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mkvmerge MPEG-2 video in MP4 written with invalid CodecID V_MPEG70 #1995

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cementboy opened this Issue May 24, 2017 · 3 comments

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@cementboy

cementboy commented May 24, 2017

Hello,

I used mkvmerge 12.0.0 on an MP4-contained video file. The input file plays perfectly well with VLC media player. The video codec of the input file is MPEG-2.

After muxing to Matroska using mkvmerge, the resulting output file does not display video and plays as audio only. The video format for the output file is 'V_MPEG70'.

This behaviour is reproducible with both mkvmerge gui and cli on Ubuntu 16.04. As a workaround, I am using ffmpeg (ffmpeg -i 01.mp4 -map 0 -c copy 01.mkv) to ensure that everything displays correctly. Interestingly, this only occurs with MPEG-2 in an MP4 container; muxing MKV to MKV works fine.

I've attached a short portion of the MP4 input file for reference.

Thanks.

01.zip

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mbunkus May 25, 2017

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Thanks. I'll look into it, but it'll take a while as I'll be away for several weeks.

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mbunkus commented May 25, 2017

Thanks. I'll look into it, but it'll take a while as I'll be away for several weeks.

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mbunkus May 25, 2017

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Oh, I can reproduce the issue with the same you've provided. So I shouldn't need anything else for analysis.

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mbunkus commented May 25, 2017

Oh, I can reproduce the issue with the same you've provided. So I shouldn't need anything else for analysis.

@mbunkus mbunkus changed the title from mkvmerge MPEG-2 video codec modification? to mkvmerge MPEG-2 video in MP4 written with invalid CodecID V_MPEG70 May 25, 2017

@mbunkus mbunkus closed this in e6fcdfe Jun 18, 2017

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remuxer32 Jun 19, 2017

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New pre-builds for Windows that contain the fix have been uploaded here:

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remuxer32 commented Jun 19, 2017

New pre-builds for Windows that contain the fix have been uploaded here:

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