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• dnn/vf_dnn_detect.c : add tensorflow output parse support

  6 mai 2021, par Ting Fu

  dnn/vf_dnn_detect.c : add tensorflow output parse support
  Testing model is tensorflow offical model in github repo, please refer
  
  https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/tf2_detection_zoo.md
  
  to download the detect model as you need.
  
  For example, local testing was carried on with 'ssd_mobilenet_v2_coco_2018_03_29.tar.gz', and
  
  used one image of dog in
  
  https://github.com/tensorflow/models/blob/master/research/object_detection/test_images/image1.jpg
  Testing command is :
  
  ./ffmpeg -i image1.jpg -vf dnn_detect=dnn_backend=tensorflow:input=image_tensor:output=\
  
  "num_detections&detection_scores&detection_classes&detection_boxes":model=ssd_mobilenet_v2_coco.pb,\
  
  showinfo -f null -
  We will see the result similar as below :
  
  [Parsed_showinfo_1 @ 0x33e65f0]   side data - detection bounding boxes :
  
  [Parsed_showinfo_1 @ 0x33e65f0] source : ssd_mobilenet_v2_coco.pb
  
  [Parsed_showinfo_1 @ 0x33e65f0] index : 0,       region : (382, 60) -> (1005, 593), label : 18, confidence : 9834/10000.
  
  [Parsed_showinfo_1 @ 0x33e65f0] index : 1,       region : (12, 8) -> (328, 549), label : 18, confidence : 8555/10000.
  
  [Parsed_showinfo_1 @ 0x33e65f0] index : 2,       region : (293, 7) -> (682, 458), label : 1, confidence : 8033/10000.
  
  [Parsed_showinfo_1 @ 0x33e65f0] index : 3,       region : (342, 0) -> (690, 325), label : 1, confidence : 5878/10000.
  There are two boxes of dog with cores 94.05% & 93.45% and two boxes of person with scores 80.33% & 58.78%.
  Signed-off-by : Ting Fu <ting.fu@intel.com>
  
  Signed-off-by : Guo, Yejun <yejun.guo@intel.com>
  

  • [DH] libavfilter/vf_dnn_detect.c

• ffmpeg hardcode subtitles, no subtitles but no output error

  8 février 2024, par Rafael Castelo

  I'm trying to hardcode subtitles for a project I'm working on : https://scriptme.io an mp4 files using an external SRT subtitles file.
Despite getting a succesful result as output :

  


  video:3923kB audio:975kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.344595%
[libx264 @ 0x63b08c0] frame I:9     Avg QP:15.65  size: 31298
[libx264 @ 0x63b08c0] frame P:609   Avg QP:20.37  size:  4283
[libx264 @ 0x63b08c0] frame B:1242  Avg QP:23.74  size:   907
[libx264 @ 0x63b08c0] consecutive B-frames:  3.3% 15.4% 23.1% 58.3%
[libx264 @ 0x63b08c0] mb I  I16..4: 21.5% 54.0% 24.5%
[libx264 @ 0x63b08c0] mb P  I16..4:  1.2%  2.7%  0.3%  P16..4: 18.7%  4.2%  1.6%  0.0%  0.0%    skip:71.4%
[libx264 @ 0x63b08c0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8: 13.9%  0.6%  0.0%  direct: 0.1%  skip:85.2%  L0:41.5% L1:56.8% BI: 1.7%
[libx264 @ 0x63b08c0] 8x8 transform intra:62.4% inter:86.2%
[libx264 @ 0x63b08c0] coded y,uvDC,uvAC intra: 36.7% 53.0% 15.0% inter: 2.2% 3.1% 0.1%
[libx264 @ 0x63b08c0] i16 v,h,dc,p: 42% 20% 13% 25%
[libx264 @ 0x63b08c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 15% 28%  3%  4%  6%  4%  5%  3%
[libx264 @ 0x63b08c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 23% 14%  4%  6%  7%  5%  4%  2%
[libx264 @ 0x63b08c0] i8c dc,h,v,p: 51% 17% 26%  6%
[libx264 @ 0x63b08c0] Weighted P-Frames: Y:0.2% UV:0.2%
[libx264 @ 0x63b08c0] ref P L0: 69.1%  9.6% 15.1%  6.1%
[libx264 @ 0x63b08c0] ref B L0: 87.2% 10.7%  2.1%
[libx264 @ 0x63b08c0] ref B L1: 97.9%  2.1%
[libx264 @ 0x63b08c0] kb/s:517.69
[aac @ 0x63b3600] Qavg: 257.742


  


  However once I play the video with any player, the subtitles aren't there.

  


  This is the command I'm using for the task

  


  ffmpeg -i https://some-bucket.s3.region.amazonaws.com/my-video.mp4 -f mp4 -vf subtitles=sub.srt subtitled-video.mp4


  


• FFMPEG unexpected behavior inside nodejs Lambda function

  29 juin 2021, par Rafael Castelo

  I'm trying to burn subtitles into a video using FFMPEG. I'm working within a serverless lambda architecture, and we've used FFMPEG with lambda by using layers before and everything worked okay.
Now I'm trying to burn subtitles inside a video using the following command :

  


  ffmpeg -i https://some-bucket.s3.region.amazonaws.com/my-video.mp4 -f mp4 -vf subtitles=sub.srt subtitled-video.mp4


  


  The issue is, that command works perfectly inside my local machine or any other instance I try. However inside my lambda function, I just get the original video without the subtitles.
At first I thought it could be the ffmpeg build I was using, but after trying wiht it, it worked in every other environment I tried.

  


  Also I don't get any error in the output from the ffmpeg job inside lambda, everything seeems to work okay. Just that it doesn't burn the subtitles

  


  I hope you can help me with this issue. Or at least point me in the right direction.

  


  Thanks in advance