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[Libav-User] Waiting For Sps/Pps When Sending H.264 Via Rtp

Di: Ava

I’m doing some experimentation with Microsoft’s Smooth streaming, and I have some questions regarding picture/sequence parameter sets in H.264. In Microsoft’s layout, this data is stored out of band in a so-called „manifest“ file. The data is marked „CodecPrivateData“, and, as I understand it, corresponds to FFmpeg’s extradata concept. Unfortunately, it wasn’t as simple So it seems that your encoder generated > SPS and PPS NAL units once, at the very start, but not thereafter. > > This should, however, be enough for VLC (as a RTSP client), because it > gets the SPS and PPS from the SDP (returned by a RTSP “DESCRIBE” command) > before it starts receiving the H.264/RTP stream.

デコードに必要な情報が不足 データが配信されていて映像が表示されない場合、デコードに必要な情報 (SPS, PPS)がないことが要因としてと考えられます。 例えばH.264では、符号化した映像データの他に以下の情報 (SPS, PPS)があります。 I have saved the RTP payloads in file and vlc can play the file without problem. So the RTP payloads is ok. But when payloads are sent to vlc in RTP packets, vlc fails to play the stream. Now the stream consists of one I frame and 299 P frames. We find that if I frame is repeated in the stream, vlc encounters the second I frame and will play normally. First, i think the sps and pps

h264 | 平凡備忘錄

RTP头之后一个字节为NALU头，就是SPS帧去掉00000001起始位标识，为67，之后为NALU单元RBSP数据，在编码是简单的做法就是RTP头后直接附加去除起始标识的NALU数据即可。 3.2 组合帧封装模式

H264码流中SPS PPS SEI概念及详解

本文介绍了VPS、SPS、PPS和H265技术在音视频开发中的应用及其相关知识，适合从事音视频开发的读者参考学习。 Hi all. I’ve built libffmpeg for Android and am trying to decode H.264 stream using it. I’m receiving that stream via RTMP connection and passing all video packets (excluding first byte that contains flags related to RTMP) to the avcodec_decode_video2 function. With H.263 it works perfectly, but when I try to use the same code (only with codec ID changed) for H.264, every call to avcodec Hello. I’m developing live streaming application using OAK-1 Camera. To stream video I need to extract SPS, VPS from video data. I successfully retrieved H264 data by referring to this article. Whe

H.264 video codec This page is all about H.264, also known as Advanced Video Coding (AVC), MPEG-4 Part 10, or MPEG-4 AVC. ③ 上图还显示了SPS、PPS、SEI的RTP包固定头，Seq初始值不为0，为随机值，并且一个RTP包就顺序+1，这跟上面分析的一致； ④ 上面SPS、PPS、SEI本身不涉及时间戳，但是这里头填充为和自己后面的第一个RTP保持一致，同样IDR的NALU切分的不同RTP包时间戳 H.264 organizes its video data into Network Abstraction Layer (NAL) units, allowing seamless integration with network protocols. These units, which include Video Coding Layer (VCL) data and metadata elements like Sequence Parameter Sets (SPS) and Picture Parameter Sets (PPS), ensure structured data transmission.

  • VLC不能播放H264的RTP流，为什么？
  • [Libav-user] Decoding H.264
  • Determine the end of H.264 I-frame in RTP stream
  • [libav-user] SDP for H.264 about extradata

Looking at the various MMAL_PARAMETER_* ids in mmal_parameters_video.h some of them look quite promising – but many of them are only mentioned in the enum that declares them – I can’t see any code that refers to them. Does anyone happen to know if it’s possible to persuade the GPU to stuff a SPS/PPS pair in at the start of each group Bundle suitable SPS/PPS NAL units into STAP-A aggregate packets. This can potentially reduce RTP packetization overhead but not all RTP implementations handle it correctly. B sends SPS/PPS packets in the beginning and freepbx does not fwd them to A, again when A sends SPS/PPS packets to freepbx, they are not fwded to B neither. So in both directions Freepbx does not let SPS/PPS packets transfered.

Hello, I have several problem when I want to decode a H264 video send by RTP. I’m using libavcodec to decode video but I build my own SDP parser. If you have time, can you tell me where is the problem in my method. I create a structure to store SDP data : typedef struct { int packetization_mode; uint8_t profile_idc; uint8_t profile_iop; uint8_t level_idc; int

[vlc] vlc stop when playing H.264 RTP stream

VLC不能播放H264的RTP流，其日志总提示“waiting for SPS/PPS”，为什么呢？ Hi. I am not sure about the following setup. I create elementary h264 bitstream using h264 encoder. I append SPS PPS nals to the start of the stream because I stream this raw bitstream to some presentation endpoint. But now I also have a use case where I wrap that stream into mp4 container. Should I still append the SPS PPS header both into the container header and into I have a series of grayscale image in OpenCV, and I would like to stream it through GStreamer. Firstly, to check that gstreamer works well, I

And I got the information from ffmpeg that „H.264 bitstream malformed, no startcode found, use the h264_mp4toannexb bitstream filter (-bsf h264_mp4toannexb)“. So I initiated the h264_mp4toannexb bitstreamfilter and use av_bitstream_filter_filter to process the packet before write them to output file.

I’ve made it to parse the decoder configuration >> >> record, extract SPS, PPS and some other things. I’ve tried to pass PPS and >> SPS to avcodec_decode_video2 but it still returns -1, prints „no frame!“ >> and does not decode anything else. Overview I am trying to stream compressed video from a Xavier via RTP over UDP to a remote PC. I require the stream to be h264 or h265 (since we will be using the hardware encoders), and will be transported over an isolated ethernet local network. I am having issues with the udpsink on the xavier NX and AGX devices. It looks like it is sending an empty payload. My

I’ve made it to parse the decoder configuration >> >> record, extract SPS, PPS and some other things. I’ve tried to pass PPS and >> SPS to avcodec_decode_video2 but it still returns -1, prints „no frame!“ >> and does not decode anything else. SDP中的H.264的SPS和PPS串，包含了初始化H.264解码器所需要的信息参数，包括编码所用的profile，level，图像的宽和高，deblock滤波器等。 由于SDP中的SPS和PPS都是BASE64编码形式的，不容易理解，附件有一个工具软件可以对SDP中的SPS和PPS进行解析。 用法是在命令

H.264 video codec — Kurento 7.2-dev documentation

[00007f445008aea0] hevc packetizer: Waiting for VPS/SPS/PPS [00007f445008aea0] hevc packetizer: Waiting for VPS/SPS/PPS [00007f445008aea0] hevc packetizer: Waiting for VPS/SPS/PPS [00007f445008aea0] hevc packetizer: Waiting for VPS/SPS/PPS Expected behavior Unable to play rtsp stream via vlc or record through shinobi. I’ve been trying over the past week to implement H.264 streaming over RTP, using x264 as an encoder and libavformat to pack and send the stream. Problem is, as far as I can tell it’s not working I have an H.264 file which, if I read sequentially without using seek_av_frame, is fine and all frames are decoded OK. However, if I attempt to seek into the middle of the file and then read sequential frames, the library raises all sorts of errors (see below – a mixture of debug output from Libav and my own application) Can anyone tell me what is going on here. There’s obviously

Previous message: [Libav-user] Unable to decode H.264 stream received via RTMP Next message: [Libav-user] Unable to decode H.264 stream received via RTMP Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] I am currently sending individual NAL units across a network. These NAL units are generated by x264. Now is it possible to feed these NAL units individually into avcodec_decode_video2? Or do I have to concatenate the nal units until they represent the same frame? If thats the case then how is that done? I have also read that I might be able to receive the SPS and PPS packets. Then There isn’t any NALU header as this has already been stripped. The format being sent to the decoder is Annex B. The Annex B start code (4 bytes 0x00 0x00 0x00 0x01) is replaced with the length of the H.264 packet, which is consistent with the format I see in an MP4 created by ffmpeg. I will change the code back to not combine the SPS & PPS with the I Frame

RTSP sets up the connection using TCP – this seems to work in your case. RTP should send audio and video using UDP – this seems to fail in your case. core debug: Buffering 0% live555 warning: no data received in 10s, eof ? Your embedded device should UDP packets to VLC. Do you see any UDP traffic from from your embedded device to VLC using Wireshark? Environment: I have an IP Camera, which is capable of streaming it’s data over RTP in a H.264 encoded format. This raw stream is recorded from the ethernet. With that data I have to work. Goal: 2 I have an encoder that produces a series of H.264 I-frames and P-frames. I’m trying to use libavformat to mux and transmit these frames over RTP, but I’m stuck. My program sends RTP data, but the RTP timestamp increments

You’ll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What’s reputation and how do I get it? Instead, you can save this post to reference later. SDP中的H.264的SPS和PPS串，包含了初始化H.264解码器所需要的信息参数，包括编码所用的profile，level，图像的宽和高，deblock滤波器等。 由于SDP中的SPS和PPS都是BASE64编码形式的，不容易理解，附件有一个工具软件可以对SDP中的SPS和PPS进行解析。 用

Abstract When used in the Session Description Protocol Offer/Answer model, several of the media format parameters for the H.264 video format, and for its Scalabile Video Codec (SVC) extension, describe characterics of the stream an endpoint is prepared to send, not of streams it is prepared to receive.

In general when transmitting or packaging the H.264 compressed video, the picture data is (obviously) included. However, the Meta data (PPS, SPS and SEI) may or may not be. The H.264 standard has been written to allow the metadata to be sent separately from the picture data, as long as it arrives at the decoder sufficiently in advance. When using RTP to transmit H264, it is necessary to use the SDP protocol description, two of which are: Sequence Parameter sets (SPS) and picture Parameter Set (PPS) need to be used, then where are these two items obtained from?