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Handbrake 中的音频很慢

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Handbrake 中的音频很慢

我试图将 H264 视频转换为 iPod 分辨率，以便能够在我的 Palm Pre 上观看。结果发现，虽然视频转换得很好，但音轨似乎明显变慢了。我用 0.9.3 和 svn2907 测试了这个问题，结果相似。

环顾四周，似乎虽然有类似的报告，但尚未得到解决。FWIW，这是在运行 10.6.1 的 Snow Leopard 上发生的。

输出如下：

[23:52:14] hb_init: checking cpu count
[23:52:14] hb_init: starting libhb thread
HandBrake svn2907 (2009110101) - Darwin x86_64 - http://handbrake.fr
2 CPUs detected
Opening sample.mp4...
[23:52:14] hb_scan: path=sample.mp4, title_index=1
[23:52:14] scan: trying to open with libdvdread
libdvdnav: Using dvdnav version 4.1.3
libdvdread: Using libdvdcss version 1.2.10 for DVD access
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[23:52:15] dvd: not a dvd - trying as a stream/file instead
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  Duration: 00:00:58.89, start: 0.000000, bitrate: 1668 kb/s
    Stream #0.0(und): Video: h264, yuv420p, 1280x544 [PAR 1:1 DAR 40:17], 23.98 tbr, 23.98 tbn, 47.95 tbc
    Stream #0.1(und): Audio: aac, 48000 Hz, 5.1, s16
[23:52:15] scan: decoding previews for title 1
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
[23:52:16] scan: 10 previews, 1280x544, 23.976 fps, autocrop = 0/0/0/0, aspect 2.35:1, PAR 1:1
[23:52:16] scan: title (0) job->width:1280, job->height:544
[23:52:16] libhb: scan thread found 1 valid title(s)
+ title 1:
  + vts 0, ttn 0, cells 0->0 (0 blocks)
  + angle(s) 0
  + duration: 00:00:58
  + size: 1280x544, pixel aspect: 1/1, display aspect: 2.35, 23.976 fps
  + autocrop: 0/0/0/0
  + chapters:
    + 1: cells 0->0, 0 blocks, duration 00:00:58
  + audio tracks:
    + 1, Unknown (AAC) (iso639-2: und)
  + subtitle tracks:
[23:52:17] 1 job(s) to process
[23:52:17] starting job
[23:52:17] work: sanitizing track 0 mixdown Dolby Pro Logic II to Stereo
[23:52:17] job configuration:
[23:52:17]  * source
[23:52:17]    + sample.mp4
[23:52:17]    + title 1, chapter(s) 1 to 1
[23:52:17]    + container: mov,mp4,m4a,3gp,3g2,mj2
[23:52:17]    + data rate: 1668 kbps
[23:52:17]  * destination
[23:52:17]    + foo.mp4
[23:52:17]    + container: MPEG-4 (.mp4 and .m4v)
[23:52:17]  * video track
[23:52:17]    + decoder: h264
[23:52:17]    + frame rate: same as source (around 23.976 fps)
[23:52:17]    + dimensions: 1280 * 544 -> 480 * 320, crop 0/0/0/0
[23:52:17]    + encoder: FFmpeg
[23:52:17]      + bitrate: 1000 kbps, pass: 0
[23:52:17]  * audio track 0
[23:52:17]    + decoder: Unknown (AAC) (track 1, id 1)
[23:52:17]    + mixdown: Stereo
[23:52:17]    + encoder: faac
[23:52:17]      + bitrate: 160 kbps, samplerate: 48000 Hz
libdvdnav: Using dvdnav version 4.1.3
libdvdread: Using libdvdcss version 1.2.10 for DVD access
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[23:52:17] dvd: not a dvd - trying as a stream/file instead
[23:52:17] reader: first SCR 3753 id 0 DTS 0
[23:52:17] sync: expecting 1435 video frames
Encoding: task 1 of 1, 0.00 %[23:52:17] sync: first pts is 3753
Encoding: task 1 of 1, 95.05 % (33.21 fps, avg 35.73 fps, ETA 00h00m02s)[23:52:56] reader: done. 1 scr changes
Encoding: task 1 of 1, 96.72 % (34.55 fps, avg 35.52 fps, ETA 00h00m01s)[23:52:56] sync: got 1410 frames, 1435 expected
[23:52:56] work: average encoding speed for job is 35.522232 fps
Encoding: task 1 of 1, 98.26 % (34.55 fps, avg 35.52 fps, ETA 00h00m01s)[23:52:58] mux: track 0, 1410 frames, 5452132 bytes, 247.05 kbps, fifo 8
[23:52:58] mux: track 1, 8275 frames, 3522495 bytes, 159.61 kbps, fifo 8192
[23:52:58] h264-decoder done: 1411 frames, 0 decoder errors, 0 drops
[23:52:58] render: lost time: 0 (0 frames)
[23:52:58] render: gained time: 0 (0 frames) (0 not accounted for)
[23:52:58] aac-decoder done: 0 frames, 0 decoder errors, 0 drops
[23:52:58] libhb: work result = 0

答案1

有点激烈，但我之前所做的（成功）是从视频中提取音频（您可以使用 garageband - 拖入视频文件，删除视频轨道，导出音频），然后尝试重新编码视频，单独导入音频以重新组合它们。

答案2

您是否尝试过使用 CBR 音频源？ 碰巧是这样的，经过一些测试后，这种立体声源到单声道的转换似乎只有在使用 VBR 源时才会发生。 我尝试使用 CBR 音频源，但没有慢动作音频

答案3

当您更改输出文件的音频设置（尝试另一种格式、另一种比特率等）时会发生什么？

答案4

如果您在“音频和字幕”选项卡中将混音保留为“杜比 Pro Logic II”（而不是立体声），这种情况还会发生吗？我以前听说过这个 HandBrake 问题，但通常该错误与“单声道”混音有关。请尝试一下并报告结果。

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