Hello, I have a .mp4 file that I'd like to use in authoring, but
something blows up in the mlt chain which makes it unusable.
First off, here's a link to download all the files to reproduce the
issue along with logs:
https://www.dropbox.com/sh/6hg2gsprf8sp5ze/AAA66Xc7A7ww3pcAk7FNl5uaa
First, the original file testcase.mp4 was generated using VLC recording
a stream. The testcase.mp4 file will run find with VLC and preview
correctly using `melt testcase.mp4` and other video players.
My simple test case in linux using the melt command line is: melt
testcase.mp4 -consumer avformat:transcode-linux.mp4
The file produced is only a bit over 1k and only has blank frames for
the correct duration. The linux.log file is the debug output for this
command.
Now, interesting enough, if I do the exact same test case using qmelt in
windows, the resulting video file will have all the video frames but in
VLC the video will freeze after a few seconds in and it will jump
forward later near the end. The VLC logs indicate frames from several
seconds in the future are trying to be rendered during this frozen bit
of time. The generated video has the same issue in VLC in windows and
linux. The transcoded video does seem to work fine in other video
players, including qmelt command line. The resulting video is named
transocde-win.mp4 in the link and I added a win.log debug output file.
So problem 1. This file cannot be consumed and transcoded correctly at
all using linux. This is less important to me as I have to currently
use windows.
Problem 2. The produced file in windows from this source doesn't work in
one of the most popular video players, VLC, for some reason.
Thanks,
James
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