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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
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The Ultimate List of Alternatives to Google Products
2 août 2022, par Erin — Privacy -
Anyway to play/convert/fix 10mb-50mb avi files that ffprobe shows has duration 0.0000 ?
7 janvier 2016, par shaunRun into a problem at work, we are getting some of the AVI files being secure ftp to our servers straight from our hardware creating the AVI files are not playing.
In doing some research using ffprobe we have found that even though there is data in the files (10mb-80mb+ file sizes) the header is showing a duration of 0.
We have tried using both MEncoder and FFMPEG to try and re-encode/convert/fix the files, but both stop almost immediately saying the fps is nan. Nothing seems to be working.
Can anyone give us some ideas on how to fix the files ?
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How to set individual image display durations with ffmpeg-python
20 septembre 2022, par tompiI am using ffmpeg-python 0.2.0 with Python 3.10.0. Displaying videos in VLC 3.0.17.4.


I am making an animation from a set of images. Each image is displayed for different amount of time.


I have the basics in place with inputting images and concatenating streams, but I can't figure out how to correctly set frame duration.


Consider the following example :


stream1 = ffmpeg.input(image1_file)
stream2 = ffmpeg.input(image2_file)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file)
ffmpeg.run(output_stream)



With this I get a video with duration of a split second that barely shows an image before ending. Which is to be expected with two individual frames.


For this example, my goal is to have a video of 5 seconds total duration, showing the image in stream1 for 2 seconds and the image in stream2 for 3 seconds.


Attempt 1 : Setting
t
for inputs

stream1 = ffmpeg.input(image1_file, t=2)
stream2 = ffmpeg.input(image2_file, t=3)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file)
ffmpeg.run(output_stream)



With this, I get a video with the duration of a split second and no image displayed.


Attempt 2 : Setting
frames
for inputs

stream1 = ffmpeg.input(image1_file, frames=48)
stream2 = ffmpeg.input(image2_file, frames=72)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file, r=24)
ffmpeg.run(output_stream)



In this case, I get the following error from ffmpeg :


Option frames (set the number of frames to output) cannot be applied to input url ########## -- you are trying to apply an input option to an output file or vice versa. Move this option before the file it belongs to.



I can't tell if this is a bug in ffmpeg-python or if I did it wrong.


Attempt 3 : Setting
framerate
for inputs

stream1 = ffmpeg.input(image1_file, framerate=1/2)
stream2 = ffmpeg.input(image2_file, framerate=1/3)
combined_streams = ffmpeg.concat(stream1, stream2)
output_stream = ffmpeg.output(combined_streams, output_file)
ffmpeg.run(output_stream)



With this, I get a video with the duration of a split second and no image displayed. However, when I set both framerate values to 1/2, I get an animation of 4 seconds duration that displays the first image for two seconds and the second image for two seconds. This is the closest I got to a functional solution, but it is not quite there.


I am aware that multiple images can be globbed by input, but that would apply the same duration setting to all images, and my images each have different durations, so I am looking for a different solution.


Any ideas for how to get ffmpeg-python to do the thing is much appreciated.