I do character superposition equipment, at present most do character superposition equipment is it this way:
Character adder, cameras, hard disk video recorder equipment - show
Is character data to the camera to the camera and then transfer to the back end, so will encounter some content need to do custom with the camera camera manufacturer to accept the character information,

Vision:
The camera - character adder, hard disk video recording equipment, display
Don't need a camera to make any changes, the camera will video character adder to handle bag to and then passed on to the backend

Technical direction:
Camera video format for general h264 encoding, use RTP package, passed to the backend (so I understand)
Add character adder, accept video package, and then the video inside the package to join character data, in the transmission to the backend equipment
Here need to unpack RTP packets, then to the H264 encoding and join the character data, and then use RTP packaging,
Because it is used on prevention, so video real-time transmission, can allow a delay, but can't do to have saved video processing, namely save video is processing good,
Due to convection media for H264 is not familiar with, so I want to know, the idea can achieve?
In what way to join in H264 encoding character data, need to decode the H264?
Do you have a reference solution

CodePudding user response:

Only after decoding data Riga, is on display

CodePudding user response:

You need a transcoding server, it is responsible for the RTP, 264, superposition of text, call 264, RTP,
Have special selling this equipment, you look for,

CodePudding user response:

Software algorithm realization, there is a corresponding amount of ffmpeg implementation
Hardware have special graphic processing equipment can complete stack

CodePudding user response:

Whatever solution, is to receive the camera after 264 data, decoding, superposition character data, then data encoded into 264

Like before I wrote a superposition of the OSD blog,

https://blog.csdn.net/machh/article/details/52840886

CodePudding user response:

Superposition of decoding and feasible, but the efficiency is low, I remember now have the IPC directly can stack up in the front, the IPC is procured directly stack should be of the highest efficiency

CodePudding user response:

Another solution is to need not decoding, directly on the display side using the OSD technology real-time overlay on the screen

CodePudding user response:

You can go to see my blog, record video while writing soft subtitles, can realize you this feature

CodePudding user response:

Hello, your video superposition is done?
QQ can discuss?

CodePudding user response:

Before this can use DIRECDRAW, into a bitmap, done, communicate Q: 1049568282