Watermark, concatenate, fade-in, get fps... all in one... but how?

[mlhyyl]

Hi,

I'm experimenting on adapting an ffmpeg commmand to node-fluent-ffmpeg. What my command does is

• creating a 15 seconds long disclaimer from a jpg, which is going to be added to a lecture video.
• trimming the lecture video at the beginning and end
• adding a watermark to the upper left corner
• adding a one-second fade-in at the beginning
• adding a one-second fade-out at the end
• concatenating both videos

Unfortunately, I was only able to achieve the trimming part or the add logo part but not both the same time. I also wasn't able to retrieve the fps of the lecture video which would be determining the fps of the disclaimer video.

So here goes my code:

ffmpeg -i HIST-192-WEEK-6.mp4 -i logo.png -i disclaimer.jpg -f lavfi -t 1 -i anullsrc -filter_complex "[2:v]fps=fps=30,loop=loop=450:size=30:start=0[v2];[v2]fade=t=in:st=0:d=1,fade=t=out:st=14:d=1[vv2];[0:v]trim=start=1:end=5771,setpts=PTS-STARTPTS,scale=1920:1080[v0];[0:a]atrim=start=1:end=5771,asetpts=PTS-STARTPTS[a0];[v0][1:v]overlay=0:0[vv0];[vv0]fade=t=in:st=0:d=1,fade=t=out:st=5769:d=1[vvv0];[a0]afade=t=in:st=0:d=1,afade=t=out:st=5769:d=1[aa0];[vv2][3:a][vvv0][aa0]concat=n=2:v=1:a=1[vv][aa]" -map [vv] -map [aa] -c:a aac -vcodec libx264 -s 1920x1080 output.HIST-192-WEEK-6.mp4

I hope I'm not asking too much.

Thanks anyway.

[mlhyyl]

I made some progress. Except for the first and last steps, I managed to do the rest.

In order to obtain the frame rate, I had to run ffmpeg within ffprobe.

What is missing is the part where I add an empty audio track. I wasn't able to fit "-f lavfi -t 1 -i anullsrc" into the code.

Any help/advice appreciated.

Here goes my code:

ffmpeg.ffprobe("HIST-192-WEEK-6.mp4", function (err, metadata) {
        frameRateFPSRaw = metadata.streams[0].r_frame_rate;
        frameRateFPS = frameRateFPSRaw.split("/");
        fpsValue = frameRateFPS[0] / frameRateFPS[1];
        let fadeOutFrame = Math.round(fadeOutTime * frameRateFPS[0] / frameRateFPS[1]);
        if (err) {
            console.log(err);
        } else {
            console.log(fadeOutFrame);
            ffmpeg()
                .input("HIST-192-WEEK-6.mp4")
                .input("media/logo.png")
                .input("media/disclaimer.png")
                .input() // something something to create a dummy audio which will be called as [3:a] during concatenation
                .complexFilter([
                    '[0:v]trim=start=' + startSecond + ':end=' + endSecond + ',setpts=PTS-STARTPTS[trimmedV]',
                    '[0:a]atrim=start=' + startSecond + ':end=' + endSecond + ',asetpts=PTS-STARTPTS[trimmedA]',
                    '[1:v]setdar=16:9[watermark]',
                    '[trimmedV][watermark]overlay=0:0[trimmedBrandedV]',
                    '[trimmedBrandedV]fade=t=in:st=0:d=1,fade=t=out:st=' + fadeOutTime + ':d=1[trimmedBrandedFadedV]',
                    '[trimmedA]afade=t=in:st=0:d=1,afade=t=out:st=' + fadeOutTime + ':d=1[trimmedFadedA]',                    
                    '[2:v]fps=fps='+fpsValue+',loop=loop='+(Math.round(fpsValue*15))+':size='+fpsValue+':start=0[v2]',
                    '[v2]fade=t=in:st=0:d=1,fade=t=out:st=14:d=1[disclaimerV]',                    
                    '[disclaimerV][3:a][trimmedBrandedFadedV][trimmedFadedA]concat=n=2:v=1:a=1[vv][aa]' //
                ])
                .aspect('16:9')
                .outputOptions([
                    '-map [vv]',
                    '-map [aa]',
                    '-vcodec libx264',
                    '-s 1920x1080'
                ])
                .withOutputFormat(to)
                .on('progress', function (progress) {
                    frames = progress.frames;
                    timemark = progress.timemark;
                    console.log('currentFps:' + progress.currentFps + ' Processing: ' + progress.frames + '/' + (durationSeconds * Math.round(fpsValue)) + ' timemark: ' + progress.timemark);
                })
                .on("end", function (stdout, stderr) {
                    console.log("Finished");
                    res.download(__dirname + fileName, function (err) {
                        if (err) throw err;
                        fs.unlink(__dirname + fileName, function (err) {
                            if (err) throw err;
                            console.log("File deleted");
                        });
                    });
                    fs.unlink("tmp/" + file.name, function (err) {
                        if (err) throw err;
                        console.log("File deleted");
                    });
                })
                .on("error", function (err) {
                    console.log("an error happened: " + err.message);
                    fs.unlink("tmp/" + file.name, function (err) {
                        if (err) throw err;
                        console.log("File deleted");
                    });
                })
                .saveToFile(__dirname + fileName);;
        }
    });

[stepin]

-f lavfi part is related to #1282