Sur d’autres sites (17047)

• ffmpeg live stream to Youtube command line

  30 juin 2020, par brainoverflowse

  Would anyone assist myself with creating the correct ffmpeg command line for an audio and video rtsp camera feed that is 1440 and scale it to 1080 with a max bitrate of 10000 ?

  


• Freezing frames and demux errors

  23 novembre 2015, par f.rodrigues

  I’m trying to join some video clips using ffmpeg via python script using subprocess.

  Here’s a section of the code :

  def join_videos(videos):
  
      # videos is a list of tuples with (file_name, start_point, duration)
  
      path = os.path.dirname(__file__)
  
  
  
      # create a new video file containg only the desired bit, it will be named output_N.mov
  
      for out_n, (file_name, start, duration) in enumerate(videos, 1):
  
          video_path = path + "/VIDEOS/" + file_name
  
          ## essentialy ffmpeg -i %PATH_TO_VIDEO -ss %STARTING_POINT -c copy -t %DURATION output_%NUMBER.mov
  
          command = ["ffmpeg", "-i",video_path,"-ss", str(start),"-c","copy","-t",str(duration),"output_%i.mov"%out_n]
  
          subprocess.Popen(command, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
  
  
  
      # get the list of files with this pattern
  
      files = glob.glob("output_*.mov")
  
      # add them to a text file
  
      with open("to_merge_tmp.txt", 'w') as f:
  
          for file_name in files:
  
              f.write("file '{path}/{file_name}'\n".format(**locals()))
  
      # use 'ffmpeg' to concatenate
  
      command = "ffmpeg -f concat -i to_merge_tmp.txt -c copy final.mov"
  
      subprocess.Popen(command.split(" "), stderr=subprocess.PIPE, stdout=subprocess.PIPE)

  I issue a new video to be made using a list of file names and desired start point and duration.

  ex :

  videos = [('video1.mov', 15.5, 10), # video1, starting at 15.5 seconds, duration of 10 seconds
  
            ('video2.mov', 10.7, 5), 
  
            ('video3.mov', 0, 20)]
  
  join_videos(videos)

  this will generate a final.mov file with the parts joined together (one after the other)

  The program runs fine. No errors or anything.

  But when I try to play it, I have some frames that stay for too long (freezing), the audio plays normaly.

  I made a second script to play it programmaticly using the python bindings for VLC

  Here’s it :

  import vlc
  
  
  
  instance = vlc.Instance()
  
  media = instance.media_new("final.mov")
  
  player = instance.media_player_new()
  
  player.set_media(media)
  
  player.play()
  
  
  
  while player.is_playing():
  
       pass
  
  
  
  instance.vlm_release()
  
  player.release()
  
  instance.release()

  With this I get a bunch of warning when playing the files.

  for instance, this happens and the video doesn’t play (demux error)

  [0x7f4e64009528] mp4 demux error: MP4 plugin discarded (no moov,foov,moof box)  
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f4e64025be0] moov atom not found
  
  [0x7f4e64009528] avformat demux error: Could not open /medi /.../final.mov: Unknown error 1052488119

  And this happens, the video plays but with the freezing frames.

  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Non-reference picture received and no reference available
  
  [h264 @ 0x7fe76c0e5280] decode_slice_header error
  
  [h264 @ 0x7fe76c0e5280] concealing 1080 DC, 1080 AC, 1080 MV errors
  
  Non-reference picture received and no reference available
  
  [h264 @ 0x7fe76c0e5820] decode_slice_header error
  
  [h264 @ 0x7fe76c0e5820] concealing 1080 DC, 1080 AC, 1080 MV errors
  
  [0x7fe740001248] main vout display error: Failed to resize display

  or this one, which stops the playback midway and crashes the program.

  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Fontconfig warning: FcPattern object size does not accept value "0"
  
  Non-reference picture received and no reference available
  
  [h264 @ 0x7f5c3c0c0000] decode_slice_header error
  
  [h264 @ 0x7f5c3c0c0000] concealing 1080 DC, 1080 AC, 1080 MV errors
  
  Non-reference picture received and no reference available
  
  [h264 @ 0x7f5c3c0c0440] decode_slice_header error
  
  [h264 @ 0x7f5c3c0c0440] concealing 1080 DC, 1080 AC, 1080 MV errors
  
  [h264 @ 0x7f5c3c0c0440] Reinit context to 1280x720, pix_fmt: 12
  
  Non-reference picture received and no reference available
  
  [h264 @ 0x7f5c3c0c09e0] decode_slice_header error
  
  Non-reference picture received and no reference available
  
  [h264 @ 0x7f5c3c0befa0] decode_slice_header error

  I don’t know whats going on, I’m pretty sure it’s how the ffmpeg joins the files.

  EDIT

  As I found here, the moov atom not found error happens when a video recorder crashes when creating the file. But I find it hard to understand why this happens and doesn’t show any error when creating those files.

• Android ffmpeg very slow to transcode

  23 mars 2016, par Nat

  In Android phones (different phone models) it takes ffmpeg 5x the length of the video to transcode. A 1-minute video takes near 5 minutes to transcode. I have tried the following to improve performance and nothing has helped,

  -b:v 16K to 1024K
  
  -s 180x120 to 1920x1080
  
  -preset ultrafast
  
  -profile:v baseline
  
  -r 24 to 100
  
  maxrate 64K to 512K
  
  rate 64K to 512K
  
  -threads 0 to 16

  Nothing seems to help. Of course, some of them bring the speed up to 3x from 5x.

  Please help as I have run out of options.

  My current code is,

  ffmpeg -y -i /storage/emulated/0/DCIM/Camera/VID_20150819_220414.mp4 -strict experimental -s 480x270 -vcodec libx264 -r 24 -c:a copy /storage/emulated/0/Android/data/<myapp>/cache/VID_-K-qMCldTSzZomKakNzq.mp4 
  
  </myapp>

  Console log -----

  configuration: --arch=arm --cpu=cortex-a8 --target-os=linux --enable-runtime-cpudetect --prefix=/data/data/info.guardianproject.ffmpeg/app_opt --enable-pic --disable-shared --enable-static --cross-prefix=/home/n8fr8/dev/android/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --sysroot=/home/n8fr8/dev/android/ndk/platforms/android-16/arch-arm --extra-cflags='-I../x264 -mfloat-abi=softfp -mfpu=neon -fPIE -pie' --extra-ldflags='-L../x264 -fPIE -pie' --enable-version3 --enable-gpl --disable-doc --enable-yasm --enable-decoders --enable-encoders --enable-muxers --enable-demuxers --enable-parsers --enable-protocols --enable-filters --enable-avresample --enable-libfreetype --disable-indevs --enable-indev=lavfi --disable-outdevs --enable-hwaccels --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-libx264 --enable-zlib
  
  libavutil      51. 54.100 / 51. 54.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libavcodec     54. 23.100 / 54. 23.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libavformat    54.  6.100 / 54.  6.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libavdevice    54.  0.100 / 54.  0.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libavfilter     2. 77.100 /  2. 77.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libswscale      2.  1.100 /  2.  1.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libswresample   0. 15.100 /  0. 15.100
  
  10-05 10:29:22.288: V/VideoEditor(7655): shellOut:   libpostproc    52.  0.100 / 52.  0.100
  
  10-05 10:29:22.740: V/VideoEditor(7655): shellOut: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/Camera/VID_20151002_152817.mp4':
  
  10-05 10:29:22.740: V/VideoEditor(7655): shellOut:   Metadata:
  
  10-05 10:29:22.741: V/VideoEditor(7655): shellOut:     major_brand     : mp42
  
  10-05 10:29:22.741: V/VideoEditor(7655): shellOut:     minor_version   : 0
  
  10-05 10:29:22.742: V/VideoEditor(7655): shellOut:     compatible_brands: isommp42
  
  10-05 10:29:22.742: V/VideoEditor(7655): shellOut:     creation_time   : 2015-10-02 22:29:32
  
  10-05 10:29:22.743: V/VideoEditor(7655): shellOut:   Duration: 00:01:14.13, start: 0.000000, bitrate: 17112 kb/s
  
  10-05 10:29:22.745: V/VideoEditor(7655): shellOut:     Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 16991 kb/s, SAR 65536:65536 DAR 16:9, 29.84 fps, 29.85 tbr, 90k tbn, 180k tbc
  
  10-05 10:29:22.745: V/VideoEditor(7655): shellOut:     Metadata:
  
  10-05 10:29:22.747: V/VideoEditor(7655): shellOut:       creation_time   : 2015-10-02 22:29:32
  
  10-05 10:29:22.748: V/VideoEditor(7655): shellOut:       handler_name    : VideoHandle
  
  10-05 10:29:22.749: V/VideoEditor(7655): shellOut:     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, s16, 96 kb/s
  
  10-05 10:29:22.749: V/VideoEditor(7655): shellOut:     Metadata:
  
  10-05 10:29:22.750: V/VideoEditor(7655): shellOut:       creation_time   : 2015-10-02 22:29:32
  
  10-05 10:29:22.751: V/VideoEditor(7655): shellOut:       handler_name    : SoundHandle
  
  10-05 10:29:22.760: V/VideoEditor(7655): shellOut: [buffer @ 0xb5caa0a0] w:1920 h:1080 pixfmt:yuv420p tb:1/90000 sar:65536/65536 sws_param:flags=2
  
  10-05 10:29:22.760: V/VideoEditor(7655): shellOut: [buffersink @ 0xb5caa0d0] No opaque field provided
  
  10-05 10:29:22.802: V/VideoEditor(7655): shellOut: [scale @ 0xb5caa100] w:1920 h:1080 fmt:yuv420p sar:65536/65536 -> w:720 h:404 fmt:yuv420p sar:404/405 flags:0x4
  
  10-05 10:29:22.803: V/VideoEditor(7655): shellOut: [libx264 @ 0xb5c28000] using SAR=1/1
  
  10-05 10:29:22.818: V/VideoEditor(7655): shellOut: [libx264 @ 0xb5c28000] using cpu capabilities: ARMv6 NEON
  
  10-05 10:29:22.904: V/VideoEditor(7655): shellOut: [libx264 @ 0xb5c28000] profile High, level 3.0
  
  shellOut: [libx264 @ 0xb5c28000] 264 - core 125 r680+1521 37be552 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  10-05 10:29:22.909: V/VideoEditor(7655): shellOut: Output #0, mp4, to '/storage/emulated/0/Android/data/com.myapp/cache/VID_-K-t2E4MtV_RTw4a1JXb.mp4':
  
  10-05 10:29:22.910: V/VideoEditor(7655): shellOut:   Metadata:
  
  10-05 10:29:22.911: V/VideoEditor(7655): shellOut:     major_brand     : mp42
  
  10-05 10:29:22.912: V/VideoEditor(7655): shellOut:     minor_version   : 0
  
  10-05 10:29:22.913: V/VideoEditor(7655): shellOut:     compatible_brands: isommp42
  
  10-05 10:29:22.913: V/VideoEditor(7655): shellOut:     creation_time   : 2015-10-02 22:29:32
  
  10-05 10:29:22.914: V/VideoEditor(7655): shellOut:     encoder         : Lavf54.6.100
  
  10-05 10:29:22.916: V/VideoEditor(7655): shellOut:     Stream #0:0(eng): Video: h264 (![0][0][0] / 0x0021), yuv420p, 720x404 [SAR 1:1 DAR 180:101], q=-1--1, 512 kb/s, 24 tbn, 24 tbc
  
  10-05 10:29:22.916: V/VideoEditor(7655): shellOut:     Metadata:
  
  10-05 10:29:22.917: V/VideoEditor(7655): shellOut:       creation_time   : 2015-10-02 22:29:32
  
  10-05 10:29:22.918: V/VideoEditor(7655): shellOut:       handler_name    : VideoHandle
  
  10-05 10:29:22.919: V/VideoEditor(7655): shellOut:     Stream #0:1(eng): Audio: aac (@[0][0][0] / 0x0040), 48000 Hz, mono, 96 kb/s
  
  10-05 10:29:22.920: V/VideoEditor(7655): shellOut:     Metadata:
  
  10-05 10:29:22.921: V/VideoEditor(7655): shellOut:       creation_time   : 2015-10-02 22:29:32
  
  10-05 10:29:22.922: V/VideoEditor(7655): shellOut:       handler_name    : SoundHandle
  
  10-05 10:29:22.922: V/VideoEditor(7655): shellOut: Stream mapping:
  
  10-05 10:29:22.923: V/VideoEditor(7655): shellOut:   Stream #0:0 -> #0:0 (h264 -> libx264)
  
  10-05 10:29:22.924: V/VideoEditor(7655): shellOut:   Stream #0:1 -> #0:1 (copy)
  
  10-05 10:29:22.924: V/VideoEditor(7655): shellOut: Press [q] to stop, [?] for help
  
  10-05 10:29:23.637: V/VideoEditor(7655): shellOut: frame=    6 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s    
  
  10-05 10:29:24.205: V/VideoEditor(7655): shellOut: frame=   12 fps= 10 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s    
  
  10-05 10:29:24.735: I/chromium(7655): [INFO:CONSOLE(25)] "No Content-Security-Policy meta tag found. Please add one when using the cordova-plugin-whitelist plugin.", source: file:///android_asset/www/plugins/cordova-plugin-whitelist/whitelist.js (25)
  
  10-05 10:29:24.756: V/VideoEditor(7655): shellOut: frame=   17 fps=9.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=0 drop=1    
  
  10-05 10:29:25.327: V/VideoEditor(7655): shellOut: frame=   22 fps=9.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=0 drop=2    
  
  10-05 10:29:25.904: V/VideoEditor(7655): shellOut: frame=   26 fps=9.1 q=0.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=0 drop=4    

  ---