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• How to extract orientation information from videos ?

  23 décembre 2016, par Sid

  After surfing through tons of documentation on the web it seems that the iPhone always shoots the video at a 480x360 aspect ratio and applies a transformation matrix on the video track. (480x360 may change but its always the same for a given device)

  Here is a way of modifying the ffmpeg source within a iOS project and accessing the matrix http://www.seqoy.com/correct-orientation-for-iphone-recorded-movies-with-ffmpeg/

  Here is a cleaner way of finding the transformation matrix in iOS-4
  how to detect (iphone sdk) if a video file was recorded in portrait orientation, or landscape

  How can the orientation of the video be extracted in either of the options below -
  
   iOS 3.2
  
   ffmpeg (through the command line server side)
  
   ruby
  

  Any help will be appreciated.

• mips : add support for R6

  24 février 2016, par Vicente Olivert Riera

  mips : add support for R6
  Understanding the mips32r6 and mips64r6 ISAs in the configure script is
  
  not enough. In order to have full support for MIPS R6 in FFmpeg we need
  
  to be able to build it, and for that we need to make sure we don’t use
  
  incompatible assembler code which makes the build fail. Ifdefing the
  
  offending code is sufficient to fix the problem.
  Signed-off-by : Vicente Olivert Riera <Vincent.Riera@imgtec.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/mips/aaccoder_mips.c
  • [DH] libavcodec/mips/aacdec_mips.h
  • [DH] libavcodec/mips/aacpsdsp_mips.c
  • [DH] libavcodec/mips/aacpsy_mips.h
  • [DH] libavcodec/mips/aacsbr_mips.c
  • [DH] libavcodec/mips/aacsbr_mips.h
  • [DH] libavcodec/mips/ac3dsp_mips.c
  • [DH] libavcodec/mips/acelp_filters_mips.c
  • [DH] libavcodec/mips/acelp_vectors_mips.c
  • [DH] libavcodec/mips/amrwbdec_mips.c
  • [DH] libavcodec/mips/amrwbdec_mips.h
  • [DH] libavcodec/mips/celp_filters_mips.c
  • [DH] libavcodec/mips/celp_math_mips.c
  • [DH] libavcodec/mips/compute_antialias_float.h
  • [DH] libavcodec/mips/fft_mips.c
  • [DH] libavcodec/mips/iirfilter_mips.c
  • [DH] libavcodec/mips/lsp_mips.h
  • [DH] libavcodec/mips/mpegaudiodsp_mips_fixed.c
  • [DH] libavcodec/mips/mpegaudiodsp_mips_float.c
  • [DH] libavcodec/mips/sbrdsp_mips.c
  • [DH] libavutil/mips/float_dsp_mips.c

• Working directory in Dockerfile is not what is expected to be

  31 mai 2022, par user1765862

  I have following Dockerfile

  


  FROM public.ecr.aws/lambda/dotnet:6 AS base

FROM mcr.microsoft.com/dotnet/sdk:6.0-bullseye-slim as build
WORKDIR /src
COPY ["AWSServerless.csproj", "AWSServerless/"]
RUN dotnet restore "AWSServerless/AWSServerless.csproj"

WORKDIR "/src/AWSServerless"
COPY . .
RUN dotnet build "AWSServerless.csproj" --configuration Release --output /app/build

FROM build AS publish

RUN apt-get update && apt-get install -y apt-utils libgdiplus libc6-dev

RUN apt-get install -y ffmpeg

RUN dotnet publish "AWSServerless.csproj" \
            --configuration Release \ 
            --runtime linux-x64 \
            --self-contained false \ 
            --output /app/publish \
            -p:PublishReadyToRun=true  

FROM base AS final
WORKDIR /var/task

CMD ["AWSServerless::AWSServerless.LambdaEntryPoint::FunctionHandlerAsync"]
COPY --from=publish /app/publish .


  


  As per ffmpeg docs In order to use ffmpeg I need to set its binary folder
for example with

  


  {
  "BinaryFolder": "/var/task",
  "TemporaryFilesFolder": "/tmp"
}


  


  Error

  


  


  An error occurred trying to start process './ffmpeg' with working
directory '/var/task'. No such file or directory

  


  


  What is the working directory here ?

  


  Update :
Actual error is being thrown when I try to execute following command (FFMpegCore package) from my api controller

  


  public class MyController : ControllerBase&#xA;{&#xA;    public async Task<string> Get()&#xA;    {    &#xA;         await FFMpegArguments&#xA;               .FromPipeInput(new StreamPipeSource(myfile))&#xA;               .OutputToPipe(new StreamPipeSink(outputStream), options => options&#xA;                  .WithVideoCodec("vp9")&#xA;                  .ForceFormat("webm"))&#xA;                  .ProcessAsynchronously();&#xA;         ...&#xA;    }    &#xA;}&#xA;</string>