[FFmpeg-trac] #5732(avcodec:open): Display corruption on very high-bitrate H.264 files

FFmpeg trac at avcodec.org
Sun Jul 24 22:20:22 EEST 2016

#5732: Display corruption on very high-bitrate H.264 files
             Reporter:  Sesse       |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  minor       |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  h264        |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |

Comment (by cehoyos):

 Replying to [comment:15 Sesse]:
 > Well, yes and no. The stream is encoded at constant quantizer 15, which
 for the content I'm interested in is as good as visually lossless.
 Normally, for me, this does indeed yield streams around 25 Mbit/sec, but
 this specific demo is an outlier (I like to call these “streamkillers”; I
 guess you can understand why), and I've seen it spike to 170 Mbit/sec or
 so in parts.

 The - imo - interesting question is now: What does x264 produce with a
 constant quantiser of 15 (or lower)?

 I cannot really comment on your other questions: On this bug tracker (and
 the mailing lists), users were often warned (by different people) that
 hardware encoders (once they would be supported) will disappoint everybody
 in every regard. I never had a strong opinion on this, I don't encode
 But preferring a very new encoder "for archiving" over one that was most
 likely tested more than anything similar surprised me...

Ticket URL: <https://trac.ffmpeg.org/ticket/5732#comment:17>
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