Transcoding with mp4a Doesn't Work… Again.

[Haravikk]

Ever since the update to v2.0 I have never been able to get mp4a audio to work when transcoding, except for a brief period when setting ffmpeg strictness to -2 seemed to work, but every update seems to break it again.
All I really use VLC for is transcoding .mkv files to .mp4 with H.264 video and AAC audio, so it's a very annoying issue, especially since my only fallback is to use Quicktime to just re-save as a .mov, but that doesn't help with file-sizes as VLC can usually re-encode many of my files with an up to 75% reduction on file size with no discernible loss of quality, which is one of the main reasons I want to do this.

I've tried fully uninstalling VLC (removing the application plus ~/Library/Preferences/org.videolan.vlc) but it didn't help, which suggests the problem exists with VLC as-is, so what's going wrong?

I'm including the log from my last attempt, hopefully there's something there that suggests what's going wrong, as I really need get this fixed once and for all.

Code: Select all

mkv debug: | | + Seek mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 379572770 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 379948262 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 380461019 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 380791447 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 381628499 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 382269117 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 383081635 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 383822329 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 385339455 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 386896716 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 388411920 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 389285695 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 390296000 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 390729312 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 391232215 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 391815939 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 392315312 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 392876425 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 393221207 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 394154762 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 395016553 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 395853484 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 396573466 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 396830900 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 397502791 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 398574135 mkv debug: | | + Seek mkv debug: | - 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unknown seekhead reference at 606836395 mkv debug: | | + Seek mkv debug: | - unknown seekhead reference at 607902100 mkv debug: | | + Seek mkv warning: MKV/Ebml Parser: m_el[mi_level] == NULL mkv warning: MKV/Ebml Parser: Up cannot escape itself mkv debug: | - unknown seekhead reference at 609314576 mkv debug: | | + Seek mkv debug: | | + Unknown (N7libebml8EbmlVoidE) mkv debug: | - cues at 609862049 mkv debug: | + Cues mkv debug: | - loading cues done. mkv debug: | + Void mkv debug: | + Information mkv debug: | + Tracks mkv debug: | + Void mkv debug: | + Cluster mkv debug: found 5 escape main debug: selecting program id=0 mkv debug: Starting the UI Hook main debug: using demux module "mkv" main debug: TIMER module_need() : 401.903 ms - Total 401.903 ms / 1 intvls (Avg 401.903 ms) main debug: looking for a subtitle file in <filename> main debug: looking for packetizer module: 21 candidates main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) main debug: no fetch required for <filename> (art currently (null)) packetizer_h264 debug: found NAL_SPS (sps_id=0) packetizer_h264 debug: found NAL_PPS (pps_id=0 sps_id=0) packetizer_h264 debug: avcC length size=4, sps=1, pps=1 main debug: using packetizer module "packetizer_h264" main debug: TIMER module_need() : 42.337 ms - Total 42.337 ms / 1 intvls (Avg 42.337 ms) main debug: looking for packetizer module: 21 candidates main debug: using packetizer module "a52" main debug: TIMER module_need() : 11.670 ms - Total 11.670 ms / 1 intvls (Avg 11.670 ms) main debug: starting in sync mode main debug: looking for meta reader module: 2 candidates lua debug: Trying Lua scripts in /Users/haravikk/Library/Application Support/org.videolan.vlc/lua/meta/reader lua debug: Trying Lua scripts in /Applications/VLC.app/Contents/MacOS/share/lua/meta/reader lua debug: Trying Lua playlist script /Applications/VLC.app/Contents/MacOS/share/lua/meta/reader/filename.lua lua debug: Trying Lua scripts in /Applications/VLC.app/Contents/MacOS/share/share/lua/meta/reader main debug: no meta reader module matching "any" could be loaded main debug: TIMER module_need() : 1.663 ms - Total 1.663 ms / 1 intvls (Avg 1.663 ms) main debug: `<filename>' successfully opened main debug: switching to async mode a52 debug: A/52 channels:6 samplerate:48000 bitrate:384000 main debug: adding a new sout input (sout_input:0x109ca0ba0) stream_out_transcode debug: creating audio transcoding from fcc=`a52 ' to fcc=`mp4a' main debug: adding a new sout input (sout_input:0x1048aeb80) main debug: Buffering 0% main debug: looking for decoder module: 32 candidates main debug: Buffering 33% main debug: Buffering 66% main debug: Stream buffering done (1001 ms in 1 ms) main debug: using decoder module "a52" main debug: TIMER module_need() : 5.569 ms - Total 5.569 ms / 1 intvls (Avg 5.569 ms) main debug: looking for encoder module: 12 candidates macosx debug: prevented sleep through IOKit (3971) avcodec debug: libavcodec initialized (interface 0x362901) avcodec warning: stereo mode selected (codec limitation) avcodec error: cannot open encoder main debug: no encoder module matching "any" could be loaded main debug: TIMER module_need() : 27.086 ms - Total 27.086 ms / 1 intvls (Avg 27.086 ms) stream_out_transcode error: cannot find audio encoder (module:any fourcc:mp4a). Take a look few lines earlier to see possible reason. main debug: removing module "a52" stream_out_transcode error: cannot create audio chain main error: cannot create packetizer output (a52 ) stream_out_transcode debug: creating video transcoding from fcc=`h264' to fcc=`h264' main debug: looking for decoder module: 32 candidates avcodec debug: libavcodec already initialized avcodec debug: trying to use direct rendering avcodec debug: allowing 4 thread(s) for decoding avcodec debug: ffmpeg codec (H264 - MPEG-4 AVC (part 10)) started avcodec debug: using frame thread mode with 4 threads main debug: using decoder module "avcodec" main debug: TIMER module_need() : 8.755 ms - Total 8.755 ms / 1 intvls (Avg 8.755 ms) main debug: looking for encoder module: 12 candidates x264 debug: version x264 0.125.X main debug: using encoder module "x264" main debug: TIMER module_need() : 13.480 ms - Total 13.480 ms / 1 intvls (Avg 13.480 ms) main debug: removing module "x264" x264 debug: framecount still in libx264 buffer: 0 main debug: Decoder buffering done in 59 ms avcodec debug: using direct rendering stream_out_transcode debug: decoder aspect is 1.777778:1 stream_out_transcode debug: source pixel aspect is 1.000000:1 stream_out_transcode debug: scaled pixel aspect is 1.000000:1 stream_out_transcode debug: source 1280x720, destination 1280x720 stream_out_transcode debug: encoder aspect is 1280:720 stream_out_transcode debug: destination (after video filters) 1280x720 main debug: looking for encoder module: 12 candidates x264 debug: version x264 0.125.X main debug: using encoder module "x264" main debug: TIMER module_need() : 8.375 ms - Total 8.375 ms / 1 intvls (Avg 8.375 ms) main debug: adding a new input mux_mp4 debug: adding input macosx debug: releasing sleep blocker (3971)