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• Where can I find my output video file after execution of ffmpeg command

  7 août 2019, par Giri Aakula

  I run this command to capture my screen

  ffmpeg -video_size 1366x768 -framerate 60 -f gdigrab -i desktop -c:v libx264 -crf 0 -preset ultrafast output.mp4

  I didn’t find the output.mp4 file anywhere in my HDD. I checked in the bin folder of ffmpeg it is not there.
  I searched the whole PC I didn’t find it anywhere. Can anyone please help me out to find the file.
  The console output is

  C:\Users\USER>ffmpeg -video_size 1366x768 -framerate 60 -f gdigrab -i desktop -c:v libx264 -crf 0 -preset ultrafast output.mp4
  
  ffmpeg version N-94405-g43891ea8ab Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.1.1 (GCC) 20190716
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 32.100 / 56. 32.100
  
    libavcodec     58. 55.100 / 58. 55.100
  
    libavformat    58. 30.100 / 58. 30.100
  
    libavdevice    58.  9.100 / 58.  9.100
  
    libavfilter     7. 58.100 /  7. 58.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  [gdigrab @ 0000020d04e3b280] Capturing whole desktop as 1366x768x32 at (0,0)
  
  [gdigrab @ 0000020d04e3b280] Stream #0: not enough frames to estimate rate; consider increasing probesize
  
  Input #0, gdigrab, from 'desktop':
  
    Duration: N/A, start: 1565202714.962639, bitrate: 2014274 kb/s
  
      Stream #0:0: Video: bmp, bgra, 1366x768, 2014274 kb/s, 60 fps, 1000k tbr, 1000k tbn, 1000k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (bmp (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0000020d04e3edc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 0000020d04e3edc0] profile High 4:4:4 Predictive, level 4.2, 4:4:4, 8-bit
  
  [libx264 @ 0000020d04e3edc0] 264 - core 157 r2970 5493be8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf58.30.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1366x768, q=-1--1, 60 fps, 15360 tbn, 60 tbc
  
      Metadata:
  
        encoder         : Lavc58.55.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  More than 1000 frames duplicated   5632kB time=00:00:19.86 bitrate=2322.4kbits/s dup=981 drop=0 speed=1.01x
  
  More than 10000 frames duplicated 53504kB time=00:03:39.21 bitrate=1999.4kbits/s dup=9978 drop=0 speed=   1x
  
  frame=58906 fps= 60 q=-1.0 Lsize=  234800kB time=00:16:21.75 bitrate=1959.2kbits/s dup=45257 drop=0 speed=   1x
  
  video:234566kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.099927%
  
  [libx264 @ 0000020d04e3edc0] frame I:236   Avg QP: 0.00  size:230265
  
  [libx264 @ 0000020d04e3edc0] frame P:58670 Avg QP: 0.00  size:  3168
  
  [libx264 @ 0000020d04e3edc0] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 0000020d04e3edc0] mb P  I16..4: 52.9%  0.0%  0.0%  P16..4:  0.0%  0.0%  0.0%  0.0%  0.0%    skip:47.1%
  
  [libx264 @ 0000020d04e3edc0] coded y,u,v intra: 0.2% 0.2% 0.2% inter: 0.0% 0.0% 0.0%
  
  [libx264 @ 0000020d04e3edc0] i16 v,h,dc,p: 100%  0%  0%  0%
  
  [libx264 @ 0000020d04e3edc0] kb/s:1957.25

• ffmpeg 4.1.4 wav to mp3 error who can help me

  23 août 2019, par yang jia

  [swscaler @ 0xc946d000] deprecated pixel format used, make sure you did set range correctly

  [mp3 @ 0xc9621600] Frame rate very high for a muxer not efficiently supporting it.

  Please consider specifying a lower framerate, a different muxer or -vsync 2

  [auto_resampler_0 @ 0xd8e73be0] [SWR @ 0xc8058000] Output channel layout ’6 channels (FLC+BC+SL+SR+TC+TFL)’ is not supported

  [auto_resampler_0 @ 0xd8e73be0] Failed to configure output pad on auto_resampler_0

  Error reinitializing filters !

  Failed to inject frame into filter network : Invalid argument
  Error while processing the decoded data for stream #0:0
  --------- beginning of crash
  2019-02-26 16:04:58.368 27737-27737/com.blplayer.jbl.blplayer A/libc : Fatal signal 7 (SIGBUS), code 1, fault addr 0xc5ca in tid 27737 (er.jbl.blplayer)

  cmd

  ffmpeg -i test.wav -acodec libmp3lame -ar 8000 -ac 2 -y wav2mp3.mp3

   ![enter image description here]this is the log(https://i.stack.imgur.com/Kjs1Q.png)

• The duration of the combined video with FFmpeg becomes 0

  24 août 2019, par sido

  I am developing an app for Android by Unity.
  When I merge video and audio with FFmpeg, the duration of the output video file is 0 though it can be played back normally.

  I tried to set duration when merging, but it didn’t work.

  The commands being executed are as follows :

  -y -i /storage/emulated/0/Android/data/jp.ne.company.app/files/Record/20190824122116_video.mp4 -i /storage/emulated/0/Android/data/jp.ne.company.app/files/Record/20190824122116_audio.mp3 -t 3 -c copy -map 0:v -map 1:a -shortest /storage/emulated/0/Android/data/jp.ne.company.app/files/Record/20190824122116_merged.mp4

  I expected that the duration of the merged file was the value set in MovieTime, but the duration of the actually merged file was 0.

  The log is as follows :

  Started
  
  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (GCC)
  
    configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/jp.ne.company.app/files/Record/20190824122116_video.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2019-08-24 03:21:20
  
      com.android.version: 7.0
  
    Duration: 00:00:03.65, start: 0.000000, bitrate: 2821 kb/s
  
      Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 360x640, 2814 kb/s, SAR 1:1 DAR 9:16, 59.42 fps, 59.94 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        creation_time   : 2019-08-24 03:21:20
  
        handler_name    : VideoHandle
  
  [mp3 @ 0xed92f600] Skipping 0 bytes of junk at 880.
  
  Input #1, mp3, from '/storage/emulated/0/Android/data/jp.ne.company.app/files/Record/20190824122116_audio.mp3':
  
    Metadata:
  
      encoder         : Lavf57.25.100
  
    Duration: 00:00:03.55, start: 0.025057, bitrate: 257 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc57.24
  
  Output #0, mp4, to '/storage/emulated/0/Android/data/jp.ne.company.app/files/Record/20190824122116_merged.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      com.android.version: 7.0
  
      encoder         : Lavf57.25.100
  
      Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 360x640 [SAR 1:1 DAR 9:16], q=2-31, 2814 kb/s, 59.42 fps, 59.94 tbr, 90k tbn, 90k tbc (default)
  
      Metadata:
  
        creation_time   : 2019-08-24 03:21:20
  
        handler_name    : VideoHandle
  
      Stream #0:1: Audio: mp3 (i[0][0][0] / 0x0069), 44100 Hz, stereo, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc57.24
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  178 fps=0.0 q=-1.0 Lsize=    1098kB time=00:00:03.00 bitrate=2992.8kbits/s speed= 122x    
  
  video:997kB audio:95kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.534772%