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• FFmpeg -ss parameter is the video duration, Output file is empty

  16 avril 2024, par noun nil

  The main function is to obtain the corresponding video frame based on the input seconds.Before processing, the duration of the video will be obtained to determine whether the input is within the duration range of the video. If so, the corresponding instruction will be executed.

  


  > ffprobe input.mp4
  ...
  Duration: 00:00:28.05, start: 0.000000, bitrate: 1136 kb/s


  


  > ffmpeg -ss 00:00:28 -i input.mp4 -frames:v 1 output.png
 ffmpeg version 7.0 Copyright (c) 2000-2024 the FFmpeg developers
  built with Apple clang version 15.0.0 (clang-1500.3.9.4)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/7.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --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-libopenvino --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      59.  8.100 / 59.  8.100
  libavcodec     61.  3.100 / 61.  3.100
  libavformat    61.  1.100 / 61.  1.100
  libavdevice    61.  1.100 / 61.  1.100
  libavfilter    10.  1.100 / 10.  1.100
  libswscale      8.  1.100 /  8.  1.100
  libswresample   5.  1.100 /  5.  1.100
  libpostproc    58.  1.100 / 58.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    description     : Packed by Bilibili XCoder v2.0.2
  Duration: 00:00:28.05, start: 0.000000, bitrate: 1136 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 720x1280 [SAR 1:1 DAR 9:16], 1005 kb/s, 25.27 fps, 25.25 tbr, 16k tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> png (native))
Press [q] to stop, [?] for help
[swscaler @ 0x1187a0000] [swscaler @ 0x110e48000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e58000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e68000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e78000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e88000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e98000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110ea8000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110eb8000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110ec8000] No accelerated colorspace conversion found from yuv420p to rgb24.
[vost#0:0/png @ 0x12ce06840] No filtered frames for output stream, trying to initialize anyway.
Output #0, image2, to 'output.png':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    description     : Packed by Bilibili XCoder v2.0.2
    encoder         : Lavf61.1.100
  Stream #0:0(und): Video: png, rgb24(progressive), 720x1280 [SAR 1:1 DAR 9:16], q=2-31, 200 kb/s, 25.25 fps, 16k tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.3.100 png
[out#0/image2 @ 0x600000e983c0] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown
[out#0/image2 @ 0x600000e983c0] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used)
frame=    0 fps=0.0 q=0.0 Lsize=N/A time=N/A bitrate=N/A speed=N/A    



  


  -ss 00:00:28 within the video duration range, but still cannot obtain frames...

  


  -ss 00:00:27 Can obtain video frames

  


• JavaCV error AAC with no global headers is currently not supported

  19 juillet 2023, par zhoutian

  I'm trying to transcode dhav (one of the container format) to RTSP By JavaCV(FFmpegFrameGrabber + FFmpegFrameRecorder) , It's fine when i transcoding dhav to RTMP , but when I change to RTSP ,error occurred :

  


  
Error: [rtsp @ 0000002318df7c30] AAC with no global headers is currently not supported.

Exception in thread "pool-1-thread-2" java.lang.RuntimeException: org.bytedeco.javacv.FFmpegFrameRecorder$Exception: avformat_write_header error() error -1094995529: Could not write header to 'rtsp://127.0.0.1:8554/myapp/orange2' (For more details, make sure FFmpegLogCallback.set() has been called.)
    at org.jfjy.jvc.GetBytes2PipedStreamAndPushRTMP$2.run(GetBytes2PipedStreamAndPushRTMP.java:116)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: org.bytedeco.javacv.FFmpegFrameRecorder$Exception: avformat_write_header error() error -1094995529: Could not write header to 'rtsp://127.0.0.1:8554/myapp/orange2' (For more details, make sure FFmpegLogCallback.set() has been called.)
    at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:969)
    at org.bytedeco.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:437)
    at org.bytedeco.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:432)
    at org.jfjy.jvc.GetBytes2PipedStreamAndPushRTMP.grabAndPush(GetBytes2PipedStreamAndPushRTMP.java:215)
    at org.jfjy.jvc.GetBytes2PipedStreamAndPushRTMP$2.run(GetBytes2PipedStreamAndPushRTMP.java:100)
    ... 3 more


  


  After googled , I tried fowllowing :

  


  


  • set avFormatContext.flags(avformat.AVFMT_GLOBALHEADER); no use

    


  


  • add "-flags +global_header" or "-rtpflags latm" to command line, but I don't know how to do this in JavaCV。

    


  


  • set recorder.setAudioOption("flags", "+global_header"); no use

    


  


  • set       recorder.setAudioOption("flags", "global_header");  recorder.setVideoOption("flags", "global_header"); , no use

    


  


  


  could someone guide me on this appreciate

  


  about the dhav (a part of ) ,mabay can help :

  


  Input #0, dhav, from '.\videostream':
  Duration: 00:00:25.00, start: 1689678599.000000, bitrate: 2360 kb/s
  Stream #0:0: Audio: pcm_s16le, 16000 Hz, 1 channels, s16, 256 kb/s
  Stream #0:1: Video: h264 (High), yuvj420p(pc, bt470bg/bt470bg/bt709), 720x1280, 25 fps, 50 tbr, 1k tbn


  


  key code is :

  


  public static synchronized void grabAndPush(InputStream inputStream, String pushAddress, String pushPotocol) throws Exception {
        avutil.av_log_set_level(AV_LOG_DEBUG);
        FFmpegLogCallback.set();

        FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputStream,0);

        long startTime = System.currentTimeMillis();
      
        grabber.start();

     

        AVFormatContext avFormatContext = grabber.getFormatContext();


        int streamNum = avFormatContext.nb_streams();

        if (streamNum < 1) {
            log.error("no media！");
            return;
        }

        int frameRate = (int) grabber.getVideoFrameRate();
        if (0 == frameRate) {
            frameRate = 15;
        }
        log.info("frameRate[{}]，duration[{}]secs，number streams[{}]",
                frameRate,
                avFormatContext.duration() / 1000000,
                avFormatContext.nb_streams());

        for (int i = 0; i < streamNum; i++) {
            AVStream avStream = avFormatContext.streams(i);
            AVCodecParameters avCodecParameters = avStream.codecpar();
            log.info("stream index[{}]，codec type[{}]，codec ID[{}]", i, avCodecParameters.codec_type(), avCodecParameters.codec_id());
        }

        int frameWidth = grabber.getImageWidth();
        int frameHeight = grabber.getImageHeight();
        int audioChannels = grabber.getAudioChannels();

        log.info("frameWidth[{}]，frameHeight[{}]，audioChannels[{}]",
                frameWidth,
                frameHeight,
                audioChannels);

        FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(pushAddress,
                frameWidth,
                frameHeight,
                audioChannels);

        recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
        recorder.setInterleaved(true);

        switch (pushPotocol) {
            case "rtsp" -> {
                recorder.setFormat("rtsp");
            }
            case "rtmp" -> {
                recorder.setFormat("flv");
            }
        }
        log.info("push protocol:{}| grabber format:{} | recorder format:{}",pushPotocol,grabber.getFormat(),recorder.getFormat());

        recorder.setFrameRate(frameRate);
        recorder.setAudioCodec(AV_CODEC_ID_AAC);
        log.info("grabber audio codec name :{}|recorder audio codec name :{}",grabber.getAudioCodecName(),recorder.getAudioCodecName());

        recorder.setGopSize(frameRate * 2);

        recorder.setAudioChannels(grabber.getAudioChannels());

        startTime = System.currentTimeMillis();


        avFormatContext.max_interleave_delta(0);
        avFormatContext.flags(avformat.AVFMT_TS_NONSTRICT);
        recorder.setTimestamp(0);
  
        recorder.start(avFormatContext);

     

        Frame frame;


        int videoFrameNum = 0;
        int audioFrameNum = 0;
        int dataFrameNum = 0;
    
        AVPacket packet;
        long lastDTS = 0;
        while ((packet = grabber.grabPacket()) != null) {
            if (packet.pts() == AV_NOPTS_VALUE) {
                if (packet.dts() != AV_NOPTS_VALUE) {
                    packet.pts(packet.dts());
                    lastDTS = packet.dts();
                } else {
                    packet.pts(lastDTS + 1);
                    packet.dts(packet.pts());
                    lastDTS = packet.pts();
                }
            } else {
                if (packet.dts() != AV_NOPTS_VALUE) {
                    if (packet.dts() < lastDTS) {
                        packet.dts(lastDTS + 1);
                    }
                    lastDTS = packet.dts();
                } else {
                    packet.dts(packet.pts());
                    lastDTS = packet.dts();
                }
            }

            if (packet.pts() < packet.dts()) {
                packet.pts(packet.dts());
            }


            recorder.recordPacket(packet);
            Thread.sleep(1);
        }

        log.info("push complete，videoFrameNum[{}]，audioFrameNum[{}]，dataFrameNum[{}]，耗时[{}]秒",
                videoFrameNum,
                audioFrameNum,
                dataFrameNum,
                (System.currentTimeMillis() - startTime) / 1000);

   
        recorder.close();
        grabber.close();
    }


  


• aarch64 : hevc : Produce plain neon versions of qpel_uni_hv

  22 mars 2024, par Martin Storsjö

  aarch64 : hevc : Produce plain neon versions of qpel_uni_hv
  As the plain neon qpel_h functions process two rows at a time,
  
  we need to allocate storage for h+8 rows instead of h+7.
  By allocating storage for h+8 rows, incrementing the stack
  
  pointer won't end up at the right spot in the end. Store the
  
  intended final stack pointer value in a register x14 which we
  
  store on the stack.
  AWS Graviton 3 :
  
  put_hevc_qpel_uni_hv4_8_c : 384.2
  
  put_hevc_qpel_uni_hv4_8_neon : 127.5
  
  put_hevc_qpel_uni_hv4_8_i8mm : 85.5
  
  put_hevc_qpel_uni_hv6_8_c : 705.5
  
  put_hevc_qpel_uni_hv6_8_neon : 224.5
  
  put_hevc_qpel_uni_hv6_8_i8mm : 176.2
  
  put_hevc_qpel_uni_hv8_8_c : 1136.5
  
  put_hevc_qpel_uni_hv8_8_neon : 216.5
  
  put_hevc_qpel_uni_hv8_8_i8mm : 214.0
  
  put_hevc_qpel_uni_hv12_8_c : 2259.5
  
  put_hevc_qpel_uni_hv12_8_neon : 498.5
  
  put_hevc_qpel_uni_hv12_8_i8mm : 410.7
  
  put_hevc_qpel_uni_hv16_8_c : 3824.7
  
  put_hevc_qpel_uni_hv16_8_neon : 670.0
  
  put_hevc_qpel_uni_hv16_8_i8mm : 603.7
  
  put_hevc_qpel_uni_hv24_8_c : 8113.5
  
  put_hevc_qpel_uni_hv24_8_neon : 1474.7
  
  put_hevc_qpel_uni_hv24_8_i8mm : 1351.5
  
  put_hevc_qpel_uni_hv32_8_c : 14744.5
  
  put_hevc_qpel_uni_hv32_8_neon : 2599.7
  
  put_hevc_qpel_uni_hv32_8_i8mm : 2266.0
  
  put_hevc_qpel_uni_hv48_8_c : 32800.0
  
  put_hevc_qpel_uni_hv48_8_neon : 5650.0
  
  put_hevc_qpel_uni_hv48_8_i8mm : 5011.7
  
  put_hevc_qpel_uni_hv64_8_c : 57856.2
  
  put_hevc_qpel_uni_hv64_8_neon : 9863.5
  
  put_hevc_qpel_uni_hv64_8_i8mm : 8767.7
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/aarch64/hevcdsp_init_aarch64.c
  • [DH] libavcodec/aarch64/hevcdsp_qpel_neon.S