To encode a 24-hour YouTube video with FFmpeg using two-pass bitrate control, run FFmpeg once to analyze the video and write pass statistics, then run it again to create the output using those statistics. This is useful when you want to target a bitrate and estimate file size; it is not required for uploading to YouTube. First assemble the playlist into one video file: encoding a file does not create a YouTube playlist or schedule a live stream.
Before you encode: assemble and inspect the source
The commands below assume your playlist items have already been assembled into a single input file, such as input.mp4, with the intended resolution, frame rate, audio, and color characteristics. Creating that file—including joining clips with matching stream properties—is a separate task. Check your account’s current upload and duration limits as well; the cited encoding guidance does not establish what a particular account can upload.
Inspect the assembled file before committing to a 24-hour encode:
ffprobe -hide_banner -i input.mp4Confirm the duration, video and audio streams, frame rate, dimensions, audio layout, and whether the video is interlaced. Also note whether the source is SDR or HDR and its color characteristics. These details determine which YouTube reference bitrate applies and whether you need deliberate scaling, frame-rate conversion, deinterlacing, or color handling.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Keep enough working storage for the source, final output, pass logs, and any assembly intermediates. At 8 Mbps for video, a 24-hour video payload is approximately 86.4 decimal GB, calculated as 8 megabits per second × 86,400 seconds ÷ 8 bits per byte. Audio and container overhead add to that; this is an estimate, not a guaranteed final file size. Leave additional free space for temporary and working files.
Choose a bitrate that matches your upload
YouTube’s official upload recommendations are reference values, not mandatory limits. The appropriate target depends on resolution, frame-rate class, and whether the material is SDR or HDR. YouTube also recommends encoding and uploading at the recorded frame rate. For SDR it recommends BT.709; preserve or correctly signal the source’s color characteristics rather than adding color tags blindly.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
| Resolution | SDR standard frame rate | SDR high frame rate | HDR standard frame rate | HDR high frame rate |
|---|---|---|---|---|
| 360p | 1 Mbps | 1.5 Mbps | Not listed in the cited guidance | Not listed in the cited guidance |
| 480p | 2.5 Mbps | 4 Mbps | Not listed in the cited guidance | Not listed in the cited guidance |
| 720p | 5 Mbps | 7.5 Mbps | Not listed in the cited guidance | Not listed in the cited guidance |
| 1080p | 8 Mbps | 12 Mbps | 10 Mbps | 15 Mbps |
| 1440p | 16 Mbps | 24 Mbps | 20 Mbps | 30 Mbps |
| 2160p | 35–45 Mbps | 53–68 Mbps | 44–56 Mbps | 66–85 Mbps |
These are YouTube’s recommendations for the respective resolution and frame-rate groups, not measurements of the quality you will get from a particular source. For stereo audio, the same YouTube page gives 384 kbps as a reference. The page recommends MP4, H.264 video, progressive scan, High Profile, two consecutive B frames, closed GOP with a GOP duration of half the frame rate, CABAC, variable bitrate, and 4:2:0 chroma. Its audio recommendations include AAC-LC, Opus, or Eclipsa Audio at 48 kHz. See YouTube’s recommended upload encoding settings for the full guidance and supported audio channel combinations.
The example below uses 8 Mbps for the video, matching YouTube’s SDR reference for 1080p at the standard frame-rate group. If your source is HDR, a different resolution, or in YouTube’s high-frame-rate group, select the applicable reference instead. Do not change frame rate merely to fit a bitrate category.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Run FFmpeg’s two-pass encode
This Linux/macOS template uses FFmpeg’s libx264 encoder to produce an H.264 MP4. Replace the input, output, and bitrate as needed. It is an illustrative template, not a command tested against your specific input or FFmpeg build.
Pass 1: analyze the video
ffmpeg -i input.mp4
-map 0:v:0 -c:v libx264 -preset medium -b:v 8M
-pass 1 -passlogfile encode_stats -an -f null /dev/nullThis pass reads the selected first video stream, analyzes it, and writes statistics using the encode_stats prefix. It does not create the final video file. On Windows, use NUL rather than /dev/null for the null device; output muxer handling can differ, so check your installed FFmpeg version.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Pass 2: create the output
ffmpeg -i input.mp4
-map 0:v:0 -c:v libx264 -preset medium -b:v 8M
-pass 2 -passlogfile encode_stats
-map 0:a? -c:a aac -b:a 384k -ar 48000
-pix_fmt yuv420p -movflags +faststart output.mp4The second command encodes the video using the analysis statistics and adds audio if an audio stream is present. In this example, audio is re-encoded to AAC at 384 kbps and 48 kHz. If the source audio already has the format you want, copying it or choosing different audio settings may be more appropriate. Check the resulting file’s streams and playback before uploading.
The commands rely on libx264 being available in your FFmpeg build. FFmpeg’s general bitrate options are in bits per second, so 8M means 8 megabits per second. For two-pass encoding, keep the input, selected video stream, encoder, target bitrate, and material video filters or options aligned across both passes. If you add scaling, deinterlacing, frame-rate conversion, or other video filters, apply the same intended processing in both passes. Use a unique pass-log prefix for each input or simultaneous job so they do not overwrite one another. FFmpeg documents these options in its full documentation and codec documentation.
Recommended Free Tools
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Understand the trade-offs and verify the result
Two-pass bitrate encoding spends a complete first pass analyzing the video so the second pass can allocate bits toward the target average bitrate. The trade-off is the extra analysis pass and its processing time. How long either pass takes depends on the computer, FFmpeg build, source, filters, and encoder settings; there is no reliable universal completion-time estimate.
Use bitrate-based two-pass encoding when a deliberate average bitrate or approximate output size matters. Do not casually combine this example with -crf: CRF is a quality-oriented rate-control mode, while this template targets bitrate. A quality-based encode may produce a less predictable size, whereas a target bitrate gives you a more useful size estimate but does not guarantee a particular visual quality for every source.
- After encoding, use
ffprobeto check the output duration, video and audio streams, dimensions, frame rate, and codecs. - Play the beginning, a few points through the file, and the end to catch missing audio, broken joins, or unexpected visual changes.
- Compare the output’s color and appearance with the source. YouTube explains how unspecified or unsupported color metadata can affect its interpretation, so do not apply generic color tags without knowing the source.
- Review your rights to every source item and YouTube’s current rules before publishing. Encoding settings do not establish permission to use material or guarantee that a video will be eligible for monetization.
Troubleshoot common failures
- FFmpeg reports that
libx264is unavailable: your installed build may not include that encoder. Check the build’s available encoders and use a build or encoder that supports your intended workflow; hardware encoders have different options and behavior. - The second pass cannot find statistics: confirm that pass one completed, both commands use the same
-passlogfileprefix and working directory, and the log files remain available. - The output is much larger or smaller than expected: bitrate estimates describe the video payload, not the exact MP4 size. Check the selected bitrate, duration, audio settings, and output streams; allow for audio and container overhead.
- Video or audio is missing: inspect the input stream list, confirm the intended stream mapping, and check that the output contains the expected streams. The example selects the first video stream and optionally maps audio streams.
- The output looks stretched, stutters, or has odd color: verify the source dimensions, frame rate, interlacing, and color metadata. Apply only the scaling, deinterlacing, frame-rate, or color processing that the source requires, consistently in both passes.
- The encode stops because storage fills: check free space before starting and include room for the assembled source, output, logs, and intermediates. A long video can require substantial working capacity.
Or let it run in the cloud
If your goal is to keep a YouTube channel live with uploaded videos rather than make one long video for upload, StreamNeo is a different workflow: upload a recording or build a playlist, add your YouTube stream key once, and go live. It loops the video from the cloud, so your computer and home connection do not have to stay on. It streams to YouTube only.
- Nothing has to stay on at home; the stream runs from the cloud.
- Each slot is one flat price for any uploaded quality up to 4K 60fps, with no re-encode or quality tiers.
- It automatically recovers if YouTube drops the stream.
- The first day is free with no card, once per account.
- Monthly: $9.99 per month.
See StreamNeo for details, or start the free first day.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
