ffmpeg 转换x264到Fragmented MP4

ffmpeg -re -i d:\test.264 -g 52 -acodec libvo_aacenc -ab 64k -vcodec libx264 -vb 448k -f mp4 -movflags frag_keyframe+empty_moov d:\output.mp4

D:\ffmpeg\bin>ffmpeg -i d:\test.264 -g 52 -vcodec copy -f mp4 -movflags frag_keyframe+empty_moov d:\output.mp4

• frag_keyframe 导致碎片输出，
• empty_moov将导致输出100％分段; 没有这个，第一个片段将被多路复用为短片（使用moov），其后是片段中的其余媒体，
• -re 在实时流传输（在媒体比特率上输出）时很有用，如果您正在创建文件，不要使用它，
• -g 52 强制（至少）每第52帧作为关键帧

ismv muxer AVOptions:
-movflags           E.... MOV muxer flags
   rtphint                 E.... Add RTP hint tracks
   empty_moov              E.... Make the initial moov atom empty (not supported by QuickTime)
   frag_keyframe           E.... Fragment at video keyframes
   separate_moof           E.... Write separate moof/mdat atoms for each track
   frag_custom             E.... Flush fragments on caller requests
   isml                    E.... Create a live smooth streaming feed (for pushing to a publishing point)
-moov_size            E.... maximum moov size so it can be placed at the begin
-rtpflags           E.... RTP muxer flags
   latm                    E.... Use MP4A-LATM packetization instead of MPEG4-GENERIC for AAC
   rfc2190                 E.... Use RFC 2190 packetization instead of RFC 4629 for H.263
   skip_rtcp               E.... Don't send RTCP sender reports
-skip_iods            E.... Skip writing iods atom.
-iods_audio_profile   E.... iods audio profile atom.
-iods_video_profile   E.... iods video profile atom.
-frag_duration        E.... Maximum fragment duration
-min_frag_duration    E.... Minimum fragment duration
-frag_size            E.... Maximum fragment size
-ism_lookahead        E.... Number of lookahead entries for ISM files