need help to understand the pipeline

[i.nixman at autistici.org]

hello!


> Assuming your pipeline actually runs, I can assure you that your
> videoconvert does not take jpeg as input and you have specified 
> video/x-raw
> as format (a family of raw formats). So v4l2src does output raw video 
> and
> not JPEG.

if this is the case, should I receive frames of size W * H * 
BITS_FOR_PIXEL bytes?

> Now I don't know your platform and maybe your v4l2src
> implementation has the ability to read JPEG/MJPEG from the camera and
> convert it to raw video on your specific hardware platform, but as 
> such,
> you have no JPEG in your pipeline. And I am assuming your pipeline is
> running. Is it?

link for the cam: 
https://eu.mouser.com/ProductDetail/SMART-Wireless-Computing/ACC-1H10-00-P3?qs=%2Fha2pyFaduhBYc1JrwWqtHuacCzXw%2FJje6%2FvUrFj3%252BPWtt5afRW%2Fbw%3D%3D

and link for the chip it uses (page 80): 
https://cdn.sparkfun.com/datasheets/Sensors/LightImaging/OV5640_datasheet.pdf

I don’t understand who to believe?
and how to understand what exactly the camera gives?

if the camera actually sends uncompressed YUV, then each frame must be 
5MP * 12 = 60Mbit per frame? really?


> Now run your pipeline again with the '-v' flag set for gst-launch-1.0
> pipeline and post ALL the output here. We can then identify what each
> module take as input and what they output.

sure:

/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = 
video/x-raw, width=(int)1280, height=(int)800, framerate=(fraction)10/1, 
interlace-mode=(string)progressive, format=(string)YUY2, 
pixel-aspect-ratio=(fraction)1/1, colorimetry=(string)bt709

/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = 
video/x-raw, width=(int)1280, height=(int)800, framerate=(fraction)10/1, 
interlace-mode=(string)progressive, format=(string)YUY2, 
pixel-aspect-ratio=(fraction)1/1, colorimetry=(string)bt709

/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = 
video/x-raw, width=(int)1280, height=(int)800, framerate=(fraction)10/1, 
interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, 
format=(string)NV12, colorimetry=(string)bt601

/GstPipeline:pipeline0/v4l2h264enc:v4l2h264enc0.GstPad:src: caps = 
video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, 
profile=(string)high, level=(string)1, width=(int)1280, height=(int)800, 
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)10/1, 
interlace-mode=(string)progressive, colorimetry=(string)bt601

/GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps = 
video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, 
profile=(string)high, level=(string)1, width=(int)1280, height=(int)800, 
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)10/1, 
interlace-mode=(string)progressive, colorimetry=(string)bt601


thanks!

best!