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For an FFmpeg setup that encodes H.264 on the board, the Raspberry Pi 4 Model B is the better-supported choice. Raspberry Pi documents a hardware H.264 encoder path for Pi 4, while Pi 5 has no hardware video encoder and must use software encoding for H.264. Pi 5 is the newer, faster general-purpose computer, but its CPU and 4K HEVC decoder do not make it the better fit for this specific encoding requirement.
That is an architecture-based recommendation, not a promise that either board will stay live without interruption for 24/7. Validate the complete setup—including input, FFmpeg build, resolution, frame rate, cooling, power, network and restart recovery—under sustained load before relying on it.
Why Pi 4 is the better fit for H.264 encoding
The decisive difference is the encoder path. Raspberry Pi’s comparison identifies Pi 4’s hardware H.264 encoder as h264_v4l2m2m. Pi 5 has no hardware video encoder; H.264 encoding therefore uses the CPU, for example through libx264. See Raspberry Pi’s H.264 encoding performance configurations and its explanation of Pi 5’s software environment.
For a YouTube stream that must be encoded on the Pi, hardware encoding can reduce reliance on CPU-based video encoding. It does not mean every input, filter, audio setup or output mode will work automatically: the installed FFmpeg build, kernel and driver support must expose the intended encoder. Confirm that path on the actual system before building around it.
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Pi 4 vs. Pi 5 for this streaming job
| Factor | Raspberry Pi 4 Model B | Raspberry Pi 5 |
|---|---|---|
| H.264 encoder path | Raspberry Pi identifies the hardware encoder as h264_v4l2m2m. |
No hardware video encoder; H.264 uses software encoding such as libx264. |
| General-purpose processing | Not stated in the cited comparison. | Quad-core 2.4 GHz Cortex-A76 CPU; this general-purpose CPU specification does not establish streaming performance. |
| Video decoder | Not stated in the cited comparison. | 4Kp60 HEVC decoder; decoding capability is not H.264 encoding capability. |
| 24/7 YouTube endurance result | No directly comparable endurance test established. | No directly comparable endurance test established. |
The Pi 5 can still be a viable option if software encoding meets the needs of the chosen resolution, frame rate, filters and audio chain. Its specifications alone do not settle that question; test the actual stream rather than inferring an encoder frame-rate ceiling or reliability result from the CPU model. Raspberry Pi’s Pi 5 specifications list the CPU and decoder details.
Set YouTube’s ingest settings before tuning FFmpeg
YouTube’s live encoder guidance supports H.264 over RTMP or RTMPS, recommends constant bitrate (CBR), and recommends a two-second keyframe interval, with four seconds as the maximum. It recommends RTMPS for encrypted delivery. For H.264 at 1080p30, YouTube’s published recommended bitrate range is 5–14 Mbps. These are YouTube’s published ingest recommendations, not a guarantee of what a particular Pi can encode reliably. Check the current YouTube live encoder settings and bitrate table for your chosen resolution and frame rate; the values vary by mode.
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- Codec: H.264 for an H.264 workflow.
- Rate control: CBR, as recommended by YouTube.
- Keyframes: every two seconds where possible; do not exceed four seconds.
- Bitrate: select the recommendation for the exact output resolution and frame rate. At 1080p30, YouTube lists 5–14 Mbps.
- Transport: use RTMPS when configuring encrypted delivery to YouTube.
Do not lift the 1080p30 bitrate range for a different mode. A higher resolution or frame rate changes the ingest target and can make a marginal encoder or network connection less suitable.
Build and validate the complete Pi rig
Check the actual FFmpeg encoder
Before choosing a command, verify that the FFmpeg installation on the Pi exposes the encoder you intend to use and that the kernel/driver stack supports it. The available path can depend on the software build and platform configuration. The cited evidence does not establish one universal command: camera or file input, audio, pixel format, filters, bitrate and FFmpeg build all affect the correct invocation.
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Avoid unnecessary re-encoding
If the source is already encoded in a format and parameters YouTube accepts, passing the compatible stream through rather than decoding and encoding it again may avoid unnecessary work. Whether that is appropriate depends on the source and the required output; do not assume a file, camera feed or audio track can be passed through unchanged without checking compatibility.
Use dependable power and cooling
Raspberry Pi recommends a 3 A USB-C supply for Pi 4. Its documentation warns that an inadequate supply or cable can trigger low-voltage warnings, while low-quality supplies can cause unpredictable behaviour or storage corruption. A suitable power supply and cable reduce avoidable power risks but do not guarantee uninterrupted service. Consult Raspberry Pi’s computer hardware documentation for power guidance. Pi 5 cooling guidance is available on its product page; assess cooling under your real sustained workload.
Rank #4
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Test for the job you will actually run
Run the intended input, FFmpeg build, output mode, audio and filters for a sustained period, while monitoring for dropped frames, encoder errors, thermal issues, power warnings and network interruptions. Test how the process and stream recover after a restart or connection loss. There is no universal RAM minimum established for this workload: memory needs depend on the input, filters, audio, operating system and other services.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common problems and practical fixes
| Symptom | What to check | Practical response |
|---|---|---|
| The expected hardware encoder is unavailable. | Confirm the FFmpeg build, kernel and driver support for the Pi 4 encoder path. | Use a supported software stack or choose an encoding path demonstrated by the installed build; do not assume the encoder name works on every installation. |
| The stream drops frames or encoding cannot keep up. | Check whether encoding is software-based, whether filters add work, and whether the selected resolution and frame rate match YouTube’s ingest requirements. | Verify the intended encoder, simplify processing where possible, and test a lower output mode if needed. Do not infer sustained capacity from board specifications alone. |
| YouTube rejects or struggles with the incoming stream. | Check H.264, CBR, the bitrate for the exact mode, keyframe interval and RTMP/RTMPS configuration. | Align the output with YouTube’s current settings and confirm the stream key and ingest configuration in YouTube Studio. |
| Low-voltage warnings, instability or storage errors appear. | Inspect the supply and USB-C cable; Raspberry Pi notes that poor power can cause these problems. | Use the recommended Pi 4 3 A USB-C supply class and a suitable cable, then retest. This addresses a power risk, not every possible outage. |
| A long-running stream does not resume after interruption. | Check process supervision, network recovery and the restart behaviour of the streaming setup. | Test recovery deliberately before deployment. Neither board specification establishes automatic recovery or an uptime guarantee. |
Or let it run in the cloud
If the goal is a continuous YouTube channel built from uploaded recordings or a playlist, StreamNeo avoids leaving a Pi, computer or home connection running. Upload your video, add your YouTube stream key once, and go live; the cloud service loops the uploaded material and can automatically recover if YouTube drops the stream. It supports the uploaded quality up to 4K 60fps at one flat price per slot, without re-encoding or quality tiers. The first day is free with no card. Monthly billing is $9.99 per month.
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