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• Ffmpeg won't copy excerpt of video correctly

  5 mai 2022, par JR Jr.

  I am using a DOS batch to automate and copy excerpts of various high definition videos (mkv's with more than 1GB each).
The script is very convenient and runs fast and fine, but Ffmpeg is not doing its job correctly (it seems Murphy's law is inexorably enthralled into technology, things never come easy, which is why I love and hate it).

  


  Anyway, to cut a long story short, each time the batch job runs, a code like below is executed (pardon me the indiscrete folder name, it's about the 90's TV show, it's not porn !).

  


  call "C:\ffmpeg\bin\ffmpeg.exe" -y -i "D:\100\Sexo\S01\SATC - S01E03 - Bay of Married Pigs.mkv" -ss 00:18:05 -to 00:19:15 -codec copy "002-SATC - S01E03 - Bay of Married Pigs-00_18_05-00_19_15.mp4"


  


  The problem is that the first 6 seconds or so of the resulting video has no video, only audio with a frozen image that only starts to move after about 6 seconds, which is a huge defect, not to mention very annoying (a big let down, after all my meticulous scripting work :(). And this happens for most of the files, except a few ones.

  


  Even though this is copying and changing the format from mkv to mp4, per another thread on this site (https://askubuntu.com/questions/396883/how-to-simply-convert-video-files-i-e-mkv-to-mp4), this is not re-encoding, so this is not the issue. Actually, the same problem occurs even if I don't change the format from mkv to mp4.

  


  Even though I foresee a "there's no way to fix this", let me ask : is there a way to fix this ? Hopefully there is a way.

  


• dsputil : Split motion estimation compare bits off into their own context

  8 février 2014, par Diego Biurrun

  dsputil : Split motion estimation compare bits off into their own context
  

  • [DBH] configure
  • [DBH] libavcodec/Makefile
  • [DBH] libavcodec/ac3enc.c
  • [DBH] libavcodec/ac3enc.h
  • [DBH] libavcodec/arm/Makefile
  • [DBH] libavcodec/arm/me_cmp_armv6.S
  • [DBH] libavcodec/arm/me_cmp_init_arm.c
  • [DBH] libavcodec/dv.h
  • [DBH] libavcodec/dvenc.c
  • [DBH] libavcodec/error_resilience.c
  • [DBH] libavcodec/error_resilience.h
  • [DBH] libavcodec/h264.c
  • [DBH] libavcodec/h264.h
  • [DBH] libavcodec/h264_slice.c
  • [DBH] libavcodec/me_cmp.c
  • [DBH] libavcodec/me_cmp.h
  • [DBH] libavcodec/motion_est.c
  • [DBH] libavcodec/motion_est_template.c
  • [DBH] libavcodec/mpeg4videoenc.c
  • [DBH] libavcodec/mpegvideo.c
  • [DBH] libavcodec/mpegvideo.h
  • [DBH] libavcodec/mpegvideo_enc.c
  • [DBH] libavcodec/mpegvideoencdsp.c
  • [DBH] libavcodec/ppc/Makefile
  • [DBH] libavcodec/ppc/me_cmp.c
  • [DBH] libavcodec/svq1enc.c
  • [DBH] libavcodec/svq1enc.h
  • [DBH] libavcodec/utils.c
  • [DBH] libavcodec/x86/Makefile
  • [DBH] libavcodec/x86/me_cmp.asm
  • [DBH] libavcodec/x86/me_cmp_init.c

• Compile FFmpeg project for ARM in PC Linux 64-bits

  4 avril 2017, par Dang_Ho

  I want to compile a simple FFmpeg project for my Arrow Sockit Board with an arm-linux-gnueabihf architecture from my Linux-64bit PC. I don’t want to compile the project in the board directly because of my low CPU and that is not convenient for me.

  I’m using FFmpeg version 2.8.11 and this is my Makefile and my "main.c". I know, my Makefile has something wrong in it. If I command "make", it will compile depending on my PC’s architecture, I can’t use that binary file on my board. So, can someone please tell me how to do it.

  I Cross-Compiled the FFmpeg package and installed into the board. I tested all functions such as ffmpeg, ffplay. All them work. The source code folder is located to /home/hohaidang/ffmpeg-2.8.11

  #include 
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  
  
  int main(int argc, char *argv[]){
  
          av_register_all();
  
          return 0;
  
  }

  # use pkg-config for getting CFLAGS and LDLIBS
  
  FFMPEG_LIBS=    libavdevice                        \
  
                  libavformat                        \
  
                  libavfilter                        \
  
                  libavcodec                         \
  
                  libswresample                      \
  
                  libswscale                         \
  
                  libavutil                          \
  
  
  
  CFLAGS += -Wall -g
  
  CFLAGS := $(shell pkg-config --cflags $(FFMPEG_LIBS)) $(CFLAGS)
  
  LDLIBS := $(shell pkg-config --libs $(FFMPEG_LIBS)) $(LDLIBS)
  
  
  
  EXAMPLES=       main
  
  
  
  OBJS=$(addsuffix .o,$(EXAMPLES))
  
  
  
  # the following examples make explicit use of the math library
  
  avcodec:           LDLIBS += -lm
  
  decoding_encoding: LDLIBS += -lm
  
  muxing:            LDLIBS += -lm
  
  resampling_audio:  LDLIBS += -lm
  
  
  
  .phony: all clean-test clean
  
  
  
  all: $(OBJS) $(EXAMPLES)
  
  
  
  clean-test:
  
          $(RM) test*.pgm test.h264 test.mp2 test.sw test.mpg
  
  
  
  clean: clean-test
  
          $(RM) $(EXAMPLES) $(OBJS)