id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
9304	Support strange / multiple editlists without -ignore_editlist 1	Zack Bloom		"Summary of the bug: A working video file becomes invalid after a simple copy

How to reproduce:
{{{
% ffmpeg -i broken-example.mp4 -c:v copy out.mp4
ffmpeg version N-102791-gaca923b365
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
}}}

You can obtain broken-example.mp4 (3.5MB) here: https://www.dropbox.com/s/tky9p7jmoe8tx4z/broken-example.mp4?dl=1

This began as much more complex failed encoding operation, but this test case is so trivial I believe it will be easier to debug. This input is successfully playable using Quicktime on OSX (although it can't be played with some other players). 

What you observe is it begins with a normal video clip, followed by what seems like a slideshow frame. My guess is it is using a variable frame rate to deliver the final slideshow image, but I am unsure how to determine this using ffprobe.

After the encoding the file returned by ffmpeg appears corrupt where the 'slideshow' frame began, approx 9 seconds into the original clip.

For anyone who does not have a Mac with Quicktime, I have prepared a screen recording of the successful playback of the original video here: https://www.dropbox.com/s/qs5ssk8832s5dek/example-playback.mp4?dl=1

I have no doubt the input video file is broken in some way, but I would still like for ffmpeg to be able to operate with it if possible. Thank you for all the work you do to create this incredibly powerful tool."	defect	open	normal	avformat	git-master		mov	Zack Bloom			1	0