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Why is the filesize different when swapping audio tracks using ffmeg ?
20 août 2021, par BrianI have a movie that I have encoded using Handbrake on a Mac a long time ago. When I encoded the movie, I put the stereo audio as track 1 and the 5.1 audio as track 2. The starting filesize is 853,320,914 bytes. Below is the data from ffprobe.


ffprobe version 4.2.1-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2007-2019 the FFmpeg developers
 built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
 configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Annabelle - Comes Home (2019).m4v':
 Metadata:
 major_brand : mp42
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 creation_time : 2020-04-06T22:40:36.000000Z
 encoder : HandBrake 1.1.2 2018090500
 Duration: 01:46:04.86, start: 0.000000, bitrate: 1072 kb/s
 Chapter #0:0: start 0.000000, end 476.986000
 Metadata:
 title : Chapter 1
 Chapter #0:1: start 476.986000, end 933.608000
 Metadata:
 title : Chapter 2
 Chapter #0:2: start 933.608000, end 1441.449000
 Metadata:
 title : Chapter 3
 Chapter #0:3: start 1441.449000, end 1976.358000
 Metadata:
 title : Chapter 4
 Chapter #0:4: start 1976.358000, end 2579.753000
 Metadata:
 title : Chapter 5
 Chapter #0:5: start 2579.753000, end 3149.030000
 Metadata:
 title : Chapter 6
 Chapter #0:6: start 3149.030000, end 3726.941000
 Metadata:
 title : Chapter 7
 Chapter #0:7: start 3726.941000, end 3973.520000
 Metadata:
 title : Chapter 8
 Chapter #0:8: start 3973.520000, end 4504.676000
 Metadata:
 title : Chapter 9
 Chapter #0:9: start 4504.676000, end 4904.409000
 Metadata:
 title : Chapter 10
 Chapter #0:10: start 4904.409000, end 5421.592000
 Metadata:
 title : Chapter 11
 Chapter #0:11: start 5421.592000, end 5998.001000
 Metadata:
 title : Chapter 12
 Chapter #0:12: start 5998.001000, end 6364.075000
 Metadata:
 title : Chapter 13
 Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : VideoHandler
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : Stereo
 Stream #0:2(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : Surround
 Side data:
 audio service type: main
 Stream #0:3(eng): Data: bin_data (text / 0x74786574)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : SubtitleHandler
Unsupported codec with id 100359 for input stream 3



My goal is to swap the stereo audio track with the 5.1 audio track and make the 5.1 audio track the default without having to reencode. To do this, I used the following command :


ffmpeg -i "Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019)_old.m4v" -map 0:v:0 -map 0:a:1 -map 0:a:0 -disposition:a:0 default -disposition:a:1 none -c copy "Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019).m4v"


Everything works as it should, I think anyways as I didn't get any errors...


ffmpeg version 4.2.1-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers
 built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
 configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019)_old.m4v':
 Metadata:
 major_brand : mp42
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 creation_time : 2020-04-06T22:40:36.000000Z
 encoder : HandBrake 1.1.2 2018090500
 Duration: 01:46:04.86, start: 0.000000, bitrate: 1072 kb/s
 Chapter #0:0: start 0.000000, end 476.986000
 Metadata:
 title : Chapter 1
 Chapter #0:1: start 476.986000, end 933.608000
 Metadata:
 title : Chapter 2
 Chapter #0:2: start 933.608000, end 1441.449000
 Metadata:
 title : Chapter 3
 Chapter #0:3: start 1441.449000, end 1976.358000
 Metadata:
 title : Chapter 4
 Chapter #0:4: start 1976.358000, end 2579.753000
 Metadata:
 title : Chapter 5
 Chapter #0:5: start 2579.753000, end 3149.030000
 Metadata:
 title : Chapter 6
 Chapter #0:6: start 3149.030000, end 3726.941000
 Metadata:
 title : Chapter 7
 Chapter #0:7: start 3726.941000, end 3973.520000
 Metadata:
 title : Chapter 8
 Chapter #0:8: start 3973.520000, end 4504.676000
 Metadata:
 title : Chapter 9
 Chapter #0:9: start 4504.676000, end 4904.409000
 Metadata:
 title : Chapter 10
 Chapter #0:10: start 4904.409000, end 5421.592000
 Metadata:
 title : Chapter 11
 Chapter #0:11: start 5421.592000, end 5998.001000
 Metadata:
 title : Chapter 12
 Chapter #0:12: start 5998.001000, end 6364.075000
 Metadata:
 title : Chapter 13
 Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : VideoHandler
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : Stereo
 Stream #0:2(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : Surround
 Side data:
 audio service type: main
 Stream #0:3(eng): Data: bin_data (text / 0x74786574)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : SubtitleHandler
[ipod @ 0x7faff0014000] track 1: codec frame size is not set
Output #0, ipod, to 'Annabelle - Comes Home (2019)/Annabelle - Comes Home (2019).m4v':
 Metadata:
 major_brand : mp42
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf58.29.100
 Chapter #0:0: start 0.000000, end 476.986000
 Metadata:
 title : Chapter 1
 Chapter #0:1: start 476.986000, end 933.608000
 Metadata:
 title : Chapter 2
 Chapter #0:2: start 933.608000, end 1441.449000
 Metadata:
 title : Chapter 3
 Chapter #0:3: start 1441.449000, end 1976.358000
 Metadata:
 title : Chapter 4
 Chapter #0:4: start 1976.358000, end 2579.753000
 Metadata:
 title : Chapter 5
 Chapter #0:5: start 2579.753000, end 3149.030000
 Metadata:
 title : Chapter 6
 Chapter #0:6: start 3149.030000, end 3726.941000
 Metadata:
 title : Chapter 7
 Chapter #0:7: start 3726.941000, end 3973.520000
 Metadata:
 title : Chapter 8
 Chapter #0:8: start 3973.520000, end 4504.676000
 Metadata:
 title : Chapter 9
 Chapter #0:9: start 4504.676000, end 4904.409000
 Metadata:
 title : Chapter 10
 Chapter #0:10: start 4904.409000, end 5421.592000
 Metadata:
 title : Chapter 11
 Chapter #0:11: start 5421.592000, end 5998.001000
 Metadata:
 title : Chapter 12
 Chapter #0:12: start 5998.001000, end 6364.075000
 Metadata:
 title : Chapter 13
 Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], q=2-31, 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 90k tbc (default)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : VideoHandler
 Stream #0:1(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : Surround
 Side data:
 audio service type: main
 Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s
 Metadata:
 creation_time : 2020-04-06T22:40:36.000000Z
 handler_name : Stereo
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
 Stream #0:2 -> #0:1 (copy)
 Stream #0:1 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame=152602 fps=12872 q=-1.0 Lsize= 834270kB time=01:46:04.79 bitrate=1073.8kbits/s speed= 537x 
video:403702kB audio:424714kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.706676%



Here is the resulting ffprobe of the new file showing it swapped the audio tracks :


ffprobe version 4.2.1-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2007-2019 the FFmpeg developers
 built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
 configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Annabelle - Comes Home (2019).m4v':
 Metadata:
 major_brand : M4V 
 minor_version : 512
 compatible_brands: isomiso2avc1
 encoder : Lavf58.29.100
 Duration: 01:46:04.86, start: 0.000000, bitrate: 1073 kb/s
 Chapter #0:0: start 0.000000, end 476.986000
 Metadata:
 title : Chapter 1
 Chapter #0:1: start 476.986000, end 933.608000
 Metadata:
 title : Chapter 2
 Chapter #0:2: start 933.608000, end 1441.449000
 Metadata:
 title : Chapter 3
 Chapter #0:3: start 1441.449000, end 1976.358000
 Metadata:
 title : Chapter 4
 Chapter #0:4: start 1976.358000, end 2579.753000
 Metadata:
 title : Chapter 5
 Chapter #0:5: start 2579.753000, end 3149.030000
 Metadata:
 title : Chapter 6
 Chapter #0:6: start 3149.030000, end 3726.941000
 Metadata:
 title : Chapter 7
 Chapter #0:7: start 3726.941000, end 3973.520000
 Metadata:
 title : Chapter 8
 Chapter #0:8: start 3973.520000, end 4504.676000
 Metadata:
 title : Chapter 9
 Chapter #0:9: start 4504.676000, end 4904.409000
 Metadata:
 title : Chapter 10
 Chapter #0:10: start 4904.409000, end 5421.592000
 Metadata:
 title : Chapter 11
 Chapter #0:11: start 5421.592000, end 5998.001000
 Metadata:
 title : Chapter 12
 Chapter #0:12: start 5998.001000, end 6364.075000
 Metadata:
 title : Chapter 13
 Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x360 [SAR 32:27 DAR 64:27], 519 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
 Metadata:
 handler_name : VideoHandler
 Stream #0:1(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
 Metadata:
 handler_name : Surround
 Side data:
 audio service type: main
 Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s
 Metadata:
 handler_name : Stereo
 Stream #0:3(eng): Data: bin_data (text / 0x74786574)
 Metadata:
 handler_name : SubtitleHandler
Unsupported codec with id 100359 for input stream 3



What I don't understand is why is the file size different ? The resulting file is larger at 854,292,790 bytes. Shouldn't the file sizes be the same since I literally just swapped tracks 0 and 1 ?


-
FFMPEG video merging. Only first video shows
13 mars 2019, par James AshworthI’m trying to put 7 second intro video before another one, but I keep having trouble with it. I don’t need to do anything else then add intros to videos.
This is what I’m currently getting.
(for %i in (*.mp4) do @echo file '%i') > mylist.txt
ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4
C:\Users\Business>cd desktop
C:\Users\Business\Desktop>cd testfile
C:\Users\Business\Desktop\Testfile>(for %i in (*.mp4) do @echo file '%i') > mylist.txt
C:\Users\Business\Desktop\Testfile>
C:\Users\Business\Desktop\Testfile>(for %i in (*.mp4) do @echo file '%i') > mylist.txt
C:\Users\Business\Desktop\Testfile>ffmpeg -f concat -i mylist.txt -c copy output.mp4
ffmpeg version N-93308-g1144d5c96d Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20190212
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. 26.100 / 56. 26.100
libavcodec 58. 47.103 / 58. 47.103
libavformat 58. 26.101 / 58. 26.101
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 48.100 / 7. 48.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000261c7072c00] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from 'mylist.txt':
Duration: N/A, start: -0.042667, bitrate: 2453 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 2325 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
Metadata:
handler_name : SoundHandler
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf58.26.101
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, q=2-31, 2325 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=110209 fps=3246 q=-1.0 Lsize= 1103461kB time=01:01:17.41 bitrate=2458.1kbits/s speed= 108x
video:1042171kB audio:57353kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.358030%
C:\Users\Business\Desktop\Testfile>It shows the 7 second video as the whole video. Someway i got it to change after 7 seconds, but then the rest of the video was really buddy.