我有一個4G,3個小時的mkv檔,因為要剪下前20分鐘 就用了mkvmerge 結果切割下來的檔用kmplayer播放沒有聲音,但是播原檔是有聲音的 但是用MPC-HC兩個都可以正常播放 請問這是哪裏出問題? mediainfo 原檔 Format : Matroska Format version : Version 1 File size : 4.52 GiB Duration : 2h 49mn Overall bit rate : 3 827 Kbps Encoded date : UTC 2012-12-04 02:35:33 Writing application : Helix Producer MKV Output Plugin - MatroskaMuxer 1.0 Writing library : libebml v0.6.3 + libmatroska v0.6.3 Video ID : 2 Format : RealVideo 4 Codec ID : V_REAL/RV40 Codec ID/Info : RealVideo 4.0 aka RealVideo 9 Duration : 2h 49mn Bit rate : 3 686 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate : 29.970 fps Bits/(Pixel*Frame) : 0.133 Stream size : 4.35 GiB (96%) Language : English Default : Yes Forced : No Audio ID : 1 Format : Cooker Codec ID : A_REAL/COOK Codec ID/Info : Real Audio Cook Codec (codename: Gecko) Duration : 2h 49mn Bit rate : 64.1 Kbps Channel(s) : 2 channels Sampling rate : 44.1 KHz Bit depth : 16 bits Stream size : 77.5 MiB (2%) Language : English Default : Yes Forced : No 切割下來的檔 Format : Matroska Format version : Version 2 File size : 573 MiB Duration : 20mn 0s Overall bit rate : 4 008 Kbps Encoded date : UTC 2012-12-09 06:05:31 Writing application : mkvmerge v4.1.1 ('Bouncin' Back') 編譯於 Jul 3 2010 22:54:08 Writing library : libebml v1.0.0 + libmatroska v1.0.0 Video ID : 2 Format : RealVideo 4 Codec ID : V_REAL/RV40 Codec ID/Info : RealVideo 4.0 aka RealVideo 9 Duration : 20mn 0s Bit rate : 3 864 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate : 29.970 fps Bits/(Pixel*Frame) : 0.140 Stream size : 553 MiB (96%) Language : English Default : Yes Forced : No Audio ID : 1 Format : Cooker Codec ID : A_REAL/COOK Codec ID/Info : Real Audio Cook Codec (codename: Gecko) Duration : 20mn 0s Bit rate : 64.1 Kbps Channel(s) : 2 channels Sampling rate : 44.1 KHz Bit depth : 16 bits Stream size : 9.17 MiB (2%) Language : English Default : Yes Forced : No --

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