My apologies for not being clear in my original post. The codec I'm using is h264 and the container is mp4. How can I determine if this codec supports per-frame data? If not, can you give me pointers on how to do it in the bitstream code or on container level?
Thank you in advance ________________________________ Van: Libav-user <libav-user-boun...@ffmpeg.org> namens Nicolas George <geo...@nsup.org> Verzonden: dinsdag 15 februari 2022 19:11 Aan: This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter. <libav-user@ffmpeg.org> Onderwerp: Re: [Libav-user] Custom data in AVPacket or AVFrame Dan Egnor (12022-02-15): > My understanding of the OP was not that they wanted to embed anything in > the bitstream but just that they wanted to set a cookie in AVFrame that > would show up in the corresponding AVPacket (if encoding) or vice versa (if > decoding), hence the suggestion of reordered_opaque. Quite possibly I > misunderstood! Maybe the OP can clarify. The original message has not disappeared, you can re-read it. "add a custom number [] before I encode it and I want to retrieve it back when I decode it." Once FFmpeg has encoded and muxed, it is done with the data, there is no connection to a later decoder. Therefore any transmitted data needs to be in the output file. -- Nicolas George
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