1

ffmpeg can convert sequences of images to movies and is capable of producing lossless output. Is it possible to directly produce a movie from a multi-page tiff file? If I try one of my multipage tiffs ffmpeg only processes the first frame.

Community
  • 1
Marius
  • 121
  • 1
  • 5

2 Answers2

3

Workaround

FFmpeg does not support multipage tiff yet, even in 2021! In the actual FFmpeg feature ticket, I found a workaround: use convert (from ImageMagick) to pipe individual images to FFmpeg.
Ref: https://trac.ffmpeg.org/ticket/8644

In my case, the file format is gray16le (16bits grayscale LE, from a thermal IR camera):

convert sample.tif gray:- | ffmpeg -f rawvideo -s 1280x1024 -pix_fmt gray16le -r 30 -i - -vcodec ffv1 sample-ffv1.mkv

The ffv1 is a lossless format, but it is still compressed. In my case it was about 30% of the original size.

I used the -r 30 to set the output framerate.

Note

Some may wonder why we need lossless 16bit format: I needed to simulate a 16bit grayscale V4L source using V4L-loopback:

ffmpeg -stream_loop -1 -re -i sample-ffv1.mkv -map 0:v -f v4l2 /dev/video0
ForeverLearning
  • 131
1

What about this trick. It will create a stream process that receives image binaries from a tiff file:

import subprocess
from PIL import Image
import numpy as np

Define the input TIFF file and output video file


tiff_file = 'output.tiff'  # Input multi-page TIFF file
video_file = 'output.mp4'   # Output video file


Open the multi-page TIFF file


with Image.open(tiff_file) as img:
    # Prepare the FFmpeg command
    command = [
        'ffmpeg',
        '-y',  # Overwrite output files without asking
        '-f', 'rawvideo',  # Input format
        '-pixel_format', 'rgba',  # Set the pixel format to RGBA
        '-video_size', f'{img.width}x{img.height}',  # Set video size
        '-framerate', '25',  # Set frame rate
        '-i', '-',  # Input from stdin
        '-c:v', 'libx264',  # Video codec
        '-pix_fmt', 'yuv420p',  # Pixel format for compatibility
        video_file
    ]


# Start the FFmpeg process
process = subprocess.Popen(command, stdin=subprocess.PIPE)

# Iterate over each frame in the TIFF
for i in range(img.n_frames):
    img.seek(i)  # Move to the next frame
    # Convert the image to a raw byte array and write to the FFmpeg stdin
    process.stdin.write(img.tobytes())

# Close the input stream and wait for the process to finish
process.stdin.close()
process.wait()




print("Video created successfully!")
Vrtulka23
  • 11