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Collections - Formulaire de création rapide
19 février 2013, par
Mis à jour : Février 2013
Langue : français
Type : Image
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Ffmpeg merge videos from images with videos and audio cut
30 mars 2021, par Trofingot a question about fluent ffmpeg, i'm quite new to it so need some help.


I'm trying to get images and videos from S3 so i can make a full video from them.
So i'm making videos with .loop with certain video length from images.
Then i'm adding a normal video with it's audio.
Then i'm cutting audio length so the audio that was added will play only on the videos made from images.
When the video which was merged with the videos from images will come to play it will have his own audio.
The thing is that if i merge all videos i get this error :

An error occurred while merging video files: ffmpeg exited with code 1: Cannot find a matching stream for unlabeled input pad 7 on filter Parsed_concat_0.

So i need to add an audio to the video which was not made from images so that the stream could work. How can i avoid this and let that video have it's own audio ? what inputOptions should i add ? Also when i cut the audio it has a delay, what audioFilters can i add ?


``


const videosFromImages = [];
 VIDEO_CONFIG.fragments.forEach((fragment) => {
 videosFromImages.push(function (callback) {
 let ffmpegInstance = ffmpeg(
 `./images/images-with-same-size/${fragment.filename}`
 );

 if (fragment.duration && fragment.type === "image") {
 ffmpegInstance.loop(fragment?.duration);
 }

 if (fragment.type === "image") {
 ffmpegInstance
 .addInput("./audio/audio.mp3")
 .inputOptions(
 "-ss",
 time,
 "-to",
 time + fragment.duration,
 "-async",
 "1"
 );

 time = time + fragment.duration;
 console.log("time:", time);
 }

 ffmpegInstance
 .videoCodec("libx264") // Codec from api
 .videoBitrate("12000k") // Video Quality
 .videoFilters([
 {
 filter: "fade",
 options: "in:0:15",
 },
 ]) // Transitions
 .on("error", function (err) {
 console.error("An error occurred: " + err.message);
 })
 .on("end", function () {
 res.write(`<p>Processing finished for ${fragment.filename}</p>`);
 fragment.filePath = `./output/project-${VIDEO_CONFIG.projectId}/videos/video-${fragment.filename}.avi`;

 callback(null, fragment);
 })
 .save(
 `./output/project-${VIDEO_CONFIG.projectId}/videos/video-${fragment.filename}.avi`
 );
 });
 });

 async.series(videosFromImages, function (err, videosFromImages) {
 // result now equals 'done'
 async.waterfall(
 [
 (done) => {
 console.log("VIDEO_CONFIG", VIDEO_CONFIG.fragments);

 VIDEO_CONFIG.fragments
 .reduce((prev, curr) => prev.input(curr.filePath), ffmpeg())
 .outputFPS(60)
 .on("error", (err) => {
 res.end();
 console.log(
 `An error occurred while merging video files: ${err.message}`
 );
 })
 .on("end", () => {
 res.write("FINAL VIDEO END");
 res.end();
 console.log("end:");
 })
 .mergeToFile(
 `./output/project-${VIDEO_CONFIG.projectId}/final-video-${VIDEO_CONFIG.projectId}.mp4`
 );
 done(null);
 },
 ],
 (err) => {
 if (err) {
 console.log("err:", err);
 }
 }
 );
 });

 res.write("<p>Processing</p>");
} catch (error) {
 console.error("error:", error);
}


``


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