<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> </head> <body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "> <div style="color: rgb(0, 0, 0); "> <div> <div><font class="Apple-style-span" face="Times New Roman"><span class="Apple-style-span" style="font-size: 16px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px;"><br> </span></font></div> </div> </div> <span id="OLK_SRC_BODY_SECTION" style="color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "> <blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;"> <div xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"> <meta name="Generator" content="Microsoft Word 11 (filtered medium)"> <style>  </style> <div lang="EN-US" link="blue" vlink="purple"> <div class="Section1"> <p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial">Hi,<o:p></o:p></span></font></p> <p><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">  </span></font>We need to simultaneously capture/preview video on a TI DM365 while asynchronously taking JPEG stills from the same video stream.  Playing around with gst-launch, it only seems to work correctly when v4l2src num-buffers=1. Sample working pipeline:<o:p></o:p></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">gst-launch -v v4l2src  num-buffers=1 always-copy=FALSE  input-src=composite \<br> ! TIVidResize contiguousInputFrame=TRUE \<br> ! 'video/x-raw-yuv,width=(int)736,height=(int)480' \<br> ! queue \<br> ! TIImgenc1  iColorSpace=UYVY oColorSpace=YUV420P qValue=75 engineName=codecServer \<br> ! queue \<br> ! filesink location=output.jpg<o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font></p> </div> </div> </div> </blockquote> </span> <div style="color: rgb(0, 0, 0); "><br> </div> <div><span class="Apple-style-span" style="font-size: 18px; "><font class="Apple-style-span" color="#3300fb">Have you considered multifilesink?  Makes a single output file for each frame that arrives in the sink. The downside of this is, of course, it makes a file for EVERY frame.  Also, because you are not keeping the entire stream you may loose (some?) timestamps and tags.  I don't know for sure.  If that information is really important to you, consider turning your stream in mjpeg and saving it into a container, Matroska is a good choice.  You will still have your individual frames that you can later extract and only one frame.</font></span></div> <div><span class="Apple-style-span" style="font-size: 18px; "><font class="Apple-style-span" color="#3300fb"><br> </font></span></div> <div><span class="Apple-style-span" style="font-size: 18px; "><font class="Apple-style-span" color="#3300fb">Wes</font></span></div> <div style="color: rgb(0, 0, 0); "><br> </div> <div style="color: rgb(0, 0, 0); "><br> </div> <span id="OLK_SRC_BODY_SECTION" style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px; "> <blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;"> <div xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"> <div lang="EN-US" link="blue" vlink="purple"> <div class="Section1"> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">If I modify the above to remove num-buffers=1, or even just set num-buffers=2, it hangs and never produces a valid JPEG. I would have expected it to just overwrite output.jpg<o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> <o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">If, I change this to something that is, for instance, previewing the video at thesame time, things break as well. Sample Pipeline:<o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">gst-launch -v v4l2src always-copy=FALSE  input-src=composite \<br> ! queue \<br> ! tee name= t \<br> ! 'video/x-raw-yuv,width=(int)736,height=(int)480' \<br> ! tidisplaysink2 video-standard=vga display-output=lcd mmap-buffer=FALSE dma-copy=TRUE \<br> t. \<br> ! queue \<br> ! 'video/x-raw-yuv,width=(int)736,height=(int)480' \<br> ! videorate \<br> ! TIImgenc1  iColorSpace=UYVY oColorSpace=YUV420P qValue=75 engineName=codecServer \<br> ! filesink location=output.jpg<o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><o:p> </o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Is it possible to create a gstreamer pipeline using “standard” parts to accomplish what I need, or will I need to modify my JPEG encoder element tomake this work? <o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><o:p> </o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Thanks!<o:p></o:p></span></font></p> <p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Paul<o:p></o:p></span></font></p> <p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt; font-family:Arial"><o:p> </o:p></span></font></p> </div> </div> </div> </blockquote> </span><br> <hr> <font face="Arial" color="Gray" size="1">CONFIDENTIALITY NOTE:<br> <br> This e-mail and any attachments are confidential. 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