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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
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Sur d’autres sites (10712)
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HOW TO APPLY TRANSITION EFFECTS IN FFMPEG ? [closed]
8 janvier 2023, par SMARTI have 7 videos with audio, i tried to apply transition effects on these files, written code in python for this , i got error .


python code :
import subprocess as sp


def runffmpeg(cmd):
 try:
 pipe = sp.Popen(cmd, stdout=sp.PIPE, stderr=sp.STDOUT,
 universal_newlines=True)
 
 ffmpeg_output, _ = pipe.communicate()
 
 print(ffmpeg_output)
 return (ffmpeg_output)
 
 except sp.CalledProcessError as err:
 print("FFmpeg stdout output on error:\n" + err.output)
 
 def get_duration(fn):
 cmd = (
 f"ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 {fn}")
 
 cmd1 = (
 f"ffprobe -v error -of flat=s_ -select_streams 1 -show_entries stream=duration -of default=noprint_wrappers=1:nokey=1 {fn}")
 try:
 pipe = sp.Popen(cmd, stdout=sp.PIPE, stderr=sp.STDOUT,
 universal_newlines=True)
 
 viddur, _ = pipe.communicate()
 
 print(viddur)
 
 pipe = sp.Popen(cmd1, stdout=sp.PIPE, stderr=sp.STDOUT,
 universal_newlines=True)
 
 auddur, _ = pipe.communicate()
 
 try:
 auddur = float(auddur.strip())
 except:
 auddur = 0
 
 print(auddur)
 
 # if (len(auddur) == 0):
 # auddur = 0
 
 return float(viddur.strip()), (auddur)
 
 except sp.CalledProcessError as err:
 print("FFmpeg stdout output on error:\n" + err.output)
 
 
 def trans(clips, effects, out="trans.mp4"):
 filtc = " [v1][v2]xfade=wipedown:duration=1:offset=4[x1];"
 i = 0
 fcv = ""
 fca = ""
 d1 = 0
 af = ""
 dur = []
 aud = []
 inp = ""
 j = 0
 print(len(clips))
 
 for x in clips:
 print(x[0])
 inp = (inp + " -i " + x)
 
 print(effects[0])
 print(x)
 
 v, a = get_duration(fn=x)
 dur.append(v)
 
 k = 0
 for x in dur:
 
 if (k == 0):
 fca = (fca + f"[{k}:a]adelay=0|0 [a{k+1}];")
 else:
 fca = (fca + f"[{k}:a]adelay={d1}|{d1} [a{k+1}];")
 aud.append(f"[a{k+1}]")
 k = (k+1)
 d1 = (d1+((x*1000)+3.5))
 
 d1 = 0
 for x in efects:
 for v in range(0, j+1, +1):
 d1 = (d1 + dur[v])
 d1 = (d1-((v+1)*3.5))
 # [0:a]adelay=0|0 [a1];
 if (i > 1):
 
 try:
 fcv = (
 fcv+f"[x{(i)}][{(i)}:v]xfade={x}:duration=3:offset={d1} [x{(i+1)}];")
 except:
 pass
 else:
 print("j = %d" % j)
 fcv = (
 fcv+f"[{(i)}:v][{(i+1)}:v]xfade={x}:duration=3:offset={d1} [x{(i+1)}];")
 
 j = (j+1)
 i = (i+1)
 
 for a in aud:
 af = (af+a)
 af = (af+f"amix=inputs={len(aud)} [faud]")
 
 inp = (inp+" -filter_complex \"")
 cmd = (
 f"ffmpeg {inp} {fcv} {fca} {af} \" -pix_fmt yuv420p -map \"[x{i}]\" -map \"[faud]\" -y {out}")
 
 print(cmd)
 
 try:
 pipe = sp.Popen(cmd, stdout=sp.PIPE, stderr=sp.STDOUT,
 universal_newlines=True)
 
 ffmpeg_output, _ = pipe.communicate()
 
 print(ffmpeg_output)
 
 except sp.CalledProcessError as err:
 print("FFmpeg stdout output on error:\n" + err.output)
 
 



these functions creates ffmpeg code like :
ffmpeg -i out1.mp4 -i out2.mp4 -i out3.mp4 -i out4.mp4 -i out5.mp4 -i out6.mp4 -i out7.mp4 -filter_complex " [0:v][1:v]xfade=wipedown:duration=3:offset=6.006009000000001 [x1] ;[1:v][2:v]xfade=dissolve:duration=3:offset=14.030023 [x2] ;[x2][2:v]xfade=pixelize:duration=3:offset=20.572042000000003 [x3] ;[x3][3:v]xfade=vuslice:duration=3:offset=21.621068000000008 [x4] ;[x4][4:v]xfade=radial:duration=3:offset=14.188099000000015 [x5] ;[x5][5:v]xfade=vertopen:duration=3:offset=-5.737862999999978 [x6] ; [0:a]adelay=0|0 [a1] ;[1:a]adelay=9509.509|9509.509 [a2] ;[2:a]adelay=18531.014000000003|18531.014000000003 [a3] ;[3:a]adelay=27552.519000000004|27552.519000000004 [a4] ;[4:a]adelay=36063.026000000005|36063.026000000005 [a5] ;[5:a]adelay=45084.531|45084.531 [a6] ;[6:a]adelay=53595.038|53595.038 [a7] ; [a1][a2][a3][a4][a5][a6][a7]amix=inputs=7 [faud] " -pix_fmt yuv420p -map "[x6]" -map "[faud]" -y trans.mp4


this ffmpeg command generates error :


ffmpeg version 2022-12-25-git-eeb280f351-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
 built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 57. 43.100 / 57. 43.100
 libavcodec 59. 55.103 / 59. 55.103
 libavformat 59. 34.102 / 59. 34.102
 libavdevice 59. 8.101 / 59. 8.101
 libavfilter 8. 53.100 / 8. 53.100
 libswscale 6. 8.112 / 6. 8.112
 libswresample 4. 9.100 / 4. 9.100
 libpostproc 56. 7.100 / 56. 7.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out1.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:09.51, start: 0.000000, bitrate: 1358 kb/s
 Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 1303 kb/s, 26.94 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 51 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'out2.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:09.02, start: 0.000000, bitrate: 1060 kb/s
 Stream #1:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 1007 kb/s, 26.73 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #1:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 47 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'out3.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:09.02, start: 0.000000, bitrate: 1228 kb/s
 Stream #2:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 1178 kb/s, 26.73 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #2:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 46 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'out4.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:08.51, start: 0.000000, bitrate: 987 kb/s
 Stream #3:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 938 kb/s, 26.57 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #3:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 43 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Input #4, mov,mp4,m4a,3gp,3g2,mj2, from 'out5.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:09.02, start: 0.000000, bitrate: 1221 kb/s
 Stream #4:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 1170 kb/s, 26.73 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #4:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 47 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Input #5, mov,mp4,m4a,3gp,3g2,mj2, from 'out6.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:08.51, start: 0.000000, bitrate: 1073 kb/s
 Stream #5:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 1027 kb/s, 26.57 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #5:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 41 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Input #6, mov,mp4,m4a,3gp,3g2,mj2, from 'out7.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.34.102
 Duration: 00:00:09.02, start: 0.000000, bitrate: 757 kb/s
 Stream #6:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/unknown/unknown, progressive), 1080x1920, 705 kb/s, 26.73 fps, 25 tbr, 1000k tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.55.103 libx264
 Stream #6:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 46 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Filter xfade:default has an unconnected output



Filter xfade:default has an unconnected output , what does it mean ?


in adelay area , getting -ve nos , what to do ?


#useage :


vc = ["C1.mp4", "C2.mp4", "C3.mp4", "C4.mp4", "C5.mp4", "C6.mp4", "C7.mp4"]


i = 1
 gc = []
 for x in vc:
 gc.append(f"out{i}.mp4")
 i = (i+1)
 
 print(gc)
 
 trans(clips=gc, effects=efects)



system details :
windows 10 64 bits
python 3.9 64 bits


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