I'm having problems with transitions. To be sure I am not making something
wrong, I simply copy/paste the example shown in
https://ffmpeg.org/ffmpeg-filters.html#xfade, adjusted my two video file
names to comply with the example, and got the same problems as with my own
commands.
The example on the site shows this: ffmpeg -i first.mp4 -i second.mp4
-filter_complex xfade=transition=fade:duration=2:offset=5 output.mp4
My first and second files have 1 min each.
First I run the command without any change; obviously offset 5 isn't
appropriate but I gave it a try.
Second I adjusted duration to 10 and offset to 55 to be appropriate with my
two mp4 files. The result was the same:
The final output.mp4 has the right duration (1:55) but it is totally black.
What I see during execution is that the first video is read/copied to
output.mp4 quite fast. After that it starts reading second.mp4 and works a
very long time on it, probably close to one minute.
Attached are the two console outputs. Transition_01 has duration=2 and
offset=5 while transition_02 has duration=10 and offset=55. Unfortunately I
don't have the knowledge to find out if this output provides any hint of
what is wrong. Any help is appreciated.
Thanks
D:\99_FFMpeg>D:\01_Apl\ffmpeg\bin\ffmpeg.exe -i first.mp4 -i second.mp4
-filter_complex xfade=transition=fade:duration=2:offset=5 output.mp4
ffmpeg version 2021-03-14-git-1d61a31497-essentials_build-www.gyan.dev
Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static
--disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib
--enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
--enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass
--enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf
--enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid
--enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va
--enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt
--enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora
--enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
libavutil 56. 68.100 / 56. 68.100
libavcodec 58.131.100 / 58.131.100
libavformat 58. 74.100 / 58. 74.100
libavdevice 58. 12.100 / 58. 12.100
libavfilter 7.109.100 / 7.109.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'first.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.74.100
Duration: 00:01:00.08, start: 0.000000, bitrate: 3818 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 3622 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 181 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'second.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.74.100
Duration: 00:01:00.08, start: 0.000000, bitrate: 3274 kb/s
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 3063 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 193 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 (h264) -> xfade:main (graph 0)
Stream #1:0 (h264) -> xfade:xfade (graph 0)
xfade (graph 0) -> Stream #0:0 (libx264)
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 000001d2e9bdfa80] using SAR=1/1
[libx264 @ 000001d2e9bdfa80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX FMA3 BMI2 AVX2
[libx264 @ 000001d2e9bdfa80] profile High 4:4:4 Predictive, level 4.2, 4:4:4,
8-bit
[libx264 @ 000001d2e9bdfa80] 264 - core 161 r3048 b86ae3c - 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=4 threads=9 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 : Lavf58.74.100
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv444p(tv, progressive),
1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 60 fps, 15360 tbn (default)
Metadata:
encoder : Lavc58.131.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]
encoder : Lavc58.131.100 aac
frame= 3905 fps= 64 q=-1.0 Lsize= 15919kB time=00:01:05.03
bitrate=2005.3kbits/s dup=3 drop=0 speed=1.06x
video:14926kB audio:881kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.714643%
[libx264 @ 000001d2e9bdfa80] frame I:18 Avg QP:17.32 size: 66334
[libx264 @ 000001d2e9bdfa80] frame P:1072 Avg QP:19.60 size: 10334
[libx264 @ 000001d2e9bdfa80] frame B:2815 Avg QP:23.36 size: 1070
[libx264 @ 000001d2e9bdfa80] consecutive B-frames: 0.9% 7.8% 2.9% 88.3%
[libx264 @ 000001d2e9bdfa80] mb I I16..4: 39.6% 49.7% 10.7%
[libx264 @ 000001d2e9bdfa80] mb P I16..4: 3.6% 3.1% 0.3% P16..4: 12.8%
3.0% 1.2% 0.0% 0.0% skip:75.9%
[libx264 @ 000001d2e9bdfa80] mb B I16..4: 0.1% 0.1% 0.0% B16..8: 6.9%
0.2% 0.0% direct: 0.1% skip:92.7% L0:40.5% L1:57.9% BI: 1.6%
[libx264 @ 000001d2e9bdfa80] 8x8 transform intra:44.8% inter:82.5%
[libx264 @ 000001d2e9bdfa80] coded y,u,v intra: 17.4% 10.6% 11.7% inter: 1.5%
0.8% 0.8%
[libx264 @ 000001d2e9bdfa80] i16 v,h,dc,p: 60% 25% 8% 7%
[libx264 @ 000001d2e9bdfa80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 12% 52% 2% 2%
3% 2% 2% 2%
[libx264 @ 000001d2e9bdfa80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 35% 14% 3% 4%
4% 3% 3% 3%
[libx264 @ 000001d2e9bdfa80] Weighted P-Frames: Y:0.3% UV:0.1%
[libx264 @ 000001d2e9bdfa80] ref P L0: 67.0% 11.5% 15.1% 6.4% 0.0%
[libx264 @ 000001d2e9bdfa80] ref B L0: 91.3% 7.2% 1.6%
[libx264 @ 000001d2e9bdfa80] ref B L1: 98.1% 1.9%
[libx264 @ 000001d2e9bdfa80] kb/s:1878.64
[aac @ 000001d2e9ba4dc0] Qavg: 4635.114
D:\99_FFMpeg>
D:\99_FFMpeg>D:\01_Apl\ffmpeg\bin\ffmpeg.exe -i first.mp4 -i second.mp4
-filter_complex xfade=transition=fade:duration=10:offset=55 output.mp4
ffmpeg version 2021-03-14-git-1d61a31497-essentials_build-www.gyan.dev
Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static
--disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib
--enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
--enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass
--enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf
--enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid
--enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va
--enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt
--enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora
--enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
libavutil 56. 68.100 / 56. 68.100
libavcodec 58.131.100 / 58.131.100
libavformat 58. 74.100 / 58. 74.100
libavdevice 58. 12.100 / 58. 12.100
libavfilter 7.109.100 / 7.109.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'first.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.74.100
Duration: 00:01:00.08, start: 0.000000, bitrate: 3818 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 3622 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 181 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'second.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.74.100
Duration: 00:01:00.08, start: 0.000000, bitrate: 3274 kb/s
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 3063 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 193 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 (h264) -> xfade:main (graph 0)
Stream #1:0 (h264) -> xfade:xfade (graph 0)
xfade (graph 0) -> Stream #0:0 (libx264)
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 00000205d144fa80] using SAR=1/1
[libx264 @ 00000205d144fa80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX FMA3 BMI2 AVX2
[libx264 @ 00000205d144fa80] profile High 4:4:4 Predictive, level 4.2, 4:4:4,
8-bit
[libx264 @ 00000205d144fa80] 264 - core 161 r3048 b86ae3c - 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=4 threads=9 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 : Lavf58.74.100
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv444p(tv, progressive),
1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 60 fps, 15360 tbn (default)
Metadata:
encoder : Lavc58.131.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]
encoder : Lavc58.131.100 aac
frame= 6908 fps= 91 q=-1.0 Lsize= 31890kB time=00:01:55.08
bitrate=2270.0kbits/s dup=6 drop=0 speed=1.52x
video:30861kB audio:881kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.466147%
[libx264 @ 00000205d144fa80] frame I:36 Avg QP:17.96 size: 57003
[libx264 @ 00000205d144fa80] frame P:1889 Avg QP:20.32 size: 12279
[libx264 @ 00000205d144fa80] frame B:4983 Avg QP:23.93 size: 1275
[libx264 @ 00000205d144fa80] consecutive B-frames: 1.1% 7.0% 3.5% 88.4%
[libx264 @ 00000205d144fa80] mb I I16..4: 36.9% 53.9% 9.2%
[libx264 @ 00000205d144fa80] mb P I16..4: 4.5% 4.1% 0.5% P16..4: 14.4%
3.4% 1.4% 0.0% 0.0% skip:71.6%
[libx264 @ 00000205d144fa80] mb B I16..4: 0.1% 0.1% 0.0% B16..8: 7.9%
0.3% 0.0% direct: 0.1% skip:91.5% L0:42.1% L1:55.9% BI: 2.0%
[libx264 @ 00000205d144fa80] 8x8 transform intra:46.6% inter:82.4%
[libx264 @ 00000205d144fa80] coded y,u,v intra: 20.2% 10.3% 11.9% inter: 1.7%
0.8% 0.9%
[libx264 @ 00000205d144fa80] i16 v,h,dc,p: 53% 28% 9% 9%
[libx264 @ 00000205d144fa80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 15% 47% 2% 2%
3% 2% 3% 3%
[libx264 @ 00000205d144fa80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 42% 15% 3% 3%
3% 3% 3% 2%
[libx264 @ 00000205d144fa80] Weighted P-Frames: Y:0.2% UV:0.1%
[libx264 @ 00000205d144fa80] ref P L0: 67.1% 11.5% 15.1% 6.3% 0.0%
[libx264 @ 00000205d144fa80] ref B L0: 91.3% 7.1% 1.6%
[libx264 @ 00000205d144fa80] ref B L1: 98.1% 1.9%
[libx264 @ 00000205d144fa80] kb/s:2195.81
[aac @ 00000205d1413b80] Qavg: 4635.114
D:\99_FFMpeg>
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