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• I use php-ffmpeg to add watermark to my video and the result throws an error Encoding failed

  13 juin 2023, par yu song

  I use php-ffmpeg to add watermark to my video and the result throws an error Encoding failed

  


  public function video_watermark()


  


  $video_url = $this->request->post("video_url",'\uploads\20230609\57a5e95d87e9802dc32012285ee77a4b.mp4');
$watermark_path = $this->request->post("watermark_path",'\uploads\20230613\398d67af5355a56b0820f900379420fb.png');

$rand_str32 = Random::alnum(32);
$base_dir_path = '/tmp/video_watermark/';
$dir_path = PUBLIC_PATH . $base_dir_path;
if (!is_dir($dir_path)) {
    mkdir(iconv("UTF-8", "GBK", $dir_path),0777,true);
}

$ffmpeg = FFMpeg::create();
$video = $ffmpeg->open($video_url);
// watermark
$video
    ->filters()
    ->watermark($watermark_path, array(
        'position' => 'relative',
        'bottom' => 50,
        'right' => 50,
    ));
$format = new X264();
$video->save($format, $dir_path . '/' . $rand_str32 . '.mp4');
// return
$this->success('success', [
    'video_url' => $dir_path . '/' . $rand_str32 . '.mp4'
], 200);


  


  


  When I print the command

  


  $command = $video->getFinalCommand($format, $dir_path . '/' . $rand_str32 . '.mp4') ;

  


  var_dump($command) ;die ;

  


  array(2) 
[0]=>
string(653) "-y -i D :\WWW\fastadmin\public\uploads\20230609\57a5e95d87e9802dc32012285ee77a4b.mp4 -vcodec libx264 -acodec aac -b:v 1000k -refs 6 -coder 1 -sc_threshold 40 -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff 4 -trellis 1 -b:a 128k -vf movie=D :\WWW\fastadmin\public\uploads\20230613\398d67af5355a56b0820f900379420fb.png [watermark] ;[in][watermark] overlay=main_w - 50 - overlay_w:main_h - 50 - overlay_h [out] -pass 1 -passlogfile C :\Users\qq\AppData\Local\Temp\ffmpeg-passes6488893fb88c27rufi/pass-6488893fb8b6a D :\WWW\fastadmin\public/tmp/video_watermark//6lutEFvBLNSTP2Rfs7nW8xGAUMprz1ZD.mp4"
[1]=>
string(653) "-y -i D :\WWW\fastadmin\public\uploads\20230609\57a5e95d87e9802dc32012285ee77a4b.mp4 -vcodec libx264 -acodec aac -b:v 1000k -refs 6 -coder 1 -sc_threshold 40 -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff 4 -trellis 1 -b:a 128k -vf movie=D :\WWW\fastadmin\public\uploads\20230613\398d67af5355a56b0820f900379420fb.png [watermark] ;[in][watermark] overlay=main_w - 50 - overlay_w:main_h - 50 - overlay_h [out] -pass 2 -passlogfile C :\Users\qq\AppData\Local\Temp\ffmpeg-passes6488893fb88c27rufi/pass-6488893fb8b6a D :\WWW\fastadmin\public/tmp/video_watermark//6lutEFvBLNSTP2Rfs7nW8xGAUMprz1ZD.mp4"


  


  go execute

  


  ffmpeg -y -i D :\WWW\fastadmin\public\uploads\20230609\57a5e95d87e9802dc32012285ee77a4b.mp4 -vcodec libx264 -acodec aac -b:v 1000k -refs 6 -coder 1 -sc_threshold 40 -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff 4 -trellis 1 -b:a 128k -vf movie=D :\WWW\fastadmin\public\uploads\20230613\398d67af5355a56b0820f900379420fb.png [watermark] ;[in][watermark] overlay=main_w - 50 - overlay_w:main_h - 50 - overlay_h [out] -pass 2 -passlogfile C :\Users\qq\AppData\Local\Temp\ffmpeg-passes6488893fb88c27rufi/pass-6488893fb8b6a D :\WWW\fastadmin\public/tmp/video_watermark//6lutEFvBLNSTP2Rfs7nW8xGAUMprz1ZD.mp4

  


  Error

  


  [AVFormatContext @ 0000022ffb728f40] Unable to choose an output format for '[watermark] ;[in][watermark]' ; use a standard extension for the filename or specify the format manually.
[out#0 @ 0000022ffb728e40] Error initializing the muxer for [watermark] ;[in][watermark] : Invalid argument

  


  my php version 7.4 , php-ffmpeg v0.19.0 , ffmpeg version 5.1.2

  


  $format = new X264('libmp3lame', 'libx264') ;

  


  $format->setKiloBitrate(1000)->setAudioChannels(2)-> setAudioKiloBitrate(256) ;

  


  Still reporting an error, Encoding failed.

  


• FFmpeg synthesizes multiple videos, the final result is only sound, no picture display

  6 juillet 2023, par Halifax

  1、I first converted mp4 to ts：

  


  -i MyVideo.mp4 -vcodec copy -acodec aac -b:v 10000k MyVideo.ts


  


  2、Then scale the ts and fill the empty space：

  


  -i MyVideo.ts -vf pad=width=iw:height=ih:x=-1:y=0:color='White' -b:v 10000k MyVideo_transform.ts


  


  3、Finally use concat to merge into mp4 files：

  


  -i "concat:MyVideo_transform1.ts|MyVideo_transform2.ts" -acodec copy -vcodec copy -absf aac_adtstoasc -b:v 10000k $outputFilePath"


  


  Finally use concat to merge into mp4 files。

  


  I hope that the final merged result can see the video picture。

  


• Different ffmpeg result after saving to png

  28 juillet 2023, par Kalev Maricq

  Saving images to PNG first seems to produce different ffmpeg encodes. Running this test code

  


  from PIL import Image
import cv2
import ffmpeg
import hashlib

ffmpeg.input('test.jpg').output('testff.png').run()
cv2.imwrite('testcv.png',cv2.imread('test.jpg'))
Image.open('test.jpg').save('testpil.png')

hashes=[]
for suf in ['.jpg','ff.png','cv.png','pil.png']:
    dest='test'+suf.replace('.','')+'.mp4'
    ffmpeg.input('test'+suf).output(dest).run()
    hashes.append(hashlib.file_digest(open(dest,'rb'),'md5').hexdigest())
    
print(hashes)


  


  I get
  
['a5b744a8ac0f6de9ec4de43ff737c46e'
  
,'ab62474f2160899e064ba24890047372'
  
,'baa788d5e4ef212ab610b8b5cf7772cb'
  
,'baa788d5e4ef212ab610b8b5cf7772cb']

  


  As you can see, the only two that match are the cv2 and pillow conversions, and none of them match the original. In terms of file size, the results that passed to png first seem to be about 10% smaller than the direct-from-jpg result.

  


  Why is this happening and how can I avoid changing image data until I'm ready to encode ?