Use FFmpeg’s concat demuxer to play a text-file playlist in order, and loop the background as a separate input with -stream_loop -1. If you want the background behind the playlist video, combine the two with a filtergraph, then explicitly map the video and audio you want to send to YouTube. The command depends on your files, audio choice and FFmpeg build, so validate it with a test stream before broadcasting.
Choose the right playlist and background setup
This guide assumes “playlist” means a text file listing local media files. FFmpeg’s concat demuxer reads those files consecutively; it does not make an online playlist, directory, or arbitrary feed behave like the same input. The background is a separate video input that repeats while the playlist plays.
- Sequential playback only: use the playlist as the video source. No background composition is needed.
- Playlist video over a background video: use an overlay filtergraph. The playlist is the foreground; the background input sits underneath it.
- Playlist audio with a background image: use the image as the visual layer and choose playlist audio deliberately. Still-image input handling varies by format and FFmpeg build; an image-loop or duration-based input strategy may be more suitable than video looping.
- Different playlist formats: construct an input appropriate to the source rather than treating a streaming URL, directory sequence, and concat list as interchangeable.
The concat demuxer expects the files to have compatible streams, codecs and time bases. Duration estimates can also produce timestamp gaps or artifacts. See the FFmpeg concat demuxer documentation.
Build and check the playlist file
Create a plain-text file such as playlist.txt, with paths to each file in playback order. For example:
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file '/media/part-1.mp4'
file '/media/part-2.mp4'
file '/media/part-3.mp4'Then use the concat demuxer input option -f concat -safe 0 -i playlist.txt. The -safe 0 option permits paths that the demuxer’s safe mode would otherwise reject; use it only when you trust the paths in the file. Keep paths valid from the directory where you run FFmpeg, or use absolute paths.
Before streaming, inspect the files and confirm that they have compatible streams and time bases. If cuts produce freezes, gaps, or timestamp errors, normalize the source files to consistent formats and check duration metadata. FFmpeg’s concat demuxer does not automatically make substantially different media files seamless.
Prepare YouTube’s stream destination
In YouTube Live Control Room, obtain the ingestion address and stream key for the specific broadcast. YouTube’s LiveStreams API reference describes the ingestion address and stream name associated with a live stream. Do not paste a real key into a public command, shared script, or article; use a private placeholder such as YOUR_STREAM_KEY while adapting the examples.
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For an FFmpeg RTMPS workflow, use the RTMPS endpoint and stream name/key provided for your stream. Google documents RTMPS as a secure ingestion option using the rtmps protocol and port 443; endpoint details come from YouTube, so do not substitute a guessed address. See YouTube RTMPS ingestion.
Stream a playlist with a looping background video
The example below overlays the playlist video, resized to fit within a 1920×1080 frame, over a 1920×1080 looping background. It takes audio from the playlist. Replace the background path, playlist path, endpoint and key, and confirm that the chosen resolution and frame rate match your media and YouTube’s current recommendations.
ffmpeg -re
-stream_loop -1 -i /media/background.mp4
-f concat -safe 0 -i /media/playlist.txt
-filter_complex "[0:v]scale=1920:1080:force_original_aspect_ratio=increase,crop=1920:1080[bg];[1:v]scale=1920:1080:force_original_aspect_ratio=decrease[fg];[bg][fg]overlay=(W-w)/2:(H-h)/2:shortest=1[v]"
-map "[v]" -map 1:a?
-c:v libx264 -preset veryfast -b:v 6000k -maxrate 6000k -bufsize 12000k
-r 30 -g 60 -keyint_min 60 -sc_threshold 0
-c:a aac -b:a 128k -ar 44100
-f flv "rtmps://YOUR_YOUTUBE_INGESTION_ENDPOINT/YOUR_STREAM_KEY"This is a documentation-based starting point, not a universal preset or tested command. The 6000k video bitrate is an example only: YouTube’s appropriate bitrate depends on resolution and frame rate. Check the relevant row in YouTube’s current encoder settings, bitrates and resolutions before using a resolution-specific value.
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Understand the input order and loop
FFmpeg numbers inputs in command-line order. Here, input 0 is the background video because -stream_loop -1 appears immediately before its -i; input 1 is the concat playlist. FFmpeg documents -1 as infinite looping for that input. The playlist itself is read consecutively and is not repeated by this option. Consult the FFmpeg documentation for input options, stream selection and complex filtergraphs.
Understand the filter and stream maps
The filtergraph scales and crops the background to fill the output frame, scales the playlist video to fit inside it, then overlays that foreground in the center. If the playlist video should fill the frame instead, change its scaling/cropping strategy. The explicit -map "[v]" selects the composed video, while -map 1:a? selects playlist audio if present; the question mark makes that audio mapping optional if no audio stream exists. If your intent is silence, omit audio mapping and audio encoding rather than assuming an input has sound.
The example uses -re to read the inputs at a real-time rate. Check timing behavior with your actual media. If you want background audio, a separate music input, or audio from a different playlist stream, map and encode that source intentionally; do not map multiple audio streams accidentally.
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Set codec, bitrate and keyframes for YouTube
The example encodes video as H.264 and audio as AAC, formats YouTube documents for RTMP/RTMPS. Its -g 60 and -keyint_min 60 correspond to a two-second interval at -r 30. YouTube recommends a two-second keyframe frequency and says not to exceed four seconds. If you change frame rate, recalculate the GOP length to preserve the intended interval. YouTube also specifies constant-bitrate encoding and lists frame rates up to 60 fps and supported video choices including H.264, HEVC and AV1 for the documented RTMP/RTMPS settings. Use the official settings page for the exact combination you intend to send.
Adapt the workflow to other compositions
Playlist video without a background
If you do not need a visual background, omit the background input and overlay filter. Map the playlist’s intended video and audio streams explicitly, then apply the required codecs, bitrate, keyframe interval and output format. This avoids spending compute on an unnecessary composition.
Background image instead of video
A still image is not a video loop. Choose an image-input method that supplies frames for the stream duration, such as an image loop or a duration-limited input strategy supported by your FFmpeg build. Then use it as the background layer in the filtergraph. Test this separately because still-image input options and timing differ from a looping video file.
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Playlist audio, background audio or silence
Decide on the audio source before building the final maps: playlist audio, background-video audio, a separate audio file, or intentional silence. YouTube’s documented RTMP/RTMPS audio options include AAC or MP3. If combining audio sources, use an audio filtergraph to mix them and manage levels rather than simply mapping both tracks as separate output streams.
RTMP, RTMPS and HLS ingestion
RTMP/RTMPS is the conventional encoder workflow used in the examples. HLS has different segment-based requirements and is not a drop-in replacement for an RTMPS URL. Google’s YouTube ingestion protocol comparison notes that HLS generally has higher latency than RTMP-based ingestion; choose the protocol supported by your channel workflow and current YouTube settings.
Preflight before the intended broadcast
- Resolve paths: confirm every playlist file and the background path exists and is readable by the FFmpeg process.
- Check media compatibility: inspect playlist files for matching stream layouts, codecs and time bases; investigate suspect durations or timestamps if transitions misbehave.
- Check maps and audio: confirm the filtergraph labels the intended background and foreground, and that each mapped audio stream exists or is optional.
- Check encoding and bandwidth: select the bitrate from YouTube’s current resolution/frame-rate guidance and ensure the connection has sufficient sustained upload capacity.
- Connect with current ingestion details: use the endpoint and stream key shown for the actual YouTube stream; keep the key private.
- Run a representative test: test representative motion and audio before the intended broadcast, then inspect YouTube’s stream health. YouTube Help explicitly says, “Make sure to test before you start your live stream.”
Troubleshoot common failures
- “Impossible to open” or missing-file errors: check the working directory, quoted paths and permissions. Use absolute paths to remove ambiguity.
- Concat errors or glitches at file boundaries: compare the files’ streams, codecs and time bases; verify duration metadata and normalize incompatible sources.
- Background does not loop: make sure
-stream_loop -1is before the background input’s-i, not before the playlist input. - Black video or the wrong layer: verify input numbering and filter labels. In the example,
[0:v]is the background and[1:v]is playlist video; map the filter output label. - No audio or an audio-map error: inspect whether the playlist actually contains audio. Keep the optional
?when audio may be absent, or map a deliberate alternate source. - YouTube rejects or reports an unhealthy stream: verify the current endpoint and key, codec, bitrate, resolution, frame rate and keyframe interval against YouTube’s encoder settings, then test again.
- Stuttering or dropped frames: check encoder load and sustained upload capacity; lower resolution or bitrate to a value supported by the current YouTube guidance and your connection.
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