[FFmpeg-user] Non-monotonic DTS issue with merging MP4 files with different tbn
DEF
shaker.doc at gmail.com
Sat May 11 11:07:09 EEST 2024
On Sat, 11 May 2024 at 07:28, Abhishek Gupta <abhishekgupt at gmail.com> wrote:
>
> Hello all,
>
> I am trying to merge two files below that have different AV properties:
> 1.mp4
> <https://speechacellc-my.sharepoint.com/:v:/g/personal/abhishek_speechacellc_onmicrosoft_com/EUsJDq2Q3LlBub7zlFHYHp0B2xhj4GpyCSjpWfp_m4uq_g?nav=eyJyZWZlcnJhbEluZm8iOnsicmVmZXJyYWxBcHAiOiJPbmVEcml2ZUZvckJ1c2luZXNzIiwicmVmZXJyYWxBcHBQbGF0Zm9ybSI6IldlYiIsInJlZmVycmFsTW9kZSI6InZpZXciLCJyZWZlcnJhbFZpZXciOiJNeUZpbGVzTGlua0NvcHkifX0&e=RL2XMX>
> 2.mp4
> <https://speechacellc-my.sharepoint.com/:v:/g/personal/abhishek_speechacellc_onmicrosoft_com/EdqHFw0X61JLjwdboqiD5GUBvxdVympQQ6WJMp786xv2lw?nav=eyJyZWZlcnJhbEluZm8iOnsicmVmZXJyYWxBcHAiOiJPbmVEcml2ZUZvckJ1c2luZXNzIiwicmVmZXJyYWxBcHBQbGF0Zm9ybSI6IldlYiIsInJlZmVycmFsTW9kZSI6InZpZXciLCJyZWZlcnJhbFZpZXciOiJNeUZpbGVzTGlua0NvcHkifX0&e=jTx1Sm>
>
> *Below is ffprobe output for 1.mp4:*
> ffprobe version 6.1.1-3ubuntu5 Copyright (c) 2007-2023 the FFmpeg developers
> built with gcc 13 (Ubuntu 13.2.0-23ubuntu3)
> configuration: --prefix=/usr --extra-version=3ubuntu5
> --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
> --disable-stripping --disable-omx --enable-gnutls --enable-libaom
> --enable-libass --enable-libbs2b --enable-libcaca --enable-libcdio
> --enable-libcodec2 --enable-libdav1d --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libglslang --enable-libgme --enable-libgsm --enable-libharfbuzz
> --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
> --enable-libopenmpt --enable-libopus --enable-librubberband
> --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex
> --enable-libtheora --enable-libtwolame --enable-libvidstab
> --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265
> --enable-libxml2 --enable-libxvid --enable-libzimg --enable-openal
> --enable-opencl --enable-opengl --disable-sndio --enable-libvpl
> --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883
> --enable-chromaprint --enable-frei0r --enable-ladspa --enable-libbluray
> --enable-libjack --enable-libpulse --enable-librabbitmq --enable-librist
> --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libx264
> --enable-libzmq --enable-libzvbi --enable-lv2 --enable-sdl2
> --enable-libplacebo --enable-librav1e --enable-pocketsphinx
> --enable-librsvg --enable-libjxl --enable-shared
> libavutil 58. 29.100 / 58. 29.100
> libavcodec 60. 31.102 / 60. 31.102
> libavformat 60. 16.100 / 60. 16.100
> libavdevice 60. 3.100 / 60. 3.100
> libavfilter 9. 12.100 / 9. 12.100
> libswscale 7. 5.100 / 7. 5.100
> libswresample 4. 12.100 / 4. 12.100
> libpostproc 57. 3.100 / 57. 3.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
> Metadata:
> major_brand : mp42
> minor_version : 0
> compatible_brands: mp42mp41
> creation_time : 2024-04-11T07:52:09.000000Z
> Duration: 00:00:10.40, start: 0.000000, bitrate: 1226 kb/s
> *Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661),
> yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 861 kb/s, 30
> fps, 30 tbr, 30k tbn (default)*
> Metadata:
> creation_time : 2024-04-11T07:52:09.000000Z
> handler_name : ?Mainconcept Video Media Handler
> vendor_id : [0][0][0][0]
> encoder : AVC Coding
> Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
> stereo, fltp, 316 kb/s (default)
> Metadata:
> creation_time : 2024-04-11T07:52:10.000000Z
> handler_name : #Mainconcept MP4 Sound Media Handler
> vendor_id : [0][0][0][0]
>
>
> *Below is ffprobe output for 2.mp4:*ffprobe version 6.1.1-3ubuntu5
> Copyright (c) 2007-2023 the FFmpeg developers
> built with gcc 13 (Ubuntu 13.2.0-23ubuntu3)
> configuration: --prefix=/usr --extra-version=3ubuntu5
> --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
> --disable-stripping --disable-omx --enable-gnutls --enable-libaom
> --enable-libass --enable-libbs2b --enable-libcaca --enable-libcdio
> --enable-libcodec2 --enable-libdav1d --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libglslang --enable-libgme --enable-libgsm --enable-libharfbuzz
> --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
> --enable-libopenmpt --enable-libopus --enable-librubberband
> --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex
> --enable-libtheora --enable-libtwolame --enable-libvidstab
> --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265
> --enable-libxml2 --enable-libxvid --enable-libzimg --enable-openal
> --enable-opencl --enable-opengl --disable-sndio --enable-libvpl
> --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883
> --enable-chromaprint --enable-frei0r --enable-ladspa --enable-libbluray
> --enable-libjack --enable-libpulse --enable-librabbitmq --enable-librist
> --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libx264
> --enable-libzmq --enable-libzvbi --enable-lv2 --enable-sdl2
> --enable-libplacebo --enable-librav1e --enable-pocketsphinx
> --enable-librsvg --enable-libjxl --enable-shared
> libavutil 58. 29.100 / 58. 29.100
> libavcodec 60. 31.102 / 60. 31.102
> libavformat 60. 16.100 / 60. 16.100
> libavdevice 60. 3.100 / 60. 3.100
> libavfilter 9. 12.100 / 9. 12.100
> libswscale 7. 5.100 / 7. 5.100
> libswresample 4. 12.100 / 4. 12.100
> libpostproc 57. 3.100 / 57. 3.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf59.16.100
> Duration: 00:00:10.89, start: 0.000000, bitrate: 87 kb/s
> *Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661),
> yuv420p(progressive), 564x396, 16 kb/s, 24 fps, 24 tbr, 30k tbn (default)*
> Metadata:
> handler_name : VideoHandler
> vendor_id : [0][0][0][0]
> Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
> stereo, fltp, 64 kb/s (default)
> Metadata:
> handler_name : SoundHandler
> vendor_id : [0][0][0][0]
>
> As you can see they have different fps and tbn and tbr. As a next step, I
> tried to make file 2.mp4 have the same properties as file 1.mp4 using the
> below commands:
> Change framerate: *ffmpeg -y -i 2.mp4 -vf "setpts=1.25*PTS" -r 30 2.1.mp4*
> Change tbn: *ffmpeg -i 2.1.mp4 -c:v copy -video_track_timescale 30k 2.2.mp4*
>
>
> *Here is the ffprobe result for 2.2.mp4:*ffprobe version 6.1.1-3ubuntu5
> Copyright (c) 2007-2023 the FFmpeg developers
> built with gcc 13 (Ubuntu 13.2.0-23ubuntu3)
> configuration: --prefix=/usr --extra-version=3ubuntu5
> --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
> --disable-stripping --disable-omx --enable-gnutls --enable-libaom
> --enable-libass --enable-libbs2b --enable-libcaca --enable-libcdio
> --enable-libcodec2 --enable-libdav1d --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libglslang --enable-libgme --enable-libgsm --enable-libharfbuzz
> --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
> --enable-libopenmpt --enable-libopus --enable-librubberband
> --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex
> --enable-libtheora --enable-libtwolame --enable-libvidstab
> --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265
> --enable-libxml2 --enable-libxvid --enable-libzimg --enable-openal
> --enable-opencl --enable-opengl --disable-sndio --enable-libvpl
> --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883
> --enable-chromaprint --enable-frei0r --enable-ladspa --enable-libbluray
> --enable-libjack --enable-libpulse --enable-librabbitmq --enable-librist
> --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libx264
> --enable-libzmq --enable-libzvbi --enable-lv2 --enable-sdl2
> --enable-libplacebo --enable-librav1e --enable-pocketsphinx
> --enable-librsvg --enable-libjxl --enable-shared
> libavutil 58. 29.100 / 58. 29.100
> libavcodec 60. 31.102 / 60. 31.102
> libavformat 60. 16.100 / 60. 16.100
> libavdevice 60. 3.100 / 60. 3.100
> libavfilter 9. 12.100 / 9. 12.100
> libswscale 7. 5.100 / 7. 5.100
> libswresample 4. 12.100 / 4. 12.100
> libpostproc 57. 3.100 / 57. 3.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.2.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf60.16.100
> Duration: 00:00:13.53, start: 0.000000, bitrate: 77 kb/s
> *Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661),
> yuv420p(progressive), 564x396, 17 kb/s, 30 fps, 30 tbr, 30k tbn (default)*
> Metadata:
> handler_name : VideoHandler
> vendor_id : [0][0][0][0]
> encoder : Lavc60.31.102 libx264
> Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
> stereo, fltp, 64 kb/s (default)
> Metadata:
> handler_name : SoundHandler
> vendor_id : [0][0][0][0]
>
> As can be observed now the value for 1.mp4 and 2.mp4 match:
Actually, they still not match for the concat demuxer
> 1.mp4 - Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661),
> yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 861 kb/s, 30
^^^^^^^^^^^
> fps, 30 tbr, 30k tbn (default)
> 2.mp4 - Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661),
> yuv420p(progressive), 564x396, 17 kb/s, 30 fps, 30 tbr, 30k tbn (default)
^^^^^^^^^
>
> Now if I try to merge the 2 files as follows, I get the notorious
> non-monotonic DTS error as below:
> *merge.txt*
> file 1.mp4
> file 2.2.mp4
>
> ffmpeg -f concat -i merge.txt -vcodec copy -acodec copy combined.mp4
This command would not work easily
1.mp4 is 1920x1080 and 2.mp4 is 564x396.
You had better use the concat filter and you should make an
intermediate steps, giving both file the same resolution of 564x396
for obvious reasons....
Greeetings
DEF
> ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg developers
> built with gcc 13 (Ubuntu 13.2.0-23ubuntu3)
> configuration: --prefix=/usr --extra-version=3ubuntu5
> --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
> --disable-stripping --disable-omx --enable-gnutls --enable-libaom
> --enable-libass --enable-libbs2b --enable-libcaca --enable-libcdio
> --enable-libcodec2 --enable-libdav1d --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libglslang --enable-libgme --enable-libgsm --enable-libharfbuzz
> --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
> --enable-libopenmpt --enable-libopus --enable-librubberband
> --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex
> --enable-libtheora --enable-libtwolame --enable-libvidstab
> --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265
> --enable-libxml2 --enable-libxvid --enable-libzimg --enable-openal
> --enable-opencl --enable-opengl --disable-sndio --enable-libvpl
> --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883
> --enable-chromaprint --enable-frei0r --enable-ladspa --enable-libbluray
> --enable-libjack --enable-libpulse --enable-librabbitmq --enable-librist
> --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libx264
> --enable-libzmq --enable-libzvbi --enable-lv2 --enable-sdl2
> --enable-libplacebo --enable-librav1e --enable-pocketsphinx
> --enable-librsvg --enable-libjxl --enable-shared
> libavutil 58. 29.100 / 58. 29.100
> libavcodec 60. 31.102 / 60. 31.102
> libavformat 60. 16.100 / 60. 16.100
> libavdevice 60. 3.100 / 60. 3.100
> libavfilter 9. 12.100 / 9. 12.100
> libswscale 7. 5.100 / 7. 5.100
> libswresample 4. 12.100 / 4. 12.100
> libpostproc 57. 3.100 / 57. 3.100
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x57a3a3fbb500] Auto-inserting h264_mp4toannexb
> bitstream filter
> Input #0, concat, from 'merge.txt':
> Duration: N/A, start: 0.000000, bitrate: 1178 kb/s
> Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv,
> bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 861 kb/s, 30 fps, 30
> tbr, 30k tbn
> Metadata:
> creation_time : 2024-04-11T07:52:09.000000Z
> handler_name : ?Mainconcept Video Media Handler
> vendor_id : [0][0][0][0]
> encoder : AVC Coding
> Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
> fltp, 316 kb/s
> Metadata:
> creation_time : 2024-04-11T07:52:10.000000Z
> handler_name : #Mainconcept MP4 Sound Media Handler
> vendor_id : [0][0][0][0]
> Output #0, mp4, to 'combined.mp4':
> Metadata:
> encoder : Lavf60.16.100
> Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv,
> bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 861 kb/s, 30
> fps, 30 tbr, 30k tbn
> Metadata:
> creation_time : 2024-04-11T07:52:09.000000Z
> handler_name : ?Mainconcept Video Media Handler
> vendor_id : [0][0][0][0]
> encoder : AVC Coding
> Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
> fltp, 316 kb/s
> Metadata:
> creation_time : 2024-04-11T07:52:10.000000Z
> handler_name : #Mainconcept MP4 Sound Media Handler
> vendor_id : [0][0][0][0]
> Stream mapping:
> Stream #0:0 -> #0:0 (copy)
> Stream #0:1 -> #0:1 (copy)
> Press [q] to stop, [?] for help
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x57a3a3fbb500] Auto-inserting h264_mp4toannexb
> bitstream filter
>
> *[mp4 @ 0x57a3a4046b40] Non-monotonic DTS in output stream 0:0; previous:
> 310000, current: 310000; changing to 310001. This may result in incorrect
> timestamps in the output file.[mp4 @ 0x57a3a4046b40] Non-monotonic DTS in
> output stream 0:1; previous: 498688, current: 498176; changing to 498689.
> This may result in incorrect timestamps in the output file.*
> [out#0/mp4 @ 0x57a3a4016c00] video:1123kB audio:489kB subtitle:0kB other
> streams:0kB global headers:0kB muxing overhead: 1.575911%
> size= 1637kB time=00:00:23.83 bitrate= 562.6kbits/s speed= 516x
>
> I have spent all day trying to solve this one. Please can someone help? I
> will be deeply obliged.
>
> Thanks and please let me know if you have further questions or need more
> information.
>
> Abhishek
>
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