Changes between Initial Version and Version 1 of Ticket #2748, comment 20


Ignore:
Timestamp:
Aug 20, 2014, 4:15:57 PM (6 years ago)
Author:
smallishzulu
Comment:

Legend:

Unmodified
Added
Removed
Modified
  • Ticket #2748, comment 20

    initial v1  
    1 Yesterday, I got the latest snaphot from GIT and tested the case.
    2 On a CBR test, if outpur bandwidth rate is high, some decoders/TS analyze SWs give PCR accuracy and repetition error (very rare).
    3 
    4 Example:
    5 ffmpeg -i pipe -aspect 16:9 -fflags +genpts -vcodec libx264 -preset ultrafast -vb 25000k -minrate 25000k -maxrate 25000k -bufsize 2500k -muxrate 27000k -tune stillimage -qmin 20 -pix_fmt yuv420p -vbsf h264_mp4toannexb -strict experimental -acodec libfdk_aac -ab 128k -flush_packets 0 -f mpegts 'udp://225.2.1.1:1234?pkt_size=1316'
    6 
    7 This works fine. Time to time on some decoders (like Ericsson) make black frame. But no PCR error.
    8 
    9 ffmpeg -i pipe -aspect 16:9 -fflags +genpts -vcodec libx264 -preset ultrafast -vb 50000k -minrate 50000k -maxrate 50000k -bufsize 10000k -muxrate 54000k -tune stillimage -qmin 20 -pix_fmt yuv420p -vbsf h264_mp4toannexb -strict experimental -acodec libfdk_aac -ab 128k -flush_packets 0 -f mpegts 'udp://225.2.1.1:1234?pkt_size=1316'
    10 
    11 In this case, it reports PCR accuracy and repetition error and decoders gives alarm as well.
    12 
    13 BR,
     1.