[FFmpeg-devel] [PATCH] lavc: remove imx_dump_header bitstream filter

Lou Logan lou at lrcd.com
Wed Jun 11 00:01:18 CEST 2014

On Tue, 10 Jun 2014 20:57:18 +0000, Gaullier Nicolas wrote:

> I strongly suggest not to remove this filter. The fact is that FCP,
> omneon, FFMBC among them or others do handle IMX differently that
> MPEG2. I am not able to say why, maybe it was some time ago only for
> FCP compatibility to identify IMX because FCP was indeed not able to
> decode regular MPEG2. But anyway, at the end, this had become a
> standard. The fact that some systems today are agile, flexible,
> robust and are able to read MOV IMX where the "IMX header" is missing
> in the mdat, is certainly a good thing, but I think they will all
> continue to write files the same way, without breaking
> compatibility : there are anyway many legacy systems around, and many
> archives in MOV IMX that are to stay consistent.
> Nicolas

Thanks for the reply. I didn't actually expect to push this commit, so
you can consider it dropped, but I thought I'd throw it out there as an
alternative to my imxdump documentation patch and as a probe to see if
anyone uses this bitstream filter.

Do you know any versions of FCP that do benefit from this bsf?

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