Recording video with the Logitech C910 on Ubuntu 11.04 with GUVCViewer 1.4.1

Short : IT WORKS !

Long :
Video recorded with the Logitech C910 on Ubuntu 11.04 64bits (kernel 2.6.38-9) with GUVCViewer/guvcview 1.4.1

4 new camera outputs modes have been added : RGB3, BGR3, YV12 and YU12 in addition to the already available MJPG YUYV

Video recording wasn't possible for me with MJPG or YUYV (MJPG was making broken videos and YUYV was giving very low framerate too easily), but now everything seems to work fine by using one of the four modes (I'm using RGB3 for this exemple recording).

The resolution of the video is 864x480.
However the video playback (and therefore recording) now freeze when trying to use resolutions with height higher than 600 pixels. Hope this will be fixed soon.

Category:

Science & Technology

Tags:

• Logitech
• C910
• Test
• GUVCVideo
• GUVCViewer
• UVC
• guvcview
• Linux
• Ubuntu

[hellmind]

Awful, :(

I got 5 c910 and yet, there are no way to make it work in linux at full speed like in windows :(

MJPG mode is bugged , logitech says its ffmpeg fault's, and ffmpeg don't want to fix because it is for a single product (c910) patch.

Is there any camera like this but working at least 720p@30 on linux?

the best I did with my c910 is 720p@15

[LunaVorax]

@hellmind With all the respect I owe to ffmpeg, I agree that their decision not to fix this C910 specific bug is retarded.

I'm very sorry, but I don't own any other 720p-capable webcam than the C910.

You should ask on the Ubuntu, Arch Linux and other forums. I'm pretty sure you'll get a satisfying answer.

[analfabetovirtual]

no 1080p?

[LunaVorax]

@analfabetovirtual Not for no, I'll try again soon if you want.

Still, USB 2.0 is not speedy enough to allow 1080p at more than 7~14fps (iirc).

[CassidyJamesBlaede]

I just got the same camera. Was there any special driver installation you had to do?

[LunaVorax]

@CassidyJamesBlaede No!

It's an UVC camera, so the Linux kernel is supposed to handle this automatically.

[ThalamusMinimus]

@LunaVorax

Depends on the compression & color-depth used: e.g. raw (uncompressed) 1080p in 42-bit color obviously would stutter thru a USB2.0 socket... but Blu-Ray quality 1080p @ 30fps needs only 4.5 MB/s (see: wikipedia /wiki/List_of_device_bit_rates­#Storage Blu-Ray and HD-DVD).

USB2.0 is typically good for 20 MB/s at the least, so you can get quality thru a USB2.0 that at least pro film critics rave about...or actually more than 4x that quality [4.4 = 20MB/s divided by 4.5MB/s].)

[figadorable]

@LunaVorax this is wrong, see my post below

[figadorable]

@analfabetovirtual yes, see my post below

[figadorable]

@hellmind I record 1080p @ 24-30fps (becomes lower when it is dark) on my super-powerful eee-901HA.

At 1600x896 the video flux is 3.4 megabytes per second and

at 1920x1080 it is 8 megabytes per second. In both cases the CPU (intel Atom N270) is loaded by 12%. The command line is

ffmpeg -s 1920x1080 -f video4linux2 -vcodec mjpeg -i /dev/video0 -vcodec copy video.avi

Note that a)you have to compile ffmpeg manually b) stupid youtube does not understand it c) you reencode it with mencoder

[CassidyJamesBlaede]

@LunaVorax yeah, awesome! I've played around with it a bit and *wow,* it looks nice. I love that you get full control of all the settings and everything. I'm looking at getting a nice studio backdrop and lighting, and that'll come in handy.