[FFmpeg-devel] [PATCH]Support more AVC-Intra files
tomas.hardin at codemill.se
Fri Sep 28 09:11:51 CEST 2012
On Thu, 2012-09-27 at 21:57 +0200, Reimar Döffinger wrote:
> On 27 Sep 2012, at 21:23, Tomas Härdin <tomas.hardin at codemill.se> wrote:
> > Have you tested that these files still work in say FCP7 after being
> > remuxed to MOV? It might be necessary to strip SPS/PPS when muxing
> > AVC-Intra.
> I am quite sure neither I nor Carl have FCP (whatever version) at hand, so I am afraid we acn't test that. The person reporting the bug may or may not be able to (though I had the impression he only has to do with MXF AVC-Intra).
Actually, I have access to both FCP7 and FCPX but I'm rather busy.
Luckily Robert offered to test. I have a sneaking suspicion lavf's MOV
output doesn't work well with either version to begin with, but I
haven't checked closely.
Oh yeah, I need to be a bit more specific: these files already have
SPS/PPS stripped, so it may rather be a case of avcC or glbl not being
supposed to be written. Furthermore, AVC-Intra *with* SPS/PPS in the
video essence may need to be stripped as well.
I suspect this mess is due to Avid or Apple going "well, if we put
SPS/PPS in the first packet the file is no longer CBR, and it'll go
missing if we cut the video, so we'd better strip them anyway" instead
of "let's just add SPS/PPS to all packets".
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