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  • FFmpeg - record from stream terminating unexpectedly using kokorin/Jaffree ffmpeg wrapper for Java

    18 avril, par pyrmon

    I am programming a Spring Boot Application using Maven and Java 21. I am trying to record a stream from a url and save it to a mkv file. I intend to do this with kokorin/Jaffree in version 2023.09.10. The recording seems to work ok, however longer videos are terminating unexpectedly. Sometimes after 5 minutes, other times an hour or even longer. Sometimes with Exit Code 0 and sometimes with 1.

    


    I have implemented the recording like this :

    


    @Override
    public void startRecording(RecordingSchedule recordingSchedule) {
        logger.info("Starting recording for schedule with filename {}", recordingSchedule.getFileName());

        String m3uUrl = recordingSchedule.getM3uUrl();
        LocalDateTime endTime = timeUtils.parseStringToLocalDateTime(recordingSchedule.getEndTime());
        LocalDateTime stopTime = endTime.plusSeconds(20);
        String timeToRecord = timeUtils.calculateTimeToRecord(stopTime);
        Path outputPath = Paths.get("/recordings/" + recordingSchedule.getFileName());

        try {
            FFmpeg.atPath()
                  .addInput(UrlInput.fromUrl(m3uUrl))
                  .addArgument("-xerror")
                  .addArguments("-reconnect", "5")
                  .addArguments("-reconnect_streamed", "5")
                  .addArguments("-reconnect_delay_max", "20")
                  .addArguments("-t", timeToRecord)
                  .addArguments("-c", "copy")
                  .addOutput(
                      UrlOutput.toPath(outputPath))
                  .setLogLevel(LogLevel.WARNING)
                  .execute();
            logger.info("Recording complete. Output file: {}", outputPath.toAbsolutePath());
        } catch (Exception e) {
            logger.error("Error recording M3U stream {}: {}", recordingSchedule.getFileName(), e.getMessage());
        }
    }


    


    And I am calling the method like this :
executorConfig.executorService().submit(() -> ffmpegService.startRecording(recording));

    


    Any ideas what I am doing wrong ?
Here are the log lines at the beginning and end of recording of the past two attempts :

    


    2024-04-18T00:54:48.689+02:00  INFO 1 --- [pool-2-thread-1] m.s.r.service.impl.FfmpegServiceImpl     : Starting recording for schedule with filename Example1.mkv
2024-04-18T00:54:48.697+02:00  WARN 1 --- [pool-2-thread-1] c.github.kokorin.jaffree.ffmpeg.FFmpeg   : ProgressListener isn't set, progress won't be reported
2024-04-18T00:54:48.698+02:00  INFO 1 --- [pool-2-thread-1] c.g.k.jaffree.process.ProcessHandler     : Command constructed:
ffmpeg -loglevel level+warning -i http://example.stream.url.com -n -xerror -reconnect 5 -reconnect_streamed 5 -reconnect_delay_max 20 -t 10771 -c copy /recordings/Example1.mkv
2024-04-18T00:54:48.698+02:00  INFO 1 --- [pool-2-thread-1] c.g.k.jaffree.process.ProcessHandler     : Starting process: ffmpeg
2024-04-18T00:54:48.701+02:00  INFO 1 --- [pool-2-thread-1] c.g.k.jaffree.process.ProcessHandler     : Waiting for process to finish
2024-04-18T01:31:02.633+02:00  WARN 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [h264 @ 0x559cd22dd940] [warning] Increasing reorder buffer to 2
2024-04-18T01:31:02.633+02:00  INFO 1 --- [pool-2-thread-1] c.g.k.jaffree.process.ProcessHandler     : Process has finished with status: 0
2024-04-18T01:31:02.734+02:00  INFO 1 --- [pool-2-thread-1] m.s.r.service.impl.FfmpegServiceImpl     : Recording complete. Output file: /recordings/Example1.mkv

2024-04-18T03:54:48.678+02:00  INFO 1 --- [pool-2-thread-2] m.s.r.service.impl.FfmpegServiceImpl     : Starting recording for schedule with filename Example2.mkv
2024-04-18T03:54:48.678+02:00  WARN 1 --- [pool-2-thread-2] c.github.kokorin.jaffree.ffmpeg.FFmpeg   : ProgressListener isn't set, progress won't be reported
2024-04-18T03:54:48.678+02:00  INFO 1 --- [pool-2-thread-2] c.g.k.jaffree.process.ProcessHandler     : Command constructed:
ffmpeg -loglevel level+warning -i http://example.stream.url.com/ -n -xerror -reconnect 5 -reconnect_streamed 5 -reconnect_delay_max 20 -t 11431 -c copy /recordings/Example2.mkv
2024-04-18T03:54:48.678+02:00  INFO 1 --- [pool-2-thread-2] c.g.k.jaffree.process.ProcessHandler     : Starting process: ffmpeg
2024-04-18T03:54:48.679+02:00  INFO 1 --- [pool-2-thread-2] c.g.k.jaffree.process.ProcessHandler     : Waiting for process to finish
2024-04-18T04:57:22.256+02:00  WARN 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [h264 @ 0x55707ba988c0] [warning] Increasing reorder buffer to 3
2024-04-18T04:58:47.455+02:00 ERROR 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [NULL @ 0x55707ba988c0] [error] Picture timing SEI payload too large
2024-04-18T04:58:47.456+02:00 ERROR 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [NULL @ 0x55707ba988c0] [error] non-existing PPS 1 referenced
2024-04-18T04:58:47.456+02:00  WARN 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [matroska @ 0x55707ba9a380] [warning] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
2024-04-18T04:58:47.456+02:00 ERROR 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [matroska @ 0x55707ba9a380] [error] Can't write packet with unknown timestamp
2024-04-18T04:58:47.463+02:00 ERROR 1 --- [         StdErr] c.g.k.jaffree.process.BaseStdReader      : [error] av_interleaved_write_frame(): Invalid argument
2024-04-18T04:58:47.463+02:00  INFO 1 --- [pool-2-thread-2] c.g.k.jaffree.process.ProcessHandler     : Process has finished with status: 1
2024-04-18T04:58:47.564+02:00 ERROR 1 --- [pool-2-thread-2] m.s.r.service.impl.FfmpegServiceImpl     : Error recording M3U stream Example2.mkv: Process execution has ended with non-zero status: 1. Check logs for detailed error message.


    


    They were supposed to run nearly 3 hours and the other one over 3 hours. And with the timestamps you can see that they are not running nearly as long.
Thank you for your help !

    


  • FFmpeg dynamic cropping using sendcmd correct syntax ?

    19 avril, par Sulli

    I'm trying to dynamically crop a video using FFmpeg's sendcmd filter based on coordinates specified in a text file, but the crop commands do not seem to be taking effect. Here's the format of the commands I've tried and the corresponding FFmpeg command I'm using.

    


    Following the documentation https://ffmpeg.org/ffmpeg-filters.html#sendcmd_002c-asendcmd, commands in the text file (coordinates.txt) like this :

    


    0.05 [enter] crop w=607:h=1080:x=0:y=0;
0.11 [enter] crop w=607:h=1080:x=0:y=0;
...


    


    Ffmpeg command :

    


    ffmpeg -i '10s.mp4' -filter_complex "[0:v]sendcmd=f=coordinates.txt" -c:v libx264 -c:a copy -r 30 output.mp4


    


    This doesn’t seem to do anything.

    


    And with the commands in the text file (coordinates.txt) like this :

    


    0.05    crop w 607, crop h 1080, crop x 0, crop y 0;
0.11    crop w 607, crop h 1080, crop x 0, crop y 0;
...


    


    Ffmpeg command :

    


    ffmpeg -i '10s.mp4' -filter_complex "[0:v]sendcmd=f=coordinates.txt,crop" -c:v libx264 -c:a copy -r 30 output.mp4


    


    (following this answer https://stackoverflow.com/a/67508233/1967110)

    


    This one does something, but something very messy. It looks like it crops at the correct x, but does not take into account the y, w or h, and it puts the crop at the right side of the input video.

    


    Edit : what I’m trying to do is create a 607x1080 (portrait format, 9:16) video from a 1920x1080 video, with the x parameter varying across time (imagine sliding horizontally a 9:16 frame over a 16:9 video). So fixed w, h and y, just x varying.

    


    I’m using this ffmpeg version :

    


    ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --prefix=/home/ffmpeg-builder/release --pkg-config-flags=--static --extra-libs=-lm --disable-doc --disable-debug --disable-shared --disable-ffprobe --enable-static --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avfilter --enable-filters --enable-nvenc --enable-nvdec --enable-cuvid --toolchain=hardened --disable-stripping --enable-opengl --pkgconfigdir=/home/ffmpeg-builder/release/lib/pkgconfig --extra-cflags='-I/home/ffmpeg-builder/release/include -static-libstdc++ -static-libgcc ' --extra-ldflags='-L/home/ffmpeg-builder/release/lib -fstack-protector -static-libstdc++ -static-libgcc ' --extra-cxxflags=' -static-libstdc++ -static-libgcc ' --extra-libs='-ldl -lrt -lpthread' --enable-ffnvcodec --enable-gmp --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libkvazaar --enable-libmp3lame --enable-libopus --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libshine --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtheora --enable-libvidstab --ld=g++ --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-openssl --enable-zlib --enable-nonfree --extra-libs=-lpthread --enable-pthreads --extra-libs=-lgomp


    


  • Cutting sections with -ss and -t is not frame accurate

    16 avril, par Théo Champion

    I'm using ffmpeg 6.0 to extract small sections from longer videos. According to the doc i can use the -ss option to specify the start time and the -t option to specify the duration and this should result in frame accurate cuts (since FFmpeg 2.1).

    


    However, in my testing i found that the cuts are not frame accurate. I'm using the following command :

    


    ffmpeg -ss 10 -i ffmpeg -ss 10 -i https://storage.googleapis.com/klap-assets/Frame%20Counter%20%5B4K%2C%2060%20FPS%5D%20%E2%80%93%200100.mp4   -t 10 -y -vcodec libx264 -acodec aac -movflags +faststart out2.mp4   -t 10 -y -vcodec libx264 -acodec aac -movflags +faststart out.mp4


    


    This result in a video that start at 9:57 (-2 frames) and ends at 19:57 (-2 frames) instead of 10:00 and 20:00.

    


    Also weird is that ffprobe on the resulting video show its duration being exactly 10 seconds.

    


    FFprobe of the resulting video :

    


    ffprobe version 6.0 Copyright (c) 2007-2023 the FFmpeg developers
  built with Apple clang version 14.0.0 (clang-1400.0.29.202)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --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      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf60.3.100
  Duration: 00:00:10.00, start: 0.000000, bitrate: 303 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 287 kb/s, 60 fps, 60 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : ISO Media file produced by Google Inc.
      vendor_id       : [0][0][0][0]
      encoder         : Lavc60.3.100 libx264
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
    Metadata:
      handler_name    : ISO Media file produced by Google Inc.
      vendor_id       : [0][0][0][0]


    


    I've done some testing with other videos and results are never totally frame accurate.

    


    What am i missing here ? How can i get frame accurate cuts with FFmpeg ?

    


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