[FFmpeg-trac] #6209(undetermined:new): lagarith decoder is not bitexact
FFmpeg
trac at avcodec.org
Wed Mar 1 15:00:45 EET 2017
#6209: lagarith decoder is not bitexact
-------------------------------------+-------------------------------------
Reporter: ami_stuff | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: | undetermined
unspecified | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
what I did to test:
1. created rawvideo rgb24 "input.avi" file
2. ffmpeg -i input.avi -f rawvideo input.raw
3. imported "input.avi" file into VirtualDub and encoded it as lagarith
rgb (default) - lararith.avi
4. ffmpeg -i lagarith.avi -f rawvideo lagarith.raw
5. compared input.raw with lagarith.raw - files are not identical
6. imported "lagarith.avi" into VirtualDub and decoded it to rawvideo
rgb24 - lagadec.avi
7. ffmpeg -i lagadec.avi -f rawvideo lagadec.raw
8. compared input.raw with lagadec.raw - files are identical
{{{
C:\>ffmpeg -i C:\lagarith.avi out.avi
ffmpeg version 3.2.git Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.6.2 (GCC)
configuration: --disable-pthreads --disable-ffprobe --enable-gpl
libavutil 55. 47.100 / 55. 47.100
libavcodec 57. 81.100 / 57. 81.100
libavformat 57. 66.102 / 57. 66.102
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 74.100 / 6. 74.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
[lagarith @ 0237d5e0] Warning: not compiled with thread support, using
thread em
ulation
Input #0, avi, from 'C:\lagarith.avi':
Duration: 00:00:03.20, start: 0.000000, bitrate: 6636 kb/s
Stream #0:0: Video: lagarith (LAGS / 0x5347414C), rgb24, 500x500, 6827
kb/s,
10 fps, 10 tbr, 10 tbn, 10 tbc
[lagarith @ 0271fce0] Warning: not compiled with thread support, using
thread em
ulation
[mpeg4 @ 02374c40] Warning: not compiled with thread support, using thread
emula
tion
Output #0, avi, to 'out.avi':
Metadata:
ISFT : Lavf57.66.102
Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 500x500,
q=2-31, 200
kb/s, 10 fps, 10 tbn, 10 tbc
Metadata:
encoder : Lavc57.81.100 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream mapping:
Stream #0:0 -> #0:0 (lagarith (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
frame= 32 fps=0.0 q=25.7 Lsize= 268kB time=00:00:03.20 bitrate=
685.2kbits
/s speed=12.8x
video:261kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing o
verhead: 2.418098%
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6209>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list