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• Convert Audio to Video (with Poster) and Convert Audio for HLS (Laravel-FFMpeg)

  4 octobre 2020, par m_zanjani

  I implemented a code with Laravel and used Laravel-FFMpeg for media processing.
I could not find the answers to my questions so I am asking them here and I hope someone can help me.

  


  

  • How can I convert an audio file (wav, mp3, etc.) to a video file
(mp4) using Laravel-FFmpeg or PHP-FFMpeg (with an image as a
poster) ?

  


  


  // something like this command
ffmpeg -loop 1 -i image.jpg -i audio.wav -c:v libx264 -tune stillimage 
-c:a aac -b:a 192k -pix_fmt yuv420p -shortest out.mp4


  


  

  • How can I convert an audio file (wav, mp3, etc.) to HLS using Laravel-FFmpeg or PHP-FFMpeg ?

    

    • I did this correctly for the video file and I had no problem but I
did not see a sample for the audio file.

    


    • Is it possible to stream an audio file and convert it to HLS (making ts and m3u8 files) ? I mean, do I need to create HLS files to stream audio files on players like Video.js ? Does streaming an audio file make sense ?

    


    • Do we need to convert the audio file to a video file first and then build the HLS, or can we build the HLS directly ?

    


    


  


  • With this package, can a watermark be placed on a photo ? Or wrote a text on it (drawtext command) ?

  


  • How to add album art (jpg) to audio file (mp3) using this package ?

  


  


  // something like this command
ffmpeg -i in.mp3 -i test.png -map 0:0 -map 1:0 -c copy -id3v2_version 3 -metadata:s:v 
title="Album cover" -metadata:s:v comment="Cover (front)" out.mp3


  


  If you provide a sample code of this package or PHP-FFMpeg for the above three questions, I would be grateful.

  


  Thank You

  


• Evolution #3770 : Logo des articles sur les listes

  17 février 2021, par b b

  nicod _ a écrit :

  Je pensais cibler tous les td.logo, mais en fait non, il ne faut pas, ils n’ont pas tous cette dimension.

  Ha, tu es tombé sur quel type de cas foireux ? (comme c’est en mode cover, au pire ça remplira avec une image dégradé si c’est plus grand)

• FFmpeg, low quality merge using overlay filter [closed]

  24 mars, par He2A

  I am currently building a script, part of its functionality is to generate a cover art. I want to limit the scripts dependency to ffmpeg only so please don't suggest to use any other software to do the same.

  


  For this, I am using ffmpeg to generate separate components for the coverart, code is given below :

  


  # Draws transparent circle in correct background
ffmpeg -y -f lavfi -i "color=c=0x20292FFF:s=4000x4000,format=rgba" -filter_complex "geq=r='32':g='41':b='47':a='255*(1-between(hypot(X-2000,Y-2000),0,1150))'" -frames:v 1 -update 1 background.png

# Draws a circle gradient
ffmpeg -y -f lavfi -i "gradients=s=4000x4000:c0=0x33517e:c1=0x645098:c2=0xa53f97:c3=0xdf1177:c4=0xff033e:c5=0x2f4858:n=5:y0=750:x0=750:y1=3250:x1=3250:t=linear,format=rgba" -filter_complex "geq=g='g(X,Y)':a='255*between(hypot(X-2000,Y-2000),0,1200)'" -frames:v 1 -update 1 gradcir.png

# Draws the inner symbol
ffmpeg -y -f lavfi -i "color=c=0x20292FFF:s=4000x4000,format=rgba" -vf "geq=a='255*max(lte((X-2000+(530/3)+25)+sqrt(3)*abs(Y-2000),530)*gte(X-2000+(530/3)+25,0),between(hypot(X-2000,Y-2000),570,630))':r='255*max(lte((X-2000+(530/3)+25)+sqrt(3)*abs(Y-2000),530)*gte(X-2000+(530/3)+25,0),between(hypot(X-2000,Y-2000),570,630))':g='255*max(lte((X-2000+(530/3)+25)+sqrt(3)*abs(Y-2000),530)*gte(X-2000+(530/3)+25,0),between(hypot(X-2000,Y-2000),570,630))':b='255*max(lte((X-2000+(530/3)+25)+sqrt(3)*abs(Y-2000),530)*gte(X-2000+(530/3)+25,0),between(hypot(X-2000,Y-2000),570,630))'" -frames:v 1 shape.png


  


  Now to merge all three pngs, I am using the following command :

  


  ffmpeg -y -i background.png -i gradcir.png -i shape.png -filter_complex "[0][1]overlay[tmp];[tmp][2]overlay" cover.png


  


  All the code works but the problem is that the output is severely low quality with banding and improper merges in the borders of each image.

  


  I believe png is lossless so there shouldn't be any issue with artifacts but still I experimented with different levels of png compression but to no avail. I even tried enforcing rgba format for all three images prior to merging but to no avail.

  


  For now I alleviated the problem by generating all images in 4000x4000 resolution, applying a deband filter and then resizing it to 1000x1000.

  


  ffmpeg -y -i background.png -i gradcir.png -i shape.png -filter_complex "[0][1]overlay[tmp1];[tmp1][2]overlay[tmp2];[tmp2]format=rgb24,scale=2000:2000:flags=spline,deband,scale=1000:1000:flags=lanczos" -frames:v 1 -update 1 cover.png


  


  But the above method is expensive, which is problematic for low performance systems. Can anyone find out what seems to be the issue or suggest some better way to merge it ?