Transcoding gives unplayable file, but not always.

[virtualpaul]

Summary of the bug:
Trans-coding video.ts (from OTA recording) to video.mp4 works most of the time but it does not always work.

When it does not work, I checked that the video.ts plays fine but the resulting video.mp4 won't play in either VLC or Windows media player.

In VLC, I got this error:

avcodec error: Could not open video.mp4: Unknown error

In WMP:

Windows Media Player encountered a problem while playing the file.

Perhaps a setting I am using is incompatible with another setting?

Not sure if it is related but it seems to happen mostly on larger files (movies) and not on smaller files (episodes).
So I cannot really upload a small file for you to check.

I tried cutting down a large file but ffmpeg returns this error:
[... @ ] moov atom not found video.mp4: invalid data found when processing input

How to reproduce:

"\ffmpeg-3.4.2-win64-static\bin\ffmpeg.exe" -i video.ts -i video_meta.txt -map_metadata 1 -vcodec libx264 -profile:v high -level:v 4.1 -crf 18 video.mp4

ffmpeg version 3.4.2 windows 64 bit

[Carl Eugen Hoyos]

To make this a valid ticket, please test current FFmpeg git head and provide the command line that allows to reproduce the issue together with the complete, uncut console output.
Do not try to provide an output file, instead please upload an input file to your favourite file hoster.

[Carl Eugen Hoyos]

Please test current FFmpeg git head and provide the command line that allows to reproduce the issue together with the complete, uncut console output to make this a valid ticket.

[virtualpaul]

Ok the new ffmpeg fixes some problems. I will try to upload another one when I see the problem again.

[Carl Eugen Hoyos]

Please reopen this ticket if you can explain how we can reproduce the issue.