Hi, I am trying to understand mp4 file and ts demuxing/decoding and has following doubts.Please help me clarify.
Hi, i have the following doubts in ffmpeg.Please clarify 1.I am reading mp4 file using ffmpeg and after doing av_read_frame i am getting video(stream_index = 0),audio(stream_index = 1) packets First there is no order of coming of video/audio packets.Is it the standard case. 2.Video pgackets are coming of various sizes from the minimum of 14 to the maximum of 21824.Please point why the video packet size varies,somewhere it is written that for video one packet means one frame,so if for video pkt->size = 14 also equals one frame of video.(pkt is of type AVPacket). 3.If we demux the incoming mp4 stream in Probe function while parsing it and store the info in some buffer or calling av_read_frame demuxes it. 4.Is it possible in ffmpeg to demux the mp4 file and then assign both a/v in one stream of packets where video packet has stream_index = 1,and for audio = 0. or it has to be in separate stream. 5.Diff between ffmpeg processing for transport stream and mp4 file. if both are demuxed,decoded in same way or is it different. 6.Please point me any example to add subtitle to the mp4 file in ffmpeg. Regards Mayank
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