[FFmpeg-trac] #1157(undetermined:new): Circular buffer overrun with 4+ ffmpeg instances.
FFmpeg
trac at avcodec.org
Sun Apr 1 13:39:22 CEST 2012
#1157: Circular buffer overrun with 4+ ffmpeg instances.
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Reporter: Involar | Type: defect
Status: new | Priority: normal
Component: undetermined | Version: 0.10.2
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Hello, im trying to launch multiple transcoding instances on an i7 2600k.
Now with 3 instaces everything is fine, but after 4th I get crashes with
this error. CPU is at no more than 30% at the moment of crash. Memory
ussage is about 500mb/4G. Here is the output.
ffmpeg -i udp://@239.1.1.2:5000 -pass 1 -crf 5 -vcodec libx264 -preset
ultrafast -g 20 -b 500k -bt 10k -acodec libfaac -ab 128k -ar 48000 -ac 2
-f mpegts udp://192.168.1.136:5004 -v warning -bufsize 10000 -vframes 10
[mpeg2video @ 0x249da20] mpeg_decode_postinit() failure
Last message repeated 5 times
[mpegts @ 0x24733a0] max_analyze_duration 5000000 reached at 5016000
[mpegts @ 0x24733a0] Estimating duration from bitrate, this may be
inaccurate
Please use -b:a or -b:v, -b is ambiguous
[udp @ 0x24738e0] Circular buffer overrun. To avoid, increase fifo_size
URL option. To survive in such case, use overrun_nonfatal option
[mpegts @ 0x24733a0] PES packet size mismatch
[mpeg2video @ 0x249da20] ac-tex damaged at 31 4
[mpeg2video @ 0x249da20] Warning MVs not available
[mp2 @ 0x24a3be0] incomplete frame
Error while decoding stream #0:1.
Now I get it that my fifo buffer is too small to handle 4 instances. Can
you please advise where can I change the initial value ?
Thanks in advance
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1157>
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