Maya动画如何拍四个屏幕

好酷屋教程网小编为您收集和整理了Maya动画如何拍四个屏幕的相关教程：因为自己用FFmpeg合成视频的时候，费了很大劲，查了大量资料才弄好，希望别人在遇到类似的情况不用绞尽脑汁。思路是：先拍四个视图的屏，然后将这四个视屏合起来并带有声音。里面包含有FFmpeg的

因为自己用FFmpeg合成视频的时候，费了很大劲，查了大量资料才弄好，希望别人在遇到类似的情况不用绞尽脑汁。  

思路是：先拍四个视图的屏，然后将这四个视屏合起来并带有声音。 里面包含有FFmpeg的路径可以自己下载最新版的设置下路径就行了。 详细代码如下：import osimport subprocessimport maya.cmds as cmdsdef split_list_by_chuck(userList, chuck):    for i in xrange(0, len(userList), chuck):        yield userListdef get_timeSlinder_current_sound():    import maya.mel    gplayBackSlider = maya.mel.eval($tmpVar=$gplayBackSlider)    sound = cmds.timeControl(gplayBackSlider, q=1, s=1, ds=1)    if sound:        return sound    return Nonedef compostion_multiple_videos(videos, output_video, start_number, duration, rate, sound=None, column=2):    ffmpeg_path = //storage1.of3d.com/centralizedTools/third_party/exe/ffmpeg/win/3.3.1/bin/ffmpeg.exe    temp_videos = []    videos_num = len(videos)    if column > videos_num:        print >>> The amount of videos must be larger than column        return False    for index, video in enumerate(split_list_by_chuck(videos, column)):        input_videos = []        num = len(video)        for i in xrange(num):            input_videos.append(-i %s % video)        composition_video_temp = os.path.join(os.path.dirname(output_video), temp_%s.mov % index).replace(\\, /)        if os.path.exists(composition_video_temp):            os.remove(composition_video_temp)        all_input =  .join(input_videos)        command_temp = {ffmpeg} {input_videos} -filter_complex ”pad=iw*{column}:ih; overlay=w” {output_video_temp}.format(            ffmpeg=ffmpeg_path, input_videos=all_input, column=column, output_video_temp=composition_video_temp)        print >>> Command: %s % command_temp        state = subprocess.call(command_temp, shell=True)        temp_videos.append(composition_video_temp)    if temp_videos:        input_videos = []        num = len(temp_videos)        for i in xrange(num):            input_videos.append(-i %s % temp_videos)        final_video_temp = os.path.join(os.path.dirname(output_video), %s_temp.mov %                                        os.path.basename(output_video).split(.)).replace(\\, /)        all_input =  .join(input_videos)        command = {ffmpeg} {input_videos_temp} -preset ultrafast -filter_complex vstack {output_video}.format(            ffmpeg=ffmpeg_path, input_videos_temp=all_input, output_video=final_video_temp)        print >>> Command: %s % command        if os.path.exists(final_video_temp):            os.remove(final_video_temp)        state = subprocess.call(command, shell=True)        if sound:            command = {ffmpeg} -t {duration} -i {final_video_temp} -i {audio} -shortest {output_video}.format(                ffmpeg=ffmpeg_path, duration=str(duration), final_video_temp=final_video_temp, audio=sound, output_video=output_video)            print >>> Command: %s % command            if os.path.exists(output_video):                os.remove(output_video)            state = subprocess.call(command, shell=True)            temp_videos.append(final_video_temp)        all_temp_video = set(temp_videos).union(set(videos))        for video in all_temp_video:            if os.path.exists(video):                os.remove(video)        if state == 0:            return True        else:            return Falsedef get_rate():    rate_data = {game: 15, film: 24, pal: 25, ntsc: 30, show: 48, palf: 50, ntscf: 60, 100fps: 100}    current_rate = cmds.currentUnit(q=1, t=1)    rate = rate_data.get(current_rate, 24)    return ratedef playblast_from_multiple_views(videopath, widthHeight, frameRange, videoFormat=Qt, compression=H.264, sound=None):    viewpanels = cmds.getpanel(typ=modelpanel)    visiblepanels = cmds.getpanel(vis=1)    renderpanels = list(set(viewpanels) & set(visiblepanels))    video_paths = []    camera_names = []    sound_file = None    frange_range = frameRange - frameRange + 1    scene_rate = get_rate()    duration = %.03f % (frange_range * 1.0 / scene_rate)    if sound:        sound_file = sound    else:        audio = get_timeSlinder_current_sound()        if audio:            audio_file = cmds.getAttr(%s.filename % audio)            if audio_file.startswith($):                env_variable = os.environ.get(audio_file.split(/, 1).strip($))                sound_file = os.path.join(env_variable, audio_file.split(/, 1)).replace(\\, /)            else:                sound_file = audio_file    print >>>, sound_file    for panel in renderpanels:        cmds.setFocus(panel)        camera_name = cmds.modelEditor(panel, q=1, cam=1)        if camera_name in camera_names:            continue        single_view_video_path = os.path.join(os.path.dirname(videopath), %s.mov % camera_name)  # hardcode        print >>> camera: %s; videopath: %s % (camera_name, single_view_video_path)        cmds.modelEditor(panel, e=1, hud=1, da=smoothShaded, dtx=1, dl=default, alo=0, pm=1, ns=1)        cmds.playblast(startTime=frameRange, endTime=frameRange, fmt=videoFormat, filename=single_view_video_path, forceOverwrite=1,                       sequenceTime=0, clearCache=1, viewer=0, showOrnaments=1, offScreen=1,                       fp=4, percent=100, compression=compression, quality=100, widthHeight=(1280, 720))        print >>> playblast camera: %s % camera_name        camera_names.append(camera_name)        video_paths.append(single_view_video_path)    state = compostion_multiple_videos(video_paths, videopath, frameRange, duration, scene_rate, sound_file)    if state:        print >>> Finish playblasting multiple views     else:        print >>> Something wrong, please check carefully if __name__ == __main__:    video_path = F:/Multiple_View/all.mov    playblast_from_multiple_views(video_path, (1280, 720), , sound=None)稍微解释下：command_temp = {ffmpeg} {input_videos} -filter_complex ”pad=iw*{column}:ih; overlay=w” {output_video_temp}.format(            ffmpeg=ffmpeg_path, input_videos=all_input, column=column, output_video_temp=composition_video_temp)12这句的意思是将多个视频横向合起来，其中column代表几列，如2，就表示两个视频并列，在视频个数已知的情况，那么行数也就可知了。command = {ffmpeg} {input_videos_temp} -preset ultrafast -filter_complex vstack {output_video}.format(            ffmpeg=ffmpeg_path, input_videos_temp=all_input, output_video=final_video_temp)12这句是将视频纵向合起来，有几个合几个。command = {ffmpeg} -t {duration} -i {final_video_temp} -i {audio} -shortest {output_video}.format(                ffmpeg=ffmpeg_path, duration=str(duration), final_video_temp=final_video_temp, audio=sound, output_video=output_video)12这个是最后将音频合最终的总的视频合起来的命令，主要是那个shortest这个参数表示，如果在合得时候，音频比视频长的情况就按视频长度为最终的长度时间。 

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