[FFmpeg-trac] #6922(undetermined:new): transcode with ffmpeg may eat up a lot of memory

[FFmpeg]

#6922: transcode with ffmpeg may eat up a lot of memory
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             Reporter:  JasonZhang   |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by JasonZhang):

 My complete ffmpeg command:
 ./ffmpeg -i "test.mp4"  -s 854x480  -vcodec libx264 -x264opts keyint=50
 -b:v 238k -vf
 "movie=t01934a04f8ecfe144e.png:loop=0,setpts=N/FRAME_RATE/TB,scale=1280*25/100*1/1:ih*1280*25/100/iw
 [watermark]; [vf0] fifo [vf1];[vf1][watermark] overlay=main_w-
 overlay_w-0:0:eof_action=endall[vf2]" -acodec  libfdk_aac  -ar 44100
 -movflags faststart  -f mp4 output.mp4

 If "fifo" filter not used,another error occured,reference link here:

 https://stackoverflow.com/questions/40735986/ffmpeg-buffer-queue-overflow-
 dropping-with-trim-and-atrim-filters

 error log:
 [Parsed_overlay_3 @ 0x3e2ee80] [framesync @ 0x34702a8] Buffer queue
 overflow, dropping.
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x3306d60] stream 0, sample 7162, dts 238733333
 [Parsed_overlay_3 @ 0x3e2ee80] Copying data in avfilter.
 [Parsed_overlay_3 @ 0x3e2ee80] Incoming frame (time:238.667) from link #0
 [Parsed_overlay_3 @ 0x3e2ee80] [framesync @ 0x34702a8] Buffer queue
 overflow, dropping.
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x3306d60] stream 0, sample 7163, dts 238766667

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Ticket URL: <https://trac.ffmpeg.org/ticket/6922#comment:3>
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