On Tue, Dec 25, 2012 at 11:08 AM, Brian Chi <[email protected]> wrote: > I tracked the ffmpeg code and found that in the function > "av_write_frame->mov_write_packet->ff_mov_write_packet", it will call > function "ff_avc_parse_nal_units" to obtain the size of nal unit, but the > return value is very small(such as 208 bytes).
It's very natural for the first NAL unit to be small. An h264 stream begins with configuration SPS/PPS untis that don't contain video data, but let the decoder initialization to work. Did you continue reading more video packets after the first one? Alex _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
