Hi,
I'm far from an ffmpeg expert, but have been able to piece together a command
that takes a series of TIFF images (actually geotiffs). Recently I updated my
software that generates the TIFF images to use internal tiling versus the
striped structure it was using before. I've noticed that my ffmpeg command no
longer works and although I don't see an error message I get an all black video
as a result. I'm not sure if this is a bug or if there is some flag I need to
handle this or if maybe there is some compile flag to include full TIFF support
so I'm hoping someone on here can give me some guidance. Here's the command I'm
running:
ffmpeg -y -framerate 24 -i gtiff2mp4_tmp/%03d.tif -c:v libx264 -crf 25 -vf
'format=yuv420p,scale=trunc(iw/2)*2:trunc(ih/2)*2' test.mp4
The top of the ffmpeg output looks like:
ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 10.3.0 (GCC)
configuration:
--prefix=/home/conda/feedstock_root/build_artifacts/ffmpeg_1649114005999/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac
--cc=/home/conda/feedstock_root/build_artifacts/ffmpeg_1649114005999/_build_env/bin/x86_64-conda-linux-gnu-cc
--disable-doc --disable-openssl --enable-demuxer=dash --enable-gnutls
--enable-gpl --enable-hardcoded-tables --enable-libfreetype
--enable-libopenh264 --enable-vaapi --enable-libx264 --enable-libx265
--enable-libaom --enable-libsvtav1 --enable-libxml2 --enable-libvpx
--enable-pic --enable-pthreads --enable-shared --disable-static
--enable-version3 --enable-zlib --enable-libmp3lame
--pkg-config=/home/conda/feedstock_root/build_artifacts/ffmpeg_1649114005999/_build_env/bin/pkg-config
libavutil 57. 17.100 / 57. 17.100
libavcodec 59. 18.100 / 59. 18.100
libavformat 59. 16.100 / 59. 16.100
libavdevice 59. 4.100 / 59. 4.100
libavfilter 8. 24.100 / 8. 24.100
libswscale 6. 4.100 / 6. 4.100
libswresample 4. 3.100 / 4. 3.100
libpostproc 56. 3.100 / 56. 3.100
Input #0, image2, from 'gtiff2mp4_tmp/%03d.tif':
Duration: 00:00:02.46, start: 0.000000, bitrate: N/A
Stream #0:0: Video: tiff, ya8, 500x500, 24 fps, 24 tbr, 24 tbn
The version of ffmpeg I'm using is built as part of the conda-forge project
(https://github.com/conda-forge/ffmpeg-feedstock/tree/main/recipe) and I've seen these
same results with 5.x and 4.x versions. If I run "tiffinfo" on the first
geotiff image I get this information:
=== TIFF directory 0 ===
TIFF Directory at offset 0x8 (8)
Image Width: 500 Image Length: 500
Tile Width: 256 Tile Length: 256
Bits/Sample: 8
Sample Format: unsigned integer
Compression Scheme: LZW
Photometric Interpretation: min-is-black
Extra Samples: 1<unassoc-alpha>
Samples/Pixel: 2
Planar Configuration: single image plane
I noticed mention of "is_tiled" in this tiff source file in ffmpeg:
https://ffmpeg.org/doxygen/trunk/tiff_8c_source.html
Does anyone have an idea if I'm doing something wrong? Like I said, if I switch
from tiled to striped TIFF files then it works fine.
Dave
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