#10933: Command line argument -ss 0 for .jpeg producing to ouput
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Reporter: Jozef Chutka | Type: defect
Status: new | Priority: normal
Component: undetermined | Version: 6.1
Keywords: mjpeg | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Using ffmpeg 6.1.1, the following command produces no output:
{{{
ffmpeg -ss 0 -i img.jpg -y tmp.jpeg
}}}
{{{
ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
built with Apple clang version 15.0.0 (clang-1500.1.0.2.5)
configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.1.1_4 --enable-
shared --enable-pthreads --enable-version3 --cc=clang --host-cflags=
--host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-
gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-
libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame
--enable-libopus --enable-librav1e --enable-librist --enable-librubberband
--enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1
--enable-libtesseract --enable-libtheora --enable-libvidstab --enable-
libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-
libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma
--enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-
libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
libopenjpeg --enable-libopenvino --enable-libspeex --enable-libsoxr
--enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
--enable-videotoolbox --enable-audiotoolbox --enable-neon
libavutil 58. 29.100 / 58. 29.100
libavcodec 60. 31.102 / 60. 31.102
libavformat 60. 16.100 / 60. 16.100
libavdevice 60. 3.100 / 60. 3.100
libavfilter 9. 12.100 / 9. 12.100
libswscale 7. 5.100 / 7. 5.100
libswresample 4. 12.100 / 4. 12.100
libpostproc 57. 3.100 / 57. 3.100
Input #0, image2, from 'img.jpg':
Duration: 00:00:00.04, start: 0.000000, bitrate: 885 kb/s
Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc,
bt470bg/unknown/unknown), 128x85 [SAR 72:72 DAR 128:85], 25 fps, 25 tbr,
25 tbn
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[vost#0:0/mjpeg @ 0x147904c90] No filtered frames for output stream,
trying to initialize anyway.
Output #0, image2, to 'tmp.jpeg':
Metadata:
encoder : Lavf60.16.100
Stream #0:0: Video: mjpeg, yuvj420p(pc, progressive), 128x85 [SAR 72:72
DAR 128:85], q=2-31, 200 kb/s, 25 fps, 25 tbn
Metadata:
encoder : Lavc60.31.102 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
[out#0/image2 @ 0x147904080] video:0kB audio:0kB subtitle:0kB other
streams:0kB global headers:0kB muxing overhead: unknown
[out#0/image2 @ 0x147904080] Output file is empty, nothing was
encoded(check -ss / -t / -frames parameters if used)
frame= 0 fps=0.0 q=0.0 Lsize=N/A time=N/A bitrate=N/A speed=N/A
}}}
The problem seems to be the `-ss 0` argument.
Following commands however work and produces the expected output:
{{{
ffmpeg -i img.jpg -y tmp.jpeg # no -ss
ffmpeg -ss 0 -f image2 -i img.jpg -y tmp.jpeg # explicit format
ffmpeg -ss 0 -f jpeg_pipe -i img.jpg -y tmp.jpeg # explicit format
ffmpeg -ss 0 -i img.webp -y tmp.jpeg # webp input
ffmpeg -ss 0 -i img.png -y tmp.jpeg # png input
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10933>
FFmpeg <https://ffmpeg.org>
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