On Sun, Aug 12, 2018 at 12:42 PM tugouxp <13824125...@163.com> wrote: > > hi all: > i add log print in function "h264_decode_frame" in order to get the start > code infomation of the input packet bitstream, > and the log is below. but the result is not expected, for the doucument says > each packet should be start with start code "00 00 01" or "00 00 00 01", > > if so, why the ffmpeg did not report any error messages to terminal? is > there any mistake of my understanding? > > thanks for your kindly support. hi all: > i add log print in function "h264_decode_frame" in order to get the start > code infomation of the input packet bitstream, > and the log is below. but the result is not expected, for the doucument says > each packet should be start with start code "00 00 01" or "00 00 00 01", > > if so, why the ffmpeg did not report any error messages to terminal? is > there any mistake of my understanding? >
H264 can exist in two formats, either AnnexB with the start code you mention, or in MP4 format with a length prefix, but not the start code you are looking for. MP4 format is used in MP4/MKV and a variety of other containers, while AnnexB is often found in raw files and MPEG-TS and its derived formats. - Hendrik _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
