Recherche avancée

Sur d’autres sites (9548)

• FFMpeg Input link in1:v0 parameters (size > 640x352, SAR 0:1) do not match the corresponding output link in0:v0 > parameters [duplicate]

  25 avril 2020, par Android Developer

  I am using below command to concatenate videos-

  



  String command[] = {"-i",inputFile1AbsolutePath,"-i",inputFile2AbsolutePath .....,"-i",inputFileNAbsolutePath,"-filter_complex","[0:v0] [0:a0] [1:v1] [1:a1]...[N:vN] concat=n=N:v=1:a=1 [v] [a],"-map","[v]","-map","[a]", outputFileAbsolutePath};


  



  and got below error-

  



  


  FAILED with output : 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/Download/g3cm1tt7qtd41.mp4' :
 Metadata :
 major_brand : iso6
 minor_version : 1
 compatible_brands : mp42iso6avc1isom
 creation_time : 2020-01-30 11:13:07
 Duration : 00:00:00.00, start : 0.042667, bitrate : N/A
 Stream #0:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p,
 854x480 [SAR 2136:2135 DAR 89:50], 1225 kb/s, 30 fps, 30 tbr, 15360
 tbn, 60 tbc (default)
 Stream #0:1(eng) : Audio : aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 128 kb/s (default)
 Input #1, mov,mp4,m4a,3gp,3g2,mj2, from
 '/storage/emulated/0/WhatsApp/Media/WhatsApp
 Video/VID-20200404-WA0000.mp4' :
 Metadata :
 major_brand : mp42
 minor_version : 0
 compatible_brands : mp42isom
 Duration : 00:03:43.14, start : 0.000000, bitrate : 774 kb/s
 Stream #1:0(und) : Video : h264 (Baseline) (avc1 / 0x31637661), yuv420p,
 640x352, 675 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 1200 tbc (default)
 Stream #1:1(und) : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono,
 fltp, 96 kb/s (default)
 [Parsed_concat_0 @ 0xb4529400] Input link in1:v0 parameters (size
 640x352, SAR 0:1) do not match the corresponding output link in0:v0
 parameters (854x480, SAR 2136:2135)
 [Parsed_concat_0 @ 0xb4529400] Failed to configure output pad on
 Parsed_concat_0
 Error configuring complex filters.
 Invalid argument

  


  



  Seeing this answer i tried using-

  



  [0:v]setsar=1[v0]; [0:a0] [1:v]setsar=1[v1]; [1:a1]


  



  but did not worked !

  



  How can i resolve this ?

  


• ffmpeg output file smaller than input file

  3 mai 2020, par Debug255

  I am using ffmpeg to rotate videos 90 or 180 degrees in a Python script. It works great. But, I am curious as to why the output file would be a smaller amount of bytes than the input file.

  



  Here are the commands I use :

  



  180 degrees :

  



  ffmpeg -i ./input.mp4 -preset veryslow -vf "transpose=2,transpose=2,format=yuv420p" -metadata:s:v rotate=0 -codec:v libx264 -codec:a copy ./output.mp4

  



  90 degrees :

  



  ffmpeg -i ./input.mp4 -vf "transpose=2" ./output.mp4

  



  For example, a GoPro Hero 3 MP4 file was originally 2.0 GB. The resulting output file was 480.9 MB. Another GoPro file was 2.0 and its resulting file was 671.5 MB. Is this maybe because the GoPro files were 2.0 but contains empty space, sort of like how some NTFS filesystems make a minimal 4k file, even when there is less bytes in it ?

  



  If this isn't the GoPro Hero 3, how do I rotate the files 90 or 180 degrees but ensure the output file size is the same ? Or, is data loss expected ? Does the data loss have to do with the format ?

  



  Note that the quality of the video doesn't appear to be damaged, which is good. So, I am interested in learning more about why this is happening, then I can read the section of ffmpeg documentation that is relevant to this.

  



  Thank you !

  


• What makes the bitrate of dash stream output low as compared to bitrate of input mp4 video

  7 janvier 2021, par Chinmaey Shende

  I used ffmpeg to convert bbb.mp4 to dash stream. I used the ffprobe to get the bitrates of input and output (shown below)
For the same resolution video 1920x1080 input has bit rate 2998 kb/s where as output has bitate of 20 kb/s.
My profile is set to "-b:v:0 200K -s:v:0 640x360 -b:v:1 600K -s:v:1 852x480 -b:v:2 4000K -s:v:2 1920x1080".
I am trying to understand what determines the output bit rate for the dash stream ?
Why does my output different from the input profile set in ffmpeg command

  



  Input video stream - bbb.mp4

  



  '''  Duration: 00:10:34.53, start: 0.000000, bitrate: 3481 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2998 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)'''


  



  Output :

  



  '''  Duration: 00:10:34.60, start: 630.000000, bitrate: 20 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 20 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    major_brand     : iso5
    minor_version   : 512
    compatible_brands: iso5iso6mp41
    encoder         : Lavf58.42.100
  Duration: 00:10:34.60, start: 630.000000, bitrate: 4 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 852x480 [SAR 640:639 DAR 16:9], 4 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    major_brand     : iso5
    minor_version   : 512
    compatible_brands: iso5iso6mp41
    encoder         : Lavf58.42.100
  Duration: 00:10:34.60, start: 630.000000, bitrate: 1 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 640x360 [SAR 1:1 DAR 16:9], 1 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
'''


  



  I tried to look in ffprobe documentation I could not find the definition of the bit_rate field output in ffprobe.

  



  Can you please help me to understand this ?