本文介绍如何使用FFmpeg工具从FLV视频文件中提取特定帧并将其保存为JPG图片序列。内容包括指定视频尺寸、禁用音频输出、选择特定时间段内的帧进行转换等技巧。
Convert FLV to jpg sequence
ffmpeg -i video.flv -an -r 1 -y -s 320x240 video%d.jpg
-i Input file name
-an disable audio
-r fps
-y overwrite file
-s output dimension
Convert particular frame to jpg
ffmpeg -i video.flv -an -ss 00:00:03 -t 00:00:01 -r 1 -y -s 320x240 video%d.jpg
-ss record start time
-t record end time last for
So if you want to save frame 4 (00:00:04) -ss 00:00:03 -t 00:00:01. Note: it is count from 00:00:00. Even you want to save one jpg, you still need to use %d for naming, it is strange that I grab one frame for one second, it will return two identical jpg files for me
ffmpeg -i video.flv -an -r 1 -y -s 320x240 video%d.jpg
-i Input file name
-an disable audio
-r fps
-y overwrite file
-s output dimension
Convert particular frame to jpg
ffmpeg -i video.flv -an -ss 00:00:03 -t 00:00:01 -r 1 -y -s 320x240 video%d.jpg
-ss record start time
-t record end time last for
So if you want to save frame 4 (00:00:04) -ss 00:00:03 -t 00:00:01. Note: it is count from 00:00:00. Even you want to save one jpg, you still need to use %d for naming, it is strange that I grab one frame for one second, it will return two identical jpg files for me
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