ffmpeg

How do I encode KLV packets to an H.264 video using libav*

由 只愿长相守 提交于 2021-01-21 05:12:10
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

How do I encode KLV packets to an H.264 video using libav*

由 谁都会走 提交于 2021-01-21 05:10:46
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

How do I encode KLV packets to an H.264 video using libav*

由 血红的双手。 提交于 2021-01-21 05:08:33
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

How do I encode KLV packets to an H.264 video using libav*

由 北战南征 提交于 2021-01-21 05:08:14
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

Thread Safety of LibAv/FFMpeg?

由 六眼飞鱼酱① 提交于 2021-01-21 04:49:41
问题 Is LibAV/FFMpeg thread safe? For example. Could i read from a file using AVFormatContext* in one thread and decode the read packet it in another with simple additions of mutexes or is the thread safetyness of the library a "don't know don't care" type deal? I know that libav has basic support for encoder threads but i'm trying more of a blackbox type approach where i break it up into multiple threads (Source -> Decoder -> Filter -> Encoder -> Sink) and trying to understand the complications

Thread Safety of LibAv/FFMpeg?

由 北城余情 提交于 2021-01-21 04:49:26
问题 Is LibAV/FFMpeg thread safe? For example. Could i read from a file using AVFormatContext* in one thread and decode the read packet it in another with simple additions of mutexes or is the thread safetyness of the library a "don't know don't care" type deal? I know that libav has basic support for encoder threads but i'm trying more of a blackbox type approach where i break it up into multiple threads (Source -> Decoder -> Filter -> Encoder -> Sink) and trying to understand the complications

FFMPEG doesn't work with mp4 and stdout

由 萝らか妹 提交于 2021-01-21 04:38:42
问题 I need to add text to mp4 video. If I write result to file then everything is OK, but I want to read data from ffmpeg stream. I run command: ffmpeg -i sample.mp4 -filter_complex "drawtext='text=\"Sample Text\"':x=(w-text_w)/2:y=(h-text_h-line_h)/2:fontsize=40:fontcolor=white:fontfile=TimesNewRoman.ttf:enable='between(t,1,5)'" -f mp4 - I received the following error: ffmpeg version 2.2.2-tessus Copyright (c) 2000-2014 the FFmpeg developers built on May 7 2014 23:17:42 with clang version 3.3

FFMPEG doesn't work with mp4 and stdout

由 谁都会走 提交于 2021-01-21 04:38:01
问题 I need to add text to mp4 video. If I write result to file then everything is OK, but I want to read data from ffmpeg stream. I run command: ffmpeg -i sample.mp4 -filter_complex "drawtext='text=\"Sample Text\"':x=(w-text_w)/2:y=(h-text_h-line_h)/2:fontsize=40:fontcolor=white:fontfile=TimesNewRoman.ttf:enable='between(t,1,5)'" -f mp4 - I received the following error: ffmpeg version 2.2.2-tessus Copyright (c) 2000-2014 the FFmpeg developers built on May 7 2014 23:17:42 with clang version 3.3

Windows下给予Nginx构建流媒体推拉流测试环境

由 随声附和 提交于 2021-01-20 10:25:34
一、 什么是媒体服务器 媒体服务器这个名词最初来自于 NGN （下一代网络），在软交换设备控制下提供 IP 网络上各种媒体资源管理功能，含视频、音频、图片、图文消息等等。 后来逐渐演化为流媒体服务器，从而提供以流的方式推送、存储、拉动媒体资源，尤其是实时和准实时的音视频资源。 应用领域包括视频直播、视频点播、短视频、视频会议、远程教育、远程医疗等。 著名的开源媒体服务器，包括 Red5 Server 、 Live555 、 EasyDarwin 、 Open Streaming Server 、 Nginx+RTMP 等。 二、 什么是 Nginx 当前（ 2020 ）， web 服务大量使用 Nginx 作为反向代理服务器。 Nginx 最初由俄国人伊戈尔·赛索耶夫在 2004 年开发，采用 BSD 许可证。 除了反向代理外， Nginx 还是一个轻量级 web server ，是 Apache web server 的替代者，并发连接数可以达到 5 万以上。 另外， Nginx 还能被用来搭建负荷均衡服务器和邮件代理服务器。 更主要的是， nginx 配合 RTMP 插件能够适应直播潮流，成为性能优良的流媒体服务器。 三、 Windows 下编译 nginx 1, 官网下载地址： http://nginx.org/en/download.html ，需要下载源代码自行编译。 2

How to combine The video and audio files in ffmpeg-python

由 自作多情 提交于 2021-01-20 04:39:53
问题 I'm trying to combine a video(with no sound) and its separate audio file I've tried ffmpeg ffmpeg -i video.mp4 -i audio.mp4 -c copy output.mp4 and it works fine. i'm trying to achieve the same output from ffmpeg-python but with no luck. Any help on how to do this? 回答1: I had the same problem. Here is the python code after you have pip install ffmpeg-python in your environment: import ffmpeg input_video = ffmpeg.input('./test/test_video.webm') input_audio = ffmpeg.input('./test/test_audio.webm
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