Recherche avancée

Sur d’autres sites (8508)

• Combining Audio and Video file in python [duplicate]

  8 juin 2020, par yso

  I'm trying to understand how to us ffmpeg to combine video and audio files in python. I want to combine a .avi file and a .wav file to create a final .avi file. Is this the right approach ? I'm confused by the ffmpeg syntax.
Any help would be great.

  



  I was looking through this for help :
https://wiki.libav.org/Snippets/avconv#Combine_audio_and_video_file

  



  import ffmpeg
import subprocess

cmd = 'ffmpeg -i inputvideo.avi -i inputaudio.wav -c:v copy -c:a aac output_video_and audio.avi'
subprocess.call(cmd, shell=True)                                     # "Muxing Done
print('Muxing Done')


  


• ffmpeg compilation Error

  14 juillet 2016, par sivamnatesan3

  I have been trying to compile ffmpeg on my raspberry-pi, but it gives me a lot of warnings like (codec is deprecated) especially while run sudo make.

   pi@raspberrypi:/usr/src/ffmpeg $ sudo make && sudo make install
  
  
  
  ....... lots of successful execution here ...... 
  
  
  
  
  
  CC  libavfilter/avf_showfreqs.o
  
  libavfilter/lavfutils.c: In function ‘ff_load_image’:
  
  libavfilter/lavfutils.c:53:5: warning: ‘codec’ is deprecated (declared at    ./libavformat/avformat.h:880) [-Wdeprecated-declarations]
  
   codec_ctx = format_ctx->streams[0]->codec;
  
   ^
  
  libavfilter/lavfutils.c:79:5: warning: ‘avcodec_decode_video2’ is deprecated   (declared at ./libavcodec/avcodec.h:4763) [-Wdeprecated-declarations]
  
   ret = avcodec_decode_video2(codec_ctx, frame, &frame_decoded, &pkt);
  
   ^
  
  CC  libavfilter/lswsutils.o
  
  CC  libavfilter/opencl_allkernels.o
  
  CC  libavfilter/pthread.o
  
  CC  libavfilter/setpts.o
  
  CC  libavfilter/settb.o
  
  CC  libavfilter/split.o
  
  CC  libavfilter/src_movie.o
  
  libavfilter/src_movie.c: In function ‘movie_push_frame’:
  
  libavfilter/src_movie.c:524:9: warning: ‘avcodec_decode_video2’ is deprecated (declared at ./libavcodec/avcodec.h:4763) [-Wdeprecated-declarations]
  
       ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
  
       ^
  
  libavfilter/src_movie.c:527:9: warning: ‘avcodec_decode_audio4’ is deprecated (declared at ./libavcodec/avcodec.h:4714) [-Wdeprecated-declarations]
  
       ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
  
       ^
  
  CC  libavfilter/transform.o
  
  CC  libavfilter/trim.o
  
  CC  libavfilter/vaf_spectrumsynth.o
  
  libavfilter/vaf_spectrumsynth.c: In function ‘try_push_frame’:
  
  libavfilter/vaf_spectrumsynth.c:370:19: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
  
   int ch, n, i, ret;                 ^
  
  CC  libavfilter/vf_alphamerge.o
  
  CC  libavfilter/vf_aspect.o
  
  CC  libavfilter/vf_atadenoise.o
  
  CC  libavfilter/vf_colorlevels.o
  
  CC  libavfilter/vf_colorspace.o
  
  libavfilter/vf_colorspace.c: In function ‘fill_rgb2xyz_table’:
  
  libavfilter/vf_colorspace.c:360:22: warning: passing argument 1 of ‘invert_matrix3x3’ from incompatible pointer type
  
   invert_matrix3x3(rgb2xyz, i);
  
                    ^
  
  libavfilter/vf_colorspace.c:277:13: note: expected ‘const double (*)[3]’ but argument is of type ‘double (*)[3]’
  
   static void invert_matrix3x3(const double in[3][3], double out[3][3])
  
           ^
  
  libavfilter/vf_colorspace.c: In function ‘fill_whitepoint_conv_table’:
  
  libavfilter/vf_colorspace.c:424:21: warning: passing argument 3 of ‘mul3x3’   from incompatible pointer type
  
   mul3x3(tmp, ma, fac);
  
  libavfilter/vf_colorspace.c:376:13: note: expected ‘const double (*)[3]’ but argument is of type ‘double (*)[3]’
  
  static void mul3x3(double dst[3][3], const double src1[3][3], const double src2[3][3])
  
           ^
  
  libavfilter/vf_colorspace.c:425:17: warning: passing argument 2 of ‘mul3x3’ from incompatible pointer type
  
   mul3x3(out, tmp, mai);
  
               ^
  
  libavfilter/vf_colorspace.c:376:13: note: expected ‘const double (*)[3]’ but argument is of type ‘double (*)[3]’
  
  static void mul3x3(double dst[3][3], const double src1[3][3], const double src2[3][3])
  
           ^
  
  libavfilter/vf_colorspace.c:425:22: warning: passing argument 3 of ‘mul3x3’ from incompatible pointer type
  
   mul3x3(out, tmp, mai);
  
                    ^
  
  libavfilter/vf_colorspace.c:376:13: note: expected ‘const double (*)[3]’ but argument is of type ‘double (*)[3]’
  
  static void mul3x3(double dst[3][3], const double src1[3][3], const double src2[3][3])
  
           ^
  
  libavfilter/vf_colorspace.c: In function ‘convert’:
  
  libavfilter/vf_colorspace.c:480:20: warning: passing argument 7 of ‘s->yuv2yuv’ from incompatible pointer type
  
                  s->yuv2yuv_coeffs, s->yuv_offset);
  
                  ^
  
  libavfilter/vf_colorspace.c:480:20: note: expected ‘const int16_t (*)[3][8]’ but argument is of type ‘int16_t (*)[3][8]’
  
  libavfilter/vf_colorspace.c:480:39: warning: passing argument 8 of ‘s->yuv2yuv’ from incompatible pointer type
  
                  s->yuv2yuv_coeffs, s->yuv_offset);
  
                                     ^
  
  libavfilter/vf_colorspace.c:480:39: note: expected ‘const int16_t (*)[8]’ but argument is of type ‘int16_t (*)[8]’
  
  libavfilter/vf_colorspace.c:502:20: warning: passing argument 7 of ‘s->yuv2rgb’ from incompatible pointer type
  
                  s->yuv2rgb_coeffs, s->yuv_offset[0]);
  
                  ^
  
  libavfilter/vf_colorspace.c:502:20: note: expected ‘const int16_t (*)[3][8]’ but argument is of type ‘int16_t (*)[3][8]’
  
  libavfilter/vf_colorspace.c:506:62: warning: passing argument 5 of ‘s->dsp.multiply3x3’ from incompatible pointer type
  
               s->dsp.multiply3x3(rgb, s->rgb_stride, w, h, s->lrgb2lrgb_coeffs);
  
                                                            ^
  
  libavfilter/vf_colorspace.c:506:62: note: expected ‘const int16_t (*)[3][8]’ but argument is of type ‘int16_t (*)[3][8]’
  
  libavfilter/vf_colorspace.c:511:28: warning: passing argument 7 of ‘s->rgb2yuv_fsb’ from incompatible pointer type
  
                          s->rgb2yuv_coeffs, s->yuv_offset[1], s->dither_scratch);
  
                          ^
  
  libavfilter/vf_colorspace.c:511:28: note: expected ‘const int16_t (*)[3][8]’ but argument is of type ‘int16_t (*)[3][8]’
  
  libavfilter/vf_colorspace.c:514:24: warning: passing argument 7 of ‘s->rgb2yuv’ from incompatible pointer type
  
                      s->rgb2yuv_coeffs, s->yuv_offset[1]);
  
                      ^
  
  libavfilter/vf_colorspace.c:514:24: note: expected ‘const int16_t (*)[3][8]’ but argument is of type ‘int16_t (*)[3][8]’
  
  libavfilter/vf_colorspace.c: In function ‘create_filtergraph’:
  
  libavfilter/vf_colorspace.c:614:30: warning: passing argument 1 of ‘invert_matrix3x3’ from incompatible pointer type
  
  
  
                   ^

  and it still continues....

  How to solve it ? what might be the problem for this warnings ?

• error - lottie to mp4 using puppeteer-lottie

  24 mars 2020, par Christian Lopez

  I have installed puppeteer-lottie and ffmpeg, but when I trying to use the await renderLottie function I got an error on the terminal "UnhandledPromiseRejectionWarning : ArgumentError : Expected number fps to be positive, got 0"

  here is how I use puppeteer :

  app.get("/video", (req, res) => {
  
  
  
    async function start() {
  
      await renderLottie({
  
          path: 'public/newData.json',
  
          output: 'public/example.mp4',
  
          height: 1920
  
        });
  
      }
  
    start();
  
  
  
    res.send("donwload your video");
  
  });

  this is the error :

  (node:3464) UnhandledPromiseRejectionWarning: ArgumentError: Expected number `fps` to be positive, got 0

  any suggestions ?