rv60: visible artefacts

[ami_stuff]

./ffmpeg -i test10_artefacts.rmhd out.avi
ffmpeg version N-117708-g8503c64aa8 Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: 
  libavutil      59. 46.100 / 59. 46.100
  libavcodec     61. 24.100 / 61. 24.100
  libavformat    61.  9.100 / 61.  9.100
  libavdevice    61.  4.100 / 61.  4.100
  libavfilter    10.  6.101 / 10.  6.101
  libswscale      8.  9.101 /  8.  9.101
  libswresample   5.  4.100 /  5.  4.100
Input #0, rm, from 'test10_artefacts.rmhd':
  Duration: 00:00:10.00, start: 0.000000, bitrate: 851 kb/s
  Stream #0:0: Video: rv60 (RV60 / 0x30365652), yuv420p, 640x480, 713 kb/s, 24 fps, 24 tbr, 1k tbn
  Stream #0:1: Audio: aac (LC) (raac / 0x63616172), 44100 Hz, stereo, fltp, 132 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (rv60 (native) -> mpeg4 (native))
  Stream #0:1 -> #0:1 (aac (native) -> ac3 (native))
Press [q] to stop, [?] for help
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf61.9.100
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, progressive), 640x480, q=2-31, 200 kb/s, 24 fps, 24 tbn
    Metadata:
      encoder         : Lavc61.24.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
  Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp, 192 kb/s
    Metadata:
      encoder         : Lavc61.24.100 ac3
frame=  229 fps=0.0 q=31.0 size=     768KiB time=00:00:09.54 bitrate= 659.4kbits[out#0/avi @ 0x55ae5c37ea80] video:733KiB audio:233KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 2.289515%
frame=  241 fps=0.0 q=31.0 Lsize=     989KiB time=00:00:09.95 bitrate= 813.6kbits/s speed=18.8x   

[ami_stuff]

​https://easyupload.io/z27ats

[pross]

@ami_stuff: can you post the realplayer version and operating system used to create this sample? thx

[ami_stuff]

RealProducer HD 16.1.0.1, Win 7

[pross]

Reproduced.

No artefacts seen when decoding with latest realplayer v24.0.1.306 ​https://cache-download.real.com/free/windows/installer/player/rp24/T24ENFIB/RealPlayer.exe

[ami_stuff]

thanks for the fix for this!

i have created ticket #11293 with another problematic sample, artefacts are still visible there (at the bottom) with the patch applied from the ffmpeg-devel

[pross]

Fixed in 006718c4755cdb3e8543761b0e64f2489ac6bd1a