Comment by adrian_b
6 hours ago
A Logitech FullHD camera on USB, but I doubt that the problem was camera-specific. I believe that I would have seen the same behavior on any high-resolution USB camera.
In FreeBSD, the command required for recording was very simple and it worked flawlessly. In Linux, it was more complex and there were various stuttering problems at maximum resolution. I am still using those cameras, but I have not tried them again in Linux. In Linux they worked worse than in FreeBSD around 5 years ago, perhaps nowadays there is no longer any problem in Linux.
This was intended to be an example that you cannot know a priori whether a given device will work better on FreeBSD or on Linux. In general, there is a greater probability for Linux to have good support than for FreeBSD, but there are also counterexamples, so you cannot be certain which is better until you try both.
I am sorry, I have a hard time accepting this level of detail, acknowledging it was half a decade ago.
In a nutshell, you content that FreeBSD running on the same hardware as "a linux" performed better with camera operations. However, you did not specify even a specific camera model, or the interface(s) used to interact with the camera.
I have zero issue accepting that a BSD is better than a linux at things, pretending otherwise is foolish. However, this specific example isn't tracking.
I have already said that it was an USB camera, using the UVC protocol, and that it had FullHD resolution. Nothing else really matters about the interface.
FreeBSD has a dedicated service for USB cameras, webcamd, and it worked very well for capturing video and audio at maximum resolution, and without interference from any other programs that were running concurrently on the server. As I have said, in Linux not only the required configuration was more complex, but I tried several programs and all had stutter problems at FullHD resolution (while other programs were also running on the computer). That was the status at that time. Now, many kernel versions later, I assume that such problems no longer exist, at least not with old cameras.
I do not see what is not tracking for you in this example. It is not an isolated example, for many years FreeBSD was known to have less problems than Linux in handling video streams and audio streams with low latency and constant throughput. More recently, Linux has also improved, but in the past unreliable performance with certain video/audio devices was not unusual (i.e. where other programs running concurrently caused video/audio drops or delays).
That’s fair. I’m struggling to understand how Linux had a harder time interfacing with a USB byte stream than a bsd would. A model for the camera would be great!
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