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• FFMPEG Input area failure

  6 décembre 2019, par Mike

  I’m trying to convert an input clip to a fixed, padded output and applying an overlay on it.

  This command works fine for resizing :

  ffmpeg -y -i clip.mp4 -vf scale="min(iw*375/ih\,500):min(375\,ih*500/iw),pad=500:375:(500-iw)/2:(375-  ih)/2" output.mp4

  I created the following one to make sure the overlay would be created :

  ffmpeg -y -i clip.mp4 -i clip_overlay.png -strict -2 -filter_complex "[0]scale=min(iw*375/ih\,500):min(375\,ih*500/iw),pad=500:375:(500-iw)/2:(375-ih)/2[v];[v][1]overlay=x=W-w-5:y=H-h-5" output.mp4

  I cannot find the error, but ffmpeg returns :

  [Parsed_pad_1 @ 0x2eae8e0] Input area 144:0:355:375 not within the padded area 0:0:500:374 or zero-sized
  
  [Parsed_pad_1 @ 0x2eae8e0] Failed to configure input pad on Parsed_pad_1
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: Invalid argument
  
  Error while processing the decoded data for stream #1:0
  
  [aac @ 0x2eb3020] Qavg: 102.113
  
  [aac @ 0x2eb3020] 2 frames left in the queue on closing

  Why does that upper command work, and combined with the second one, it doesn’t ?

• avcodec/agm : Do not allow MVs out of the picture area as no edge is allocated

  2 novembre 2019, par Michael Niedermayer

  avcodec/agm : Do not allow MVs out of the picture area as no edge is allocated
  Fixes : out of array access
  
  Fixes : 18499/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5749038406434816
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/agm.c

• FFMPEG - scrolling text in area

  25 juin 2021, par Marcin Woźniak

  I try to make scrolling news ticker on a video as overlay.
I have created a PNG background with a specified place where where i want to scrolling text appear.

  



  I tried with this :

  



  ffmpeg -i INPUT.mp4 -vf "drawtext=textfile=ticker.txt:fontfile=BebasNeue-Regular.ttf:y=h-line_h-10:x=w-mod(w*t/25\,2400*(w+tw)/w):fontcolor=white:fontsize=40:shadowx=2:shadowy=2" -codec:a copy output.mp4

  



  but this command scrolls text from right margin to left margin.

  



  What i want to achieve is that scrolling text scrolls only in selected boundary box i set (in example starts from 100px from right and ends 100px from left).

  



  I didnt find any answer here or in Google - every example scrools from left to right directly.