10 Basic Design Patterns

 




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FFMPEG Deinterlacing Modes

FFMPEG has multiple supported deinterlacing filters.  Here they are: 10.14 bwdif Deinterlace the input video ("bwdif" stands for "Bob Weaver Deinterlacing Filter"). Motion adaptive deinterlacing based on yadif with the use of w3fdif and cubic interpolation algorithms. It accepts the following parameters: mode The interlacing mode to adopt. It accepts one of the following values: 0, send_frame Output one frame for each frame. 1, send_field Output one frame for each field. The default value is send_field. parity The picture field parity assumed for the input interlaced video. It accepts one of the following values: 0, tff Assume the top field is first. 1, bff Assume the bottom field is first. -1, auto Enable automatic detection of field parity. The default value is auto. If the interlacing is unknown or the decoder does not export this information, top field first will be assumed. deint Specify which frames to deinterlace. Accept ...
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HDR Research

Overview We are looking at what it would take to encode HDR-10 and Dolby Vision videos using an AVC/HEVC encoder. HDR-10 : 10-bit HDR, BT.2020, PQ transfer function, static metadata Dolby Vision : 12-bit HDR (10bit YUV + deltas defined in metadata = 12 bit), BT.2020, PQ transfer function, Dolby Vision dynamic metadata  What is HDR-10? From  this  paper, we have gleaned the following: Essentially, HDR-10 is defined as the combination of the following container and coding characteristics: Color container/primaries: BT.2020 PQ Transfer function (OETF/EOTF): SMPTE ST 2084 Representation: Non Constant Luminance (NCL) YCbCr Sampling: 4:2:0 Bit Depth: 10 bits Metadata: SMPTE ST 2086, MaxFALL, MaxCLL,  AVC/HEVC Supplemental enhancement information (SEI) Messages. Encoding using: HEVC Main 10 profile or AVC High 10. The AVC/HEVC specifications support all of these features as well as metadata (SEI) that can specify the mastering and brightness limitat...
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Remote debugging with GDB and GDBServer on Alpine and Visual Studio Code

Skip to end of metadata o to start of metadata gdb and gdbserver can be used in combination to provide debugging capabilities over the network.   gdbserver  is run on the machine you want to debug.   gdb  is run on the machine you want to debug from, usually your local machine. More  here . Before we get started, we need some software.  Alpine 3.8 will be the gdbserver. NFS We will be using nfs (Network File System) to mount a remote directory and have it look like a local directory.  We will cd to the nfs mounted directory which contains the program we want to debug before we launch gdb.  This way the program and symbols will match.  gdb will be running on your local client, but it will be launched when in a directory on the gdbserver's system. More than you wanted to know about  nfs . To set up nfs, you will need nfs software on your server and your client. SERVER  (Your Alpine machine) - Ad...
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