Matroska video format

Eduardo Morras emorrasg at
Thu May 26 08:57:25 UTC 2016

On Wed, 25 May 2016 17:26:18 -0400
Baho Utot <baho-utot at> wrote:

> I think my issue has something to do with this:
> [swscaler @ 0x81604d000] Warning: data is not aligned! This can lead
> to a speedloss
> Anyway I have rebuilt ffmpeg and enabled SDL, it plays but with the 
> above error

Then the codec used had a bug, it happened on some devices with buggy firmware and it's hard to update them. Above error is the warning or the grey frames?.

a) If ffplay can play it well/correctly ffmpeg can transcode it without major issues.

b) If it's the grey frames, don't know how to fix it, sorry.

Some blindshoots with vlc:

c1) In vlc, go to ctrl+P 'preferences', select 'all settings' (bottom left), 'input/codecs', 'video codecs', 'ffmpeg', 'error resilience' set it to 4
c2) In vlc, go to ctrl+P 'preferences', select 'all settings', 'input/codecs', 'video codecs', 'ffmpeg', 'workaround bugs', try with values 2, 16 and 18

Also, with ctrl+M and setting to 1 or 2 the verbosity level you can see what vlc is doing and why.


>   Thanks

---   ---
Eduardo Morras <emorrasg at>

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