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• aac : correctly map 7.1ch-wide AAC from FDK AAC encoder

  4 juin 2015, par nu774

  aac : correctly map 7.1ch-wide AAC from FDK AAC encoder
  FDK AAC encoder outputs SCE(front)+CPE(front)+CPE(back)+CPE(back) on
  
  MODE_7_1_REAR_SURROUND configuration.
  
  Since decoder couldn’t properly map 4 back channels, decoding failed
  
  unless -request_channel_layout 0x8000000000000000 has been specified.
  
  Now we treat first CPE(back) as CPE(side) on channel mapping.
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DH] libavcodec/aacdec.c

• ffmpeg change metadata inside video file

  26 novembre 2020, par virtualsets

  Hello I have problems to change timecode insdie metadata of a video file "mov"

  


  ruta=r"E:\Brutos-sin-eliminar\inma-ruben-22-2-2020\multicam\\"
nombre=r"A019_02230134_C186.mov"
comand="ffmpeg -i " + nombre + " -ss 0 -map 0 -acodec copy -vcodec copy -timecode 01:20:10:00 -metadata:s:2:0 timecode=01:20:10:00 -metadata:s:1:0 timecode=01:20:10:00 -metadata:s:0:2 -metadata:s:0:2  timecode=01:10:10:00"+ " convert_" + nombre

os.popen(comand)


  


  I need to put muy own timecode to the file but this command not works.

  


  The console give me

  


    mov @ 00000225287fdc00] You requested a copy of the original timecode track so timecode metadata are now ignored
Output #0, mov, to 'convert_A019_02230134_C186.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    com.blackmagic-design.camera.windowedSensor: 1
    com.apple.proapps.manufacturer: Blackmagic Design
    com.blackmagic-design.camera.uuid: 3cf1dd9e-e307-47ff-864e-5487fea3fa47
    com.blackmagic-design.camera.projectFPS: 25
    com.apple.proapps.shootingRate: 50
    com.blackmagic-design.camera.cameraType: Blackmagic Pocket Cinema Camera 4K
    com.blackmagic-design.camera.shutterAngle: 180°
    com.blackmagic-design.camera.shutterMode: Angle
    com.blackmagic-design.camera.iso: 3200
    com.blackmagic-design.camera.whiteBalanceKelvin: 3000
    com.blackmagic-design.camera.whiteBalanceTint: -44
    com.apple.proapps.customgamma: com.blackmagic-design.camera.filmlog
    com.blackmagic-design.camera.look.LUTName: Blackmagic Pocket 4K Film to Extended Video.cube
    com.blackmagic-design.camera.guides.aspectRatio: 2:1
    com.blackmagic-design.camera.guides.safeArea: 90
    com.blackmagic-design.camera.firmware: 6.6
    com.apple.proapps.clipID: A019_02230134_C186
    com.apple.proapps.reel: 19
    com.apple.proapps.scene: 1
    com.apple.proapps.shot: 99
    com.apple.proapps.isGood: 0
    com.blackmagic-design.camera.environment: interior
    com.blackmagic-design.camera.dayNight: day
    com.apple.proapps.cameraName: A
    com.blackmagic-design.camera.colorScience: Blackmagic Pocket Cinema Camera 4K, Color Science Gen 4
    com.blackmagic-design.camera.dateRecorded: 2020:02:23
    timecode        : 01:20:10:00
    encoder         : Lavf58.11.101
    Stream #0:0(eng): Video: prores (apcn / 0x6E637061), yuv422p10le(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 122315 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 01:10:10:00
      handler_name    : ?Apple Alias Data Handler
      encoder         : Apple ProRes 422
      timecode        : 01:10:10:00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s (default)
    Metadata:
      creation_time   : 2020-02-23T00:34:02.000000Z
      handler_name    : ?Apple Alias Data Handler
      timecode        : 01:20:10:00
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2020-02-23T00:34:02.000000Z
      handler_name    : ?Apple Alias Data Handler
      timecode        : 01:20:10:00
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=  467 fps=0.0 q=-1.0 Lsize=  281452kB time=00:00:18.64 bitrate=123693.3kbits/s speed=71.1x    
video:278913kB audio:2531kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002533%


  


  I dont understand why not modificate the mov file... when open the metadata it is oringinal.

  


  Reggards

  


• Playback drops frames or stutter on good hardware [closed]

  30 décembre 2023, par Lemonek

  I'm planning to use TDARR and tring to prevent any issues before with (re)encoding. And I have stumbled on issue with one TV Show - recently I have downloaded refreshed old show but playback stutters on TV or drops frames (few frames every few secs - so video plays nicely but suddenly few frames are dropeed and then for next few secs it playsnicely - no issues with sound)

  


  I guess this particular video has some options which causes issues or I dont know but here are some facts I have gathered (ffprobe -v quiet -print_format json -show_format -show_streams) :

  


  

  1. The TV is capable of playing FullHD HECV 10bit smoothly https://pastebin.com/0efSGjk9

  


  2. Original video stutters https://pastebin.com/vvLn8y4a

  


  3. Converted video (QSV) stutters (linux/ffmpeg https://pastebin.com/XbazLEft
Below cutout part of script parameters for converting - $FPS is supplied as without it ffmpeg does not create I Frames but that is not a problem here)

  


  


          -hide_banner -y -init_hw_device qsv:hw \
        -hwaccel qsv -hwaccel_output_format qsv \
        -i "$FILENAME_BACK" \
        -map 0:v:0 -map 0:a:0 \
        -c:v hevc_qsv -preset slow -global_quality 22 -g $FPS\
        -c:a copy \
        -movflags faststart "$FILENAME_OUTPUT"


  


  

  4. Converted video (NVENC) plays nicely (win/handbrake) https://pastebin.com/HbBNMZvT

  


  


  In the end I wish I could create "safe" parameters list which I will supply to TDARR and not to worry about issues while converting videos.

  


  Forgot to mention - Hardware on which Im planning to mass encode has Intel proc with QSV capabilities - I'm not planning to encode on NV.

  


  If needed - I can provide any other information.