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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →For a 4K 60fps YouTube Live stream from Linux, a practical SDR starting point is FFmpeg with h264_nvenc, CBR at 50 Mbps, a 2-second keyframe interval, and RTMPS. YouTube’s current recommendation for 2160p60 is 50 Mbps for H.264 or 35 Mbps for HEVC/AV1; the right command still depends on your GPU, driver, FFmpeg build, source and network.
Start with the right codec and bitrate
YouTube’s live encoder settings page lists these 2160p60 targets:
| Codec and range | Minimum bitrate | Recommended bitrate |
|---|---|---|
| H.264 SDR | 14 Mbps | 50 Mbps |
| HEVC or AV1 SDR | 10 Mbps | 35 Mbps |
| HDR | Use HEVC and 10-bit encoding | Follow the applicable YouTube HDR settings |
These are YouTube’s published ingest recommendations, not a guarantee of image quality or proof that a particular GPU can encode 4K60 in real time. H.264 is the compatibility-first choice in the template below. HEVC can be appropriate when the GPU, FFmpeg build and YouTube ingest workflow support it. YouTube’s listed HDR path is HEVC; its cited settings page does not support AV1 for HDR. YouTube’s live encoder settings also recommend CBR, progressive video, up to 60 fps, two B-frames and one reference frame, with a keyframe interval of two seconds and no more than four seconds. YouTube recommends RTMPS.
Check Linux, FFmpeg and the input first
- Run
ffmpeg -encodersand confirm thath264_nvencappears; for HEVC, look forhevc_nvenc. Check available options withffmpeg -h encoder=h264_nvencorffmpeg -h encoder=hevc_nvenc. An FFmpeg binary must be built with NVIDIA hardware-encoding support. - Run
nvidia-smito check that the GPU and driver are visible. Confirm that the specific GPU supports the codec, profile, bit depth and resolution you plan to use. GPU branding alone does not establish those capabilities. - Inspect the input for its resolution, frame rate, video and audio streams, and color range. Confirm that you can map the intended streams and produce 3840×2160 progressive video at 60 fps.
- Check upload capacity and stability for the selected bitrate, with headroom beyond the video target for audio and network variation. A bitrate recommendation does not establish that your connection can sustain it.
- In YouTube Live Control Room, obtain the stream’s primary RTMPS ingest address and the associated stream key. These values are private; do not publish or share the key.
YouTube’s API describes the primary RTMPS ingestion endpoint and stream name in its liveStreams documentation. Use the values supplied for your own stream.
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Use this SDR H.264 command as a starting point
Replace INPUT with the input filename and RTMPS_INGEST_URL/STREAM_KEY with the private RTMPS address and key YouTube supplies. Keep credentials out of shell history and logs where possible; never paste a real key into a public post.
ffmpeg -re -i INPUT
-map 0:v:0 -map 0:a:0?
-c:v h264_nvenc -preset p5 -tune hq
-rc cbr -b:v 50M -maxrate 50M -bufsize 100M
-g 120 -bf 2 -profile:v high
-pix_fmt yuv420p -r 60
-c:a aac -b:a 128k -ar 44100
-f flv "RTMPS_INGEST_URL/STREAM_KEY"What the important flags do
-repaces a file input in real time. Do not assume the same pacing syntax is right for a live capture source.-map 0:v:0 -map 0:a:0?selects the first video stream and the first audio stream if present. The optional audio mapping avoids failure when the input has no audio; remove or change it if you need different streams.-c:v h264_nvencselects NVIDIA’s H.264 encoder.-preset p5 -tune hqis a starting point, not a universal best setting. Use a slower or higher-quality preset only if your specific setup sustains real-time encoding.-rc cbr -b:v 50M -maxrate 50Msets constant bitrate at YouTube’s recommended 2160p60 H.264 target. The-bufsize 100Mvalue is an illustrative live VBV buffer choice; YouTube does not mandate that buffer size.-g 120requests a 120-frame GOP, or two seconds at 60 fps.-bf 2sets two B-frames, in line with YouTube’s recommendation.-pix_fmt yuv420pand-profile:v highare for this SDR H.264 template. Check that your input and build support the chosen format and profile.-r 60requests a 60 fps output. It does not make a lower-frame-rate source contain real 60 fps motion.-c:a aac -b:a 128k -ar 44100encodes audio as AAC at 128 kbps and 44.1 kHz. Adjust stream mapping and audio settings to suit the actual input and YouTube’s requirements.-f flvmuxes the outgoing stream for the RTMP-family ingest connection; the destination in this template is RTMPS.
The command combines YouTube’s destination recommendations with FFmpeg/NVENC options; it is a template, not a tested configuration for every Linux system. Verify the options against your local build, then test with the actual source and a private YouTube stream before relying on it.
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Choose HEVC for SDR only when your setup supports it
For a YouTube-bound 2160p60 SDR stream, YouTube’s recommended HEVC target is 35 Mbps. In the template, substitute -c:v hevc_nvenc for -c:v h264_nvenc, and set -b:v 35M -maxrate 35M. Keep CBR and the two-second GOP. Select an HEVC-compatible profile and pixel format that the GPU and FFmpeg build actually support; the H.264-specific yuv420p and high settings should not be copied blindly.
NVIDIA’s Video Codec SDK 13.1 includes a 4K60 HEVC live example using a 20 Mbps target and 40 Mbps VBV buffer, among other settings. That example is not YouTube’s current recommended 2160p60 HEVC bitrate; use YouTube’s 35 Mbps target for this destination unless you have a deliberate bandwidth constraint. See NVIDIA’s FFmpeg/NVENC documentation.
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For HDR, preserve the source’s color pipeline
Use HEVC Main 10 for YouTube HDR, with a genuine 10-bit HDR source and correct color metadata. NVIDIA’s YouTube HDR guidance says to use Low or Normal latency, not Ultra Low. HDR signaling must match the source’s transfer function and metadata; fixed HDR color flags pasted into an SDR workflow can misrepresent the image. Do not treat HDR as a quality switch or convert an SDR source to HDR by changing encoder flags. Consult YouTube’s live encoder settings and NVIDIA’s Video Codec SDK guidance for the applicable HDR details.
Test a representative stream and troubleshoot by symptom
- Run a private or otherwise controlled test with the real source, intended audio and planned bitrate. Check that YouTube receives 3840×2160 progressive video at the expected frame rate and reports healthy stream status.
- Test representative motion and audio, not just a static frame. Watch for encoder overload, dropped frames, audio gaps and network instability over a sustained interval.
- If the test fails, use the matching symptom below, change one variable at a time, and repeat the test.
| Symptom | Likely cause to check | Practical fix |
|---|---|---|
| “Unknown encoder” or NVENC option errors | FFmpeg lacks the relevant NVENC encoder or does not accept an option. | Check ffmpeg -encoders and the encoder’s local help output. Use an FFmpeg build with NVIDIA hardware encoding support and adjust options to those that build exposes. |
| GPU or driver is not visible | Driver installation, device access or GPU support may be missing. | Check nvidia-smi, then verify that the GPU supports the selected codec, profile, resolution and bit depth. |
| Encoding falls behind or frames are dropped | The selected preset, resolution, frame rate or workload exceeds the system’s sustained real-time capacity. | Try a faster preset or reduce the output workload, then retest. Do not assume a particular GPU will sustain 4K60 based on its name alone. |
| YouTube reports unstable or insufficient stream health | Upload capacity, network variation or an incorrect bitrate may be involved. | Confirm the destination-specific bitrate, check the connection under sustained load, and test with appropriate network headroom. |
| Wrong resolution or frame rate at ingest | The source, filter chain or output settings do not produce 3840×2160 at 60 fps. | Inspect input properties and mapping; verify the outgoing stream in YouTube’s health information. A -r 60 flag alone cannot create source detail or natural motion absent from the input. |
| No audio or wrong audio track | The input lacks audio or the mapping selects a different stream. | Inspect the input’s audio streams and change -map accordingly; the optional map in the template silently permits no audio. |
| Washed-out or incorrectly colored HDR | HDR metadata, transfer function, bit depth or source color pipeline does not match the encoded output. | Verify that the source is actually HDR, use a supported 10-bit HEVC Main 10 path, and preserve source-matched metadata rather than applying generic HDR flags. |
| Stream does not connect | Ingest URL, stream key or protocol may be incorrect. | Copy the primary RTMPS ingest address and key from YouTube Live Control Room and confirm the destination string. Treat the key as a credential. |
Follow YouTube’s content and live-stream rules
Encoding settings do not grant rights to the video, music or other material in a stream. Before broadcasting, confirm that you have permission for all content and check YouTube’s live-stream encoder and content requirements. Reused or repetitive material may raise separate YouTube policy and monetization issues; technical acceptance of a stream is not a copyright clearance or a guarantee of monetization. Review the rules that apply to your channel and content, and do not rebroadcast material without the necessary rights.
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