[FFmpeg-user] Fifo muxer with ISMV output results in corrupted video

Gyan Doshi ffmpeg at gyani.pro
Thu Jun 25 15:35:22 EEST 2020

On 25-06-2020 05:17 pm, Louis Geuten wrote:
> Hello,
> It seems that using the argument "-flags +global_header" with the bitstream
> filter "dump_extra" fixes the issue.
> Why this isn't needed when directly muxing with ISMV instead of fifo is
> beyond me.

Each muxer has a list of flags; those relevant to encoders are conveyed 
by ffmpeg to that encoder.

The fifo muxer isn't a muxer per-se but an intermediary layer dressed up 
as a muxer. It won't necessarily share the relevant flags with the child 
muxer, so they have to be manually set by the user.


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