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Android-FFmpeg adding subtitle to mp4 video does not work
7 septembre 2022, par ebdaa appI am trying to add srt file to a mp4 video using android mobile-ffmpeg , the code works with no error but the generated video does not contain the subtitle


here is the code :


String cmd = "-i " + videoPath + " -vf subtitles=\"" + subtitlePath + ":force_style='Alignment=10,Fontsize=18'\" " + OutputVideoPath;
 FFmpeg.executeAsync(cmd, new ExecuteCallback() {
 @Override
 public void apply(final long executionId, final int returnCode) {
 if (returnCode == RETURN_CODE_SUCCESS) {
 } else {
 
 }
 }
 });


here are the logs


I/mobile-ffmpeg: ffmpeg version v4.4-dev-416
 Copyright (c) 2000-2020 the FFmpeg developers
I/mobile-ffmpeg: built with Android (6454773 based on r365631c2) clang version 9.0.8 (https://android.googlesource.com/toolchain/llvm-project 98c855489587874b2a325e7a516b99d838599c6f) (based on LLVM 9.0.8svn)
 configuration: --cross-prefix=arm-linux-androideabi- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm/neon/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=armv7-a --cpu=armv7-a --cc=armv7a-linux-androideabi24-clang --cxx=armv7a-linux-androideabi24-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm/neon/cpu-features/lib -lndk_compat' --target-os=android --enable-neon --enable-asm --enable-inline-asm --build-suffix=_neon --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-openssl --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-static --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec
I/mobile-ffmpeg: libavutil 56. 55.100 / 56. 55.100
 libavcodec 58. 96.100 / 58. 96.100
I/mobile-ffmpeg: libavformat 58. 48.100 / 58. 48.100
 libavdevice 58. 11.101 / 58. 11.101
 libavfilter 7. 87.100 / 7. 87.100
 libswscale 5. 8.100 / 5. 8.100
I/mobile-ffmpeg: libswresample 3. 8.100 / 3. 8.100
I/mobile-ffmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001.mp4':
 Metadata:
 major_brand : 
I/mobile-ffmpeg: isom
 minor_version : 
I/mobile-ffmpeg: 512
 compatible_brands: 
I/mobile-ffmpeg: isomiso2mp41
I/mobile-ffmpeg: encoder : 
 Lavf58.48.100
I/mobile-ffmpeg: Duration: 
 00:00:29.60
 , start: 
I/mobile-ffmpeg: 0.000000
 , bitrate: 
 466 kb/s
I/mobile-ffmpeg: Stream #0:0
 (und)
I/mobile-ffmpeg: : Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:2 DAR 2:3], 336 kb/s
 , 
 5 fps, 
I/mobile-ffmpeg: 5 tbr, 
 10240 tbn, 
 5 tbc
I/mobile-ffmpeg: (default)
I/mobile-ffmpeg: Metadata:
 handler_name : 
 VideoHandler
I/mobile-ffmpeg: Stream #0:1
I/mobile-ffmpeg: (und)
 : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
 (default)
I/mobile-ffmpeg: Metadata:
I/mobile-ffmpeg: handler_name : 
 SoundHandler
W/mobile-ffmpeg: Codec AVOption preset (Configuration preset) specified for output file #0 (/storage/emulated/0/Download/QuranYaser/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001_sub.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
I/mobile-ffmpeg: Stream mapping:
I/mobile-ffmpeg: Stream #0:0 -> #0:0
I/mobile-ffmpeg: (mpeg4 (native) -> mpeg4 (native))
I/mobile-ffmpeg: Stream #0:1 -> #0:1
 (aac (native) -> aac (native))
I/mobile-ffmpeg: Press [q] to stop, [?] for help
 frame= 0 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A 
I/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] Shaper: FriBidi 1.0.9 (SIMPLE)
I/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] 
W/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] No usable fontconfig configuration file found, using fallback.
 [Parsed_subtitles_0 @ 0xf35ee820] 
I/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] Using font provider fontconfig
 [Parsed_subtitles_0 @ 0xf35ee820] 
W/mobile-ffmpeg: [graph 0 input from stream 0:0 @ 0xf35ee880] sws_param option is deprecated and ignored
I/mobile-ffmpeg: Output #0, mp4, to '/storage/emulated/0/Download/QuranYaser/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001_sub.mp4':
I/mobile-ffmpeg: Metadata:
 major_brand : 
 isom
I/mobile-ffmpeg: minor_version : 
 512
I/mobile-ffmpeg: compatible_brands: 
I/mobile-ffmpeg: isomiso2mp41
 encoder : 
I/mobile-ffmpeg: Lavf58.48.100
 Stream #0:0
I/mobile-ffmpeg: (und)
 : Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:2 DAR 2:3], q=2-31, 200 kb/s
 , 
I/mobile-ffmpeg: 5 fps, 
I/mobile-ffmpeg: 10240 tbn, 
 5 tbc
I/mobile-ffmpeg: (default)
 Metadata:
I/mobile-ffmpeg: handler_name : 
 VideoHandler
 encoder : 
I/mobile-ffmpeg: Lavc58.96.100 mpeg4
 Side data:
I/mobile-ffmpeg: 
 cpb: 
 bitrate max/min/avg: 0/0/200000 buffer size: 0 
 vbv_delay: N/A
I/mobile-ffmpeg: Stream #0:1
 (und)
I/mobile-ffmpeg: : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
 (default)
 Metadata:
I/mobile-ffmpeg: handler_name : 
 SoundHandler
I/mobile-ffmpeg: encoder : 
 Lavc58.96.100 aac
I/mobile-ffmpeg: frame= 11 fps=0.0 q=2.0 size= 0kB time=00:00:03.59 bitrate= 0.1kbits/s speed=7.16x 
I/mobile-ffmpeg: frame= 30 fps= 30 q=2.0 size= 256kB time=00:00:07.47 bitrate= 280.5kbits/s speed=7.44x 
I/mobile-ffmpeg: frame= 50 fps= 33 q=2.0 size= 512kB time=00:00:11.54 bitrate= 363.5kbits/s speed=7.67x 
I/mobile-ffmpeg: frame= 71 fps= 35 q=2.0 size= 768kB time=00:00:15.71 bitrate= 400.2kbits/s speed=7.83x 
I/mobile-ffmpeg: frame= 92 fps= 37 q=2.0 size= 1024kB time=00:00:19.78 bitrate= 424.0kbits/s speed=7.88x 
I/mobile-ffmpeg: frame= 110 fps= 36 q=2.0 size= 1280kB time=00:00:23.38 bitrate= 448.5kbits/s speed=7.75x 
I/mobile-ffmpeg: frame= 128 fps= 36 q=2.0 size= 1280kB time=00:00:27.12 bitrate= 386.6kbits/s speed=7.71x 
I/mobile-ffmpeg: frame= 148 fps= 38 q=8.4 Lsize= 1697kB time=00:00:29.40 bitrate= 472.9kbits/s speed=7.56x 
 video:1225kB audio:462kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 
I/mobile-ffmpeg: 0.559634%
I/mobile-ffmpeg: [aac @ 0xbe48c800] Qavg: 163.999


here is a sample of srt file I am trying to merge :


1
00:00:00,000 --> 00:00:03,326
 Text 1

2
00:00:03,326 --> 00:00:09,962
 Text 2

3
00:00:09,962 --> 00:00:16,160
 Text 3

4
00:00:16,160 --> 00:00:22,223
 Text 4


any idea why the generated video does not contain the subtitle ?


Update


Based on below comment , I changed my code to use the latest ffmpeg-kit version , here is the new code


String cmd = "-i " + videoPath + " -vf subtitles=\"" + subtitlePAth + ":force_style='Alignment=10,Fontsize=18\" " + 
 outputVideoPath;

 FFmpegKit.executeAsync(cmd, new FFmpegSessionCompleteCallback() {

 @Override
 public void apply(FFmpegSession session) {

 }
 }, new LogCallback() {

 @Override
 public void apply(com.arthenica.ffmpegkit.Log log) {


 }
 }, new StatisticsCallback() {

 @Override
 public void apply(Statistics statistics) { 

 }
 });`


and here is the updated log


ffmpeg version v4.5-dev-3393-g30322ebe3c Copyright (c) 2000-2021 the FFmpeg developers
 built with Android (7155654, based on r399163b1) clang version 11.0.5 (https://android.googlesource.com/toolchain/llvm-project 87f1315dfbea7c137aa2e6d362dbb457e388158d)
 configuration: --cross-prefix=arm-linux-androideabi- --sysroot=/files/android-sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/storage/light/projects/ffmpeg-kit/prebuilt/android-arm-neon/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=armv7-a --cpu=armv7-a --target-os=android --enable-neon --enable-asm --enable-inline-asm --build-suffix=_neon --ar=arm-linux-androideabi-ar --cc=armv7a-linux-androideabi24-clang --cxx=armv7a-linux-androideabi24-clang++ --ranlib=arm-linux-androideabi-ranlib --strip=arm-linux-androideabi-strip --nm=arm-linux-androideabi-nm --extra-libs='-L/storage/light/projects/ffmpeg-kit/prebuilt/android-arm-neon/cpu-features/lib -lndk_compat' --disable-autodetect --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --disable-static --enable-shared --enable-pthreads --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libdav1d --enable-libkvazaar --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-libzimg --disable-openssl --enable-zlib --enable-mediacodec
 libavutil 57. 13.100 / 57. 13.100
 libavcodec 59. 15.102 / 59. 15.102
 libavformat 59. 10.100 / 59. 10.100
 libavdevice 59. 1.100 / 59. 1.100
 libavfilter 8. 21.100 / 8. 21.100
 libswscale 6. 1.102 / 6. 1.102
 libswresample 4. 0.100 / 4. 0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2mp41
 encoder : Lavf59.10.100
 Duration: 00:00:29.60, start: 0.000000, bitrate: 467 kb/s
 Stream #0:0[0x1](und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, bt470bg/bt709/bt709), 640x480 [SAR 1:2 DAR 2:3], 336 kb/s, 5 fps, 5 tbr, 10240 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 Stream #0:1[0x2](und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 [mpeg4 @ 0xbacc1080] The "sub_text_format" option is deprecated: Deprecated, does nothing
 [aac @ 0xbacc1400] The "sub_text_format" option is deprecated: Deprecated, does nothing
 Stream mapping:
 Stream #0:0 -> #0:0 (mpeg4 (native) -> mpeg4 (native))
 Stream #0:1 -> #0:1 (aac (native) -> aac (native))
 Press [q] to stop, [?] for help
 [Parsed_subtitles_0 @ 0xf35141e0] libass API version: 0x1502000[Parsed_subtitles_0 @ 0xf35141e0] 
 [Parsed_subtitles_0 @ 0xf35141e0] libass source: commit: 0.15.2-0-gc967a5a3d9ec0d36af1148b3fdf2f307a21dd122[Parsed_subtitles_0 @ 0xf35141e0] 
 [Parsed_subtitles_0 @ 0xf35141e0] Shaper: FriBidi 1.0.11 (SIMPLE) HarfBuzz-ng 3.2.0 (COMPLEX)[Parsed_subtitles_0 @ 0xf35141e0] 
 [Parsed_subtitles_0 @ 0xf35141e0] No usable fontconfig configuration file found, using fallback.[Parsed_subtitles_0 @ 0xf35141e0] 
 [Parsed_subtitles_0 @ 0xf35141e0] Using font provider fontconfig[Parsed_subtitles_0 @ 0xf35141e0] 
 [Parsed_subtitles_0 @ 0xf35141e0] fontselect: failed to find any fallback with glyph 0x0 for font: (Arial, 400, 0)[Parsed_subtitles_0 @ 0xf35141e0] 
 Output #0, mp4, to '/storage/emulated/0/Download/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001_sub5.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2mp41
 encoder : Lavf59.10.100
 Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, bt470bg/bt709/bt709, progressive), 640x480 [SAR 1:2 DAR 2:3], q=2-31, 200 kb/s, 5 fps, 10240 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.15.102 mpeg4
 Side data:
 cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
 Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.15.102 aac
 frame= 1 fps=0.0 q=5.7 size= 0kB time=00:00:01.55 bitrate= 0.2kbits/s speed= 2.4x 
 frame= 10 fps=8.7 q=2.0 size= 0kB time=00:00:03.50 bitrate= 0.1kbits/s speed=3.04x 
 frame= 20 fps= 12 q=2.0 size= 0kB time=00:00:05.36 bitrate= 0.1kbits/s speed=3.24x 
 frame= 32 fps= 15 q=2.0 size= 256kB time=00:00:07.87 bitrate= 266.5kbits/s speed=3.65x 
 frame= 45 fps= 17 q=2.0 size= 256kB time=00:00:10.49 bitrate= 199.8kbits/s speed=3.95x 
 frame= 58 fps= 18 q=2.0 size= 512kB time=00:00:12.97 bitrate= 323.2kbits/s speed=4.11x 
 frame= 69 fps= 19 q=2.0 size= 768kB time=00:00:15.23 bitrate= 413.1kbits/s speed=4.16x 
 frame= 81 fps= 19 q=2.0 size= 768kB time=00:00:17.60 bitrate= 357.5kbits/s speed=4.23x 
 frame= 92 fps= 20 q=2.0 size= 1024kB time=00:00:19.85 bitrate= 422.6kbits/s speed=4.26x 
 frame= 102 fps= 20 q=2.0 size= 1024kB time=00:00:21.89 bitrate= 383.1kbits/s speed=4.24x 
 frame= 115 fps= 20 q=2.0 size= 1280kB time=00:00:24.40 bitrate= 429.7kbits/s speed=4.31x 
 frame= 126 fps= 20 q=2.0 size= 1280kB time=00:00:26.67 bitrate= 393.0kbits/s speed=4.32x 
 frame= 139 fps= 21 q=2.0 size= 1536kB time=00:00:29.28 bitrate= 429.8kbits/s speed=4.39x 
 frame= 148 fps= 22 q=8.4 Lsize= 1701kB time=00:00:29.40 bitrate= 473.9kbits/s speed=4.34x 
 video:1225kB audio:466kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.561835%
 [aac @ 0xbacc2200] Qavg: 482.514


-
Concat failing with ffmpeg 5.0 vs ffmpeg 4.1.1
16 avril 2022, par WoolwitI have ffmpeg 5.0 installed on a new Silicon M1 Mac Mini running Monterey and concat is failing with the same command that has served me well on ffmpeg 4.1.1 lo, all these many years. Anyone have an idea why this command would fail on the newer version of ffmpeg.
This is with the exact same mp4 files. The ffmpeg 4.1.1. completes the concat in less than a minute.


ffmpeg -i vid1.mp4 -i vid2.mp4 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4



Thank you !


ffmpeg 4.1.1 Info and output...


$ ffmpeg -version
ffmpeg version 4.1.1 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom -


$ ffmpeg -i vid1.mp4 -i vid2.mp4 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4
ffmpeg version 4.1.1 Copyright (c) 2000-2019 the FFmpeg developers
 built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr --enable-libvidstab
 libavutil 56. 22.100 / 56. 22.100
 libavcodec 58. 35.100 / 58. 35.100
 libavformat 58. 20.100 / 58. 20.100
 libavdevice 58. 5.100 / 58. 5.100
 libavfilter 7. 40.101 / 7. 40.101
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 3.100 / 5. 3.100
 libswresample 3. 3.100 / 3. 3.100
 libpostproc 55. 3.100 / 55. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vid1.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.16.100
 Duration: 00:00:13.01, start: 0.000000, bitrate: 1240 kb/s
 Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x480, 1103 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default)
 Metadata:
 handler_name : VideoHandler
 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'vid2.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.16.100
 Duration: 00:00:07.00, start: 0.000000, bitrate: 122 kb/s
 Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x480 [SAR 1:1 DAR 3:2], 112 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
 Metadata:
 handler_name : VideoHandler
 Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
 Metadata:
 handler_name : SoundHandler
Stream mapping:
 Stream #0:0 (h264) -> concat:in0:v0
 Stream #0:1 (aac) -> concat:in0:a0
 Stream #1:0 (h264) -> concat:in1:v0
 Stream #1:1 (aac) -> concat:in1:a0
 concat:out:v0 -> Stream #0:0 (libx264)
 concat:out:a0 -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 0x7fd56881dc00] using SAR=1/1
[libx264 @ 0x7fd56881dc00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0x7fd56881dc00] profile High, level 3.0
[libx264 @ 0x7fd56881dc00] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=3 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=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf58.20.100
 Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 720x480 [SAR 1:1 DAR 3:2], q=-1--1, 29.97 fps, 11988 tbn, 29.97 tbc (default)
 Metadata:
 encoder : Lavc58.35.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 encoder : Lavc58.35.100 aac
frame= 46 fps=0.0 q=0.0 size= 0kB time=00:00:01.55 bitrate= 0.2kbits/s spframe= 64 fps= 57 q=26.0 size= 0kB time=00:00:02.15 bitrate= 0.2kbits/s sframe= 83 fps= 51 q=29.0 size= 0kB time=00:00:02.78 bitrate= 0.1kbits/s sframe= 106 fps= 49 q=26.0 size= 0kB time=00:00:03.55 bitrate= 0.1kbits/s sframe= 131 fps= 49 q=29.0 size= 256kB time=00:00:04.38 bitrate= 478.0kbits/s sframe= 155 fps= 49 q=29.0 size= 256kB time=00:00:05.20 bitrate= 403.3kbits/s sframe= 178 fps= 48 q=29.0 size= 512kB time=00:00:05.96 bitrate= 702.9kbits/s sframe= 198 fps= 47 q=26.0 size= 512kB time=00:00:06.61 bitrate= 633.9kbits/s sframe= 218 fps= 46 q=29.0 size= 512kB time=00:00:07.26 bitrate= 577.2kbits/s sframe= 238 fps= 46 q=29.0 size= 768kB time=00:00:07.96 bitrate= 790.0kbits/s sframe= 255 fps= 44 q=29.0 size= 768kB time=00:00:08.52 bitrate= 738.3kbits/s sframe= 278 fps= 45 q=26.0 size= 768kB time=00:00:09.28 bitrate= 677.4kbits/s sframe= 296 fps= 44 q=29.0 size= 1024kB time=00:00:09.89 bitrate= 848.1kbits/s sframe= 317 fps= 43 q=29.0 size= 1024kB time=00:00:10.58 bitrate= 792.3kbits/s sframe= 333 fps= 42 q=29.0 size= 1024kB time=00:00:11.12 bitrate= 754.2kbits/s sframe= 351 fps= 42 q=29.0 size= 1024kB time=00:00:11.72 bitrate= 715.4kbits/s sframe= 363 fps= 41 q=29.0 size= 1024kB time=00:00:12.14 bitrate= 690.8kbits/s sframe= 377 fps= 40 q=29.0 size= 1280kB time=00:00:12.60 bitrate= 831.7kbits/s sframe= 389 fps= 39 q=29.0 size= 1280kB time=00:00:12.95 bitrate= 809.3kbits/s sframe= 401 fps= 38 q=29.0 size= 1280kB time=00:00:13.39 bitrate= 782.7kbits/s dframe= 410 fps= 37 q=29.0 size= 1280kB time=00:00:13.72 bitrate= 764.1kbits/s dframe= 425 fps= 37 q=29.0 size= 1536kB time=00:00:14.18 bitrate= 886.9kbits/s dframe= 446 fps= 37 q=29.0 size= 1536kB time=00:00:14.90 bitrate= 844.1kbits/s dframe= 506 fps= 40 q=29.0 size= 1536kB time=00:00:16.90 bitrate= 744.4kbits/s dframe= 564 fps= 43 q=29.0 size= 1536kB time=00:00:18.83 bitrate= 668.2kbits/s dframe= 600 fps= 44 q=-1.0 Lsize= 1807kB time=00:00:20.03 bitrate= 738.9kbits/s dup=35 drop=0 speed=1.45x 
video:1580kB audio:206kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.204253%
[libx264 @ 0x7fd56881dc00] frame I:74 Avg QP:19.97 size: 9747
[libx264 @ 0x7fd56881dc00] frame P:205 Avg QP:19.82 size: 2384
[libx264 @ 0x7fd56881dc00] frame B:321 Avg QP:20.41 size: 1269
[libx264 @ 0x7fd56881dc00] consecutive B-frames: 25.8% 5.3% 9.5% 59.3%
[libx264 @ 0x7fd56881dc00] mb I I16..4: 17.8% 79.7% 2.5%
[libx264 @ 0x7fd56881dc00] mb P I16..4: 2.7% 5.7% 0.7% P16..4: 17.7% 3.1% 1.2% 0.0% 0.0% skip:68.8%
[libx264 @ 0x7fd56881dc00] mb B I16..4: 0.3% 1.1% 0.1% B16..8: 18.4% 1.7% 0.2% direct: 1.6% skip:76.5% L0:57.0% L1:40.0% BI: 3.0%
[libx264 @ 0x7fd56881dc00] 8x8 transform intra:75.9% inter:87.2%
[libx264 @ 0x7fd56881dc00] coded y,uvDC,uvAC intra: 54.9% 8.2% 1.3% inter: 6.5% 6.0% 0.9%
[libx264 @ 0x7fd56881dc00] i16 v,h,dc,p: 44% 34% 14% 8%
[libx264 @ 0x7fd56881dc00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 22% 30% 4% 5% 3% 5% 3% 5%
[libx264 @ 0x7fd56881dc00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 41% 29% 1% 2% 2% 2% 1% 1%
[libx264 @ 0x7fd56881dc00] i8c dc,h,v,p: 92% 5% 1% 1%
[libx264 @ 0x7fd56881dc00] Weighted P-Frames: Y:1.5% UV:0.5%
[libx264 @ 0x7fd56881dc00] ref P L0: 58.7% 9.7% 21.6% 10.0% 0.1%
[libx264 @ 0x7fd56881dc00] ref B L0: 85.1% 11.6% 3.3%
[libx264 @ 0x7fd56881dc00] ref B L1: 95.7% 4.3%
[libx264 @ 0x7fd56881dc00] kb/s:646.32
[aac @ 0x7fd56881f400] Qavg: 23136.783
$


ffmpeg 5.0 Info and output... It never completes


% ffmpeg -version
ffmpeg version 5.0-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2022 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.17)

% ffmpeg -i vid1.mp4 -i vid2.mp4 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4
ffmpeg version 5.0-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2022 the FFmpeg developers
 built with Apple clang version 11.0.0 (clang-1100.0.33.17)
 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-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
 libavutil 57. 17.100 / 57. 17.100
 libavcodec 59. 18.100 / 59. 18.100
 libavformat 59. 16.100 / 59. 16.100
 libavdevice 59. 4.100 / 59. 4.100
 libavfilter 8. 24.100 / 8. 24.100
 libswscale 6. 4.100 / 6. 4.100
 libswresample 4. 3.100 / 4. 3.100
 libpostproc 56. 3.100 / 56. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vid1.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.16.100
 Duration: 00:00:13.01, start: 0.000000, bitrate: 1240 kb/s
 Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 720x480, 1103 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'vid2.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.16.100
 Duration: 00:00:07.00, start: 0.000000, bitrate: 122 kb/s
 Stream #1:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 720x480 [SAR 1:1 DAR 3:2], 112 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 Stream #1:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
Stream mapping:
 Stream #0:0 (h264) -> concat
 Stream #0:1 (aac) -> concat
 Stream #1:0 (h264) -> concat
 Stream #1:1 (aac) -> concat
 concat -> Stream #0:0 (libx264)
 concat -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[mp4 @ 0x7fbab280dbc0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[libx264 @ 0x7fbab280e840] using SAR=1/1
[libx264 @ 0x7fbab280e840] MB rate (1350000000) > level limit (16711680)
[libx264 @ 0x7fbab280e840] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x7fbab280e840] profile High, level 6.2, 4:2:0, 8-bit
[libx264 @ 0x7fbab280e840] 264 - core 164 r3081 19856cc - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=12 lookahead_threads=2 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=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf59.16.100
 Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(progressive), 720x480 [SAR 1:1 DAR 3:2], q=2-31, 1000k tbn
 Metadata:
 encoder : Lavc59.18.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc59.18.100 aac
frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:00.23 bitrate= 1.7kbits/sMore than 1000 frames duplicated
frame=33367 fps=843 q=33.0 size= 2048kB time=00:00:00.27 bitrate=60212.7kbitsMore than 10000 frames duplicatedx 
frame=66733 fps=841 q=33.0 size= 4352kB time=00:00:00.32 bitrate=109671.7kbitMore than 100000 frames duplicatedx 
frame=100100 fps=825 q=33.0 size= 6656kB time=00:00:00.34 bitrate=156550.4kbiframe=133467 fps=806 q=33.0 size= 8704kB time=00:00:00.39 bitrate=180634.7kbiframe=166834 fps=810 q=33.0 size= 11008kB time=00:00:00.41 bitrate=215757.8kbiframe=200200 fps=812 q=33.0 size= 13312kB time=00:00:00.46 bitrate=234824.6kbiframe=233567 fps=814 q=33.0 size= 153
...


-
ffmpeg droping framerate on capture device
8 avril 2022, par Rudii have a hdmi capture device which seems to drop frames every now and then :


ffmpeg version 4.1.8-0+enter code heredeb10u1+rpt1 Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 8 (Raspbian 8.3.0-6+rpi1)
 configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --libdir=/usr/lib/arm-linux-gnueabihf --cpu=arm1176jzf-s --arch=arm
 WARNING: library configuration mismatch
 avutil configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avcodec configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avformat configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avdevice configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avfilter configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avresample configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 swscale configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 swresample configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 postproc configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 libavutil 56. 22.100 / 56. 22.100
 libavcodec 58. 35.100 / 58. 35.100
 libavformat 58. 20.100 / 58. 20.100
 libavdevice 58. 5.100 / 58. 5.100
 libavfilter 7. 40.101 / 7. 40.101
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 3.100 / 5. 3.100
 libswresample 3. 3.100 / 3. 3.100
 libpostproc 55. 3.100 / 55. 3.100
[mjpeg @ 0x1067210] Found EOI before any SOF, ignoring
[mjpeg @ 0x1067210] No JPEG data found in image
Input #0, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 6996.350004, bitrate: N/A
 Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1920x1080, 60 fps, 60 tbr, 1000k tbn, 1000k tbc
Output #0, mp4, to 'testfjfjfjf.mp4':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: mjpeg (mp4v / 0x7634706D), yuvj422p(pc, bt470bg/unknown/unknown), 1920x1080, q=2-31, 60 fps, 60 tbr, 15360 tbn, 30 tbc
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
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frame= 3239 fps= 60 q=-1.0 size= 372480kB time=00:00:54.36 bitrate=56128.6kbits/s speed= 1x 
frame= 3270 fps= 60 q=-1.0 size= 374784kB time=00:00:54.87 bitrate=55944.7kbits/s speed= 1x 
frame= 3300 fps= 60 q=-1.0 size= 377088kB time=00:00:55.37 bitrate=55780.3kbits/s speed= 1x 
frame= 3331 fps= 60 q=-1.0 size= 379392kB time=00:00:55.89 bitrate=55599.0kbits/s speed= 1x 
frame= 3361 fps= 60 q=-1.0 size= 381696kB time=00:00:56.39 bitrate=55440.7kbits/s speed= 1x 
frame= 3392 fps= 60 q=-1.0 size= 384256kB time=00:00:56.91 bitrate=55306.6kbits/s speed= 1x 
frame= 3422 fps= 60 q=-1.0 size= 386560kB time=00:00:57.41 bitrate=55153.6kbits/s speed= 1x 
frame= 3452 fps= 60 q=-1.0 size= 388864kB time=00:00:57.91 bitrate=55003.2kbits/s speed= 1x 
frame= 3482 fps= 60 q=-1.0 size= 391168kB time=00:00:58.41 bitrate=54855.5kbits/s speed= 1x 
frame= 3512 fps= 60 q=-1.0 size= 393472kB time=00:00:58.91 bitrate=54710.2kbits/s speed= 1x 
frame= 3543 fps= 60 q=-1.0 size= 395776kB time=00:00:59.43 bitrate=54552.7kbits/s speed= 1x 
frame= 3556 fps= 59 q=-1.0 size= 396800kB time=00:00:59.64 bitrate=54495.9kbits/s speed=0.991x 
frame= 3616 fps= 60 q=-1.0 size= 401408kB time=00:01:00.71 bitrate=54158.8kbits/s speed= 1x 
frame= 3646 fps= 60 q=-1.0 size= 403712kB time=00:01:01.21 bitrate=54024.8kbits/s speed= 1x 
frame= 3677 fps= 60 q=-1.0 size= 406016kB time=00:01:01.73 bitrate=53878.8kbits/s speed= 1x 
frame= 3707 fps= 60 q=-1.0 size= 408320kB time=00:01:02.23 bitrate=53749.2kbits/s speed= 1x 
frame= 3738 fps= 60 q=-1.0 size= 410880kB time=00:01:02.74 bitrate=53641.3kbits/s speed= 1x 
frame= 3768 fps= 60 q=-1.0 size= 413184kB time=00:01:03.24 bitrate=53515.6kbits/s speed= 1x 
frame= 3799 fps= 60 q=-1.0 size= 415488kB time=00:01:03.76 bitrate=53378.4kbits/s speed= 1x 
frame= 3829 fps= 60 q=-1.0 size= 417792kB time=00:01:04.26 bitrate=53256.9kbits/s speed= 1x 
frame= 3859 fps= 60 q=-1.0 size= 420096kB time=00:01:04.76 bitrate=53137.1kbits/s speed= 1x 
frame= 3890 fps= 60 q=-1.0 size= 422400kB time=00:01:05.28 bitrate=53006.0kbits/s speed= 1x 
frame= 3920 fps= 60 q=-1.0 size= 424704kB time=00:01:05.78 bitrate=52890.1kbits/s speed= 1x 
frame= 3922 fps= 60 q=-1.0 Lsize= 425098kB time=00:01:05.81 bitrate=52913.4kbits/s speed= 1x 
video:425055kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.010058%
Exiting normally, received signal 2.


in my opinion this shouldn't be much of a problem but when i play back the file it has some pretty good "cuts" in there as if the video skips for half of a second. But on a framerate of 60 there must have been a framedrop of 30 frames to achieve this or am i wrong ?


my record script :


ffmpeg -r 60 -loglevel quiet -an -i /dev/video0 -preset ultrafast -vcodec copy test.mp4


is there a way to "smoothen" the loss of frames as seen in the logfile ?


or is there a way to determine what causes the framedrops ? If it is ffmpeg, heavy CPU load or the capture device itself ?


thanks a lot cheers Rudi


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