$ ffmpeg -r 0.1 -i img001.jpg -vcodec libx264 -pix_fmt yuv420p one_img_to_video_small_rate.mp4 通过下图,可以看到延长时长的目的确实达到了,但是这种方式生成的MP4其实是有问题的,不仅剪辑软件无法支持(比如剪映),在添加音频、字幕的时候也非常奇怪(血的教训)。 第二种方式是增加图片数量,这也是我...
参考: Combine one image + one audio file to make one video using FFmpeg 中"community wiki"的回答,使用如下ffmpeg命令可以正常生成Video_Duration和Audio_Duration接近的视频 现象是明明是第一个PPT的录音,画面已经翻到PPT第二页了,录音还在播放第一页PPT尾段的录制语音 原因:通过 mediainfo 查...
FFmpegis a cross-platform solution to record, convert and edit audio and video. It is a command line tool to convert one video file format to another. However, you could also find a FFmpeg GUI for user-friendly video editing. In this article, we will show you how to use FFmpeg for da...
在使用原生ffmpeg之前,笔者使用了几个第三方的nuget库,如:FFmpeg.AutoGen、Xabe.FFmpeg、Accord.Video.FFMPEG。前两个库要么只支持将文件夹里现有的图片保存为mp4,要么不支持设置每帧的PTS,导致生成的mp4播放速度太快。最后选用了Accord.Video.FFMPEG,这个库能满足上述的三个需求点。无奈此库已长期不维护,当上游的FP...
We read every piece of feedback, and take your input very seriously. Include my email address so I can be contacted Cancel Submit feedback Saved searches Use saved searches to filter your results more quickly Cancel Create saved search Sign in Sign up Reseting focus {...
@Lukasdotcom @theresagresch I wonder if it makes sense to only allow standard video resolutions to be specified? So HD, Full HD, Ultra HD, 2K and 4K. For example, few users will know that 4K actually means 3840 × 2160, and NOT a width of 4000 or 4096 pixels, as one might assume...
参考:Combine one image + one audio file to make one video using FFmpeg 中"community wiki"的回答,使用如下ffmpeg命令可以正常生成Video_Duration和Audio_Duration接近的视频 ffmpeg -loop 1 -i xuanwu.jpg -i 1.aac-c:v libx264 -tune stillimage-c:a aac-b:a 192k -pix_fmt yuvj420p -shortest ...
QImageimage=tmpImg.copy();//把图像复制一份 传递给界面显示 emitsig_GetOneFrame(image);//发送信号 1. 2. 3. 4. 主线程绑定并接收信号: mPlayer=newVideoPlayer; connect(mPlayer,SIGNAL(sig_GetOneFrame(QImage)),this,SLOT(slotGetOneFrame(QImage))); ...
ffmpeg:(Hyper fast Autio and Video encoder)超快音视频编码器(类似于爱剪辑)。 ffplay:(Simple media player)简单媒体播放器 ffprobe:(Simple multimedia streams analyzer)简单多媒体流分析器 在上面官网图片里面中,如果大家要详细了解ffmpeg、ffplay、ffprobe三个工具的使用,可以点击进去,里面有非常详细的介绍!这里接...
explicit videoCode(QObject *parent = 0); //编码一帧图片的函数 void codeingOneFrame(AVFrame *frame); AVOutputFormat *outputformat; //视频文件上下文格式 AVFormatContext* avformat_context; //编解码器上下文格式 AVCodecContext* avcodec_context;