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• Cannot execute ffmpeg command with Java

  12 octobre 2022, par Peter Tran

  I am trying to execute ffmpeg command to add overlay text on existing video

  


  ffmpeg command on shell which is working fine :

  


  ffmpeg -i "/Users/test/video.mp4" -vf "drawtext=text='Testing':fontcolor=white:fontsize=24:box=1:boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2" -codec:a copy "/Users/test/output.mp4"


  


  Shell OUTPUT

  


  fmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers


  


  built with Apple clang version 14.0.0 (clang-1400.0.29.102)
configuration : —prefix=/opt/homebrew/Cellar/ffmpeg/5.1.2 —enable-shared —enable-pthreads —enable-version3 —cc=clang —host-cflags= —host-ldflags= —enable-ffplay —enable-gnutls —enable-gpl —enable-libaom —enable-libbluray —enable-libdav1d —enable-libmp3lame —enable-libopus —enable-librav1e —enable-librist —enable-librubberband —enable-libsnappy —enable-libsrt —enable-libtesseract —enable-libtheora —enable-libvidstab —enable-libvmaf —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libxvid —enable-lzma —enable-libfontconfig —enable-libfreetype —enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libspeex —enable-libsoxr —enable-libzmq —enable-libzimg —disable-libjack —disable-indev=jack —enable-videotoolbox —enable-neon
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/test/video.mp4' :
...

  


  but when running above command with Java, the output video is not generated

  


  Java code

  


  @Test
public void generateVideo2() throws IOException, IOException {
    String fileNameFullPath= "/Users/test/video.mp4";
    String[] videoCmd = new String[]
            {"/bin/sh", "-c", "/opt/homebrew/Cellar/ffmpeg/5.1.2/bin/ffmpeg",
                    "-i",
                    fileNameFullPath,
                    "-vf",
                    "drawtext=text='Testing':fontcolor=white:fontsize=24:box=1:boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2",
                    "-codec:a copy",
                    "/Users/test/output.mp4"
            };
    Process processDuration = new ProcessBuilder().command(videoCmd).start();
    StringBuilder strBuild = new StringBuilder();
    try (BufferedReader processOutputReader = new BufferedReader(new InputStreamReader(processDuration.getInputStream(), Charset.defaultCharset()));) {
        String line;
        while ((line = processOutputReader.readLine()) != null) {
            strBuild.append(line).append(System.lineSeparator());
        }
        int i = processDuration.waitFor();
        System.out.println("Process exitValue: "+i);
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }
}


  


  JAVA OUTPUT

  


  Process exitValue : 1

  


  Process finished with exit code 0

  


  Does anyone have any idea ?

  


• How to encode video with ffmpeg using AMD h264_amf

  10 novembre 2022, par Ivy Growing

  Given :

  


  

  • Win10

  


  • AMD CPU

  


  • Video capturing card Avermedia Live Gamer Extreme 3

  


  • ffmpeg versions and encoders :

  


  


  >ffmpeg.exe -encoders | find "264"
ffmpeg version 5.1-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
// cut
 V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
 V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
 V....D h264_amf             AMD AMF H.264 Encoder (codec h264)
 V....D h264_mf              H264 via MediaFoundation (codec h264)
 V....D h264_nvenc           NVIDIA NVENC H.264 encoder (codec h264)
 V..... h264_qsv             H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration) (codec h264)


  


  Required to capture the video into H.264 encoded file using AMD's hardware accelerator in the CPU (AMF, or VCE).
Tried : ffmpeg -y -f dshow -rtbufsize 2002000k -framerate 30 -i video="Live Gamer EXTREME 3"  -t 00:00:10  -c:v h264_amf output.ts
Result :

  


  Input #0, dshow, from 'video=Live Gamer EXTREME 3':
  Duration: N/A, start: 88548.973998, bitrate: N/A
  Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422(tv, bt709/bt709/unknown), 1280x720, 30 fps, 30 tbr, 10000k tbn
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_amf))
Press [q] to stop, [?] for help
[h264_amf @ 000002404328c700] DLL amfrt64.dll failed to open
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


  


  For some reason ffmpeg uses resolution 1280x720... When trying to specifiy the capture card resolution the following error appears :

  


  >ffmpeg -y -f dshow -rtbufsize 2002000k -framerate 30 -video_size 3840x2160 -i video="Live Gamer EXTREME 3" -r 30 -t 00:00:10   -c:v h264_amf -f mpegts output.ts
//cut
[dshow @ 0000029d7c0f84c0] Could not set video options
video=Live Gamer EXTREME 3: I/O error


  


  This is not unique error for Avermedia card. The same error appears with Dell web cam and for Magewell.

  


  From this answer the extra flags to be used with h264_amf. I guessed the default values should be good enough. It seems something needs to be configured or initialized when using AMF/VCE.

  


  The video encoding in software (without AMF) works just fine but loads the CPU. The goal is using dedicated hardware module and release computational power of the CPU for the other apps.

  


  Command example will be appreciated.

  


• ffmpeg convert images to video and add audio in one command

  9 novembre 2022, par user2108258

  I have two commands that I would like consilidate to a 1 liner.
Here are the two queries.

  


  Here are the steps i need help

  


  

  1. create a video based on a directory of jpegs

  


  


  ffmpeg -f image2 -pix_fmt yuv420p -r 10 -s 1080x1920 -i 'Roach spray high-25263/%d.jpg' -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -crf 25 -vcodec h264 'Roach spray high.mp4' -y


  


  

  2. Merge audio with video from step 1

  


  


  ffmpeg -stream_loop -1 -i 'Roach spray high.mp4' -i '/beats/2022/Roach spray high.mp3' -shortest -map 0:v:0 -map 1:a:0 '/videos/Roach spray high/Roach spray high.mp4' -y


  


  Is there a way to combine these two steps into 1 ?