[FFmpeg-trac] #63(undetermined:new): Purple bars appear when scaling a video with ffmpeg for windows
FFmpeg
trac at avcodec.org
Thu Apr 14 02:41:06 CEST 2011
#63: Purple bars appear when scaling a video with ffmpeg for windows
--------------------------------------+--------------------------
Reporter: thebombzen | Type: defect
Status: new | Priority: critical
Component: undetermined | Version: unspecified
Keywords: purple bars scale glitch | Blocked By:
Blocking: | Reproduced: 0
Analyzed: 0 |
--------------------------------------+--------------------------
I try to scale a 1920x1080 video into 800x450 with FFmpeg and strange
purple bars appear. To eliminate variables I used only yuv4mpegpipe files
and try viewing with Windows Media Player, QuickTime, and VLC, and I get
the same results.
The full ffmpeg -v 9 -loglevel 99 -i from the input file is this:
FFmpeg version git-N-29061-g5c00687, Copyright (c) 2000-2011 the FFmpeg
developers
built on Apr 12 2011 16:33:59 with gcc 4.7.0 20110402 (experimental)
configuration: --enable-static --disable-shared --enable-gpl --enable-
version3 --enable-nonfree --enable-postproc --enable-runtime-cpudetect
--disable-avisynth --enable-bzlib --disable-libopencore-amrnb --disable-
libopencore-amrwb --disable-libdirac --enable-libfaac --enable-libmp3lame
--enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-
libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
libxvid --enable-zlib --arch=x86_64 --cpu=i7 --enable-pic --enable-sram
--prefix=/usr/local/x86_64-w64-mingw32 --cross-
prefix=/usr/x86_64-w64-mingw32/bin/ --target-os=mingw32 --pkg-config=pkg-
config --extra-libs='-lorc-0.4 -lx264' --enable-stripping --disable-debug
--enable-w32threads
libavutil 50. 40. 1 / 50. 40. 1
libavcodec 52.119. 0 / 52.119. 0
libavformat 52.106. 0 / 52.106. 0
libavdevice 52. 4. 0 / 52. 4. 0
libavfilter 1. 78. 0 / 1. 78. 0
libswscale 0. 13. 0 / 0. 13. 0
libpostproc 51. 2. 0 / 51. 2. 0
[NULL @ 0000000021CFA390] Probed with size=2048 and score=100
[yuv4mpegpipe @ 0000000021CFA390] Probe buffer size limit 5000000 reached
[yuv4mpegpipe @ 0000000021CFA390] Estimating duration from bitrate, this
may be inaccurate
Input #0, yuv4mpegpipe, from 'No-purple-bars.y4m':
Duration: N/A, bitrate: N/A
Stream #0.0, 2, 100/1199: Video: rawvideo, yuv420p, 1920x1080,
100/1199, PAR 1:1 DAR 16:9, 11.99 tbr, 11.99 tbn, 11.99 tbc
At least one output file must be specified
It says duration N/A but it is only 1 second long.
The output from scaling the video was this:
C:\Users\leo\Desktop>ffmpeg -v 9 -loglevel 99 -i No-purple-bars.y4m -s
800x450 -y Yes-purple-bars.y4m
FFmpeg version git-N-29061-g5c00687, Copyright (c) 2000-2011 the FFmpeg
developers
built on Apr 12 2011 16:33:59 with gcc 4.7.0 20110402 (experimental)
configuration: --enable-static --disable-shared --enable-gpl --enable-
version3 --enable-nonfree --enable-postproc --enable-runtime-cpudetect
--disable-avisynth --enable-bzlib --disable-libopencore-amrnb --disable-
libopencore-amrwb --disable-libdirac --enable-libfaac --enable-libmp3lame
--enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-
libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
libxvid --enable-zlib --arch=x86_64 --cpu=i7 --enable-pic --enable-sram
--prefix=/usr/local/x86_64-w64-mingw32 --cross-
prefix=/usr/x86_64-w64-mingw32/bin/ --target-os=mingw32 --pkg-config=pkg-
config --extra-libs='-lorc-0.4 -lx264' --enable-stripping --disable-debug
--enable-w32threads
libavutil 50. 40. 1 / 50. 40. 1
libavcodec 52.119. 0 / 52.119. 0
libavformat 52.106. 0 / 52.106. 0
libavdevice 52. 4. 0 / 52. 4. 0
libavfilter 1. 78. 0 / 1. 78. 0
libswscale 0. 13. 0 / 0. 13. 0
libpostproc 51. 2. 0 / 51. 2. 0
[NULL @ 00000000003AA560] Probed with size=2048 and score=100
[yuv4mpegpipe @ 00000000003AA560] Probe buffer size limit 5000000 reached
[yuv4mpegpipe @ 00000000003AA560] Estimating duration from bitrate, this
may be inaccurate
Input #0, yuv4mpegpipe, from 'No-purple-bars.y4m':
Duration: N/A, bitrate: N/A
Stream #0.0, 2, 100/1199: Video: rawvideo, yuv420p, 1920x1080,
100/1199, PAR 1:1 DAR 16:9, 11.99 tbr, 11.99 tbn, 11.99 tbc
[buffer @ 00000000003AD120] w:1920 h:1080 pixfmt:yuv420p
[scale @ 00000000003ADC80] w:1920 h:1080 fmt:yuv420p -> w:800 h:450
fmt:yuv420p flags:0x4
Output #0, yuv4mpegpipe, to 'Yes-purple-bars.y4m':
Metadata:
encoder : Lavf52.106.0
Stream #0.0, 0, 1/90000: Video: rawvideo, yuv420p, 800x450 [PAR 1:1
DAR 16:9], 100/1199, q=2-31, 200 kb/s, 90k tbn, 11.99 tbc
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding
frame= 13 fps= 0 q=0.0 Lsize= 6856kB time=1.08
bitrate=51798.0kbits/s
video:0kB audio:0kB global headers:0kB muxing overhead 1.#INF00%
The ffmpeg -v 9 -loglevel 99 -i output for the output file is this:
FFmpeg version git-N-29061-g5c00687, Copyright (c) 2000-2011 the FFmpeg
developers
built on Apr 12 2011 16:33:59 with gcc 4.7.0 20110402 (experimental)
configuration: --enable-static --disable-shared --enable-gpl --enable-
version3 --enable-nonfree --enable-postproc --enable-runtime-cpudetect
--disable-avisynth --enable-bzlib --disable-libopencore-amrnb --disable-
libopencore-amrwb --disable-libdirac --enable-libfaac --enable-libmp3lame
--enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-
libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
libxvid --enable-zlib --arch=x86_64 --cpu=i7 --enable-pic --enable-sram
--prefix=/usr/local/x86_64-w64-mingw32 --cross-
prefix=/usr/x86_64-w64-mingw32/bin/ --target-os=mingw32 --pkg-config=pkg-
config --extra-libs='-lorc-0.4 -lx264' --enable-stripping --disable-debug
--enable-w32threads
libavutil 50. 40. 1 / 50. 40. 1
libavcodec 52.119. 0 / 52.119. 0
libavformat 52.106. 0 / 52.106. 0
libavdevice 52. 4. 0 / 52. 4. 0
libavfilter 1. 78. 0 / 1. 78. 0
libswscale 0. 13. 0 / 0. 13. 0
libpostproc 51. 2. 0 / 51. 2. 0
[NULL @ 00000000003CA3A0] Probed with size=2048 and score=100
[yuv4mpegpipe @ 00000000003CA3A0] Probe buffer size limit 5000000 reached
[yuv4mpegpipe @ 00000000003CA3A0] Estimating duration from bitrate, this
may be inaccurate
Input #0, yuv4mpegpipe, from 'Yes-purple-bars.y4m':
Duration: N/A, bitrate: N/A
Stream #0.0, 10, 100/1199: Video: rawvideo, yuv420p, 800x450,
100/1199, PAR 1:1 DAR 16:9, 11.99 fps, 11.99 tbr, 11.99 tbn, 11.99 tbc
At least one output file must be specified
I uploaded the sample files (.y4m.xz) to the upload.
Now I noticed that the error only occurs in Windows, and not in Linux. I
don't know why.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/63>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list