Addition of the pic_timing as an SEI message as per h264 ISO-IEC14496-10. It can be embedded as an additional NAL unit before any NAL coded slice. Extracting the H264 bitstream to a file I can write my own parser for it to extract SPS/PPS etc and add a NAL unit. I know x264 adds SEI User messages as it adds system encoder information, I was wondering if there was anyway to access the same units using the avcodec parsing routines?
I haven't looked at the SMPTE 12M - might work. Is there a way to add it? Lance On Fri, Jun 25, 2021 at 11:23 AM Brad Hards <br...@frogmouth.net> wrote: > On Friday, 25 June 2021 8:18:22 PM AEST you wrote: > > > On Friday, 25 June 2021 6:00:24 PM AEST Alan Johnson wrote: > > > > Is there anyway to add a h264 NAL (SEI Timecode) unit to an existing > > >>stream > > > > > > > without access libavcodec source (i.e. only linking against the DLL)? > > > > > > I don't think so. > > > > > > AFAICT, the H.264 encoders don't support SEI writing in any released > > > version. It should work in nvenc as of the next release. Others are a > work > > > in progress. > > Ah, maybe I was too fast. What timecode do you want? SMPTE 12M should work > in at least nvenc and x264. > > What have you tried? > > Brad > > _______________________________________________ > Libav-user mailing list > Libav-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > libav-user-requ...@ffmpeg.org with subject "unsubscribe". >
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