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• 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%

• ffmpeg 4.1.4 wav to mp3 error of "deprecated pixel format used" [on hold]

  26 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

  This is the log :

  

  then on Mac it success egg
  ffmpeg -i input.wav -vn -ar 44100 -ac 2 -b:a 192k output.mp3

  Guessed Channel Layout for Input Stream #0.0 : stereo
  Input #0, wav, from ’input.wav’ :
  Metadata :
  encoder : Lavf58.20.100
  Duration : 00:02:08.29, bitrate : 256 kb/s
  Stream #0:0 : Audio : pcm_s16le (1[0][0][0] / 0x0001), 8000 Hz, stereo, s16, 256 kb/s
  Stream mapping :
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp3 (libmp3lame))

  Output #0, mp3, to ’output.mp3’ :
  Metadata :
  TSSE : Lavf58.31.104
  Stream #0:0 : Audio : mp3 (libmp3lame), 44100 Hz, stereo, s16p, 192 kb/s
  Metadata :
  encoder : Lavc58.55.101 libmp3lame

  but on android it gets error

• Using Unicast RTSP URIs via ffmpeg

  6 août 2019, par Chris Marshall

  I’m fairly new to ffmpeg, so I’d certainly appreciate being given an "M" to "RTFM." The ffmpeg docs are...not-so-easy...to navigate, but I’m trying.

  The goal is to develop a compiled server that incorporates ffmpeg, but first, I need to get it working via CLI.

  I have a standard AXIS Surveillance camera (AXIS M5525-E), set up as an ONVIF device (but that isn’t really relevant to this issue).

  When I query it, I get the following URI as its video streaming URI :

  rtsp://192.168.4.12/onvif-media/media.amp?profile=profile_1_jpeg&streamtype=unicast

  The IP is local to a sandboxed network.

  I add the authentication parameters to it, like so :

  rtsp://<login>:<password>@192.168.4.12/onvif-media/media.amp?profile=profile_1_jpeg&amp;streamtype=unicast
  
  </password></login>

  (Yeah, I know that’s not secure, but this is just for testing and feasibility study. The whole damn sandbox is an insecure mess).

  Now, if I use VLC to open the URI, it works great (of course). Looking at it with a packet analyzer, I see the following negotiation between the device and my computer (at .2 - Clipped for brevity) :

  Id = 11
  
  Source = 192.168.4.12
  
  Destination = 192.168.4.2
  
  Captured Length = 82
  
  Packet Length = 82
  
  Protocol = TCP
  
  Date Received = 2019-08-06 12:18:37 +0000
  
  Time Delta = 1.342024087905884
  
  Information = 554 -> 53755 ([ECN, ACK, SYN], Seq=696764098, Ack=3139240483, Win=28960)
  
                      °
  
                      °
  
                      °
  
  Id = 48
  
  Source = 192.168.4.12
  
  Destination = 192.168.4.2
  
  Captured Length = 366
  
  Packet Length = 366
  
  Protocol = TCP
  
  Date Received = 2019-08-06 12:18:38 +0000
  
  Time Delta = 2.09382700920105
  
  Information = 554 -> 53755 ([ACK, PUSH], Seq=696765606, Ack=3139242268, Win=1073)

  Followed immediately by UDP stream packets.

  If, however, I feed the same URI to ffmpeg :

  ffmpeg -i rtsp://<login>:<password>@192.168.4.12/onvif-media/media.amp?profile=profile_1_jpeg&amp;streamtype=unicast -c:v libx264 -crf 21 -preset veryfast -g 30 -sc_threshold 0 -f hls -hls_time 4 /Volumes/Development/webroot/fftest/stream.m3u8
  
  </password></login>

  I get nothing. No negotiation at all between the device and my computer.

  After that, if I then remove the &streamtype=unicast argument, I get a negotiation, and a stream :

  Id = 10
  
  Source = 192.168.4.12
  
  Destination = 192.168.4.2
  
  Captured Length = 82
  
  Packet Length = 82
  
  Protocol = TCP
  
  Date Received = 2019-08-06 10:37:48 +0000
  
  Time Delta = 3.047425985336304
  
  Information = 554 -> 49606 ([ECN, ACK, SYN], Seq=457514925, Ack=2138974173, Win=28960)
  
                      °
  
                      °
  
                      °
  
  Id = 31
  
  Source = 192.168.4.12
  
  Destination = 192.168.4.2
  
  Captured Length = 345
  
  Packet Length = 345
  
  Protocol = TCP
  
  Date Received = 2019-08-06 10:37:49 +0000
  
  Time Delta = 3.840152025222778
  
  Information = 554 -> 49606 ([ACK, PUSH], Seq=457516393, Ack=2138975704, Win=1039)

  I will, of course, be continuing to work out why this is [not] happening, and will post any solutions that I find, but, like I said, I’m fairly new to this, so it’s entirely possible that I’m missing some basic stuff, and would appreciate any guidance.

  Thanks !