# Transparent overlays **URL:** \ **Category:** Jetson TX2\ **Tags:** nvbugs, gstreamer\ **Created:** [December 21, 2022, 11:12am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674 "2022-12-21T11:12:33Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [December 21, 2022, 11:12am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/1 "2022-12-21T11:12:33Z")
I have an application where I need to add a transparent overlay to a camera feed and view it on the connected display. I need to make use of hardware accelerated NVIDIA gstreamer plugins because the camera feed is 3840x2160 at 30fps. Ultimately this transparent overlay needs to be a full GUI, but for the sake of simplicity when testing, I’m instead using a static PNG file with transparency information, loaded with multifilesrc. I want this PNG to appear on top of the camera feed, showing only the RGB data, and be able to see the pixel data from the camera feed where there are alpha components in the image. I have tried nvcompositor, however transparency information is not retained. I can only see the PNG with a black background. I’ve made sure that both inputs to the nvcompositor are in RGBA format. This post suggests that nvcompositor doesn’t support alpha [Nvcompositor plugs alpha is not work and alpha plugs no work - #24 by DaneLLL](https://forums.developer.nvidia.com/t/nvcompositor-plugs-alpha-is-not-work-and-alpha-plugs-no-work/230557/24) I can get this to work by avoiding the use of “memory:NVMM”, however performance is then terrible. Similarly, the standard compositor plugin works fine, but again with awful performance. Another approach I have tried is nvoverlaysink, making use of the overlay property. Setting the camera sink to “overlay=1” and the PNG sink to “overlay=2” results in the same behviour as nvcompositor - transparency information is not retained and I can only see the PNG with a black background. Is there any approach that I can use to overlay the transparent image without resorting to software solutions such as “compositor” which don’t provide good enough performance? Thanks in advance. ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [December 26, 2022, 2:25am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/3 "2022-12-26T02:25:42Z")
Hi, The _nvcompositor_ plugin is implemented through NvBuffer APIs and it calls _NvBufferComposite()_. It does not implement applying alpha effect. For this use-case, you can customize _nvcompositor_ to enable alpha effect. For applying alpha effect in calling _NvBufferComposite()_, please refer to discussion in the topic: [The alpha setting in NvBufferComposite is not in effect](https://forums.developer.nvidia.com/t/the-alpha-setting-in-nvbuffercomposite-is-not-in-effect/237560) ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 3, 2023, 2:50pm UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/4 "2023-01-03T14:50:50Z")
Thanks for confirming that nvcompositor doesn’t implement alpha. The linked discussion has a suggestion to “allocate NvBuffer in RGBA and add the flag NVBUFFER\_BLEND”. As far as I can tell, the “do\_nvcomposite” function already does both of these suggestions (found in gstnvcompositor.c) Are you able to be more specific about what needs to change in the nvcompositor source to enable alpha? ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 4, 2023, 2:34am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/5 "2023-01-04T02:34:33Z")
Hi, You mat print out the value and check if it is expected: ```auto nvcomp->comp_params.dst_comp_rect_alpha[i] ``` And confirm it enters the if condition and set NVBUFFER\_BLEND: ```auto if (!all_yuv && (nvcomp->out_pix_fmt == NvBufferColorFormat_ABGR32)) { nvcomp->comp_params.composite_flag |= NVBUFFER_BLEND; } ``` ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 4, 2023, 10:10am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/6 "2023-01-04T10:10:01Z")
I modified the code as follows: ```auto if (!all_yuv && (nvcomp->out_pix_fmt == NvBufferColorFormat_ABGR32)) { nvcomp->comp_params.composite_flag |= NVBUFFER_BLEND; GST_INFO("%d = %f", i, nvcomp->comp_params.dst_comp_rect_alpha[i]); GST_INFO("0x%08x", nvcomp->comp_params.composite_flag); } ``` I get this debug when running the pipeline ```auto 0:00:00.380176840 11230 0x559ebcade0 INFO nvcompositor gstnvcompositor.c:1309:do_nvcomposite: 1 = 0.000000 0:00:00.380232934 11230 0x559ebcade0 INFO nvcompositor gstnvcompositor.c:1310:do_nvcomposite: 0x00000007 0:00:00.431282145 11230 0x559ebcade0 INFO nvcompositor gstnvcompositor.c:1309:do_nvcomposite: 2 = 0.000000 0:00:00.431332512 11230 0x559ebcade0 INFO nvcompositor gstnvcompositor.c:1310:do_nvcomposite: 0x00000007 ``` This confirms that NVBUFFER\_BLEND is being set. It strikes me as odd that the alpha value is 0 for both inputs, despite me specifying in the pipeline for them both to be 1.0. Manually modifying this alpha value within the source code doesn’t seem to have any effect on the output. I get the exact same debug for piplelines that use “memory:NVMM” and pipelines that do not use NVMM. However as I mention previously the pipeline without NVMM actually gives the correct result (albeit with poor framerates). I have attached the two pipelines for reference. [nvcompositor-with-nvmm.sh](https://forums.developer.nvidia.com/uploads/short-url/oT7E8xDm7f6p8VWXCpnumGdWS4l.sh) (703 Bytes) [nvcompositor-without-nvmm.sh.sh](https://forums.developer.nvidia.com/uploads/short-url/qAFZS8Nj0JCfW8j2V5XLFcU8GOT.sh) (612 Bytes) ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 4, 2023, 10:49am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/7 "2023-01-04T10:49:21Z")
Hi, Please manually set the alpha value and check if it works as expected. If yes, you can implement a property to configure alpha values. Here’s a patch of adding property for reference: [Gst for merging 4 webcams sometimes works, and sometimes it doesn't - #5 by DaneLLL](https://forums.developer.nvidia.com/t/gst-for-merging-4-webcams-sometimes-works-and-sometimes-it-doesnt/200014/5) ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 4, 2023, 11:11am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/8 "2023-01-04T11:11:55Z")
Just to note that there is already a property to set alpha values and perform blending. This already works as expected for both NVMM and non NVMM so there is no need for me to implement that. My specific issue is with the scenario where both inputs are set to alpha=1.0. If I set both inputs to alpha=0.5 in the sourcecode, then I see the camera feed with a png overlay (as expected), however the image is dark. I assume this is because the alpha data in the png is being interpreted as black pixel data and then being blended with the camera image. What I want to do is set both inputs to alpha=1.0 and directly overlay the png, making use of the alpha data that exists in the png source file. This works for non-NVMM, but when using NVMM memory, I just see the png file with a black background (completely covering the camera feed behind). The transparency information of the source doesn’t seem to be interpreted correctly. I’ve included examples below. Apologies for the poor quality [1] Alpha = 0.5, without NVMM (note the dark background) - Expected result ![alpha-0.5-without-nvmm](https://global.discourse-cdn.com/nvidia/original/3X/0/d/0df58690851d3a4782358cc394dcce40498db9f2.jpeg) [2] Alpha = 0.5, with NVMM (note the dark background) - Expected result ![alpha-0.5-with-nvmm](https://global.discourse-cdn.com/nvidia/original/3X/4/f/4f0c636556d0022064cd55e75e4acbf5ba25237f.jpeg) [3] Alpha = 1.0, without NVMM (note the lighter image) - Expected result ![alpha-1.0-without-nvmm](https://global.discourse-cdn.com/nvidia/original/3X/1/4/14ff504d57c1000287f47d40db8f60269aa3f890.jpeg) [4] Alpha = 1.0, with NVMM (note camera feed not seen) - Unexpected result ![alpha-1.0-with-nvmm](https://global.discourse-cdn.com/nvidia/original/3X/d/7/d723e01bb461fa9cffc1a0caeb46de154249260e.jpeg) Scenario [4] is the one I am trying to resolve. I would expect the output to match [3] given that all the settings are the same. ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 4, 2023, 1:02pm UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/9 "2023-01-04T13:02:25Z")
Hi, The use-case is not supported. _NvBufferComposite()_ blends each video plane in a fixed alpha value. It doesn’t handle the case that alpha value varies pixel by pixel. Would suggest use software _compositor_ plugin. If you would like to display text, another approach is to call _NvBufferMemMap()_ to get CPU pointer to the buffer, and use cairo APIs to put text. ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 4, 2023, 1:21pm UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/10 "2023-01-04T13:21:13Z")
Thanks for clarifying. As mentioned previously, the software compositor plugin is not suitable since my camera source is 3840x2160 30fps which the software compositor cannot keep up with. I need to display a dynamic Qt Widget based GUI overlay rather than just the text from my example, so cairo API’s aren’t suitable. It sounds like there is no official way to achieve the per-pixel alpha overlay that I require while making use of the NVIDIA hardware accelerated gstreamer plugins. Is there any plan to add support for this in the future? ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 5, 2023, 3:52am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/11 "2023-01-05T03:52:13Z")
Hi, Please share the PNG file and _gst-launch-1.0_ command for replicating the issue. To help us reproduce the phenomenon and then check with our teams. ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 5, 2023, 9:29am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/12 "2023-01-05T09:29:04Z")
Thank you, PNG file attached ![overlay0](https://global.discourse-cdn.com/nvidia/original/3X/6/9/696dfbdb17e6d5405c3c48a20cbddb81def4842c.png) ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 6, 2023, 1:42am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/13 "2023-01-06T01:42:13Z")
Hi, Thanks. It would be great if you can share gst-launch-1.0 command for working and non-working cases. ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 6, 2023, 8:55am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/15 "2023-01-06T08:55:31Z")
gst-launch-1.0 commands are attached as .sh scripts in a previous response. In case you can’t access those for some reason, I’ll include here as inline code **Working command (without NVMM)** ```auto gst-launch-1.0 nvcompositor name=comp sink_0::xpos=0 sink_0::ypos=0 sink_0::width=3840 sink_0::height=2160 sink_1::xpos=0 sink_1::ypos=0 sink_1::width=3840 sink_1::height=2160 ! nvoverlaysink sync=false nvv4l2camerasrc device=/dev/video0 ! "video/x-raw(memory:NVMM),format=UYVY,width=3840,height=2160,framerate=30/1" ! nvvidconv ! 'video/x-raw,format=RGBA,width=3840,height=2160' ! queue ! comp.sink_0 multifilesrc location="overlay0.png" caps="image/png,framerate=30/1" loop=false ! pngdec ! nvvidconv ! 'video/x-raw,format=RGBA,width=3840,height=2160' ! queue ! comp.sink_1 ``` **Non-working command (with NVMM)** ```auto gst-launch-1.0 nvcompositor name=comp sink_0::xpos=0 sink_0::ypos=0 sink_0::width=3840 sink_0::height=2160 sink_0::zorder=1 sink_0::alpha=1 sink_1::xpos=0 sink_1::ypos=0 sink_1::width=3840 sink_1::height=2160 sink_1::zorder=2 sink_1::alpha=1 ! nvoverlaysink sync=false nvv4l2camerasrc device=/dev/video0 ! "video/x-raw(memory:NVMM),format=UYVY,width=3840,height=2160,framerate=30/1" ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_0 multifilesrc location="overlay0.png" caps="image/png,framerate=30/1" loop=false ! pngdec ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_1 ``` If you don’t have a 3840x2160 30fps camera source available, you will need to replace the nvv4l2camerasrc input (comp.sink\_0) with a videotestsrc ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 11, 2023, 3:05am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/16 "2023-01-11T03:05:35Z")
Hi, We have checked this and the issue is because alpha effect is applied in _nvvidconv_ plugin and the frames to _nvcompositor_ do not contain the transparency. Please apply the patch to rebuild _nvvidconv_ plugin and try again: ```auto diff --git a/gst-nvvidconv-1.0/gstnvvconv.c b/gst-nvvidconv-1.0/gstnvvconv.c index 2019c11..ee23013 100644 --- a/gst-nvvidconv-1.0/gstnvvconv.c +++ b/gst-nvvidconv-1.0/gstnvvconv.c @@ -3204,6 +3204,19 @@ gst_nvvconv_transform (GstBaseTransform * btrans, GstBuffer * inbuf, space->isurf_flag = FALSE; } + if (space->in_pix_fmt == NvBufferColorFormat_ABGR32 && + space->out_pix_fmt == NvBufferColorFormat_ABGR32 && + space->flip_method == PROP_FLIP_METHOD_DEFAULT && + (!space->do_scaling)) + { + ret = gst_nvvconv_do_raw2nvconv (space, inmap.data, omem->buf->dmabuf_fd); + if (ret != TRUE) { + g_print ("%s: raw to nvrm conversion failed \n", __func__ ); + flow_ret = GST_FLOW_ERROR; + } + goto done; + } + ret = gst_nvvconv_do_raw2nvconv (space, inmap.data, space->interbuf.idmabuf_fd); if (ret != TRUE) { g_print ("%s: raw to nvrm conversion failed \n", __func__ ); ``` We run the command and can see expected output: ```auto $ gst-launch-1.0 nvcompositor name=comp sink_0::xpos=0 sink_0::ypos=0 sink_0::width=3840 sink_0::height=2160 sink_1::xpos=0 sink_1::ypos=0 sink_1::width=3840 sink_1::height=2160 ! nvoverlaysink nvarguscamerasrc ! "video/x-raw(memory:NVMM),format=NV12,width=1920,height=1080,framerate=30/1" ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_0 multifilesrc location="overlay%03d.png" loop=1 ! pngdec ! videoparse format=11 framerate=30/1 width=3840 height=2160 ! 'video/x-raw,format=RGBA,width=3840,height=2160' ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_1 ``` Please try it with your camera source _nvv4l2camerasrc_. And the png file is named to _overlay000.png_ ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 12, 2023, 5:00pm UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/17 "2023-01-12T17:00:03Z")
Thank you for providing this patch, it resolves the issue I was seeing. Makes sense that the issue was with nvvidconv now that you have pointed out the fix. I have one remaining issue. This patch works as long as the input and the output are of the same resolution (in my case 3840x2160). However if the input source resolution differs from the output resolution (e.g. 1920x1080 input and 3840x2160 output) then the alpha (transparency) information is lost, and a black background is observed. You can see in the patch code that the conversion does not run on any input that requires scaling. The “if” statement requires the condition:`(!space->do_scaling)` Would it be possible to update the patch to consider sources that require scaling and still need to retain alpha? If you would like to replicate the issue, I have modified your gstreamer command to scale down the png source to 1920x1080 (using nvvidconv) and then scale back up to 3840x2160 (using nvvidconv). You will see the alpha data is lost and you get a black background. Alternatively you could just use a 1920x1080 png image source. ```auto $ gst-launch-1.0 nvcompositor name=comp sink_0::xpos=0 sink_0::ypos=0 sink_0::width=3840 sink_0::height=2160 sink_1::xpos=0 sink_1::ypos=0 sink_1::width=3840 sink_1::height=2160 ! nvoverlaysink nvarguscamerasrc ! "video/x-raw(memory:NVMM),format=NV12,width=1920,height=1080,framerate=30/1" ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_0 multifilesrc location="overlay%03d.png" loop=1 ! pngdec ! videoparse format=11 framerate=30/1 width=3840 height=2160 ! 'video/x-raw,format=RGBA,width=3840,height=2160' ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=1920,height=1080' ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_1 ``` ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 13, 2023, 1:57am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/18 "2023-01-13T01:57:37Z")
Hi, > [@sam.faull](#): > > Would it be possible to update the patch to consider sources that require scaling and still need to retain alpha? This may not be possible since for doing scaling, it would need to call _NvBufferTransform()_. In this step the alpha is applied. Please scale it through _videoscale_ plugin, or have the overlay in same resolution. ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 13, 2023, 9:03am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/19 "2023-01-13T09:03:05Z")
I expected that might be the case. The reality of my situation is that my overlay source is actually a windowed application with a transparent background that I am grabbing using the _ximagesrc_ plugin. Combined with _nvcompositor_, this allows me to use the application as an OSD style overlay to the camera feed. When the overlay application is 3840x2160, _ximagesrc_ tends to drop frames since Xorg is single threaded and is maxing out one of the CPU cores. My hope was that I could drop the overlay application to 1920x1080 (this way no frames are dropped) and then scale the resolution up to 3840x2160 as part of the gstreamer pipeline before feeding it into the _nvcompositor_. My testing shows that the _videoscale_ plugin causes a drop in framerate because it’s a software based plugin so isn’t suitable. And as mentioned above, using a source of the same resolution is not feasible either due to Xorg. I don’t suppose there is an NVIDIA equivalent for _videoscale_ that would offer better performance? ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [January 17, 2023, 8:41am UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/20 "2023-01-17T08:41:14Z")
Hi, Please apply the attachment and check if you can successfully run a command like: ```auto $ gst-launch-1.0 nvcompositor name=comp sink_0::xpos=0 sink_0::ypos=0 sink_0::width=3840 sink_0::height=2160 sink_1::xpos=0 sink_1::ypos=0 sink_1::width=3840 sink_1::height=2160 ! nvoverlaysink nvarguscamerasrc ! "video/x-raw(memory:NVMM),format=NV12,width=1920,height=1080,framerate=30/1" ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_0 multifilesrc location="overlay%03d.png" loop=1 ! pngdec ! videoparse format=11 framerate=30/1 width=1920 height=1080 ! 'video/x-raw,format=RGBA,width=1920,height=1080' ! nvvidconv ! 'video/x-raw(memory:NVMM),format=RGBA,width=3840,height=2160' ! queue ! comp.sink_1 ``` [r32\_7\_TEST\_libnvbuf\_utils.zip](https://forums.developer.nvidia.com/uploads/short-url/7NJAOGjZDUVpkbId3FFKQHy2wwi.zip) (18.6 KB) Please backup the original lib before the replacement. ---
**Author:** ![sam.faull](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@sam.faull](https://forums.developer.nvidia.com/u/sam.faull)\ **Post date:** [January 17, 2023, 5:47pm UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/21 "2023-01-17T17:47:11Z")
This worked a treat! Thank you for taking the time to provide these patches. For anyone who stumbles across this post in the future and wants to get this working, install the two attached files to the following locations on the Jetson file system [libgstnvvidconv.so](https://forums.developer.nvidia.com/uploads/short-url/jKzwbpItnqcacjK0SesmvnWdGnL.so) (81.9 KB) **/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstnvvidconv.so** [libnvbuf\_utils.so](https://forums.developer.nvidia.com/uploads/short-url/69O0AWjZlpNoqDGlKcdtIauHWjS.so) (50.7 KB) **/usr/lib/aarch64-linux-gnu/tegra/libnvbuf\_utils.so** ---
**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\ **Post date:** [January 31, 2023, 5:47pm UTC](https://forums.developer.nvidia.com/t/transparent-overlays/237674/22 "2023-01-31T17:47:38Z")
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