Yes—OBS can play a local ProRes file and send a 4K60 live stream to YouTube, but the file and the broadcast use different codecs. Add the MOV as an OBS Media Source, set the output to 3840×2160 at 60 fps, and encode the outgoing stream with a YouTube-supported live codec such as H.264, H.265/HEVC or AV1. YouTube’s English settings guide recommends 35 Mbps for AV1 or H.265 at 4K60, or 50 Mbps for H.264. Test the exact file and setup before the event.
What happens to ProRes when OBS streams it?
OBS reads and plays the local ProRes file; it then encodes the live output for YouTube. ProRes is supported as a local media format in OBS, but YouTube’s live ingest codec list includes H.264, H.265/HEVC and AV1—not ProRes. So you generally do not send the ProRes file’s codec directly to YouTube. You send an encoded live stream while OBS plays the source.
OBS’s Media Sources guide documents adding media files to a scene and lists MOV among supported extensions. That does not guarantee every ProRes profile, frame rate or color configuration will play smoothly on every computer. Test the actual file in the intended scene and at the intended output settings.
Prepare the file and YouTube live stream
- Check the source. Confirm the MOV plays correctly, including its audio and color, in a test OBS scene. ProRes files can be demanding to decode; the cited documentation does not establish a universal hardware requirement.
- Create or select the YouTube stream. In YouTube Studio, create or open the live stream and locate its stream URL and stream key. Treat the key like a password: do not publish it or share it with anyone who should not control the broadcast.
- Open OBS and add the source. In the scene you plan to use, select Sources → + → Media Source, give it a name, and choose the local MOV file. OBS documents controls including Loop, Restart playback when source becomes active, hardware decoding when available, and hiding the source when playback ends. Choose looping if the video should repeat; otherwise decide what should appear when it finishes.
- Set the video canvas and output. In Settings → Video, set the base (canvas) resolution and output (scaled) resolution to 3840×2160 for a 4K output, and set the common frame rate to 60 fps. Match the scene framing to the desired presentation; scaling or cropping a source can change how it appears. OBS’s Studio Overview explains the canvas, scaled output and frame-rate settings. Test 60 fps performance on the actual system.
- Connect OBS to YouTube. In Settings → Stream, choose YouTube as the service and enter or select the stream key and server details. YouTube can usually detect resolution and frame rate from the incoming encoder; YouTube also documents custom stream keys for manually selecting them. Keep the key private.
- Choose a live encoder and configure output. In Settings → Output, use an encoder available on your platform that outputs a YouTube-supported codec. For streaming, set rate control to CBR, keyframe interval to 2 seconds, and the bitrate according to the table below. YouTube says not to exceed a 4-second keyframe interval. Configure audio as AAC or MP3 for RTMP/RTMPS, and use RTMPS where supported.
- Run a complete test. Start a private or otherwise appropriate test stream before the real event. Include motion and audio like the planned program, verify the source starts and loops or ends as intended, and check YouTube’s stream health and any warnings. YouTube Help says, “Make sure to test before you start your live stream.”
4K60 codec and bitrate settings
The figures below are from YouTube Help’s English live encoder settings page, accessed 2026-10-03. They are YouTube’s stated minimum and recommended bitrates for the specified resolution, frame rate and codec—not a guarantee that a connection or encoder can sustain them. YouTube recommends an upload speed test; its page does not give one universal headroom multiplier.
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| Live video codec | YouTube minimum at 4K/2160p60 | YouTube recommended at 4K/2160p60 | Practical note |
|---|---|---|---|
| AV1 | 10 Mbps | 35 Mbps | YouTube lists AV1 for live video, but not for HDR in the cited guidance. |
| H.265/HEVC | 10 Mbps | 35 Mbps | YouTube lists HEVC for live video and for HDR. |
| H.264 | 14 Mbps | 50 Mbps | OBS describes H.264 as its default broadly compatible web codec. |
Use a bitrate your encoder and sustained upload can actually maintain. A brief speed-test peak is not proof that the connection can hold the rate throughout a long stream. If the stream health reports insufficient bandwidth or unstable delivery, lower the bitrate or resolve the network issue, then retest.
SDR, HDR and audio considerations
SDR
YouTube’s cited guide recommends Rec. 709 color and 8-bit for SDR. Make sure OBS output color settings and the source presentation are appropriate for SDR; a ProRes file’s label alone does not tell you how it will look after decode and output encoding.
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HDR
For HDR, YouTube’s guide lists H.265/HEVC and 10-bit, and says AV1 is not supported for HDR. HDR behavior depends on the source and the complete OBS encoder and color configuration, so validate the result using the exact file and setup rather than assuming that an HDR ProRes source will remain HDR in the stream.
Audio
Check that the file’s audio is audible and synchronized in the OBS mixer and in the test stream. For RTMP/RTMPS, YouTube’s settings guidance lists AAC or MP3 audio. A video that plays correctly locally can still have a muted, missing or incorrectly routed OBS audio source.
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Latency and stream expectations
YouTube’s cited encoder settings guidance says 4K/2160 streams do not have the low-latency option and use normal latency. If low latency is essential, treat 4K as a constraint to evaluate before scheduling the broadcast rather than assuming the setting can be enabled for this resolution.
Troubleshoot common 4K60 ProRes problems
| Symptom | Likely check | What to do |
|---|---|---|
| The MOV will not open or playback is inconsistent | The actual ProRes profile, file, or frame rate may not work smoothly with the host setup. | Confirm the file path and source selection, test the file in a clean OBS scene, and check playback before connecting to YouTube. The supported MOV extension does not guarantee every file configuration. |
| YouTube does not receive the stream | Stream key, server selection, or connection settings may be wrong. | Recheck the YouTube stream URL and key in OBS. Replace an exposed key in YouTube Studio; never post it publicly. |
| YouTube reports bitrate or stream-health warnings | The encoder may not sustain the configured bitrate, or the upload may be unstable. | Check the sustained upload under realistic conditions, reduce bitrate if necessary, and retest. Confirm CBR and the correct resolution and frame rate. |
| Motion stutters or frames are missed | Playback decoding, 4K60 output encoding, or system performance may be insufficient for the chosen settings. | Test source playback and output separately, monitor OBS performance indicators, and choose an encoder or bitrate the host can sustain. There is no universal hardware model requirement established by the cited guides. |
| The image looks washed out, clipped or incorrectly colored | Source color characteristics and OBS output settings may not match the intended SDR or HDR presentation. | Verify SDR Rec. 709/8-bit or the intended HDR HEVC/10-bit configuration and inspect a test stream on the target playback path. |
| Video plays but sound is absent or out of sync | Audio source routing, mute state, or source timing may be wrong. | Check OBS mixer activity and monitor a complete test stream with the intended AAC or MP3 output. |
| The video ends instead of continuing | The Media Source loop option may be off, or end-of-playback behavior may not match the scene. | Enable looping for repeat playback, or configure the scene behavior deliberately for a one-time file. |
Copyright and YouTube channel rules
Before streaming a ProRes file, make sure you have the rights to every video, music track, image and other element in it. A local file format does not change copyright obligations or YouTube’s policies. Review YouTube’s current rules for the material and channel, and do not assume that permission to download or edit a work includes permission to broadcast it. For a practical preflight, use StreamNeo’s copyright safety checklist.
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