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• avcodec/qpeg : Optimize long runs in qpeg_decode_intra() not spanning a full row

  7 janvier 2019, par Michael Niedermayer

  avcodec/qpeg : Optimize long runs in qpeg_decode_intra() not spanning a full row
  Fixes : Timeout
  
  Fixes : 11354/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QPEG_fuzzer-5766275943366656
  Before : Executed clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QPEG_fuzzer-5766275943366656 in 9470 ms
  
  After : Executed clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QPEG_fuzzer-5766275943366656 in  134 ms
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Reviewed-by : Paul B Mahol <onemda@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/qpeg.c

• FFmpeg4 android Applying Overlay (watermark) taking too long

  13 janvier 2019, par Web Developer

  I’m using ffmpeg4 on android (Java) to apply overlay/watermark on the bottom left corner of the recorded video that is saved in the SD CARD.

  The video recording has maximum duration of 59 seconds. The problem that I’m facing is that I’m applying water through this command of ffmpeg4

  String[] complexCommand1 = new String[]"ffmpeg", "-y", "-i",
  "input.mp4", "-strict", "experimental", "-c:v", "libx264", "-preset",
  "ultrafast", "-vf", "movie=/water.png [watermark] ; [in][watermark] overlay=main_w-overlay_w-", "10:10", " [out]", "-s", "320x480", "-aspect",
  "2:3", "-r", "30", "-b:v", "500k",
  "output.mp4"  ;

  I’ve reduced the video resolution to 320x480 after the conversion and 480p to recorded video that is provided as input to this command but still the processing time is around 40 seconds.

  Can someone provide me workaround this to reduce this processing time.

  or what should I do to reduce this processing time. I’ve researched a lot on this and found some GitHub issues link and tried their solutions but none of them seemed to work for me.

• FFmpeg : Documented method of changing frame rate not working

  5 février 2019, par Chirag Arora

  According to the FFmpeg documentation over here, I can change frame rate of a video using :

  ffmpeg -i input.mkv -c:v copy -vsync drop -r 59.94 output.mkv

  but all I am getting is an av_interleaved_write_frame(): Invalid argument error on my machine. What am I doing wrong ?

  Here is the log :

  ffmpeg -i noaudio.mp4 -c:v copy -vsync drop -r 160 lapse.mp4
  
  
  
  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1_1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'noaudio.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:12:31.45, start: 0.000000, bitrate: 59950 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 59948 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  File 'lapse.mp4' already exists. Overwrite ? [y/N] y
  
  Output #0, mp4, to 'lapse.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 59948 kb/s, 29.97 fps, 29.97 tbr, 10240 tbn, 160 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 0x7fec5400e000] 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
  
  av_interleaved_write_frame(): Invalid argument
  
  frame=    1 fps=0.0 q=-1.0 Lsize=       0kB time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  video:794kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Conversion failed!