視頻剪輯什么鬼?Python 帶你高效創(chuàng)作短視頻

def?get_audio_from_video(video_path):
????"""
????從視頻中提取音頻
????:param?video:
????:return:
????"""
????file_path?=?'./source/'?+?gene_random()?+?'.wav'
????video?=?VideoFileClip(video_path)
????audio?=?video.audio
????audio.write_audiofile(file_path)
????return?file_path

def?handle_bgm(bgm_path,?coefficient):
????music?=?AudioFileClip(bgm_path)

???#?音量調(diào)整為原來音量的倍數(shù)
???out_music?=?music.fx(afx.volumex,?coefficient).fx(afx.audio_fadein,?0.5).fx(
????????afx.audio_fadeout,?1)

???#?保存背景音樂
???out_music.write_audiofile('./source/output.wav')

• 使用 AU 做變調(diào)處理

• 修改調(diào)用百度云 API

• 使用?librosa?依賴庫。

import?librosa

source?=?"./source/source.wav"

#?加載背景音樂
y,?sr?=?librosa.load(source)

#?修改
librosa.effects.pitch_shift(y,?sr,?n_steps=6)
y?=?shrinkstep(10,?y,?sr)

#?生成新的背景音樂文件
outputpath?=?"./source/result.wav"
librosa.output.write_wav(outputpath,?y,?sr)

• 分離 2 段視頻的視頻 Clip、音頻 Clip

• 統(tǒng)一視頻的分辨率

• 分別對(duì)視頻的開頭和結(jié)尾加入轉(zhuǎn)場(chǎng)效果，比如淡入淡出效果

• 合并 2 段視頻

• 合并 2 段音頻

• 設(shè)置音頻文件

• 保存視頻文件

  
  

def?transitions_animation(path_video1,?path_video2):
????"""
????兩段視頻中轉(zhuǎn)場(chǎng)動(dòng)畫（以淡入淡出為例）
????注意：保證視頻拍攝幀率一致
????:param?video1:
????:param?video2:
????:return:
????"""
????#?獲取視頻時(shí)長(zhǎng)
????clip_video1?=?VideoFileClip(path_video1)
????duration_video1?=?clip_video1.duration

????#?獲取視頻音頻
????path_audio1?=?get_audio_from_video(path_video1)
????path_audio2?=?get_audio_from_video(path_video2)

????audio_video1?=?AudioFileClip(path_audio1)
????audio_video2?=?AudioFileClip(path_audio2)

????clip_video2?=?VideoFileClip(path_video2)
????duration_video2?=?clip_video2.duration

????print(f'兩段視頻的時(shí)長(zhǎng)分別為:{duration_video1},{duration_video2}')

????#?統(tǒng)一視頻分辨率
????w,?h,?fps?=?clip_video1.w,?clip_video1.h,?clip_video1.fps
????clip_video2_new?=?clip_video2.resize((w,?h))

????#?轉(zhuǎn)場(chǎng)時(shí)長(zhǎng)，默認(rèn)2s
????transitions_time?=?2

????#?第一段視頻執(zhí)行淡出效果
????subVideo1_part1?=?clip_video1.subclip(0,?duration_video1?-?2)
????subVideo1_part2?=?clip_video1.subclip(duration_video1?-?2).fadeout(2,?(1,?1,?1))

????#?第二段視頻執(zhí)行淡入效果
????subVideo2_part1?=?clip_video2_new.subclip(0,?3).fadein(3,?(1,?1,?1))
????subVideo2_part2?=?clip_video2_new.subclip(3)

????#?合并4段視頻
????result_video?=?concatenate_videoclips([subVideo1_part1,?subVideo1_part2,?subVideo2_part1,?subVideo2_part2])

????#?合并音頻
????result_audio?=?concatenate_audioclips([audio_video1,?audio_video2])

????#?視頻設(shè)置音頻文件
????final_clip?=?result_video.set_audio(result_audio)

????# pass 寫入視頻文件

def?change_video_speed(video_path,?speed,?start,?end):
????"""
????改變視頻的速度
????[MoviePy?clip相關(guān)的重要api](https://juejin.im/post/5d1c4318f265da1ba9159912)
????:param?video_path:視頻路徑
????:param?speed:速度
????:param?start:開始時(shí)間
????:param?end:結(jié)束時(shí)間
????:return:
????"""
????video?=?VideoFileClip(video_path)

????#?速度變換
????part1?=?video.fl_time(lambda?t:?speed?*?t,?apply_to=['mask',?'video',?'audio']).set_start(start).set_end(
????????end?/?speed)

????#?余下時(shí)長(zhǎng)恢復(fù)速度
????part2?=?video.subclip(end)

????#?合成視頻
????result_video?=?concatenate_videoclips([part1,?part2])

????result_path?=?'./source/result.mp4'
????result_video.write_videofile(result_path)

def?ghost_video(video_path,?repeat_time,?location):
????"""
????生成鬼畜視頻
????:param?video_path:?視頻路徑
????:param?repeat_time:?重復(fù)次數(shù)
????:param?location:?處理位置
????:return:
????"""
????video?=?VideoFileClip(video_path)

????#?視頻前部分
????part1?=?video.subclip(0,?location)

????#?視頻目標(biāo)部分，進(jìn)行重復(fù)操作
????target?=?video.subclip(location,?location?+?1)

????#?視頻后部分
????part2?=?video.subclip(location?+?repeat_time)

????targets?=?[]

????#?分別加入?3?個(gè)部分
????targets.append(part1)

????for?_?in?range(repeat_time):
????????targets.append(target)

????targets.append(part2)

????#?合成、生成視頻
????pass

#?加入圖片水印
#?包含：水印的時(shí)長(zhǎng)、位置、透明度等
logo?=?(ImageClip("./source/logo.png")
????????????.set_duration(video.duration)??
????????????.resize(height=50)??
????????????.margin(right=8,?top=8,?opacity=1)??
????????????.set_pos(("right",?"top")))?

final?=?CompositeVideoClip([video,?logo])

#?加入文字字幕
clip?=?VideoFileClip(video_path)

#?字幕，文字內(nèi)容、位置、展示時(shí)長(zhǎng)
texpClip?=?TextClip(subtitle,?fontsize=30,?color='white').set_pos('bottom').set_duration(duration)

video?=?CompositeVideoClip([clip,texpClip.set_start(start)])

#?快速轉(zhuǎn)碼壓縮
alias?zh='ffmpeg?-i?source.mov?-qscale?0?output.mp4'

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