Beginner

Quick introduction to using the core API and FFmpeg processes.

Guide content

Starting the Core container
Configure and restart the Core
Creating, verifying, updating, and deleting an FFmpeg process
Using placeholders for the in-memory file system and RTMP server
Analyze FFmpeg process errors

1. Start the Core

docker run --detach --name core --publish 8080:8080 datarhei/core:latest

2. Enable the RTMP server on the Core

Configuring the Core via the API
Restarting the Core via the API and loading the changed configuration
Calling the RTMP API

2.1 Changing the Configuration

curl http://127.0.0.1:8080/api/v3/config \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X PUT \
   -d '{
         "version": 3,
         "rtmp": {
            "enable": true
         }
      }'

"OK"

API Documentation > Configuration

Config

2.2 Apply the change

curl http://127.0.0.1:8080/api/v3/config/reload \
    -X GET

"OK"

2.3 Checking the RTMP server

curl http://127.0.0.1:8080/api/v3/rtmp \
    -X GET

[]

3. Main-process

Initiating the main-process using the Process API
Check the main-process via the Process API
Update the main-process via the Process API
Check the change of the main-process via the Process API
Monitor the RTMP stream via the RTMP API

3.1 Create the FFmpeg process

curl http://127.0.0.1:8080/api/v3/process \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X POST \
   -d '{
         "id": "main",
         "options": [],
         "input": [
            {
               "address": "testsrc=size=1280x720:rate=25",
               "id": "0",
               "options": ["-f", "lavfi", "-re"]
            }
         ],
         "output": [
            {
               "address": "-",
               "id": "0",
               "options": ["-c:v", "libx264", "-f", "null"]
            }
         ],
         "autostart": true,
         "reconnect": true,
         "reconnect_delay_seconds": 10,
         "stale_timeout_seconds": 10
      }'

The configuration creates a process with a virtual video input with no output.

{
    "id": "main",
    "type": "ffmpeg",
    "reference": "",
    "input": [{
        "id": "0",
        "address": "testsrc=size=1280x720:rate=25",
        "options": ["-f", "lavfi", "-re"]
    }],
    "output": [{
        "id": "0",
        "address": "-",
        "options": ["-c:v", "libx264", "-f", "null"]
    }],
    "options": [],
    "reconnect": true,
    "reconnect_delay_seconds": 10,
    "autostart": true,
    "stale_timeout_seconds": 10,
    "limits": {
        "cpu_usage": 0,
        "memory_mbytes": 0,
        "waitfor_seconds": 0
    }
}

API Documentation > FFmpeg processing

Process

3.2 Check that the FFmpeg process is running

curl http://127.0.0.1:8080/api/v3/process/main/state \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GET

{
    "order": "start",
    "exec": "running",
    "runtime_seconds": 36,
    "reconnect_seconds": -1,
    "last_logline": "ffmpeg.mapping:{\"graphs\":[{\"index\":0,\"graph\":[{\"src_name\":\"Parsed_null_0\",\"src_filter\":\"null\",\"dst_name\":\"auto_scale_0\",\"dst_filter\":\"scale\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"rgb24\",\"width\":1280,\"height\":720},{\"src_name\":\"graph 0 input from stream 0:0\",\"src_filter\":\"buffer\",\"dst_name\":\"Parsed_null_0\",\"dst_filter\":\"null\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"rgb24\",\"width\":1280,\"height\":720},{\"src_name\":\"format\",\"src_filter\":\"format\",\"dst_name\":\"out_0_0\",\"dst_filter\":\"buffersink\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720},{\"src_name\":\"auto_scale_0\",\"src_filter\":\"scale\",\"dst_name\":\"format\",\"dst_filter\":\"format\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720}]}],\"mapping\":[{\"input\":{\"index\":0,\"stream\":0},\"graph\":{\"index\":0,\"name\":\"graph 0 input from stream 0:0\"},\"output\":null},{\"input\":null,\"graph\":{\"index\":0,\"name\":\"out_0_0\"},\"output\":{\"index\":0,\"stream\":0}}]}",
    "progress": {
        "inputs": [{
            "id": "0",
            "address": "testsrc=size=1280x720:rate=25",
            "index": 0,
            "stream": 0,
            "format": "lavfi",
            "type": "video",
            "codec": "rawvideo",
            "coder": "rawvideo",
            "frame": 910,
            "fps": 25.267,
            "packet": 910,
            "pps": 25.267,
            "size_kb": 2457000,
            "bitrate_kbit": 545760.000,
            "pix_fmt": "rgb24",
            "q": 0.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "outputs": [{
            "id": "0",
            "address": "pipe:",
            "index": 0,
            "stream": 0,
            "format": "null",
            "type": "video",
            "codec": "h264",
            "coder": "libx264",
            "frame": 910,
            "fps": 25.267,
            "packet": 860,
            "pps": 25.267,
            "size_kb": 332,
            "bitrate_kbit": 76.800,
            "pix_fmt": "yuv444p",
            "q": 28.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "frame": 910,
        "packet": 860,
        "fps": 25.267,
        "q": 28,
        "size_kb": 332,
        "time": 34.320,
        "bitrate_kbit": 76.800,
        "speed": 0.943,
        "drop": 0,
        "dup": 0
    },
    "memory_bytes": 427692032,
    "cpu_usage": 22.015,
    "command": ["-f", "lavfi", "-re", "-i", "testsrc=size=1280x720:rate=25", "-c:v", "libx264", "-f", "null", "-"]
}

The process is running if the exec state in the response is running and the progress.packet is increasing.

3.3 Update the FFmpeg process

curl http://127.0.0.1:8080/api/v3/process/main \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X PUT \
   -d '{
         "id": "main",
         "options": [],
         "input": [
            {
               "address": "testsrc=size=1280x720:rate=25",
               "id": "0",
               "options": ["-f", "lavfi", "-re"]
            }
         ],
         "output": [
            {
               "address": "{rtmp,name=main}",
               "id": "0",
               "options": ["-c:v", "libx264", "-f", "flv"]
            }
         ],
         "autostart": true,
         "reconnect": true,
         "reconnect_delay_seconds": 10,
         "stale_timeout_seconds": 10
      }'

This configuration creates an RTMP stream as output and sends it to the internal RTMP server. It uses the {rtmp} placeholder for ease of integration.

{
    "id": "main",
    "type": "ffmpeg",
    "reference": "",
    "input": [{
        "id": "0",
        "address": "testsrc=size=1280x720:rate=25",
        "options": ["-f", "lavfi", "-re"]
    }],
    "output": [{
        "id": "0",
        "address": "{rtmp,name=main}",
        "options": ["-c:v", "libx264", "-f", "flv"]
    }],
    "options": [],
    "reconnect": true,
    "reconnect_delay_seconds": 10,
    "autostart": true,
    "stale_timeout_seconds": 10,
    "limits": {
        "cpu_usage": 0,
        "memory_mbytes": 0,
        "waitfor_seconds": 0
    }
}

3.4 Check that the FFmpeg process is running again

curl http://127.0.0.1:8080/api/v3/process/main/state \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GET

{
    "order": "start",
    "exec": "running",
    "runtime_seconds": 32,
    "reconnect_seconds": -1,
    "last_logline": "ffmpeg.mapping:{\"graphs\":[{\"index\":0,\"graph\":[{\"src_name\":\"Parsed_null_0\",\"src_filter\":\"null\",\"dst_name\":\"auto_scale_0\",\"dst_filter\":\"scale\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"rgb24\",\"width\":1280,\"height\":720},{\"src_name\":\"graph 0 input from stream 0:0\",\"src_filter\":\"buffer\",\"dst_name\":\"Parsed_null_0\",\"dst_filter\":\"null\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"rgb24\",\"width\":1280,\"height\":720},{\"src_name\":\"format\",\"src_filter\":\"format\",\"dst_name\":\"out_0_0\",\"dst_filter\":\"buffersink\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720},{\"src_name\":\"auto_scale_0\",\"src_filter\":\"scale\",\"dst_name\":\"format\",\"dst_filter\":\"format\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/25\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720}]}],\"mapping\":[{\"input\":{\"index\":0,\"stream\":0},\"graph\":{\"index\":0,\"name\":\"graph 0 input from stream 0:0\"},\"output\":null},{\"input\":null,\"graph\":{\"index\":0,\"name\":\"out_0_0\"},\"output\":{\"index\":0,\"stream\":0}}]}",
    "progress": {
        "inputs": [{
            "id": "0",
            "address": "testsrc=size=1280x720:rate=25",
            "index": 0,
            "stream": 0,
            "format": "lavfi",
            "type": "video",
            "codec": "rawvideo",
            "coder": "rawvideo",
            "frame": 796,
            "fps": 24.833,
            "packet": 796,
            "pps": 24.833,
            "size_kb": 2149200,
            "bitrate_kbit": 536400.000,
            "pix_fmt": "rgb24",
            "q": 0.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "outputs": [{
            "id": "0",
            "address": "rtmp://localhost:1935/main",
            "index": 0,
            "stream": 0,
            "format": "flv",
            "type": "video",
            "codec": "h264",
            "coder": "libx264",
            "frame": 796,
            "fps": 24.833,
            "packet": 746,
            "pps": 24.833,
            "size_kb": 284,
            "bitrate_kbit": 73.600,
            "pix_fmt": "yuv444p",
            "q": 25.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "frame": 796,
        "packet": 746,
        "fps": 24.833,
        "q": 25,
        "size_kb": 284,
        "time": 29.720,
        "bitrate_kbit": 73.600,
        "speed": 0.934,
        "drop": 0,
        "dup": 0
    },
    "memory_bytes": 428478464,
    "cpu_usage": 18.249,
    "command": ["-f", "lavfi", "-re", "-i", "testsrc=size=1280x720:rate=25", "-c:v", "libx264", "-f", "flv", "rtmp://localhost:1935/main"]
}

3.5 Check that the RTMP stream is available

curl http://127.0.0.1:8080/api/v3/rtmp \
    -X GET

[{
    "name": "/main"
}]

Now you can pull the stream from the RTMP server with the URL rtmp://127.0.0.1:1935/main.

API Documentation > RTMP

RTMP

4. Sub-process

Initiate the sub-process through the Process API
Check the sub-process through the Process API
Monitor the HLS stream via the file system API

4.1 Create the FFmpeg process

curl http://127.0.0.1:8080/api/v3/process \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X POST \
   -d '{
         "id": "sub",
         "options": [],
         "input": [
            {
               "address": "{rtmp,name=main}",
               "id": "0",
               "options": []
            }
         ],
         "output": [
            {
               "address": "{memfs}/{processid}.m3u8",
               "id": "0",
               "options": ["-f", "hls"]
            }
         ],
         "autostart": true,
         "reconnect": true,
         "reconnect_delay_seconds": 10,
         "stale_timeout_seconds": 10
      }'

This configuration uses the RTMP stream from the main-process and creates an HLS stream as an output on the internal in-memory file system. It uses the {memfs} placeholder for ease of integration.

{
    "id": "sub",
    "type": "ffmpeg",
    "reference": "",
    "input": [{
        "id": "0",
        "address": "{rtmp,name=main}",
        "options": []
    }],
    "output": [{
        "id": "0",
        "address": "{memfs}/{processid}.m3u8",
        "options": ["-f", "hls"]
    }],
    "options": [],
    "reconnect": true,
    "reconnect_delay_seconds": 10,
    "autostart": true,
    "stale_timeout_seconds": 10,
    "limits": {
        "cpu_usage": 0,
        "memory_mbytes": 0,
        "waitfor_seconds": 0
    }
}

4.2 Check that the FFmpeg process is running

curl http://127.0.0.1:8080/api/v3/process/sub/state \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GET

{
    "order": "start",
    "exec": "running",
    "runtime_seconds": 31,
    "reconnect_seconds": -1,
    "last_logline": "[hls @ 0x7fbf1e8fd340] Opening 'http://admin:irIVvk4miq3JhKGZnY@localhost:8080/memfs/sub_22.ts' for writing",
    "progress": {
        "inputs": [{
            "id": "0",
            "address": "rtmp://localhost:1935/main",
            "index": 0,
            "stream": 0,
            "format": "flv",
            "type": "video",
            "codec": "h264",
            "coder": "h264",
            "frame": 828,
            "fps": 29.704,
            "packet": 834,
            "pps": 29.926,
            "size_kb": 322,
            "bitrate_kbit": 93.037,
            "pix_fmt": "yuv444p",
            "q": 0.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "outputs": [{
            "id": "0",
            "address": "http://admin:irIVvk4miq3JhKGZnY@localhost:8080/memfs/sub.m3u8",
            "index": 0,
            "stream": 0,
            "format": "hls",
            "type": "video",
            "codec": "h264",
            "coder": "libx264",
            "frame": 828,
            "fps": 29.704,
            "packet": 778,
            "pps": 27.852,
            "size_kb": 322,
            "bitrate_kbit": 92.741,
            "pix_fmt": "yuv444p",
            "q": 28.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "frame": 828,
        "packet": 778,
        "fps": 29.704,
        "q": 28,
        "size_kb": 322,
        "time": 31.400,
        "bitrate_kbit": 92.741,
        "speed": 1.100,
        "drop": 0,
        "dup": 0
    },
    "memory_bytes": 467107840,
    "cpu_usage": 18.008,
    "command": ["-i", "rtmp://localhost:1935/main", "-f", "hls", "http://admin:irIVvk4miq3JhKGZnY@localhost:8080/memfs/sub.m3u8"]
}

4.3 Check that the HLS stream is available

curl http://127.0.0.1:8080/api/v3/fs/mem \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GET

[{
    "name": "/sub0.ts",
    "size_bytes": 143444,
    "last_modified": 1674208099
}, {
    "name": "/sub1.ts",
    "size_bytes": 139684,
    "last_modified": 1674208109
}, {
    "name": "/sub2.ts",
    "size_bytes": 144008,
    "last_modified": 1674208119
}, {
    "name": "/sub3.ts",
    "size_bytes": 143068,
    "last_modified": 1674208129
}, {
    "name": "/sub4.ts",
    "size_bytes": 141376,
    "last_modified": 1674208139
}, {
    "name": "/sub5.ts",
    "size_bytes": 142504,
    "last_modified": 1674208149
}, {
    "name": "/sub6.ts",
    "size_bytes": 143068,
    "last_modified": 1674208159
}, {
    "name": "/sub7.ts",
    "size_bytes": 141376,
    "last_modified": 1674208169
}, {
    "name": "/sub8.ts",
    "size_bytes": 142504,
    "last_modified": 1674208179
}, {
    "name": "/sub9.ts",
    "size_bytes": 143256,
    "last_modified": 1674208189
}, {
    "name": "/sub.m3u8",
    "size_bytes": 209,
    "last_modified": 1674208189
}]json

Now you can pull the stream from the in-memory filesystem with the URL http://127.0.0.1:8080/memfs/sub.m3u8.

API Documentation > Filesystem > In-Memory

In-memory

5. Analyze process failers

Stop the main-process through the Process API
Check the sub-process via process API
Analyze the sub-process log report via the Process API
Start the main-process through the Process API
Check the sub-process through the Process API

5.1 Create an error on the video input of the sub-process

curl http://127.0.0.1:8080/api/v3/process/main/command \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X PUT \
   -d '{"command": "stop"}'

This command stops the running main-process and interrupts the RTMP stream.

"OK"

5.2 Check the status of the sub-process

curl http://127.0.0.1:8080/api/v3/process/sub/state \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GET

{
    "order": "start",
    "exec": "failed",
    "runtime_seconds": 6,
    "reconnect_seconds": 3,
    "last_logline": "rtmp://localhost:1935/main: Broken pipe",
    "progress": {
        "inputs": [],
        "outputs": [],
        "frame": 0,
        "packet": 0,
        "fps": 0,
        "q": 0,
        "size_kb": 0,
        "time": 0,
        "bitrate_kbit": 0,
        "speed": 0,
        "drop": 0,
        "dup": 0
    },
    "memory_bytes": 0,
    "cpu_usage": 0,
    "command": ["-i", "rtmp://localhost:1935/main", "-f", "hls", "http://admin:irIVvk4miq3JhKGZnY@localhost:8080/memfs/sub.m3u8"]
}

If a process has the order=start, does not return exec=running, and progress.packet is not ascending or >0, it indicates an error.

5.3 Analyze the sub-process report

curl http://127.0.0.1:8080/api/v3/process/sub/report \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GE

{
    "created_at": 1674134954,
    "prelude": ["ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared", "  libavutil      57. 28.100 / 57. 28.100", "  libavcodec     59. 37.100 / 59. 37.100", "  libavformat    59. 27.100 / 59. 27.100", "  libavdevice    59.  7.100 / 59.  7.100", "  libavfilter     8. 44.100 /  8. 44.100", "  libswscale      6.  7.100 /  6.  7.100", "  libswresample   4.  7.100 /  4.  7.100", "  libpostproc    56.  6.100 / 56.  6.100", "rtmp://localhost:1935/main: Broken pipe"],
    "log": [
        ["1674134954", "ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers"],
        ["1674134954", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219"],
        ["1674134954", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared"],
        ["1674134954", "  libavutil      57. 28.100 / 57. 28.100"],
        ["1674134954", "  libavcodec     59. 37.100 / 59. 37.100"],
        ["1674134954", "  libavformat    59. 27.100 / 59. 27.100"],
        ["1674134954", "  libavdevice    59.  7.100 / 59.  7.100"],
        ["1674134954", "  libavfilter     8. 44.100 /  8. 44.100"],
        ["1674134954", "  libswscale      6.  7.100 /  6.  7.100"],
        ["1674134954", "  libswresample   4.  7.100 /  4.  7.100"],
        ["1674134954", "  libpostproc    56.  6.100 / 56.  6.100"],
        ["1674134954", "rtmp://localhost:1935/main: Broken pipe"]
    ],
    "history": [{
        "created_at": 1674134924,
        "prelude": ["ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared", "  libavutil      57. 28.100 / 57. 28.100", "  libavcodec     59. 37.100 / 59. 37.100", "  libavformat    59. 27.100 / 59. 27.100", "  libavdevice    59.  7.100 / 59.  7.100", "  libavfilter     8. 44.100 /  8. 44.100", "  libswscale      6.  7.100 /  6.  7.100", "  libswresample   4.  7.100 /  4.  7.100", "  libpostproc    56.  6.100 / 56.  6.100", "rtmp://localhost:1935/main: I/O error"],
        "log": [
            ["1674134924", "ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers"],
            ["1674134924", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219"],
            ["1674134924", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared"],
            ["1674134924", "  libavutil      57. 28.100 / 57. 28.100"],
            ["1674134924", "  libavcodec     59. 37.100 / 59. 37.100"],
            ["1674134924", "  libavformat    59. 27.100 / 59. 27.100"],
            ["1674134924", "  libavdevice    59.  7.100 / 59.  7.100"],
            ["1674134924", "  libavfilter     8. 44.100 /  8. 44.100"],
            ["1674134924", "  libswscale      6.  7.100 /  6.  7.100"],
            ["1674134924", "  libswresample   4.  7.100 /  4.  7.100"],
            ["1674134924", "  libpostproc    56.  6.100 / 56.  6.100"],
            ["1674134924", "rtmp://localhost:1935/main: I/O error"]
        ]
    }, {
        "created_at": 1674134934,
        "prelude": ["ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared", "  libavutil      57. 28.100 / 57. 28.100", "  libavcodec     59. 37.100 / 59. 37.100", "  libavformat    59. 27.100 / 59. 27.100", "  libavdevice    59.  7.100 / 59.  7.100", "  libavfilter     8. 44.100 /  8. 44.100", "  libswscale      6.  7.100 /  6.  7.100", "  libswresample   4.  7.100 /  4.  7.100", "  libpostproc    56.  6.100 / 56.  6.100", "rtmp://localhost:1935/main: Broken pipe"],
        "log": [
            ["1674134934", "ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers"],
            ["1674134934", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219"],
            ["1674134934", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared"],
            ["1674134934", "  libavutil      57. 28.100 / 57. 28.100"],
            ["1674134934", "  libavcodec     59. 37.100 / 59. 37.100"],
            ["1674134934", "  libavformat    59. 27.100 / 59. 27.100"],
            ["1674134934", "  libavdevice    59.  7.100 / 59.  7.100"],
            ["1674134934", "  libavfilter     8. 44.100 /  8. 44.100"],
            ["1674134934", "  libswscale      6.  7.100 /  6.  7.100"],
            ["1674134934", "  libswresample   4.  7.100 /  4.  7.100"],
            ["1674134934", "  libpostproc    56.  6.100 / 56.  6.100"],
            ["1674134934", "rtmp://localhost:1935/main: Broken pipe"]
        ]
    }, {
        "created_at": 1674134944,
        "prelude": ["ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared", "  libavutil      57. 28.100 / 57. 28.100", "  libavcodec     59. 37.100 / 59. 37.100", "  libavformat    59. 27.100 / 59. 27.100", "  libavdevice    59.  7.100 / 59.  7.100", "  libavfilter     8. 44.100 /  8. 44.100", "  libswscale      6.  7.100 /  6.  7.100", "  libswresample   4.  7.100 /  4.  7.100", "  libpostproc    56.  6.100 / 56.  6.100", "rtmp://localhost:1935/main: I/O error"],
        "log": [
            ["1674134944", "ffmpeg version 5.1.2-datarhei Copyright (c) 2000-2022 the FFmpeg developers"],
            ["1674134944", "  built with gcc 11.2.1 (Alpine 11.2.1_git20220219) 20220219"],
            ["1674134944", "  configuration: --extra-version=datarhei --prefix=/usr --extra-libs='-lpthread -lxml2 -lm -lz -lsupc++ -lstdc++ -lssl -lcrypto -lz -lc -ldl' --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-static --enable-openssl --enable-libxml2 --enable-libv4l2 --enable-v4l2_m2m --enable-libfreetype --enable-libsrt --enable-libx264 --enable-libx265 --enable-libvpx --enable-libmp3lame --enable-libopus --enable-libvorbis --disable-ffplay --disable-debug --disable-doc --disable-shared"],
            ["1674134944", "  libavutil      57. 28.100 / 57. 28.100"],
            ["1674134944", "  libavcodec     59. 37.100 / 59. 37.100"],
            ["1674134944", "  libavformat    59. 27.100 / 59. 27.100"],
            ["1674134944", "  libavdevice    59.  7.100 / 59.  7.100"],
            ["1674134944", "  libavfilter     8. 44.100 /  8. 44.100"],
            ["1674134944", "  libswscale      6.  7.100 /  6.  7.100"],
            ["1674134944", "  libswresample   4.  7.100 /  4.  7.100"],
            ["1674134944", "  libpostproc    56.  6.100 / 56.  6.100"],
            ["1674134944", "rtmp://localhost:1935/main: I/O error"]
        ]
    }]
}

The current and the last three process logs are available in the report.

The log entries in the response

rtmp://localhost:1935/main: Broken pipe
rtmp://localhost:1935/main I/O error

indicate that the video source is unreachable, so the process fails.

5.4 Fix the process failer

curl http://127.0.0.1:8080/api/v3/process/main/command \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X PUT \
   -d '{"command":"start"}'

This command enables the main-process again.

"OK"

5.5 Verify the fix

curl http://127.0.0.1:8080/api/v3/process/sub/state \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X GET

{
    "order": "start",
    "exec": "running",
    "runtime_seconds": 1,
    "reconnect_seconds": -1,
    "last_logline": "ffmpeg.mapping:{\"graphs\":[{\"index\":0,\"graph\":[{\"src_name\":\"Parsed_null_0\",\"src_filter\":\"null\",\"dst_name\":\"format\",\"dst_filter\":\"format\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/1000\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720},{\"src_name\":\"graph 0 input from stream 0:0\",\"src_filter\":\"buffer\",\"dst_name\":\"Parsed_null_0\",\"dst_filter\":\"null\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/1000\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720},{\"src_name\":\"format\",\"src_filter\":\"format\",\"dst_name\":\"out_0_0\",\"dst_filter\":\"buffersink\",\"inpad\":\"default\",\"outpad\":\"default\",\"timebase\": \"1/1000\",\"type\":\"video\",\"format\":\"yuv444p\",\"width\":1280,\"height\":720}]}],\"mapping\":[{\"input\":{\"index\":0,\"stream\":0},\"graph\":{\"index\":0,\"name\":\"graph 0 input from stream 0:0\"},\"output\":null},{\"input\":null,\"graph\":{\"index\":0,\"name\":\"out_0_0\"},\"output\":{\"index\":0,\"stream\":0}}]}",
    "progress": {
        "inputs": [{
            "id": "0",
            "address": "rtmp://localhost:1935/main",
            "index": 0,
            "stream": 0,
            "format": "flv",
            "type": "video",
            "codec": "h264",
            "coder": "h264",
            "frame": 116,
            "fps": 0.000,
            "packet": 122,
            "pps": 0.000,
            "size_kb": 51,
            "bitrate_kbit": 0.000,
            "pix_fmt": "yuv444p",
            "q": 0.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "outputs": [{
            "id": "0",
            "address": "http://admin:irIVvk4miq3JhKGZnY@localhost:8080/memfs/sub.m3u8",
            "index": 0,
            "stream": 0,
            "format": "hls",
            "type": "video",
            "codec": "h264",
            "coder": "libx264",
            "frame": 116,
            "fps": 0.000,
            "packet": 66,
            "pps": 0.000,
            "size_kb": 34,
            "bitrate_kbit": 0.000,
            "pix_fmt": "yuv444p",
            "q": 28.000,
            "width": 1280,
            "height": 720,
            "avstream": null
        }],
        "frame": 116,
        "packet": 66,
        "fps": 0,
        "q": 28,
        "size_kb": 34,
        "time": 2.560,
        "bitrate_kbit": 0,
        "speed": 2.520,
        "drop": 0,
        "dup": 0
    },
    "memory_bytes": 463351808,
    "cpu_usage": 0,
    "command": ["-i", "rtmp://localhost:1935/main", "-f", "hls", "http://admin:irIVvk4miq3JhKGZnY@localhost:8080/memfs/sub.m3u8"]
}

The exec status in the response is running again.

6. Cleanup

Stops and deletes the sub-process via the Process API
Stops and deletes the main-process via the Process API

6.1 Delete the sub-process

curl http://127.0.0.1:8080/api/v3/process/sub \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X DELETE

"OK"

6.2 Delete the main-process

curl http://127.0.0.1:8080/api/v3/process/main \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X DELETE

"OK"

6.3 Stop the Core

docker kill core

docker rm core

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