Sergey Krashevich
81 lines
3.1 KiB
Markdown
81 lines
3.1 KiB
Markdown
# MJPEG
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**Important.** For a stream in MJPEG format, your source MUST contain the MJPEG codec. If your stream has the MJPEG codec, you can receive an **MJPEG stream** or **JPEG snapshots** via the API.
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You can receive an MJPEG stream in several ways:
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- some cameras support MJPEG codec inside [RTSP stream](#source-rtsp) (ex. second stream for Dahua cameras)
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- some cameras have an HTTP link with [MJPEG stream](#source-http)
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- some cameras have an HTTP link with snapshots - go2rtc can convert them to [MJPEG stream](#source-http)
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- you can convert an H264/H265 stream from your camera via [FFmpeg integration](#source-ffmpeg)
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With this example, your stream will have both H264 and MJPEG codecs:
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```yaml
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streams:
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camera1:
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- rtsp://rtsp:12345678@192.168.1.123/av_stream/ch0
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- ffmpeg:camera1#video=mjpeg
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```
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## API examples
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**MJPEG stream**
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```
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http://192.168.1.123:1984/api/stream.mjpeg?src=camera1
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```
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**JPEG snapshots**
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```
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http://192.168.1.123:1984/api/frame.jpeg?src=camera1
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```
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- You can use `width`/`w` and/or `height`/`h` parameters.
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- You can use `rotate` param with `90`, `180`, `270` or `-90` values.
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- You can use `hardware`/`hw` param [read more](https://github.com/AlexxIT/go2rtc/wiki/Hardware-acceleration).
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- You can use `cache` param (`1m`, `10s`, etc.) to get a cached snapshot.
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- The snapshot is cached only when requested with the `cache` parameter.
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- A cached snapshot will be used if its time is not older than the time specified in the `cache` parameter.
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- The `cache` parameter does not check the image dimensions from the cache and those specified in the query.
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## Stream as ASCII to Terminal
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[](https://www.youtube.com/watch?v=sHj_3h_sX7M)
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**Tips**
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- this feature works only with MJPEG codec (use transcoding)
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- choose a low frame rate (FPS)
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- choose the width and height to fit in your terminal
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- different terminals support different numbers of colors (8, 256, rgb)
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- URL-encode the `text` parameter
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- you can stream any camera or file from disk
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**go2rtc.yaml** - transcoding to MJPEG, terminal size - 210x59 (16/9), fps - 10
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```yaml
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streams:
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gamazda: ffmpeg:gamazda.mp4#video=mjpeg#hardware#width=210#height=59#raw=-r 10
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```
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**API params**
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- `color` - foreground color, values: empty, `8`, `256`, `rgb`, [SGR](https://en.wikipedia.org/wiki/ANSI_escape_code)
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- example: `30` (black), `37` (white), `38;5;226` (yellow)
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- `back` - background color, values: empty, `8`, `256`, `rgb`, [SGR](https://en.wikipedia.org/wiki/ANSI_escape_code)
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- example: `40` (black), `47` (white), `48;5;226` (yellow)
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- `text` - character set, values: empty, one character, `block`, list of chars (in order of brightness)
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- example: `%20` (space), `block` (keyword for block elements), `ox` (two chars)
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**Examples**
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```bash
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% curl "http://192.168.1.123:1984/api/stream.ascii?src=gamazda"
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% curl "http://192.168.1.123:1984/api/stream.ascii?src=gamazda&color=256"
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% curl "http://192.168.1.123:1984/api/stream.ascii?src=gamazda&back=256&text=%20"
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% curl "http://192.168.1.123:1984/api/stream.ascii?src=gamazda&back=8&text=%20%20"
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% curl "http://192.168.1.123:1984/api/stream.ascii?src=gamazda&text=helloworld"
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```
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