如何使用avconv和python将两个不同帧速率的不同图像序列组合到视频中？

Question

我有两组图像，分别与avconv组合使用时没有问题（使用-r使用不同的速率），一组设置为-r .20（将一幅图像扩展到五秒钟的视频），另一组设置为常规帧速率为定期整理视频。

当我尝试将这些单独的avi文件与avconv或avimerge合并时，所得视频仅具有第一个视频的帧速率（-r .20）

有没有一种方法可以将这两个序列组合在一起，并且两个序列都以它们导出时的帧速率为准？

这是我在这里放在一起的草率代码：

try:

p = subprocess.Popen(["avconv" , "-y" ,  "-r" , ".20" , "-i" , "head%03d.jpg" , "-i" , audio , head_video_filename],  universal_newlines=True, stdout=subprocess.PIPE)      
    out, err = p.communicate()
    retcode = p.wait()
except IOError:
    pass
else:
    print "] ENCODING OF HEADER.AVI FINISHED:" + str(retcode)

try:
    p = subprocess.Popen(["avconv" , "-y"  , "-i" , "tail%03d.jpg" , "-r" , "25" , tail_video_filename],  universal_newlines=True, stdout=subprocess.PIPE)      
    out, err = p.communicate()
    retcode = p.wait()
except IOError:
    pass
else:
    print "] ENCODING OF TAIL.AVI FINISHED:" + str(retcode)
try:

    group_of_videos = "concat:"+head_video_filename+"|"+tail_video_filename
    p = subprocess.Popen(["avconv" , "-i" , group_of_videos , "-c" , "copy" , full_video_filename] ,  universal_newlines=True, stdout=subprocess.PIPE)      
    out, err = p.communicate()
    retcode = p.wait()
except IOError:
    pass
else:
    print "] ENCODING OF FULL_VIDEO.AVI FINISHED:" + str(retcode)


return

＃

Answer 1

我大概知道了。 这些是我采取的步骤，虽然时间更长，但它或多或少为我提供了来自不同来源的两个视频，分别为图像和帧频，可以将它们编码在一起并为结束视频添加单独的音乐曲目。 它确实运作良好，但仍然需要调整帧速率（30、29.X等以使其正确）

编码以.2输入的第一个视频序列并以30FPS导出

try:
    p = subprocess.Popen(["mencoder"  , "-forceidx" , "-ovc" , "copy" , "-o" , combined_video_filename , first_video_filename , second_video_filename] ,  universal_newlines=True, stdout=subprocess.PIPE)      
    out, err = p.communicate()
    retcode = p.wait()
except IOError:
    "* FAILED TO MAKE COMBINED VIDEO"
    pass
else:
    print "] ENCODING OF COMBINED VIDEO FINISHED:" + str(retcode)

以29.7FPS编码输入的第二个视频序列，并以30FPS导出

 try: p = subprocess.Popen(["avconv" , "-stats" , "0" , "-y" , "-i" , "second%03d.jpg" , "-crf" , "1" , "-b" , "65536k" , "-s" , "1280x720" , "-r" , "30" , second_video_filename], universal_newlines=True, stdout=subprocess.PIPE) out, err = p.communicate() retcode = p.wait() except IOError: pass else: print "] ENCODING OF SECOND VIDEO FINISHED: " + str(retcode) 

结合AVI

 try: p = subprocess.Popen(["mencoder" , "-forceidx" , "-ovc" , "copy" , "-o" , combined_video_filename , first_video_filename , second_video_filename] , universal_newlines=True, stdout=subprocess.PIPE) out, err = p.communicate() retcode = p.wait() except IOError: "* FAILED TO MAKE COMBINED VIDEO" pass else: print "] ENCODING OF COMBINED VIDEO FINISHED:" + str(retcode) 

＃添加音频混音轨道

 try: p = subprocess.Popen(["avconv" , "-stats" , "0" , "-y" , "-i" , combined_video_filename , "-i" , combined_audio , "-c" , "copy" , "-crf" , "1" , "-b" , "65536k" ,"-shortest" , final_video_filename] , universal_newlines=True, stdout=subprocess.PIPE) out, err = p.communicate() retcode = p.wait() except IOError: "* FAILED TO MAKE FINAL VIDEO" pass else: print "] ENCODING OF FINAL VIDEO FINISHED: " + str(retcode) 

火腿拳头，但希望这有一天可以帮助某人