Ffmpeg子进程check_call中的concat字符串

Question

需要在子进程命令中替换filename，即filename

filename = '\'D\:/imagesequence/thumbnail.jpg\''


task = '\"movie= ' + filename + '[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]\"'

C= subprocess.check_call("ffmpeg"，"-i"，“D:/imagesequence/background222.jpg 222.jpg”，"-vf"，task，"D:/imagesequence/fwtm108.jpg"，shell=True)

这会产生错误

# Error: CalledProcessError: Command '['ffmpeg', '-i', 'D:/imagesequence/background222.jpg', '-vf', '"movie= \'D\\:/imagesequence/thumbnail.jpg\'[watermark];[in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]"', 'D:/imagesequence/fwtm107.jpg']' returned non-zero exit status 1 # 

总的来说，它工作得很好。

c = subprocess.check_call(["ffmpeg", "-i", "D:/imagesequence/background222.jpg", "-vf", "movie= 'D\:/imagesequence/thumbnail.jpg'[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]", "D:/imagesequence/fwtm101.jpg"],shell=True)

即使这样也行得通

task = "movie= 'D\:/imagesequence/thumbnail.jpg'[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]"

c = subprocess.check_call(["ffmpeg", "-i", "D:/imagesequence/background222.jpg", "-vf", task, "D:/imagesequence/fwtm102.jpg"],shell=True)

任何不同的视图。我看不到它。

Answer 1

q = "D\:/imagesequence/thumbnail.jpg"
task = "movie= '%s'[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]" % q

c = subprocess.check_call(["ffmpeg", "-i", "D:/imagesequence/background222.jpg", "-vf", task, "D:/imagesequence/fwtm106.jpg"],shell=True)

这起作用了。感谢您

http://comments.gmane.org/gmane.comp.python.tutor/65858