video - 使用 ffmpeg 转换真实媒体-6ren

video - 使用 ffmpeg 转换真实媒体

转载作者：行者123 更新时间：2023-12-04 22:49:42

我有许多旧的硬壳 Real Media 文件需要转换，并希望编写一个脚本来批处理它们。我可以使用 FFMpegX 进行 Real Media -> AVI 转换，但是当我尝试使用 ffmpeg 复制转换时，它总是会出现以下错误:

[avi @ 0x10084fa00] Too large number of skipped frames 117425 > 60000

这可能与这些 Real Media 文件的时髦格式有关:

Duration: 01:28:23.42, start: 0.000000, bitrate: 448 kb/s
    Stream #0:0: Data: none, 32 kb/s
    Stream #0:1: Data: none, 192 kb/s
    Stream #0:2: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    Stream #0:3: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:4: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 8 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:5: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:6: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 27 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:7: Audio: cook (cook / 0x6B6F6F63), 22050 Hz, mono, fltp, 32 kb/s
    Stream #0:8: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 192 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    Stream #0:9: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 136 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    Stream #0:10: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    Stream #0:11: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    Stream #0:12: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:13: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:14: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:15: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc

有没有人有关于如何找出 FFMpegX 正在做什么以使转换工作的任何提示，或者是使用 ffmpeg 执行此操作的更好方法？

编辑

包括 ffmpeg 命令(感谢@Mondain 教我有关流映射的知识!)和输出:

命令:

ffmpeg -i cc121307pm.rm -map 0:8 -map 0:7 -c:v libx264 -c:a libfaac -b:a 32k test.avi

输出:

ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  built on Aug  7 2013 12:29:30 with gcc 4.2.1 (GCC) (Apple Inc. build 5664)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=/usr/bin/gcc-4.2 --host-cflags='-Os -w -pipe -march=core2 -msse4.1 -mmacosx-version-min=10.6' --host-ldflags=-L/usr/local/lib --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[rm @ 0x10180f200] Unsupported stream type 00000265
[rm @ 0x10180f200] Unsupported stream type 00000652
[rm @ 0x10180f200] max_analyze_duration 5000000 reached at 5004000 microseconds
Input #0, rm, from 'input.rm':
  Metadata:
    File ID         : 41deac0f-94fb-3595-325c-c717943bc532
    Content Rating  : (PICS-1.1 "http://www.classify.org/safesurf" labels comment "RealProducer Plus 8.5.0.200 Windows" ratings (SS~~000 1))
    Modification Date: 12/13/2007 16:26:16
    Generated By    : RealProducer Plus 8.5.0.200 Windows
    Keywords        : 
    Abstract        : 
    Target Audiences: 28K Modem (20 Kbps);56K Modem (34 Kbps);256K DSL/Cable Modem (225 Kbps);
    Video Quality   : Normal Motion Video
    Audio Format    : Voice Only
    Creation Date   : 12/13/2007 14:57:49
    ASMRuleBook     : #($Bandwidth < 15000),Stream2Bandwidth = 6500, Stream3Bandwidth = 5499;#($Bandwidth >= 15000) && ($Bandwidth < 20000),Stream2Ba
    title           : 
    author          : 
    copyright       : ?2007
    comment         : 
  Duration: 01:28:23.42, start: 0.000000, bitrate: 448 kb/s
    Stream #0:0: Data: none, 32 kb/s
    Stream #0:1: Data: none, 192 kb/s
    Stream #0:2: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    Stream #0:3: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:4: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 8 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:5: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:6: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 27 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:7: Audio: cook (cook / 0x6B6F6F63), 22050 Hz, mono, fltp, 32 kb/s
    Stream #0:8: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 192 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    Stream #0:9: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 136 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    Stream #0:10: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    Stream #0:11: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    Stream #0:12: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:13: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:14: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    Stream #0:15: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
[libx264 @ 0x101889c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 0x101889c00] profile High, level 1.3
Output #0, avi, to 'test.avi':
  Metadata:
    File ID         : 41deac0f-94fb-3595-325c-c717943bc532
    Content Rating  : (PICS-1.1 "http://www.classify.org/safesurf" labels comment "RealProducer Plus 8.5.0.200 Windows" ratings (SS~~000 1))
    Modification Date: 12/13/2007 16:26:16
    Generated By    : RealProducer Plus 8.5.0.200 Windows
    Keywords        : 
    Abstract        : 
    Target Audiences: 28K Modem (20 Kbps);56K Modem (34 Kbps);256K DSL/Cable Modem (225 Kbps);
    Video Quality   : Normal Motion Video
    Audio Format    : Voice Only
    Creation Date   : 12/13/2007 14:57:49
    ASMRuleBook     : #($Bandwidth < 15000),Stream2Bandwidth = 6500, Stream3Bandwidth = 5499;#($Bandwidth >= 15000) && ($Bandwidth < 20000),Stream2Ba
    INAM            : 
    author          : 
    ICOP            : ?2007
    ICMT            : 
    ISFT            : Lavf54.63.104
    Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 320x240, q=-1--1, 30 tbn, 30 tbc
    Stream #0:1: Audio: aac ([255][0][0][0] / 0x00FF), 22050 Hz, mono, s16, 32 kb/s
Stream mapping:
  Stream #0:8 -> #0:0 (rv20 -> libx264)
  Stream #0:7 -> #0:1 (cook -> libfaac)
Press [q] to stop, [?] for help
[rm @ 0x10180f200] DATA tag in middle of chunk, file may be broken.
Truncating packet of size 775215378 to 283607526
[rm @ 0x10180f200] Impossibly sized packet
Truncating packet of size 686581284 to 279055389
[rm @ 0x10180f200] Impossibly sized packet
Truncating packet of size 845942319 to 279042877
[rm @ 0x10180f200] Impossibly sized packet
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[rm @ 0x10180f200] Impossibly sized packet
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[rm @ 0x10180f200] DATA tag in middle of chunk, file may be broken.
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input.rm: Input/output error
frame=    0 fps=0.0 q=0.0 Lsize=      10kB time=00:00:00.00 bitrate=N/A    
video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead inf%
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

最佳答案

您的文件似乎包含多个流，并且在使用 ffmpeg 时，您需要选择要转换的流。有人会假设您想要文件中质量最高的音频/视频对。以下是您如何使用“map”选项来定位流:
http://trac.ffmpeg.org/wiki/How%20to%20use%20-map%20option

如果我有这个文件，我会使用这个命令:

ffmpeg -i [real-input-file] \
-map 0:8 -map 0:7 \
-c:v libx264 \
-c:a libfaac -b:a 32k \
output.mkv

关于video - 使用 ffmpeg 转换真实媒体，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18108323/

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video - 使用 ffmpeg 转换真实媒体