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FFMPEG Inverts colors when converting tiff pictures to png
1er juin 2021, par Mounia JaitiWe need to convert thousands of tiff pictures to png. To accomplish that we are using FFMPEG. We've noticed recently that for very few of the converted files (in png), the colors are inverted : the input tiff file is all black and white (a technical drawing in black with a white background), and the output png file is white and black (the drawing becomes white and the background becomes black). Of course we don't want that, we need the colors to stay the same.


Here is the command we are using :


ffmpeg -y -v warning -i in_file.tif out_file.png


We've tested the 'negate' parameter on those files, and the pictures are correctly converted. But we can't apply this parameter to all of the input tiff files.
Here is the command with the negate parameter :


ffmpeg -y -v verbose -i input.tif -vf negate output.png


The Code Java we're using :


String ffmpegPath="/Users/user11/ffmpeg//ffmpeg";
 List<string> commandArgs = new ArrayList<string>();
 commandArgs.add(ffmpegPath);
 //overwrite output file if it exists
 commandArgs.add("-y"); 
 commandArgs.add("-v");
 commandArgs.add("verbose");
 //set input file 
 commandArgs.add("-i"); 
 commandArgs.add(picture.getAbsolutePath());
 commandArgs.add(dest.getAbsolutePath());
 
 String cmd = "";
 for(String cmdArg : commandArgs) {
 cmd += cmdArg + " ";
 }


</string></string>

Logs for tif having the bug :



31, 2021 2:15:51 PM 
INFO: Executing : /Users/user11/ffmpeg/ffmpeg -y -v verbose -i /Users/user11/ffmpeg/input.tif /Users/user11/ffmpeg/output.png 
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: ffmpeg version 4.4-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2021 the FFmpeg developers
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: built with Apple clang version 11.0.0 (clang-1100.0.33.17)
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libavutil 56. 70.100 / 56. 70.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libavcodec 58.134.100 / 58.134.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libavformat 58. 76.100 / 58. 76.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libavdevice 58. 13.100 / 58. 13.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libavfilter 7.110.100 / 7.110.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libswscale 5. 9.100 / 5. 9.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libswresample 3. 9.100 / 3. 9.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: libpostproc 55. 9.100 / 55. 9.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: [tiff_pipe @ 0x7fa7f6008200] parser not found for codec tiff, packets or times may be invalid.
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Last message repeated 1 times
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Input #0, tiff_pipe, from '/Users/user11/ffmpeg/input.tif':
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Duration: N/A, bitrate: N/A
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Stream #0:0: Video: tiff, 1 reference frame, monob, 2008x2481 [SAR 1:1 DAR 2008:2481], 25 fps, 25 tbr, 25 tbn, 25 tbc
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Stream mapping:
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Stream #0:0 -> #0:0 (tiff (native) -> png (native))
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Press [q] to stop, [?] for help
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: [graph 0 input from stream 0:0 @ 0x7fa7f4c08300] w:2008 h:2481 pixfmt:monob tb:1/25 fr:25/1 sar:1/1
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Output #0, image2, to '/Users/user11/ffmpeg/output.png':
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Metadata:
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: encoder : Lavf58.76.100
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Stream #0:0: Video: png, 1 reference frame, monob(progressive), 2008x2481 (0x0) [SAR 1:1 DAR 2008:2481], q=2-31, 200 kb/s, 25 fps, 25 tbn
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Metadata:
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: encoder : Lavc58.134.100 png
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: frame= 1 fps=0.0 q=0.0 size=N/A time=00:00:00.00 bitrate=N/A speed= 0x 
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: No more output streams to write to, finishing.
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: [AVIOContext @ 0x7fa7f4c14180] Statistics: 0 seeks, 1 writeouts
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=1.31x 
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: video:37kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Input file #0 (/Users/user11/ffmpeg/input.tif):
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Input stream #0:0 (video): 1 packets read (18100 bytes); 1 frames decoded; 
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Total: 1 packets (18100 bytes) demuxed
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Output file #0 (/Users/user11/ffmpeg/output.png):
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Output stream #0:0 (video): 1 frames encoded; 1 packets muxed (38013 bytes); 
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: Total: 1 packets (38013 bytes) muxed
May 31, 2021 2:15:51 PM 
INFO: ReencodePicture output: [AVIOContext @ 0x7fa7f4f041c0] Statistics: 18100 bytes read, 0 seeks
May 31, 2021 2:15:51 PM 
INFO: BinaryRepositoryHelper.convertPixTo ffmpeg Process returned : java.lang.UNIXProcess@27ddd392, ended with code 0, and returned in 160 ms, out=/Users/user11/ffmpeg/output.png exists=true







So our questions are :


- 

- Is there a way to identify the tiff files that will be converted to png with inverted colors ? So that we can know to which files the 'negate' parameter must be applied.
- Are there any other FFMPEG parameter that we can use.






This issue has been driving us mad for the last couple of days. Any help would be highly appreciated.
Thanks.


Example of Tif picture


https://drive.google.com/file/d/1U1a91gTk1gaJb-XAPavNq6UhmjWXZjbM/view?usp=sharing


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How to concatenate multiple videos [closed]
23 mai 2021, par Chand HernanI am new to the programming world and I am trying to make a program to automate parte of my work


I need to join multiple mp4 videos, I have tried to use moviepy but it takes a long time to export. They also recommended me to use ffmpeg but I could not


There are 5 videos, and in total it gives a video of 9 minutes in high quality. I would like to lower the quality to be able to make the process faster


An apology if my translation is not entirely correct


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ffmpeg - when merging an image and audio, audio gets shortened
25 août 2014, par GaryI am trying to merge a png image with 11 seconds of audio and create an mp4 file. When I execute ffmpeg I end up with a total duration of 10 seconds for the mp4 file. The command I’m using is...
ffmpeg -r 6 -loop 1 -i "image1.png" -i "audio1.wav" out.mp4UPDATE : Here is the log that is produced...
FFmpeg version SVN-r15986, Copyright (c) 2000-2008 Fabrice Bellard, et al.
configuration: --extra-cflags=-fno-common --enable-memalign-hack --enable-pthr
eads --enable-libmp3lame --enable-libxvid --enable-libvorbis --enable-libtheora
--enable-libspeex --enable-libfaac --enable-libgsm --enable-libx264 --enable-lib
schroedinger --enable-avisynth --enable-swscale --enable-gpl
libavutil 49.12. 0 / 49.12. 0
libavcodec 52. 6. 0 / 52. 6. 0
libavformat 52.23. 1 / 52.23. 1
libavdevice 52. 1. 0 / 52. 1. 0
libswscale 0. 6. 1 / 0. 6. 1
built on Dec 3 2008 01:59:37, gcc: 4.2.4
Input #0, image2, from 'image1.png':
Duration: 00:00:00.16, start: 0.000000, bitrate: N/A
Stream #0.0: Video: png, rgb32, 400x300, 6.00 tb(r)
Input #1, wav, from 'audio1.wav':
Duration: 00:00:11.07, bitrate: 88 kb/s
Stream #1.0: Audio: pcm_u8, 11025 Hz, mono, s16, 88 kb/s
File 'out.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'out.mp4':
Stream #0.0: Video: mpeg4, yuv420p, 400x300, q=2-31, 200 kb/s, 6.00 tb(c)
Stream #0.1: Audio: libfaac, 11025 Hz, mono, s16, 64 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #1.0 -> #0.1
Press [q] to stop encoding
frame= 1 fps= 0 q=4.1 Lsize= 42kB time=0.17 bitrate=2063.7kbits/s
video:14kB audio:26kB global headers:0.kB muxing overhead 4.894235%I have also tried using
ffmpeg -loop 1 -i "image1.png" -i "audio1.wav" -t 11 out.mp4This command does create an mp4 of 11 seconds but the audio is still cut off at 10 seconds.
Why is the audio being cutoff at 10 seconds ?
Thanks,
Gary
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