet achieves a consistent visual quality. For real-time and non-buffered video streaming when the available bandwidth is fixed – e.g., in videoconferencing delivered on channels of fixed bandwidth – a constant bitrate (CBR) must ...
The first generation of NVENC, which is shared by all Kepler-based GPUs, supports H.264 high-profile (YUV420, I/P/B frames, CAVLC/CABAC), H.264 SVC Temporal Encode VCE, and Display Encode Mode (DEM). NVidia's documentation states a peak encoder throughput of 8× realtime at a resolution of 1920×1080 (where the baseline "1×" equals 30 Hz).