Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [X] I looked for a similar issue and couldn't find any.
- [X] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [X] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Detailed guidelines: http://gpac.io/2013/07/16/how-to-file-a-bug-properly/

Sorry for the question, but I just wanted to confirm something.

I'm trying to move an H.265 video from an MKV container to an MP4 container.  When doing this with FFmpeg, it mangles the framerate (changing what was constant to a variable framerate).  For integer framerates, I am able to use `-video_track_timescale 60` to work around this issue with FFmpeg, but it doesn't work with framerates like 59.94.

I am able to successfully do what I need with MP4Box after extracting the video with mkvextract, but, as I often work with files in the hundreds of gigabytes, I wonder if this is possible with one step.  `:fps=x` works fine with the extracted H.265 file, but not with the original MKV.  Just wanted to make sure I wasn't overlooking anything and that extracting the file first with mkvextract is my only option here.

Thanks.
MKV to MP4 Using MP4Box
This is a GitHub Issue
repo:gpac
owner:gpac
Title : MKV to MP4 Using MP4Box
Issue date:

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Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [X] I looked for a similar issue and couldn't find any.
- [X] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [X] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Detailed guidelines: http://gpac.io/2013/07/16/how-to-file-a-bug-properly/

Sorry for the question, but I just wanted to confirm something.

I'm trying to move an H.265 video from an MKV container to an MP4 container.  When doing this with FFmpeg, it mangles the framerate (changing what was constant to a variable framerate).  For integer framerates, I am able to use `-video_track_timescale 60` to work around this issue with FFmpeg, but it doesn't work with framerates like 59.94.

I am able to successfully do what I need with MP4Box after extracting the video with mkvextract, but, as I often work with files in the hundreds of gigabytes, I wonder if this is possible with one step.  `:fps=x` works fine with the extracted H.265 file, but not with the original MKV.  Just wanted to make sure I wasn't overlooking anything and that extracting the file first with mkvextract is my only option here.

Thanks.
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