On 11/15/2017 07:49 AM, John Stebbins wrote: > On 11/14/2017 09:07 AM, Carl Eugen Hoyos wrote: >> 2017-11-14 16:07 GMT+01:00 John Stebbins <[email protected]>: >> >>> There are 2 ways defined by the MP4 spec to include SPS and PPS. >>> The first, most common, and supported by ffmpeg, is to put the >>> parameter sets in the MP4 header *only*. In this type of MP4, the >>> sample entry type must be set to avc1. >>> The second way allows the SPS and PPS to be in the MP4 header and >>> inline in the stream. In this case SPS and PPS may be repeated in >>> the stream before each IDR. This is useful for adaptive streaming >>> scenarios where the characteristics of the video stream may change. >>> In this type of MP4, the sample entry type must be avc3. >> I believe this variant is not supported by FFmpeg's mov muxer and I >> suspect that some / most players do not support it. >> >> > I don't know about most, but many do support avc3. The only players I've > found so far that do not are those produced by > Apple. > > A little off topic but related. The default h.265 sample entry type that > ffmpeg writes (hev1) *allows* inline parameter > sets and doesn't work with Apple players. I submitted a patch a while back > to libav which is also in ffmpeg now that > adds the ability to write the hvc1 sample entry type which is supported by > Apple and means parameter sets are only in > the header. > > The attached patch adds the ability to write avc3 sample entry type. I was > planning on submitting this patch to > ffmpeg. Just hadn't gotten around to it yet. > > The ffmpeg command line to transcode a file to avc3 format with this patch > would be: > ffmpeg -i input -flags:v +global_header -c:v libx264 -tag:v avc3 output.mp4 >
And of coarse I got the command line wrong. global header must be disabled. Correct command: ffmpeg -i input -flags:v -global_header -c:v libx264 -tag:v avc3 output.mp4 -- John GnuPG fingerprint: D0EC B3DB C372 D1F1 0B01 83F0 49F1 D7B2 60D4 D0F7
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