我正在将一段 20 分钟长的视频分割成数百个小片段。命令如下
ffmpeg\\ffmpeg -i nx_1.avi -ss 399.37 -t 1 ka1_2.avi
ffmpeg 位于子文件夹中。
它对我的大多数视频文件都很好用。问题出在一个文件上，对于那个文件，一些分段剪辑只有音频，相关视频显然没有写入剪辑中。（下面附有日志文件。）但视频其他部分的分段剪辑都很好。音频和视频都很好。我尝试分割一个较长的剪辑来包围原始视频中有问题的部分并重播它。剪辑播放正常，直到有问题的部分，它在有问题部分的开头冻结了。
我使用 ffprobe 探测 avi，它说 ODML 索引无效。我猜这就是问题所在。
我怎么解决这个问题？
日志档案：
ffmpeg started on 2013-05-07 at 10:29:33
Report written to "ffmpeg-20130507-102933.log"
Command line:
"ffmpeg\\\\ffmpeg" -i nx_1.avi -ss 399.37 -t 1 ka1_2.avi -report
ffmpeg version N-51683-g9dc88ac Copyright (c) 2000-2013 the FFmpeg developers
built on Apr 8 2013 21:22:02 with gcc 4.8.0 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 25.100 / 52. 25.100
libavcodec 55. 2.100 / 55. 2.100
libavformat 55. 1.100 / 55. 1.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 49.101 / 3. 49.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Splitting the commandline.
Reading option '-i' ... matched as input file with argument 'nx_1.avi'.
Reading option '-ss' ... matched as option 'ss' (set the start time offset) with argument '399.37'.
Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '1'.
Reading option 'ka1_2.avi' ... matched as output file.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file nx_1.avi.
Successfully parsed a group of options.
Opening an input file: nx_1.avi.
[avi @ 007c8f40] Format avi probed with size=2048 and score=100
[avi @ 01d9b800] use odml:1
st:0 removing common factor 400000 from timebase
[avi @ 007c8f40] File is truncated adjusting duration
[avi @ 007c8f40] ODML index invalid
[avi @ 007c8f40] ODML index invalid
[avi @ 007c8f40] ODML index invalid
[avi @ 007c8f40] ODML index invalid
[avi @ 007c8f40] ODML index invalid
[avi @ 007c8f40] ODML index invalid
st:1 removing common factor 4 from timebase
[avi @ 007c8f40] ODML index invalid
[avi @ 007c8f40] non-interleaved AVI
[avi @ 007c8f40] File position before avformat_find_stream_info() is 64668
[avi @ 007c8f40] parser not found for codec dvvideo, packets or times may be invalid.
[avi @ 007c8f40] parser not found for codec pcm_s16le, packets or times may be invalid.
[avi @ 007c8f40] parser not found for codec dvvideo, packets or times may be invalid.
[avi @ 007c8f40] parser not found for codec pcm_s16le, packets or times may be invalid.
[avi @ 007c8f40] All info found
[avi @ 007c8f40] File position after avformat_find_stream_info() is 3733036
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from 'nx_1.avi':
Duration: 00:04:05.12, start: 0.000000, bitrate: 7187 kb/s
Stream #0:0, 1, 1/25: Video: dvvideo (dvsd / 0x64737664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
Stream #0:1, 1, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Successfully opened the file.
Parsing a group of options: output file ka1_2.avi.
Applying option ss (set the start time offset) with argument 399.37.
Applying option t (record or transcode "duration" seconds of audio/video) with argument 1.
Successfully parsed a group of options.
Opening an output file: ka1_2.avi.
Successfully opened the file.
[buffer @ 007c6fe0] Setting entry with key 'video_size' to value '720x576'
[buffer @ 007c6fe0] Setting entry with key 'pix_fmt' to value '0'
[buffer @ 007c6fe0] Setting entry with key 'time_base' to value '1/25'
[buffer @ 007c6fe0] Setting entry with key 'pixel_aspect' to value '16/15'
[buffer @ 007c6fe0] Setting entry with key 'sws_param' to value 'flags=2'
[buffer @ 007c6fe0] Setting entry with key 'frame_rate' to value '25/1'
[graph 0 input from stream 0:0 @ 007cdda0] w:720 h:576 pixfmt:yuv420p tb:1/25 fr:25/1 sar:16/15 sws_param:flags=2
[AVFilterGraph @ 01d9b2e0] query_formats: 4 queried, 3 merged, 0 already done, 0 delayed
[abuffer @ 007c6f60] Setting entry with key 'time_base' to value '1/48000'
[abuffer @ 007c6f60] Setting entry with key 'sample_rate' to value '48000'
[abuffer @ 007c6f60] Setting entry with key 'sample_fmt' to value 's16'
[abuffer @ 007c6f60] Setting entry with key 'channel_layout' to value '0x3'
[graph 1 input from stream 0:1 @ 007ca880] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[aformat @ 007cde40] Setting entry with key 'sample_fmts' to value 's32p,fltp,s16p'
[aformat @ 007cde40] Setting entry with key 'sample_rates' to value '44100,48000,32000,22050,24000,16000,11025,12000,8000'
[aformat @ 007cde40] Setting entry with key 'channel_layouts' to value '0x4,0x3'
[audio format for output stream 0:1 @ 007ca940] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:1'
[AVFilterGraph @ 007c9740] query_formats: 4 queried, 9 merged, 3 already done, 0 delayed
[auto-inserted resampler 0 @ 007ca9a0] ch:2 chl:stereo fmt:s16 r:48000Hz -> ch:2 chl:stereo fmt:s16p r:48000Hz
[mpeg4 @ 021f0060] detected 8 logical cores
[mpeg4 @ 021f0060] intra_quant_bias = 0 inter_quant_bias = -64
[dvvideo @ 007ccd60] detected 8 logical cores
Output #0, avi, to 'ka1_2.avi':
Metadata:
ISFT : Lavf55.1.100
Stream #0:0, 0, 1/25: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream #0:1, 0, 3/125: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16p
Stream mapping:
Stream #0:0 -> #0:0 (dvvideo -> mpeg4)
Stream #0:1 -> #0:1 (pcm_s16le -> libmp3lame)
Press [q] to stop, [?] for help
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
frame= 0 fps=0.0 q=0.0 size= 10kB time=00:00:00.00 bitrate=N/A
EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
[libmp3lame @ 021f0440] Trying to remove 47 more samples than there are in the queue
frame= 0 fps=0.0 q=0.0 Lsize= 27kB time=00:00:01.03 bitrate= 213.5kbits/s
video:0kB audio:16kB subtitle:0 global headers:0kB muxing overhead 66.787791%
[AVIOContext @ 01d9a200] Statistics: 10 seeks, 51 writeouts
[AVIOContext @ 01d98d20] Statistics: 1566764528 bytes read, 16520 seeks