<div dir="ltr"><div><div><div><div><div><div><div><div><div>Hi All,<br><br></div>Wonder has anyone any suggestions.<br></div>I am capturing screenshots from an easy-cap usb device connected to a PAL tv box.<br></div>Some of the captured images are perfect but frequently they are poor quality.<br>
<br></div>I am seeing this even if the actual video content is static (for example when in TV menu system where there is no movement).<br>When i say poor quality i mean i occasionally get what looks to be skewed images or images that appear to be the same frame overlaid on top of itself but off centre etc.<br>
</div>Sometimes I'll get a block of green over part of the image.<br><br></div>I'd say about 70% of the images are perfect but around 30% exhibit the strange artifacts.<br><br></div>Can anyone suggest anything that this might be and/or any possible ways of improving things?<br>
</div><div>Here are the pipelines i have been using:<br><br>gst-launch v4l2src device=/dev/video1 norm=PAL ! ffmpegcolorspace ! pngenc snapshot=true ! filesink location=screenshot.png; shotwell screenshot.png<br><br></div>
<div>I've also tried:<br><br>gst-launch v4l2src device=/dev/video1 norm=PAL num-buffers=1 ! ffmpegcolorspace ! jpegenc ! filesink location=screenshot.jpeg<br></div><div><br></div>Thanks!<br><br></div></div>