[FFmpeg-trac] #9602(avformat:new): When decoding apng the image has uncleaned parts.
FFmpeg
trac at avcodec.org
Wed Jan 19 08:02:02 EET 2022
#9602: When decoding apng the image has uncleaned parts.
------------------------------------+------------------------------------
Reporter: Ted Zyzsdy | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: apng | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
------------------------------------+------------------------------------
Description changed by Ted Zyzsdy:
Old description:
> Summary of the bug:
>
> I need to convert the format of a set of apng files to gif. But I found
> in the conversion result that part of the image was not cleaned properly,
> but overlapped on top of the canvas. To determine whether the problem was
> in decoding apng or encoding gif, I converted the apng as a sequence of
> jpeg images and still found the same problem.
>
> Then, I checked at the apng file, and in the fcTL block at frame 7, the
> dispose_op is marked as 0x01 APNG_DISPOSE_OP_BACKGROUND, indicating that
> the background needs to be cleared before the frame is rendered, but
> ffmpeg doesn't actually do that.
>
> How to reproduce:
> {{{
> % ffmpeg.exe -i apng_image_uncleaned_part.png -f image2 de-%03d.jpg
> ffmpeg version 2022-01-17-git-dcc9454ab9-full_build-www.gyan.dev
> Copyright (c) 2000-2022 the FFmpeg developers
> built with gcc 11.2.0 (Rev5, Built by MSYS2 project)
> configuration: --enable-gpl --enable-version3 --enable-static
> --disable-w32threads --disable-autodetect --enable-fontconfig --enable-
> iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib
> --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-
> libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-
> libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-
> libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-
> libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-
> libxavs2 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-
> libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-
> libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf
> --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-
> ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2
> --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo
> --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug
> --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame
> --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-
> amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb
> --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa
> --enable-libbs2b --enable-libflite --enable-libmysofa --enable-
> librubberband --enable-libsoxr --enable-chromaprint
> libavutil 57. 18.100 / 57. 18.100
> libavcodec 59. 20.100 / 59. 20.100
> libavformat 59. 17.101 / 59. 17.101
> libavdevice 59. 5.100 / 59. 5.100
> libavfilter 8. 25.100 / 8. 25.100
> libswscale 6. 5.100 / 6. 5.100
> libswresample 4. 4.100 / 4. 4.100
> libpostproc 56. 4.100 / 56. 4.100
> }}}
>
> However, when I try to convert with an older version of ffmpeg 4.3.1
> downloaded the year before, this problem does not exist.
>
> {{{
> % ffmpeg.exe -i apng_image_uncleaned_part.png -f image2 de-%03d.jpg
> ffmpeg version 4.3.1-2020-11-08-full_build-www.gyan.dev Copyright (c)
> 2000-2020 the FFmpeg developers
> built with gcc 10.2.0 (Rev3, Built by MSYS2 project)
> configuration: --enable-gpl --enable-version3 --enable-static
> --disable-w32threads --disable-autodetect --enable-fontconfig --enable-
> iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma
> --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh
> --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca
> --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e
> --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
> --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass
> --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-
> libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
> llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
> --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libcdio
> --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
> libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-
> libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc
> --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-
> libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-
> libflite --enable-libmysofa --enable-librubberband --enable-libsoxr
> --enable-chromaprint
> libavutil 56. 51.100 / 56. 51.100
> libavcodec 58. 91.100 / 58. 91.100
> libavformat 58. 45.100 / 58. 45.100
> libavdevice 58. 10.100 / 58. 10.100
> libavfilter 7. 85.100 / 7. 85.100
> libswscale 5. 7.100 / 5. 7.100
> libswresample 3. 7.100 / 3. 7.100
> libpostproc 55. 7.100 / 55. 7.100
> }}}
>
> This version outputs the expected result.
>
> The original apng file uploaded as attachment
> apng_image_uncleaned_part.png
> Expected result (frame 7) uploaded as attachment
> apng_uncleaned_part_frame_7_expected_result.jpg
> The problem result (frame 7) uploaded as attachment
> apng_uncleaned_part_frame_7_defected_result.jpg
New description:
Summary of the bug:
I need to convert the format of a set of apng files to gif. But I found in
the conversion result that part of the image was not cleaned properly, but
overlapped on top of the canvas. To determine whether the problem was in
decoding apng or encoding gif, I converted the apng as a sequence of jpeg
images and still found the same problem.
Then, I checked at the apng file, and in the fcTL block at frame 7, the
dispose_op is marked as 0x01 APNG_DISPOSE_OP_BACKGROUND, indicating that
the background needs to be cleared before the frame is rendered, but
ffmpeg doesn't actually do that.
How to reproduce:
{{{
% ffmpeg.exe -i apng_image_uncleaned_part.png -f image2 de-%03d.jpg
ffmpeg version 2022-01-17-git-dcc9454ab9-full_build-www.gyan.dev Copyright
(c) 2000-2022 the FFmpeg developers
built with gcc 11.2.0 (Rev5, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2
--enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2
--enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx
--enable-mediafoundation --enable-libass --enable-frei0r --enable-
libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf
--enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-
ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2
--enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo
--enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug
--enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame
--enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-
amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa
--enable-libbs2b --enable-libflite --enable-libmysofa --enable-
librubberband --enable-libsoxr --enable-chromaprint
libavutil 57. 18.100 / 57. 18.100
libavcodec 59. 20.100 / 59. 20.100
libavformat 59. 17.101 / 59. 17.101
libavdevice 59. 5.100 / 59. 5.100
libavfilter 8. 25.100 / 8. 25.100
libswscale 6. 5.100 / 6. 5.100
libswresample 4. 4.100 / 4. 4.100
libpostproc 56. 4.100 / 56. 4.100
Input #0, apng, from 'apng_image_uncleaned_part.png':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: apng, rgba(pc), 370x300, 20 fps, 20 tbr, 100k tbn
Stream mapping:
Stream #0:0 -> #0:0 (apng (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be206240] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be219600] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be446340] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be81dfc0] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be83afc0] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be8594c0] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be8800c0] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be8adcc0] deprecated
pixel format used, make sure you did set range correctly
[swscaler @ 00000264be1f9280] [swscaler @ 00000264be8cdcc0] deprecated
pixel format used, make sure you did set range correctly
Output #0, image2, to 'de-%03d.jpg':
Metadata:
encoder : Lavf59.17.101
Stream #0:0: Video: mjpeg, yuvj444p(pc, progressive), 370x300, q=2-31,
200 kb/s, 20 fps, 20 tbn
Metadata:
encoder : Lavc59.20.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame= 20 fps=0.0 q=24.8 Lsize=N/A time=00:00:01.00 bitrate=N/A
speed=19.9x
video:236kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
However, when I try to convert with an older version of ffmpeg 4.3.1
downloaded the year before, this problem does not exist.
{{{
% ffmpeg.exe -i apng_image_uncleaned_part.png -f image2 de-%03d.jpg
ffmpeg version 4.3.1-2020-11-08-full_build-www.gyan.dev Copyright (c)
2000-2020 the FFmpeg developers
built with gcc 10.2.0 (Rev3, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-
libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq
--enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2
--enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom
--enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r
--enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-
libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid
--enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va
--enable-dxva2 --enable-libmfx --enable-libcdio --enable-libgme --enable-
libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-
libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame
--enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-
libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis
--enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa
--enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, apng, from 'apng_image_uncleaned_part.png':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: apng, rgba(pc), 370x300, 20 fps, 20 tbr, 100k tbn,
100k tbc
Stream mapping:
Stream #0:0 -> #0:0 (apng (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 000002071a438f80] deprecated pixel format used, make sure you
did set range correctly
Output #0, image2, to 'de-%03d.jpg':
Metadata:
encoder : Lavf58.45.100
Stream #0:0: Video: mjpeg, yuvj444p(pc), 370x300, q=2-31, 200 kb/s, 20
fps, 20 tbn, 20 tbc
Metadata:
encoder : Lavc58.91.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame= 20 fps=0.0 q=24.8 Lsize=N/A time=00:00:01.00 bitrate=N/A
speed=17.6x
video:233kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
This version outputs the expected result.
The original apng file uploaded as attachment
apng_image_uncleaned_part.png
Expected result (frame 7) uploaded as attachment
apng_uncleaned_part_frame_7_expected_result.jpg
The problem result (frame 7) uploaded as attachment
apng_uncleaned_part_frame_7_defected_result.jpg
--
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9602#comment:1>
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