ffmpeg -y -hide_banner -i"input.mp4"-vfscale=1920:1080 video_1080.mp4 可以自选加一下编码器、码率、压制预设等设定 缩小到720p(用于处理上传大小限制)比如QQ群啥的你只是想分享一下好看的视频当然不需要那么大对不对 ffmpeg -y -hide_banner -i"input.mp4"-vfscale=1280:720 video_720.mp4 可以自选...
使用命令：ffmpeg i video.mp4 q:a 0 map a output.mp3功能：从video.mp4中提取音频并保存为mp3格式，q:a 0表示最高质量。调整视频分辨率：使用命令：ffmpeg i input.mp4 vf scale=1280:720 output.mp4功能：将视频分辨率调整为1280x720。视频压缩：使用命令：ffmpeg i input.mp4 vcodec libx264 ...
https://www.bugcodemaster.com/article/changing-resolution-video-using-ffmpeg ./ffmpeg -i sample_outdoor_car_1080p_10fps.h264 -vf scale=1280:720 sample_outdoor_car_720p_10fps.h264 Convert 640x480 mp4 to 1280x960 mp4 $ ffmpeg -i subject_001.mp4 -vf scale=1280:960 1280_960_subject_...
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, shrink-to-fit=no"> <meta name="renderer" content="webkit"> <meta name="force-rendering" content="webkit"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <title>DPlayer</title> <st...
ffmpeg -i input.mp4 -r 25 -qscale 0 -q:v 1 -c:a aac -b:v 20000k -vf scale=2048:-1 output.mp4 1. -qscale value:使用固定的视频量化标度(VBR),以value质量为基础的VBR,取值0.01-255,越小质量越好 -q:v:表示存储jpeg的图像质量
ffmpeg -i input.mp4 -vf scale=-1:720 output.mp4 The resulting video will have a resolution of1280x720. This is because1080 / 720=1.5. Thus, thewidthis scaled to1920 / 1.5 = 1280pixels. Use Variables to Scale/Change Resolution of a Video in FFmpeg ...
如果你看到类似上述的输出,说明你的英特尔GPU卡支持VAAPI,那么你可以使用下面的命令来执行scale: 代码语言:shell 复制 $ ffmpeg-hwaccelvaapi\-hwaccel_device/dev/dri/renderD129\-hwaccel_output_formatvaapi\-igravity.mp4\-vf"scale_vaapi=w=1024:h=428"\-c:vh264_vaapi\-b:v1M\out.mp4 ...
例如，将mov文件转换为webm文件：bashffmpeg i input.mov c:v libvpxvp9 pix_fmt yuv444p10le vf "format=yuva444p10le,alphaextract,scale=iw:ih[alpha][video];[video][alpha]overlay=0:0" b:v 2M output.webm注意：此命令中的参数可能需要根据实际情况进行调整，特别是编码器和像素格式部分...
Then, type in ‘cmd’ in the address bar and press ‘Enter’ to bring up the FFmpeg command window. 🔔 TIPS: Typically, you can reduce a video size using these video compression methods: 1. Utilize a more efficient codec. 2. Downscale the video resolution. 3. Lower the video bitr...
("buffersink");scale = avfilter_get_by_name("scale");overlay = avfilter_get_by_name("overlay");// 创建滤镜图filter_graph = avfilter_graph_alloc();// 创建并配置源滤镜节点char args[512];snprintf(args, sizeof(args),"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d"...