rtp

Detect MPEG4/H264 I-Frame (IDR) in RTP stream

由 我是研究僧i 提交于 2019-11-26 18:54:37
问题 I need to detect MPEG4 I-Frame in RTP packet. I know how to remove RTP header and get the MPEG4 frame in it, but I can't figure out how to identify the I-Frame. Does it have a specific signature/header? 回答1: Ok so I figured it out for h264 stream. How to detect I-Frame: remove RTP header check the value of the first byte in h264 payload if the value is 124 (0x7C) it is an I-Frame I cant figure it out for the MPEG4-ES stream... any suggestions? EDIT: H264 IDR This works for my h264 stream (

MediaCodec and Camera: colorspaces don't match

由 試著忘記壹切 提交于 2019-11-26 14:16:29
I have been trying to get H264 encoding to work with input captured by the camera on an Android tablet using the new low-level MediaCodec . I have gone through some difficulties with this, since the MediaCodecAPI is poorly documented, but I've gotten something to work at last. I'm setting up the camera as follows: Camera.Parameters parameters = mCamera.getParameters(); parameters.setPreviewFormat(ImageFormat.YV12); // <1> parameters.setPreviewFpsRange(4000,60000); parameters.setPreviewSize(640, 480); mCamera.setParameters(parameters); For the encoding part, I'm instantiating the MediaCodec

How to process raw UDP packets so that they can be decoded by a decoder filter in a directshow source filter

由 蹲街弑〆低调 提交于 2019-11-26 10:12:53
Long Story: There is an H264/MPEG-4 Source I can able to connect this source with RTSP protocol. I can able to get raw UDP packets with RTP protocol. Then send those raw UDP packets to a Decoder[h264/mpeg-4] [DS Source Filter] But those "raw" UDP packets can not be decoded by the Decoder[h264/mpeg-4] filter Shortly: How do I process those raw UDP data in order to be decodable by H264/ MPEG-4 decoder filter? Can any one clearly identify steps I have to do with H264/MPEG stream? Extra Info: I am able to do this with FFmpeg... But I can not really figure out how FFmpeg processes the raw data so

How to process raw UDP packets so that they can be decoded by a decoder filter in a directshow source filter

由 血红的双手。 提交于 2019-11-26 08:50:42
问题 Long Story: There is an H264/MPEG-4 Source I can able to connect this source with RTSP protocol. I can able to get raw UDP packets with RTP protocol. Then send those raw UDP packets to a Decoder[h264/mpeg-4] [DS Source Filter] But those \"raw\" UDP packets can not be decoded by the Decoder[h264/mpeg-4] filter Shortly: How do I process those raw UDP data in order to be decodable by H264/ MPEG-4 decoder filter? Can any one clearly identify steps I have to do with H264/MPEG stream? Extra Info: I

MediaCodec and Camera: colorspaces don&#39;t match

由 雨燕双飞 提交于 2019-11-26 03:51:29
问题 I have been trying to get H264 encoding to work with input captured by the camera on an Android tablet using the new low-level MediaCodec. I have gone through some difficulties with this, since the MediaCodecAPI is poorly documented, but I\'ve gotten something to work at last. I\'m setting up the camera as follows: Camera.Parameters parameters = mCamera.getParameters(); parameters.setPreviewFormat(ImageFormat.YV12); // <1> parameters.setPreviewFpsRange(4000,60000); parameters.setPreviewSize
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