ffmpeg - 以相反的顺序将图像序列转换为视频 [英] ffmpeg - convert image sequence to video with reversed order
问题描述
查看文档,它是对于我来说,ffmpeg是否允许我以相反的顺序将图像序列转换为视频,例如使用以下顺序,对我来说不太明显:
Looking at the docs, it is not apparent to me whether ffmpeg would allow me to convert an image sequence to a video in reverse order, for example using this sequence:
frame-1000.jpg
frame-999.jpg
frame-998.jpg
...
frame-1.jpg
是否可以为框架索引给出step direction?
Is it possible to give a "step direction" for the frame indices?
推荐答案
由于您的命名方案发生,您将会幸运。
Due to happenstance of your naming scheme, you're in luck.
FFmpeg的图像序列解码器有一个起始号码选项, ve确认它接受负值。
FFmpeg's image sequence demuxer has a start number option and I've confirmed that it accepts negative values.
所以,
ffmpeg -start_number -1000 -i frame%d.jpg reversed.mp4
这里' - '必须被解释为数字系列的一部分,所以它是 frame%d
而不是 frame-%d
。
Here the '-' has to be interpreted as part of the number series, so it's frame%d
and not frame-%d
.
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