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• FFmpeg seems to be version conflict

  4 novembre 2014, par user3177342

  I am using git version of ffmpeg( renewed after old version succesful using) , when i try to compile my project i get

   /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_subpacket':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:376: undefined reference to `swr_is_initialized'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_frame':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:222: undefined reference to `swr_is_initialized'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_init_resample':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:163: undefined reference to `swr_init'
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:169: undefined reference to `swr_convert'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_frame':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:236: undefined reference to `swr_convert'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_flush_resample':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:117: undefined reference to `swr_convert'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_subpacket':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:408: undefined reference to `swr_close'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_flush':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:557: undefined reference to `swr_close'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_close':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:579: undefined reference to `swr_free'
  
  /usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_init':
  
  /home/user/projects/ffmpleglast/ffmpeg/libavcodec/opusdec.c:629: undefined reference to `swr_alloc'

  Seems to be version conflict ? but how to delete wrong libs ? they seem to be todays build.

  ls -l /usr/local/lib
  
  -rw-r--r-- 1 root root  136509684 may   29 14:47 libavcodec.a
  
  -rw-r--r-- 1 root root    1853574 may   29 14:47 libavdevice.a
  
  -rw-r--r-- 1 root root    9689456 may   29 14:47 libavfilter.a
  
  -rw-r--r-- 1 root root   46282270 may   29 14:47 libavformat.a
  
  -rw-r--r-- 1 root root    2092250 may   29 14:47 libavutil.a
  
  -rw-r--r-- 1 root root      67942 may   12 11:29 libBasicUsageEnvironment.a
  
  -rw-r--r-- 1 root root    2200164 apr.  10 10:11 libfftw3.a
  
  -rwxr-xr-x 1 root root        872 apr.  10 10:11 libfftw3.la
  
  -rw-r--r-- 1 root root      94188 may   12 11:29 libgroupsock.a
  
  -rw-r--r-- 1 root root    2236084 may   12 11:29 libliveMedia.a
  
  -rw-r--r-- 1 root root     546506 may   29 14:47 libswresample.a
  
  -rw-r--r-- 1 root root    4813716 may   29 14:47 libswscale.a
  
  -rw-r--r-- 1 root root      14588 may   12 11:29 libUsageEnvironment.a

• FFmpeg error with ffmpeg.FS("readfile", "output.mp4"). trying to get ffmpeg to work in the react app

  21 juin 2024, par Paul Tham

   const stackVideos = useCallback(
    async (video1) => {
      try {
        console.log("Fetching video2 from storage...");
        const video2Ref = ref(storage, "video2.mp4");
        const video2Url = await getDownloadURL(video2Ref);
        const video2Blob = await (await fetch(video2Url)).blob();

        console.log("Writing video1 to FFmpeg FS...");
        await ffmpeg.FS("writeFile", "video1.mp4", await fetchFile(video1));

        console.log("Writing video2 to FFmpeg FS...");
        await ffmpeg.FS("writeFile", "video2.mp4", await fetchFile(video2Blob));

        console.log("Files in FFmpeg FS after write:");
        const files = await ffmpeg.FS("readdir", "/");
        console.log(files);

        const { start, end } = inputs[0];
        const startSeconds = new Date(`1970-01-01T${start}Z`).getTime() / 1000;
        const endSeconds = new Date(`1970-01-01T${end}Z`).getTime() / 1000;
        const duration = endSeconds - startSeconds;

        console.log("Running FFmpeg command...");
        await ffmpeg.run(
          "-i",
          "video1.mp4",
          "-ss",
          startSeconds.toString(),
          "-t",
          duration.toString(),
          "-i",
          "video2.mp4",
          "-filter_complex",
          "[0:v]scale=1080:-1[v1];[1:v]scale=-1:1920/2[v2scaled];[v2scaled]crop=1080:1920/2[v2cropped];[v1][v2cropped]vstack=inputs=2,scale=1080:1920[vid]",
          "-map",
          "[vid]",
          "-map",
          "0:a",
          "-c:v",
          "libx264",
          "-crf",
          "23",
          "-preset",
          "veryfast",
          "-shortest",
          "output1.mp4"
        );

        console.log("Files in FFmpeg FS after run:");
        const filesAfterRun = await ffmpeg.FS("readdir", "/");
        console.log(filesAfterRun);

        console.log("Reading output1.mp4 from FFmpeg FS...");
        const data = await ffmpeg.FS("readfile", "output1.mp4");
        console.log("after the FS readfile");
        const url = URL.createObjectURL(
          new Blob([data.buffer], { type: "video/mp4" })
        );
        setStackedVideo(url);
        setOutputFileReady(true); // Mark output file as ready
      } catch (err) {
        console.error("FFmpeg error output:", err);
        setError(`FFmpeg run error: ${err.message}`);
        setIsProcessing(false);
      }
    },
    [inputs]
  );


  


  My error seems to be stemming from this line :

  


   const data = await ffmpeg.FS("readfile", "output1.mp4");


  


  Seeing the ffmpeg.wasm documentation i thought the functions for some of the functions had changed, but when I changed it, it seemed like they did not recognise the new functions. Sometimes this will also give me some other errors like worker.js which I dont understand enough to debug this myself.

  


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• Extracting Frames form Video in Android [closed]

  2 juillet 2024, par Muhammad Bilal

  I want to extract frames from video and want to change the frames at that point where i extracted the frames.

  


  I have scene apps like Video Status Maker(https://play.google.com/store/apps/details?id=com.krishna.videostatusmaker), Vidify (https://play.google.com/store/apps/details?id=com.beautifullyrical.videomaker). These apps are using template videos. In my view there is a json file behind the video which exactly tells where the frames should be replaced in the video. I checked out the FFmpeg. It is giving me the frames but as i said there must be file which tells where the frames should be replaced. If anyone Knows how this can be done then please guide me. Thanks