FFMpeg で次のコマンドを実行しようとすると、エラーが発生しました。
-i "file1.mp4" -s 506x406 -b:v 2000k -ar 22050 "file2.mp4"
FFMpeg は、このビデオ (わずか 7Mb の .mp4 ファイル) を変換するのに何時間もかかってしまい、最終的にプロセスを強制終了する必要がありました。
FFMpeg からの出力エラーは次のとおりです。
Converter Error Message:
ffmpeg version N-42069-g3233ad4 Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 30 2012 13:18:20 with gcc 4.7.1
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 51. 63.100 / 51. 63.100
libavcodec 54. 31.100 / 54. 31.100
libavformat 54. 14.100 / 54. 14.100
libavdevice 54. 0.100 / 54. 0.100
libavfilter 3. 0.100 / 3. 0.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'File1.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp42mp41
creation_time : 2013-07-18 15:38:11
Duration: 00:02:02.23, start: -7.105889, bitrate: 518 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 718x574 [SAR 64:45 DAR 22976:12915], 361 kb/s, 24.97 fps, 90k tbr, 90k tbn, 180k tbc
Metadata:
creation_time : 2013-07-18 15:38:11
handler_name : Apple Video Media Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 129 kb/s
Metadata:
creation_time : 2013-07-18 15:38:11
handler_name : Apple Sound Media Handler
[graph 0 input from stream 0:0 @ 0259cee0] w:718 h:574 pixfmt:yuv420p tb:1/90000 fr:90000/1 sar:64/45 sws_param:flags=2
[output stream 0:0 @ 0259cda0] No opaque field provided
[scaler for output stream 0:0 @ 0259c0e0] w:718 h:574 fmt:yuv420p sar:64/45 -> w:506 h:406 fmt:yuv420p sar:666304/466785 flags:0x4
**[mp4 @ 02599020] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2**
[graph 1 input from stream 0:1 @ 02b88200] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[auto-inserted resampler 0 @ 024e44e0] chl:stereo fmt:s16 r:48000Hz -> chl:stereo fmt:s16 r:22050Hz
[libx264 @ 02407200] using SAR=895/627
[libx264 @ 02407200] MB rate (74880000) > level limit (2073600)
[libx264 @ 02407200] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
[libx264 @ 02407200] profile High, level 5.2
[libx264 @ 02407200] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=3 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=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=2000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'File2.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp42mp41
encoder : Lavf54.14.100
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 506x406 [SAR 666304:466785 DAR 22976:12915], q=-1--1, 2000 kb/s, 180k tbn, 90k tbc
Metadata:
creation_time : 2013-07-18 15:38:11
handler_name : Apple Video Media Handler
Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 22050 Hz, stereo, s16, 128 kb/s
Metadata:
creation_time : 2013-07-18 15:38:11
handler_name : Apple Sound Media Handler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
Press [q] to stop, [?] for help
DTS -3600, next:-79995 st:0 invalid dropping
frame= 7201 fps=768 q=69.0 size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=7198 drop=0
frame=10801 fps=575 q=69.0 size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=10797 drop=0
frame=14401 fps=516 q=69.0 size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=14396 drop=0
frame=18001 fps=484 q=69.0 size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=17995 drop=0
frame=21601 fps=464 q=69.0 size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=21594 drop=0
frame=25201 fps=454 q=69.0 size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=25193 drop=0
.....
そして、プロセスを強制終了するまで、それはほとんどそのまま続きます。
ここで何が起こっているのか、これを修正するために何ができるのかを誰かに説明してもらえますか?