FFmpeg 실행 중 mpeg4_unpack_bframes to fix 발생시

좀 지난 드라마를 다운받았는데 avi 파일이고 이것을 ffmpeg로 변환하려고

ffmpeg -i *E03* -acodec aac -vcodec libx264 Alone.in.Love.2006.XViD.AC3.E03-WAF.mp4

와 같이 입력해서 실행했더니

ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.3 (crosstool-NG 1.20.0) 20150311 (prerelease)
  configuration: --prefix=/usr --incdir='${prefix}/include/ffmpeg' --arch=i686 --target-os=linux --cross-prefix=/usr/local/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- --enable-cross-compile --enable-optimizations --enable-pic --enable-gpl --enable-shared --disable-static --enable-version3 --enable-nonfree --enable-libfaac --enable-encoders --enable-pthreads --disable-bzlib --disable-protocol=rtp --disable-muxer=image2 --disable-muxer=image2pipe --disable-swscale-alpha --disable-ffserver --disable-ffplay --disable-devices --disable-bzlib --disable-altivec --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --disable-vaapi --disable-decoder=amrnb --disable-decoder=ac3 --disable-decoder=ac3_fixed --disable-encoder=zmbv --disable-encoder=dca --disable-encoder=ac3 --disable-encoder=ac3_fixed --disable-encoder=eac3 --disable-decoder=dca --disable-decoder=eac3 --disable-decoder=truehd --cc=/usr/local/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu-ccache-gcc --enable-yasm --enable-libx264 --enable-encoder=libx264
  libavutil      54. 27.100 / 54. 27.100
  libavcodec     56. 41.100 / 56. 41.100
  libavformat    56. 36.100 / 56. 36.100
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 16.101 /  5. 16.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.100 /  1.  2.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, avi, from 'Alone.in.Love.2006.XViD.AC3.E03-WAF.avi':
  Metadata:
    encoder         : Nandub v1.0rc2
  Duration: 01:09:47.56, start: 0.000000, bitrate: 1404 kb/s
    Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 800x448 [SAR 253:254 DAR 6325:3556], 1202 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, 192 kb/s
[libx264 @ 0x19c6180] using SAR=253/254
[libx264 @ 0x19c6180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x19c6180] profile High, level 3.0
[libx264 @ 0x19c6180] 264 - core 148 r150 820d377 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'Alone.in.Love.2006.XViD.AC3.E03-WAF.mp4':
  Metadata:
    encoder         : Lavf56.36.100
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x448 [SAR 253:254 DAR 6325:3556], q=-1--1, 23.98 fps, 11988 tbn, 23.98 tbc
    Metadata:
      encoder         : Lavc56.41.100 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[mpeg4 @ 0x1eb2760] Video uses a non-standard and wasteful way to store B-frames ('packed B-frames'). Consider using the mpeg4_unpack_bframes bitstream filter to fix it.

와 같이 나왔다.

Consider using the mpeg4_unpack_bframes bitstream filter to fix it.

 

이 부분이 찜찜해서 실행 방법을 또 찾아봤다.

이렇게 실행한다

ffmpeg -i *E01*.avi -codec copy -bsf:v mpeg4_unpack_bframes Alone.in.Love.2006.XViD.AC3.E01-WAF.repack.avi

이 사이트 참고 했다.

https://superuser.com/questions/782634/ffmpeg-avidemux-fix-packed-b-frames

FFmpeg/avidemux: fix packed B-frames

 

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이상입니다.

퍼가기 하실때는 출처 꼭 같이 남겨주시면 감사하겠습니다.

출처: 코키티비, http://cocatv.tistory.com/266