[FFmpeg-trac] #5354(undetermined:new): Concat filter breaks alpha overlay
FFmpeg
trac at avcodec.org
Mon Mar 21 14:04:18 CET 2016
#5354: Concat filter breaks alpha overlay
-------------------------------------+-------------------------------------
Reporter: d-fens_ | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
generating a alpha overlay over video works.
using the concat filter to concat breaks the overlay, "gradient" like
effects , like color reduced are the result
attached two test files
How to reproduce:
{{{
ffmpeg -i "overlay.png" -i "in.mp4" -filter_complex " [1:v]
setsar=sar=1/1 [sared]; [sared][0:v] overlay [overlay];[1:v][overlay]
concat=n=2" -y out.mp4
corrupts
ffmpeg -i "overlay.png" -i "in.mp4" -filter_complex " [1:v]
setsar=sar=1/1 [sared]; [sared][0:v] overlay " -y out.mp4
works
ffmpeg version
ffmpeg version N-78395-g6973846 Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 5.3.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-
libcaca --
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm
--enable-l
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
librtmp --en
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
--ena
ble-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-
libvorbis --
enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-lib
x265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma
--enable-d
ecklink --enable-zlib
libavutil 55. 17.100 / 55. 17.100
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5354>
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