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• opus_pvq : improve PVQ search for low Ks

  24 février 2017, par Rostislav Pehlivanov

  opus_pvq : improve PVQ search for low Ks
  Since the probelm mentioned only happened when the phase was negative
  
  (e.g. the sum had to be decreased), only discarding dimensions with a
  
  zero pulse in that case restored the search’s previously low distortion
  
  at low Ks when the phase is never negative.
  Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
  

  • [DH] libavcodec/opus_pvq.c

• FFMPEG corruption concat

  11 avril 2017, par Please Help

  When I run

  ffmpeg -f concat -i resizedvideolist.txt -c copy concatenated_time.mp4 2>&1

  it concatenates all the videos in the txt, but there is one video around halfway through that get glitched out. The audio just doesn’t play for that video, but then starts playing on the next video, so it has been delayed. Then somewhere the audio managed to catch up and gets back in sync. Seems like some major corruption going on here.

  I do not know how to fix this as the codec is the same as all the other vidoes, H.264, it is an mp4 like the others. The individual video file runs fine as it is, and it already is in the same timescale, because before this ffmpeg command, I ran

  ffmpeg -i ./tempDownloadedMemes/$videoFileName -filter_complex 'scale=1080:-1,pad=1080:1080:(ow-iw)/2:(oh-ih)/2:0x2F2F2F' -video_track_timescale 15360 ./resizedVideos/resized_videoFileName 2>&1

  To be honest I don’t even know what timescale is, but I read that it needs to be the same for it to work. I deleted the video from the list, tried this same command, and the problem was gone at the same time in the video that it would have appeared. It seems like it is something to do with that one file itself. Any known issues/workarounds on concat bugs ? This is very important to me. Thanks.

• undefined reference to 'ff_put_pixels_clamped_mmx'

  24 avril 2017, par Aviv Sharon

  I have a windows 8.1 64 bit, intel i7.
  I am trying to build ffmpeg dynamic libraries (dll) from sources, version 3.2.4 For that, I cloned ffmpeg git repository, and checked out tag n3.2.4
  I installed mingw64 in my windows 8.1, opened a mingw64 shell.
  I ran "configure" command before building, with the following switches :

  ./configure --prefix=ffmpeg/ --disable-gpl --disable-nonfree --enable-shared --disable-static --disable-doc  --disable-yasm --disable-debug --disable-network

  On some point, in the link phase, it exits with these ld errors :

  WINDRES libswresample/swresampleres.o
  
  GEN     libswresample/libswresample.ver
  
  LD      libswresample/swresample-2.dll
  
  sed -e "s/ @[^ ]*//" libswresample/swresample-2.orig.def > libswresample/swresample-2.def; dlltool -m i386:x86-64 -d libswresample/swresample-2.def -l libswresample/swresample.lib -D swresample-2.dll
  
  LD      libavcodec/avcodec-57.dll
  
  libavcodec/x86/simple_idct.o: In function `ff_simple_idct_put_mmx':
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:911: undefined reference to `ff_put_pixels_clamped_mmx'
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:911:(.text+0x1fb0): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `ff_put_pixels_clamped_mmx'
  
  libavcodec/x86/simple_idct.o: In function `ff_simple_idct_add_mmx':
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:916: undefined reference to `ff_add_pixels_clamped_mmx'
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:916:(.text+0x1fe0): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `ff_add_pixels_clamped_mmx'
  
  libavcodec/x86/simple_idct.o: In function `ff_simple_idct_put_sse2':
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:921: undefined reference to `ff_put_pixels_clamped_sse2'
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:921:(.text+0x2010): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `ff_put_pixels_clamped_sse2'
  
  libavcodec/x86/simple_idct.o: In function `ff_simple_idct_add_sse2':
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:926: undefined reference to `ff_add_pixels_clamped_sse2'
  
  C:\GitRepos\ffmpeg/libavcodec/x86/simple_idct.c:926:(.text+0x2040): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `ff_add_pixels_clamped_sse2'

  Found out that adding -mcmodel=large switch as suggested in some places should fix it.
  After I added it, I only left with the "undefined reference" errors, which I have a feeling that is related to 64/32 bit issues :

  GEN     libswresample/libswresample.ver
  
  LD      libswresample/swresample-2.dll
  
  sed -e "s/ @[^ ]*//" libswresample/swresample-2.orig.def > libswresample/swresample-2.def; dlltool -m i386:x86-64 -d libswresample/swresample-2.def -l libswresample/swresample.lib -D swresample-2.dll
  
  LD      libavcodec/avcodec-57.dll
  
  libavcodec/x86/simple_idct.o:simple_idct.c:(.rdata$.refptr.ff_add_pixels_clamped_sse2[.refptr.ff_add_pixels_clamped_sse2]+0x0): undefined reference to `ff_add_pixels_clamped_sse2'
  
  libavcodec/x86/simple_idct.o:simple_idct.c:(.rdata$.refptr.ff_put_pixels_clamped_sse2[.refptr.ff_put_pixels_clamped_sse2]+0x0): undefined reference to `ff_put_pixels_clamped_sse2'
  
  libavcodec/x86/simple_idct.o:simple_idct.c:(.rdata$.refptr.ff_add_pixels_clamped_mmx[.refptr.ff_add_pixels_clamped_mmx]+0x0): undefined reference to `ff_add_pixels_clamped_mmx'
  
  libavcodec/x86/simple_idct.o:simple_idct.c:(.rdata$.refptr.ff_put_pixels_clamped_mmx[.refptr.ff_put_pixels_clamped_mmx]+0x0): undefined reference to `ff_put_pixels_clamped_mmx'
  
  collect2.exe: error: ld returned 1 exit status
  
  make: *** [library.mak:94: libavcodec/avcodec-57.dll] Error 1

  Please help,
  thanks