ffmpeg请求的帧数太多 [英] ffmpeg Too many bits per frame requested

问题描述

我正在使用ffmpeg将视频转换为mp4格式。一切都可以正常工作，除了MOV格式。

I am using ffmpeg to convert videos to mp4 format. Everything works fine except with MOV format.

我使用的命令是：

ffmpeg -i input.mov -strict experiment -sameq -s vga -aspect 1.7777 -vcodec libx264 -preset fast -crf 22 -y output.mp4

，但我得到的输出是：

ffmpeg version 0.9, Copyright (c) 2000-2011 the FFmpeg developers
built on Mar 12 2012 11:01:05 with gcc 4.4.5
configuration: --enable-libx264 --enable-gpl --disable-yasm
  libavutil    51. 32. 0 / 51. 32. 0
  libavcodec   53. 42. 0 / 53. 42. 0
  libavformat  53. 24. 0 / 53. 24. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 53. 0 /  2. 53. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x21767a0] Referenced QT chapter track not found

Seems stream 0 codec frame rate differs from container frame rate: 30.00 (30/1) -> 30.07 (2225/74)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mov':
  Metadata:
    creation_time   : 2009-04-04 07:12:29
    comment         : EASTMAN KODAK COMPANY  KODAK Z1275 ZOOM DIGITAL CAMERA
    comment-eng     : EASTMAN KODAK COMPANY  KODAK Z1275 ZOOM DIGITAL CAMERA
  Duration: 00:00:17.76, start: 0.000000, bitrate: 8100 kb/s
    Stream #0:0(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 7968 kb/s, 30.07 fps, 30.07 tbr, 8544k tbn, 30 tbc
    Metadata:
      creation_time   : 2009-04-04 07:12:29
      handler_name    : 
    Stream #0:1(eng): Audio: pcm_mulaw (ulaw / 0x77616C75), 16000 Hz, 1 channels, s16, 128 kb/s
    Metadata:
      creation_time   : 2009-04-04 07:12:29
      handler_name    : 
[buffer @ 0x2187f00] w:1280 h:720 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
[scale @ 0x219c120] w:1280 h:720 fmt:yuv420p -> w:640 h:480 fmt:yuv420p flags:0x4
[libx264 @ 0x2190d20] using SAR=4/3
[libx264 @ 0x2190d20] using cpu capabilities: none!
[libx264 @ 0x2190d20] profile High, level 3.0
[libx264 @ 0x2190d20] 264 - core 120 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 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=12 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=22.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[aac @ 0x21917e0] Too many bits per frame requested
Output #0, mp4, to 'output.mp4':
  Metadata:
    creation_time   : 2009-04-04 07:12:29
    comment         : EASTMAN KODAK COMPANY  KODAK Z1275 ZOOM DIGITAL CAMERA
    comment-eng     : EASTMAN KODAK COMPANY  KODAK Z1275 ZOOM DIGITAL CAMERA
    Stream #0:0(eng): Video: h264, yuv420p, 640x480 [SAR 4:3 DAR 16:9], q=-1--1, 90k tbn, 30.07 tbc
    Metadata:
      creation_time   : 2009-04-04 07:12:29
      handler_name    : 
    Stream #0:1(eng): Audio: aac, 16000 Hz, 1 channels, s16, 128 kb/s
    Metadata:
      creation_time   : 2009-04-04 07:12:29
      handler_name    : 
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 -> libx264)
  Stream #0:1 -> #0:1 (pcm_mulaw -> aac)
Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

似乎问题是每帧音频的位。
哪个可能是正确的解决方案？

It seems the problem is with audio's bit per frame. Which might be the right solution?

推荐答案

$ code 错误来自本机FFmpeg AAC编码器（ -c：a aac ）。您可以使用一个或多个以下解决方案：

The "Too many bits per frame requested" error is coming from the native FFmpeg AAC encoder (-c:a aac). You can use one or more of the following solutions:

开发非常活跃，本机FFmpeg AAC编码器已经有了很多改进; 现在将自动将其钳制到每帧的最大位数，而不是使用此错误失败。请参阅 FFmpeg下载页面，获取已编译二进制文件的链接，这是获取最近 ffmpeg 。

Development is very active and the native FFmpeg AAC encoder has seen many improvements; it will now automatically clamp to the max number of bits per frame instead of failing with this error. See the FFmpeg Download page for links to already compiled binaries which are the easiest method to get a recent ffmpeg.

• 增加音频采样率，例如添加 -ar 44100 。

• Increase the audio sampling rate such as by adding -ar 44100.

降低你的比特率。默认值可能是 -b：一个128k 。尝试使用较低的值，直到它有效。

Decrease your bitrate. Default is probably -b:a 128k. Try lower values until it works.

使用 -c：a copy to （重新复制），因为MP4不支持 pcm_mulaw ，使用不同的输出容器格式，如Matroska（ .mkv ）。

Use -c:a copy to stream copy (re-mux) the audio, and, because MP4 doesn't support pcm_mulaw, use different output container format such as Matroska (.mkv).

如果您的 ffmpeg 支持它，请使用其他AAC编码器，如 libfdk_aac 。

Use a different AAC encoder such as libfdk_aac if your ffmpeg supports it.

如果您升级 ffmpeg ，则不需要执行任何这些选项。

You don't need to do any of these options if you upgrade ffmpeg.

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