You can stream a sequence of local video files from a Linode instance to YouTube Live with FFmpeg’s concat demuxer. Create a text manifest that lists the files, use the current YouTube ingest URL and stream key, then run FFmpeg on the server. This is not a way to turn a YouTube playlist URL into input files: the workflow below expects media files you control and are authorized to rebroadcast.
What this method does—and what it does not do
FFmpeg’s concat demuxer reads a text file containing file paths and directives, then reads those files sequentially. It does not download videos, resolve a YouTube playlist URL, or grant permission to rebroadcast anything. If you mean a playlist hosted on YouTube, this method does not retrieve its videos; use source files you already have permission to stream.
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A Linode virtual machine can run FFmpeg remotely, so your personal computer does not need to stay on. The server still needs access to the media files, enough CPU if it must encode them, and sufficient outbound network capacity for the stream.
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Prepare the media files and concat manifest
Put authorized files in a stable directory
Upload the videos to the Linode instance or otherwise make them available to it. Keep them in a directory whose paths will not change while the stream is running. Check that FFmpeg can read each file and that the files have compatible stream layouts, codecs, and time bases. The concat demuxer joins sequential inputs; it does not automatically normalize different formats.
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Create the manifest
For example, save this as /srv/media/playlist.ffconcat:
ffconcat version 1.0
file '/srv/media/part-01.mp4'
file '/srv/media/part-02.mp4'Use one file directive for each input, in the order you want it played. The first line identifies the script as an FFmpeg concat script. Quote paths correctly using FFmpeg’s manifest syntax; filenames containing quotes, backslashes, or other special characters need appropriate escaping. Check that every listed path exists and is readable by the account that will run FFmpeg.
The demuxer relies on the inputs having matching streams and uses durations to place later files. Inaccurate or unusual duration metadata can cause timestamp artifacts, gaps, or jumps. If the files have different codecs, stream layouts, or timing that cannot be joined cleanly, use a filter-based concat and transcode workflow instead of assuming this manifest will make them compatible.
Get the YouTube Live ingest details
- In YouTube Studio, open Live Control Room and create or select the stream you intend to use.
- Copy the current server URL and stream key shown for that stream. Prefer the RTMPS endpoint if your FFmpeg build supports it.
- Keep the key private. Do not publish it in a tutorial, screenshot, source repository, or shared log. Avoid putting a real key in a command saved to shell history; use a protected configuration or credential mechanism appropriate to how you run FFmpeg.
RTMPS is RTMP carried over TLS. Use the endpoint and port YouTube currently provides for the stream; do not assume one endpoint or port is universal. Your FFmpeg build must include the output protocol required by that endpoint.
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Run FFmpeg on the Linode instance
Example: transcode to H.264 video and AAC audio
This illustrative command reads the files in real time, encodes video and audio, and sends an FLV-muxed output to a YouTube ingest URL. Replace the endpoint and key placeholders with the values from Live Control Room, without exposing the real key in a published command:
ffmpeg -re -f concat -safe 0 -i /srv/media/playlist.ffconcat
-c:v libx264 -preset veryfast -b:v 2500k -maxrate 2500k -bufsize 5000k
-g 60 -c:a aac -b:a 128k -f flv 'rtmps://CURRENT_YOUTUBE_INGEST/STREAM_KEY'This is an example profile, not a universal YouTube setting or a performance benchmark. Select the resolution, frame rate, video and audio bitrates, codecs, and keyframe interval for the stream you are configuring and the capacity of the instance. YouTube recommends a two-second keyframe interval and constant bitrate for its live encoder settings. The example’s -g 60 corresponds to two seconds only at 30 frames per second; set the GOP size to roughly twice the actual frame rate for a two-second interval. Verify the available codecs and protocols with the FFmpeg build installed on the instance.
-re paces input reading in real time, which is appropriate for sending a prerecorded sequence as a live stream. -safe 0 permits the absolute paths in this manifest; use it only with a manifest you control. The 2500k video bitrate and 128k audio bitrate above are illustrative values, not recommendations for every resolution or frame rate.
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When stream copy may work
If all files have compatible codecs, stream layouts, and time bases, you may be able to avoid decoding and re-encoding by using -c copy. That can reduce CPU demand, but it does not make incompatible inputs compatible. Test the complete sequence before relying on it; if FFmpeg reports concat or timestamp problems, or the output does not play correctly, use a suitable transcode or filter-based workflow.
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Size and test the cloud setup
The appropriate Linode instance size depends on whether FFmpeg is copying streams or re-encoding them, the output resolution and frame rate, and how many jobs run at once. The instance must sustain both the encoding workload and the outbound stream bitrate. There is no single instance size established as right for every input and output profile.
- Confirm the installed FFmpeg has the encoder and RTMP/RTMPS protocol support your command needs.
- Check CPU use during a representative test. If encoding cannot keep pace, lower the workload or choose an instance with more suitable compute capacity.
- Allow outbound connectivity to the actual YouTube ingest endpoint shown in Live Control Room. Keep firewall rules as narrow as your setup permits.
- Budget network upload capacity above the total stream bitrate. YouTube recommends around 20% upload headroom and advises testing and monitoring stream health. For multiple simultaneous outputs, account for the sum of their bitrates.
- Start the stream, check the YouTube preview and stream-health indicators, and verify the event and any archive before depending on it.
Troubleshoot common failures
FFmpeg cannot read the manifest or reports concat errors
Check the manifest’s first line, path spelling, quoting, file permissions, and whether the FFmpeg process can access each file. Confirm that the inputs expose compatible streams and time bases. If the files have different layouts or codecs, use a filter-based concat/transcode workflow rather than relying on the demuxer to normalize them.
The stream connects but playback is broken, silent, or out of sync
Inspect the streams and timestamps in every input. The concat demuxer assumes matching streams and uses file durations to position subsequent inputs, so incorrect duration metadata or inconsistent audio and video can produce artifacts. Test the sequence locally or with a private/unlisted event before using it for a scheduled public stream.
FFmpeg cannot connect to YouTube
Recheck the current server URL and stream key in Live Control Room, including the RTMPS or RTMP scheme and the endpoint port YouTube shows. Confirm that the installed FFmpeg build supports the selected protocol and that outbound network rules permit the connection. Treat the key as compromised and replace it if it has been exposed.
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The stream buffers or drops frames
Check whether the instance is CPU-bound during encoding and whether its outbound capacity has adequate headroom. Lower the output bitrate or resolution, reduce the encoding workload, or move to an instance that can sustain it. Test again and monitor YouTube’s stream-health indicators; no particular Linode size is guaranteed to solve every bottleneck.
Live streaming is unavailable on the account
Check the account’s current live-streaming eligibility and access in YouTube Studio. YouTube says first-time live-streaming activation can take up to 24 hours, so enable and verify access before a time-critical event.
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