#7176: Resolution-related artefacts with clearvideo --------------------------------------+--------------------------------- Reporter: cehoyos | Owner: Type: defect | Status: new Priority: normal | Component: avcodec Version: git-master | Keywords: clv Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 --------------------------------------+--------------------------------- Piotr kindly provided a new set of !RealMedia files with Clearvideo content that shows heavy artefacts with FFmpeg but not !RealPlayer. {{{ $ ffmpeg -i bean2_324_500kbps_normal_encoding.rm -qscale 2 out.avi ffmpeg version N-90888-gad16423 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 6.4.0 (GCC) configuration: --enable-gpl libavutil 56. 17.100 / 56. 17.100 libavcodec 58. 19.100 / 58. 19.100 libavformat 58. 13.100 / 58. 13.100 libavdevice 58. 4.100 / 58. 4.100 libavfilter 7. 21.100 / 7. 21.100 libswscale 5. 2.100 / 5. 2.100 libswresample 3. 2.100 / 3. 2.100 libpostproc 55. 2.100 / 55. 2.100 Input #0, rm, from 'bean2_324_500kbps_normal_encoding.rm': Metadata: title : Title author : Author copyright : Copyrgiht Duration: 00:00:41.96, start: 0.000000, bitrate: 404 kb/s Stream #0:0: Video: clearvideo (CLV1 / 0x31564C43), yuv420p, 324x244, 500 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc Please use -q:a or -q:v, -qscale is ambiguous Stream mapping: Stream #0:0 -> #0:0 (clearvideo (native) -> mpeg4 (native)) Press [q] to stop, [?] for help Output #0, avi, to 'out.avi': Metadata: INAM : Title author : Author ICOP : Copyrgiht ISFT : Lavf58.13.100 Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 324x244, q=2-31, 200 kb/s, 15 fps, 15 tbn, 15 tbc Metadata: encoder : Lavc58.19.100 mpeg4 Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1 frame= 630 fps=0.0 q=2.0 Lsize= 16164kB time=00:00:42.00 bitrate=3152.8kbits/s speed=81.4x video:16143kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.127851% }}} The output looks horribly broken, the issue is apparently related to the width, 320 works fine now.
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