For a normal stereo 24/7 devotional YouTube stream, use AAC audio at 128 kbps and 44.1 kHz. In FFmpeg, set those values with -c:a aac -b:a 128k -ar 44100; the source, video settings, ingest details and ongoing monitoring still need to be checked separately.
The devotional format does not call for a special bitrate. Choose settings according to the audio channel layout and YouTube’s live ingest guidance, then test the actual programme mix. A value that suits stereo bhajans is not automatically right for a mono feed or a true 5.1 mix.
Start with the audio layout
Before changing FFmpeg options, determine whether the audio you are sending is stereo, mono or genuine 5.1 surround. A file may contain two channels even if it was assembled from several tracks, and a devotional programme does not become surround audio simply because it includes instruments, chorus or room ambience. The encoded channel layout should reflect the source and the mix you intend viewers to hear.
For ordinary stereo, YouTube’s live encoder settings recommend AAC at 128 kbps and 44.1 kHz. That is a practical baseline for a bhajan playlist, a temple programme or a recorded devotional loop with left and right channels. There is no reason to choose a different bitrate solely because the stream is intended to run all day and night.
YouTube gives a separate recommendation for 5.1 surround: 384 kbps at 48 kHz, and its RTMP/RTMPS guidance lists 5.1 as AAC-only. Use those figures only when the programme really is mixed and delivered as 5.1. Applying the surround rate to a stereo file does not turn it into a surround production.
The cited live settings guidance does not give a separate mono recommendation. If your source is mono, do not assume that a stereo figure is automatically the best setting. Confirm how the source is mapped, inspect the encoded output and listen to a representative test before using the configuration for a continuous broadcast.
| Audio layout | YouTube live recommendation | Practical use |
|---|---|---|
| Stereo | AAC, 128 kbps, 44.1 kHz | A straightforward baseline for a typical two-channel programme |
| True 5.1 surround | AAC, 384 kbps, 48 kHz | Only when both the source mix and delivery path are actually 5.1 |
| Mono or another layout | No separate mono figure in the cited guidance | Check the intended channel mapping and test the encoded result |
These are live ingest recommendations, not upload settings to copy blindly. YouTube can update its help pages or Live Control Room options, so check the current settings for the channel before a production change. For a wider view of the video side of a continuous loop, the guide to keeping a Hindi devotional playlist live on YouTube covers a related operational setup.
What YouTube recommends for RTMP and RTMPS
For live streaming over RTMP or RTMPS, YouTube lists AAC and MP3 as supported audio codecs. AAC is the sensible choice for the command below because it is the codec used in the stereo and 5.1 recommendations. YouTube recommends RTMPS, a secure extension of RTMP; use the ingest method and destination currently shown in your own Live Control Room rather than reusing an old URL from notes.
The key distinction is between the platform recommendation and the encoder’s implementation. YouTube specifies the target audio characteristics for the live stream. FFmpeg’s native AAC encoder then applies its own documented options to produce audio with the requested bitrate and sample rate. If you select a different encoder in your installed FFmpeg build, consult that encoder’s documentation rather than assuming the options behave identically.
YouTube also recommends constant bitrate for stream encoding. With FFmpeg’s native aac encoder, specifying -b:a activates constant bitrate mode for that audio encoder. This is an encoder-specific behaviour; it should not be treated as proof that every part of a larger audio/video pipeline is configured correctly. The video encoder, muxing, total bitrate and network path remain separate considerations.
Keep live guidance distinct from file-upload advice. A recommendation for a video uploaded to YouTube is not automatically evidence for an RTMP/RTMPS live stream. The official live encoder settings and bitrate guidance is the reference for the current ingest recommendation; check it again when planning changes.
Set AAC bitrate and sample rate in FFmpeg
In FFmpeg, -b:a sets the audio encoder bitrate. The value 128k means 128 kilobits per second. The -ar 44100 option sets the output audio sample rate to 44.1 kHz. -c:a aac selects FFmpeg’s native AAC encoder.
A cautious example, assuming that the input video is suitable for stream copy, is:
ffmpeg -re -i input.mp4 \\
-c:v copy \\
-c:a aac -b:a 128k -ar 44100 \\
-f flv 'rtmps://YOUR_YOUTUBE_INGEST_ADDRESS/YOUR_STREAM_KEY'
The example is not a universal command to paste and run unchanged. Replace input.mp4 with the actual source path and replace the destination placeholder with the ingest address and stream key supplied for your broadcast. The exact video handling depends on the source and intended output; -c:v copy is addressed separately below because it is conditional.
FFmpeg’s native AAC encoder documents the b option as activating constant bitrate mode when specified. Although the documented default is 128 kbps, writing -b:a 128k explicitly is useful: someone reviewing the command can see the intended setting without relying on defaults. FFmpeg’s official option documentation describes bitrate in bits per second and explains encoder options; behaviour may differ if you choose another AAC encoder.
The option order matters. Input options describe the input, while output options configure the output that follows. In this example, -re -i input.mp4 identifies the source and reads it at a rate suitable for real-time streaming; the codec and audio options come after the input and before the destination. When adapting a command, keep the output options with the output they are meant to configure.
Stream copy is conditional, not a default
The sample command copies video with -c:v copy instead of decoding and re-encoding it. This can avoid an unnecessary video encode, but it is appropriate only when the source video codec and container path are compatible with the chosen output. A file that plays on your computer is not, by itself, proof that its video can be passed through unchanged to the live ingest.
Check the source’s codec and container, and confirm that the resulting FLV output is suitable for the YouTube ingest settings you are using. If the video codec or packaging is incompatible, copying may fail or produce a stream that does not behave as intended. In that case, choose video encoding options that fit the source and platform rather than retaining -c:v copy simply because it appears in an example.
The same caution applies to source types other than a conventional MP4. A generated still-image stream, a playlist, a capture device or a feed with changing inputs may need different video and input options. The audio settings in this guide do not decide how those video sources must be encoded. If your immediate task is looping a file, the article on setting up FFmpeg to loop videos on YouTube Live discusses that separate part of the command.
Likewise, do not confuse stream copy with an audio bitrate change. If audio is copied without re-encoding, FFmpeg cannot apply a new AAC bitrate to that copied audio. The example explicitly selects -c:a aac, so audio is encoded to AAC at the specified bitrate and sample rate, while video copying remains conditional. This distinction is useful when a source already contains audio encoded in a format that differs from the desired live output.
Replace placeholders and protect the stream key
The destination shown in the command is deliberately fictional. Open YouTube Live Control Room for the channel and copy the current ingest details it provides. Replace YOUR_YOUTUBE_INGEST_ADDRESS with the actual server or ingest address and YOUR_STREAM_KEY with the key for the broadcast. Do not publish the finished command in a forum, paste it into a public support ticket, or include it in a screenshot that others can see.
Treat the stream key as a credential. Anyone who obtains it may be able to send a broadcast to the channel’s live ingest, so keep it out of public scripts, shared documents and shell history that other users can read. If you suspect it has been exposed, use YouTube’s current controls to reset or replace it, then update the authorised encoder with the new value. Avoid putting a real key in this article’s command or in examples you send for help.
If several people operate the channel, decide who can access the key and where the production command is stored. Use a private location with access limited to those who need it; do not send the key alongside a public video file or playlist. When asking for technical help, redact the destination so the structure can be discussed without revealing the credential.
The ingest URL may vary with the channel’s current configuration. Do not assume a URL found in an old command, a tutorial or another operator’s setup is still the correct one. Verify both address and key from the channel’s current Live Control Room immediately before a planned change, particularly when moving a long-running stream from one encoder or host to another.
Test the audio and watch stream health
A bitrate value is not a listening test. Before relying on a command for a 24/7 devotional channel, run a representative test with the actual programme material. Listen for missing channels, silence, clipping, abrupt changes in loudness and audio that drifts out of sync with the picture. Test a transition between items as well as a single song or recording, because playlists and source changes can expose routing problems that are not obvious in one file.
Watch Live Control Room’s stream health while the test is active. Confirm that YouTube receives audio and video, and check for warnings or interruptions rather than assuming that a successful FFmpeg start means the audience hears the intended programme. YouTube’s streaming tips advise leaving bandwidth headroom for the total stream bitrate and monitoring quality. The audio figure is only one part of that total; video, protocol overhead and changes in network conditions also matter.
For an always-on channel, test under the conditions you expect to operate in, including the actual source and network path. A command that works for a short preview may still encounter a source file ending, a network interruption or an input change later. A bitrate setting cannot prevent those events. Decide separately how the process will be observed and restarted, and what the channel should show or play if its normal source becomes unavailable.
If the stream disconnects when a connection changes, investigate the network and encoder behaviour rather than raising the audio bitrate. The guide to handling an OBS stream disconnect during a network switch concerns a different encoder, but the operational point carries over: a stable audio setting cannot make an unstable connection continuous. Keep notes on the source, command and observed Live Control Room status so a later fault can be narrowed down.
For operators who do not want a computer at home to be the point of failure for a file-based loop, StreamNeo removes the need to keep that computer running by taking an uploaded video and carrying it as a YouTube live stream. It does not change the need to choose the right source audio or check the channel’s current ingest settings.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
What audio bitrate should I use for a stereo 24/7 YouTube livestream?
For a normal stereo live stream, YouTube’s stated recommendation is AAC at 128 kbps and 44.1 kHz. The 24/7 duration does not, on its own, call for a different audio bitrate. Check the current live settings guidance and test your own programme mix.
How do I set -b:a in FFmpeg?
Use -b:a 128k with -c:a aac to request 128 kbps from FFmpeg’s native AAC encoder. Add -ar 44100 for a 44.1 kHz output sample rate. If you use a different AAC encoder, check its documentation because encoder options can behave differently.
Can I use -c:v copy for every input?
No. Video stream copy is conditional on the source codec and the path to the output being compatible. Check the actual input and choose suitable video encoding options if they are not.
Does this bitrate setting make a 24/7 stream reliable?
No. It configures audio encoding, not source continuity, network stability or recovery from interruptions. Test the complete setup, monitor Live Control Room stream health and plan separately for faults that could stop the broadcast.