Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesTo join compatible gaming VOD files in a chosen sequence on Ubuntu without re-encoding, put their paths in an FFmpeg concat list in the order you want, then run ffmpeg -f concat -i vod-list.txt -c copy joined.mp4. If the files have different stream characteristics, use the concat filter and re-encode instead; stream copy cannot reconcile those differences.
1. Check that FFmpeg is available
This workflow assumes FFmpeg is installed and available in your Ubuntu shell. Check with:
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ffmpeg -versionIf the shell reports that the command is not found, install FFmpeg using the package source appropriate for your Ubuntu release, then check again. The Ubuntu package version and enabled codecs depend on the release and build; verify them on the machine rather than assuming a particular version.
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2. Put the VODs in the intended order
Create a plain-text file named vod-list.txt in the directory containing the video files. Add one entry per file, in playback order:
#1 Best Overall
- 【1080P 60FPS Video Capture Card】 This HDMI game capture card is based on USB3.0 high speed transmission port, input resolution up to 4K@30HZ, output resolution up to 2K@30Hz or 1920×1080@60Hz. Type c and USB interface can meet most of the devices in daily life. Easily meet the online capture, real-time recording, online meetings, live gaming and other functions, so you have a better visual enjoyment. Note: For capture use only; requires capture software to function and is not intended for direct screen casting to a monitor or TV
- 【Ultra Low Latency Screen Sharing】 HDMI capture card is made of good quality aluminum alloy with strong heat dissipation, allowing you to enjoy ultra low latency while live gaming or video recording or live streaming, avoiding blue screens and lag. This HDMI to USBC capture card supports easy recording of good quality audio or HD video and transferring it to your computer or streaming platform, allowing you to record 60 fps HD video directly on your hard drive and real-time preview
- 【Plug and Play, Easy to Carry】 This HDMI 1080P video capture card does not require any additional drivers or external power supply, just plug and play for fast capture. The capture card is small and lightweight, so you can put it in your bag for emergencies, making it very portable for outdoor live streaming. It's also a great way to share content in game recording, video conference, video recorder and online teaching
- 【Wide Compatibility USB Capture Card】 Easily streams to Facebook, Youtube or Twitch. With the connection, this HDMI to USB C/3.0 video capture devices can be working on several Operating Systems and various software: Windows 7/ 8/ 10, Mac OS or above, Linux, Android, Laptop, Xbox One, PS3/PS4/PS5, Camera, DVDs, Set Top Box, Webcame, DSLR, Switch/Switch 2, TV BOX, HDTV, Potplayer/VLC, ZOOM, OBS Studio etc.
- 【Package Content & Note】 1x HD Audio Capture Card , 1x USB 3.0 to USB C Adapter (A-side 3.0, B-side 2.0), 1x user manual. Please note that you need to restart the OBS Studio software after the audio setup is complete, otherwise it will result in no sound output. When using an adapter, if the device is recognized as USB 2.0, try using the other side with the USB-C port. Simply flip the capture card and reconnect it to be recognized as USB 3.0
file 'gameplay-01.mp4'
file 'gameplay-02.mp4'
file 'gameplay-03.mp4'The order of the file lines is the order FFmpeg uses. An explicit list avoids relying on shell glob sorting, which may not match the intended sequence. If the recordings are in another directory, use their paths in the list.
3. Join compatible files with stream copy
From the directory containing the list, run:
ffmpeg -f concat -i vod-list.txt -c copy joined.mp4The concat demuxer reads the list as one input, and -c copy copies the encoded streams to the output without decoding and re-encoding them. This is fast and does not introduce quality loss from a re-encode, but it works only when the files’ streams are compatible and the output container can represent them. FFmpeg’s documentation says concat-demuxer inputs need the same streams, including codecs and time bases (FFmpeg concat demuxer documentation).
Rank #2
- 【1080P HD High Quality】Capture resolution up to 1080p for video source and it is ideal for all HDMI devices such as PS4, PS3, Xbox One, Xbox 360, Wii U, DVDs, DSLR, Camera, Security Camera and set top box. Note: Video input supports 4K30/60Hz and 1080p120/144Hz. Does not support 4K120Hz/144Hz. Output supports up to 2K30Hz.
- 【Plug and Play】No driver or external power supply required, true PnP. Once plugged in, the device is identified automatically as a webcam. Detect input and adjust output automatically. Won't occupy CPU, optional audio capture. No freeze with correct setting.
- 【Compatible with Multiple Systems】suitable for Windows and Mac OS. High speed USB 3.0 technology and superior low latency technology makes it easier for you to transmit live streaming to Twitch, Youtube, Facebook, Twitter, OBS, Potplayer and VLC.
- 【HDMI LOOP-OUT】Based on the high-speed USB 3.0 technology, it can capture one single channel HD HDMI video signal. There is no delay when you are playing game live.
- 【Support Mic-in for Commentary】Rybozen capture card has microphone input and you can use it to add external commentary when playing a game. Please note: it only accepts 3.5mm TRS standard microphone headset.
FFmpeg options apply to the next input or output, so keep input options before the input they affect and output options after the inputs. The command above places the concat format and list before the output file. See the FFmpeg command-line documentation for option ordering and stream-copy behavior.
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Inspect the inputs first
Gaming captures may differ in codecs, time bases, audio tracks, subtitles, or other stream details when they were recorded with different settings. Inspect each source and compare its streams before choosing a fix. There is no single safe normalization command for every group of VODs: the right output configuration depends on the actual video, audio, subtitle, and container details.
Rank #3
- 【4K HDMI Input, 2K@30Hz Recording】Powered by a true USB 3.0 high-speed interface, the capture card supports up to 4K@30Hz HDMI input and records at 2K@30Hz or 1080P@60Hz. Perfect for gamers, streamers, and professionals who need crisp, smooth video for live streaming, gameplay recording, or online meetings.
- 【Ultra Low Latency Screen Sharing】Built with a premium aluminum alloy shell and advanced chipset for stable heat dissipation, ensuring ultra-low latency transmission. Capture high-quality video and dual-channel audio in real time—no lag, no frame drop—ideal for Twitch, YouTube, or OBS streaming.
- 【Easy Plug and Play, Compact & Portable】No driver or external power required—just plug and play via USB 3.0 or Type-C connection to your Windows or macOS computer. Lightweight and compact design makes it easy to carry for outdoor streaming, live shows, or mobile recording setups.
- 【Wide Compatibility & Multi-Device Support】Compatible with Windows 7 8 10 11, macOS, Linux,Android and supports most popular software such as OBS, Zoom, VLC, Twitch Studio, and more. Works seamlessly with PS4, PS5, Xbox, Switch, DSLR cameras, TV boxes, and other HDMI-output devices for streaming to YouTube, Twitch, etc.
- 【What You Get】Includes: HDMI Capture Card, USB 3.0 to USB-C Adapter, User Manual. Tips: Make sure your tablet’s OTG function is enabled before connecting. Test your HDMI device with a monitor first to confirm video and audio output, then connect to the Video Capture Card for recording.
Use the concat filter when re-encoding is needed
When inputs cannot be joined by stream copy, use FFmpeg’s concat filter to combine decoded streams and encode the result to a consistent target format. Filters operate on decoded media, so this method requires re-encoding and cannot be combined with -c copy. Consult the FFmpeg FAQ on concatenating media files and the FFmpeg documentation to build a command that matches the actual streams. Choose output settings deliberately; converting every input to guessed settings can lose tracks or produce unwanted changes.
Do not substitute the concat protocol for ordinary MP4 or MKV files
The concat protocol joins files at the byte level and is suitable only for formats that support file-level concatenation. FFmpeg identifies MPEG-1, MPEG-2 program stream, and DV as examples; ordinary MP4 or MKV recordings should not be assumed to work this way. For media VODs, use the concat demuxer when streams are compatible, or the concat filter when re-encoding is required (FFmpeg concat protocol documentation; FFmpeg FAQ).
Rank #4
- High-Quality Video Capture, 4K HDMI Capture Card Ready: Capture smooth and vibrant video with this 4K HDMI capture card, engineered for gamers and content creators who demand crisp 1080P 60FPS video quality. Whether you're streaming to Twitch or recording gameplay for YouTube, your footage will look professional and detailed
- Plug-and-Play USB Capture Card, No Drivers Needed: Designed as a USB capture card for streaming, this device works instantly out of the box, just plug into your PC or laptop and start capturing. Fully compatible with popular software like OBS Studio, Streamlabs, and XSplit, making setup quick and stress-free for beginners and pros alike
- Universal Compatibility PS5, Xbox, Switch & More: Stream or record gameplay from virtually any HDMI-enabled device including Nintendo Switch, PS5, Xbox Series X, DSLR cameras, and PCs. The video capture card for gaming supports seamless passthrough so you can play without lag while your audience watches every frame in real time
- Low-Latency Performance for Smooth Streaming: This capture card for streaming minimizes delay between gameplay and broadcast, so you get reliable, low-latency capture that works well for competitive gaming, live broadcasts, and podcast sessions. Suitable for those building their channel with high-quality, engaging content
- Compact & Portable Design for Content Creators: Lightweight and portable, this USB 3.0 capture card works well for creators who travel or switch gaming setups often. Throw it in your bag and stream or record wherever you are, at home, events, LAN parties, streaming or studio sessions
5. Prevent path and timestamp problems
Use safe, explicit paths
For a simple list, keep the files alongside vod-list.txt and use relative filenames such as file 'gameplay-01.mp4'. The concat demuxer’s safe-path rule accepts relative paths whose components use portable characters and do not begin with a period. For trusted local files outside those rules, -safe 0 can disable the check; do not use it with untrusted lists. Ordinary quoting handles many filenames with spaces, but unusual characters require care with concat-list syntax. Verify the exact paths and list formatting before running the command (concat demuxer documentation).
Check durations if later segments start incorrectly
The demuxer positions each file after the preceding file using its duration. If a duration is inaccurate—for example, because it was estimated—or an input is truncated, the resulting timestamps can cause artifacts or misplaced segments. FFmpeg allows a duration directive in the list to override a stored duration; use it only when you know the correct duration for that file (concat demuxer documentation).
6. Troubleshoot common failures
| Symptom | Likely cause | What to check or do |
|---|---|---|
| FFmpeg rejects the list or cannot open an input | A path is wrong, the list is malformed, or the safe-path check rejects a path. | Check the list’s working directory, spelling, quoting, and relative paths. For trusted local files that violate the safe-path rule, consider -safe 0; never disable the check for an untrusted list. |
| Stream copy fails or the output is unusable | The inputs do not have matching stream characteristics, or the target container cannot represent the copied streams. | Inspect the streams and container compatibility. Use a filter-based workflow with a deliberate, consistent output configuration if re-encoding is needed. |
| Segments have timestamp gaps, overlap, or other timing artifacts | A file’s duration metadata is inaccurate, or the file is truncated. | Check the affected input’s duration and integrity. If you know its correct duration, a concat-list duration directive can override the stored duration. |
| Files play in an unexpected sequence | The list lines are not in the desired order, or shell-generated filenames were sorted differently than intended. | Write and review the file lines explicitly; the list order determines the sequence. |
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Quick Recap
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