Is it possible to view the output of a surface decoder? // our desired properties. From that you can create a Surface, using the sole constructor. Sending the MediaCodec decoder output to a SurfaceView is straightforward, as is sending the output to a MediaCodec encoder. You can send the output of the decoder to a single Surface. As for decoding you can create some surface in your UI and pass it to decoder using configure() it will allow the decoder to render a decoded frame into the surface so you won't need to copy decoded data from output buffers of decoder the only thing you should do is to pass I don't understand the use of diodes in this diagram, Promote an existing object to be part of a package. QGIS - approach for automatically rotating layout window, I need to test multiple lights that turn on individually using a single switch. I'm trying to stream data (h.264 raw 1080p) to android and rendering it to surface view.The problem is that if I send the data faster than 45fps the decoder output is pixelated(the input index & output index are -1 or not ready). How does it work The working flow as below camera preview data (YV12) -> YUV420sp -> MediaCodec -> H.264 data -> UDP Is it possible for SQL Server to grant more memory to a query than is available to the instance. // The storage associated with the direct ByteBuffer may already be unmapped, // so attempting to access data through the old output buffer array could, // this happens before the first frame is returned, "unexpected result from deocder.dequeueOutputBuffer: ", // As soon as we call releaseOutputBuffer, the buffer will be forwarded, // to SurfaceTexture to convert to a texture. Request a Surface to use for input. It suppresses B frames. * to read and generate frames in this format). If the parameter set is the same value as in the previous frame the encoder drops it. // are multiples of 16, which all tested devices seem to be able to handle. If there's no output yet, we either need to, // provide more input, or we need to wait for the encoder to work its magic. But if I set the render flag to "False" in releaseOutputBuffer() I am able to achieve 75fps (the input & output indexes I receives are normal). Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Position where neither player can force an *exact* outcome, Is it possible for SQL Server to grant more memory to a query than is available to the instance. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. So is there a way to "unlock" the frame rate? Contribute to PhilLab/Android-MediaCodec-Examples development by creating an account on GitHub. . I've been rendering video through the MediaCodec directly to a Surface that was taken from a SurfaceView in my UI. Find centralized, trusted content and collaborate around the technologies you use most. Learn more about bidirectional Unicode characters. or another way to render faster. Solution 1: You can use the input surface of a codec for ecoding video frames, you can get this surface using createInputSurface() then (if you don't use NDK) you can get the canvas from the surface and draw frames on it or you can use NDK and copy frame data to the surface buffer, both of this approaches in the result will give you encoded frame data. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Thanks for contributing an answer to Stack Overflow! // e.g. How to copy build files from one container to another or host on docker, Inelastic nucleon-nucleon cross section at LHC energies, Find number of occurrences of a character in a string javascript, How to create choice field in django model using another model, How to unlink library from react-native project, SQL : keep count in row or select count from db, How to animate each element's jquery function before moving to the next page, Php count returns 1 instead of real array length, Declarative Pipeline Jenkinsfile: Export variables out of sh call, Converting file to base64 on Javascript client side, Use of isolate scope - @, &, and = in a simple Angular Directive, Filter pandas (python) dataframe based on partial strings in a list, Discord.py - send embed in custom exception, Display two dataframes side by side in Pandas, Strings.Replace() Function in Golang With Examples, Android encoding using MediaCodec and a Surface. How do you generate random patterns and convert them to an image? * Tests encoding and subsequently decoding video from frames generated into a buffer. "WARNING: width or height not multiple of 16". I think this works. Surface uses native video buffers without mapping or copying them to ByteBuffers; thus, it is much more efficient. * We encode several frames of a video test pattern using MediaCodec, then decode the. Php jquery button click event not working, Html detect input change jquery code example, Shell sql python return rows code example, Find first occurrence of list code example. Cannot retrieve contributors at this time. // of algebra and assuming that stride==width and sliceHeight==height yields: // Save a copy to disk. How to get a random number between 1 and 10 python, How to create a multi-partition USB drive that also acts as the bootable ubuntu.iso? I'm working with Android MediaCodec and use it for a realtime H264 encoding and decoding frames from camera. you should use a Surface for raw video data to improve codec performance It is decoding the mp4 file when I tried decoding H264 file it was not able to read the H264 encoded file. Sending the MediaCodec decoder output to a SurfaceView is straightforward, as is sending the output to a MediaCodec encoder. [duplicate]. It can't even try to encode frame 2(B) until it has encoded frame 5(P). //from https://github.com/vecio/MediaCodecDemo, // We shouldn't stop the playback at this point, just pass the EOS, // flag to decoder, we will get it again from the, "We can't use this buffer but render it due to the API limit, ", // We use a very simple clock to keep the video FPS, or the video, // All decoded frames have been rendered, we can stop playing now. Base Kotlin. The result is always the same. By, // doing this on every loop we're working to ensure that the encoder always has, // We don't really want a timeout here, but sometimes there's a delay opening. BigFlake BigFlake is the best site for starting with. use MdieCodec. // need to wait for the onFrameAvailable callback to fire. Android MediaCodec encode raw video to h264. I also tried to use HW accelerated codec and it's the only thing that helped me, when I use it the latency reduces to ~ 500-800 milliseconds but it still doesn't fit me for a realtime streaming. Data is encoded from, * a series of byte[] buffers and decoded into ByteBuffers. It looks like this: * We draw one of the eight rectangles and leave the rest set to the zero-fill color. Your approach of dropping encoded B frames won't help with latency. Android - MediaCodec - can an encoder's input Surface, Yes. * which we must carefully forward to the decoder. * Checks the frame for correctness. How do I use Surface to improve encode or decode performance? * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. as "render" argument to releaseOutputBuffer() of the decoder. (This is a huge step up from what was there when this page was . If no, * match is found, this throws a test failure -- the set of formats known to the test, * Returns true if this is a color format that this test code understands (i.e. Base Android studio 4.1.1; Use Android MediaCodec. rev2022.11.7.43014. Note this is a raw elementary. GitHub Gist: instantly share code, notes, and snippets. The CTS test framework seems to be configuring a Looper on, * the test thread, so we have to hand control off to a new thread for the duration of, testEncodeDecodeVideoFromBufferToSurfaceQCIF, testEncodeDecodeVideoFromBufferToSurfaceQVGA, testEncodeDecodeVideoFromBufferToSurface720p, /** Wraps testEncodeDecodeVideoFromBuffer(true) */, * Tests streaming of AVC video through the encoder and decoder. The idea is to sample, * one pixel from the middle of the 8 regions, and verify that the correct one has, * the non-background color. "unexpected result from encoder.dequeueOutputBuffer: ". I don't understand the use of diodes in this diagram, Space - falling faster than light? * Generates the presentation time for frame N, in microseconds. Is it possible to make a high-side PNP switch circuit active-low with less than 3 BJTs? Frames sent to SurfaceView's Surface aren't dropped, so your This parameter represents the recording time of your frame and needs therefore to increase by the number of us between the frame that you want to encode and the previous frame. * See {@link #generateFrame} for a description of the layout. Here are some of the examples of using it. Instantly share code, notes, and snippets. As a test, I want to render to the Surface (as in above) and loopback through a different instance of MediaCodec configured as an encoder. If we don't, // Decoder is drained, check to see if we've got a new buffer of output from, // Get a decoder input buffer, blocking until it's available. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // If we're decoding to a Surface, we'll get notified here as usual but the. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. I'm not entirely sure what's going on -- the rate at which decoded frames are delivered to SurfaceView should not affect the quality of the output. Data is provided through. encodeCodec.queueInputBuffer(inputBufferIndex, 0, input.length, (System.currentTimeMillis() - startMs) * 1000, 0); Online free programming tutorials and code examples | W3Guides, AVC HW encoder with MediaCodec Surface reliability?, The only working encoder resolution that works looks to be 1280 x 720 (probably because it's the only one multiple of 16), and that one works terrible too, with a FPS of 7-8 in the output. The output is checked for validity. The various. So . // if the codec is meeting requirements). The output is checked for, testEncodeDecodeVideoFromBufferToBufferQCIF, testEncodeDecodeVideoFromBufferToBufferQVGA, testEncodeDecodeVideoFromBufferToBuffer720p, * a series of byte[] buffers and decoded into Surfaces. How to understand MediaCodec's user surface to improve codec performance? Is this meat that I was told was brisket in Barcelona the same as U.S. brisket? What tool can I use to transcode my videos to Webm? To review, open the file in an editor that reveals hidden Unicode characters. Can lead-acid batteries be stored by removing the liquid from them? will block if you attempt to feed it frames faster than the device refresh rate. * See the License for the specific language governing permissions and, * Generates a series of video frames, encodes them, decodes them, and tests for significant, * We copy the data from the encoder's output buffers to the decoder's input buffers, running. You can use the input surface of a codec for ecoding video frames, you can get this surface using createInputSurface() then (if you don't use NDK) you can get the canvas from the surface and draw frames on it or you can use NDK and copy frame data to the surface buffer, both of this approaches in the result will give you encoded frame data. Thanks a lot for the explanation, I've just tried to specify a profile level that you mentioned above but unfortunately it didn't help me, I also tried to use a regular base and main profiles but got the same result - the latency didn't change. You can use the input surface of a codec for ecoding video frames, you can get this surface using createInputSurface() then (if you don't use NDK) you can get the canvas from the surface and draw frames on it or you can use NDK and copy frame data to the surface buffer, both of this approaches in the result will give you encoded frame data. You can find various examples in Grafika, and a longer explanation of the mechanics in the graphics architecture doc. This may still be more efficient than using ByteBuffers, as some native buffers may be mapped into direct ByteBuffers. How to stop EditText from gaining focus when an activity starts in Android? It suppresses B frames. Similar to {@link #checkFrame}, but uses GL to. If I use the Surface created by the encoder, my decoder instance throws an IllegalStateException at dequeueOutputBuffer. releaseOutputBuffer() Use MediaCodec Decoder examples. If we don't, the test will, * pass, but we won't actually test the output because we'll never receive the "frame, * available" notifications".
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