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Hierdie gesprek is in die argief. Vra asseblief 'n nuwe vraag as jy hulp nodig het.

"Parse MP4 metadata failed" error when trying to play certain MP4 files

  • 6 antwoorde
  • 1 het hierdie probleem
  • 10 views
  • Laaste antwoord deur cor-el

Chris
Chris
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The file (link here) plays in Chrome and VLC but not Windows 10 Firefox or Ubuntu 18 Firefox.

I've analyzed it with FFmpeg, AtomicParsley, and other tools and have found nothing wrong with the file. I compiled Firefox nightly from source and it gave the same error as my Windows 10 install. Screenshot of the full error message attached.

The file ([https://rocdevdata.blob.core.windows.net/firefox/B0C55431BD50-evtid-5EBEE83A-5EBEE858.mp4 link here]) plays in Chrome and VLC but not Windows 10 Firefox or Ubuntu 18 Firefox. I've analyzed it with FFmpeg, AtomicParsley, and other tools and have found nothing wrong with the file. I compiled Firefox nightly from source and it gave the same error as my Windows 10 install. Screenshot of the full error message attached.
Aangehegde skermkiekies

All Replies (6)

TyDraniu
TyDraniu
  • Top 25 Contributor
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It looks like the extension of this file is wrong. It's not MPEG-4 but QuickTime and we can't play it.

Chris
Chris Vraag-eienaar
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Here is a second file produced by the same software that created the first file, using a different camera source. Firefox is able to play the video in this file even though it's the same container format as the first file. I understand MP4 doesn't support the PCMU audio in this second file which is why there is no sound.

But since Firefox's MP4 demuxer can parse the video contents of the second file, what's wrong with the first file if anything?

TyDraniu
TyDraniu
  • Top 25 Contributor
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Now I'm stupid.

Chris
Chris Vraag-eienaar
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Do you recommend I file a bug ticket?

TyDraniu
TyDraniu
  • Top 25 Contributor
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Perhaps it's a good idea.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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VLC shows a difference in the decoded format:

  • first mp4: Decoded format: Planar 4:2:0 YUV full scale
  • second mp4: Decoded format: Planar 4:2:0 YUV