Hello,

You should also post the full output of ffmpeg and the full command used
to invoke it minus any personal info. E.G. :
% ffmpeg -i FILE.mp4 -c:v mediainfo -b:v 1M OUT.mp4
...
Encoded X frames in Y seconds...
%

Cheers

On Sat, 17 Oct 2026 13:43:32 +0200
Timo Rothenpieler via ffmpeg-user <[email protected]> wrote:
> On 17/10/2026 08:23, Yusuf Sultan via ffmpeg-user wrote:
> > I think I was using v8.1.1 at the time I found this bug, I see v9 is
> > out though so maybe I should try again with that...  
> 
> Please try latest master anytime you want to reproduce and report an
> issue. If it works there, you can then check your preferred old
> version, and if it's broken, ask for a backport.
> 
> > On Thursday, October 15th, 2026 at 6:07 PM, Timo Rothenpieler via
> > ffmpeg-user <[email protected]> wrote: 
> >> On 15/10/2026 12:24, Yusuf Sultan via ffmpeg-user wrote:  
> >>> Hello,
> >>>
> >>> I am trying to use FFmpeg on Android to encode videos, and whenever
> >>> the output video codec is "h264_mediacodec" or "hevc_mediacodec",
> >>> then I get corrupt MP4 files that don't play at all on some
> >>> players, play with black screen on some, and for some it plays with
> >>> lag/jitter or takes few seconds before video shows up.
> >>>
> >>> I was wondering if this is a known issue, or that I should file a
> >>> bug report?  
> >> Have you tried this with latest master, or some older FFmpeg version?
> >> The MediaCodec stuff had some fixes there lately.
> >>
> >>
> >> Timo

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