Video FFmpeg-以不同分辨率连接视频
我目前有一个android应用程序，其中视频使用ffmpeg的concat进行组合。那很好。但是，当我向其中一个视频添加文本（使用drawtext）时，再次组合视频后，组合的视频会失真。带有drawtext的视频显示良好，但是没有文本的视频会切换方向 我认为问题的根源在于，我的android手机上的垂直视频分辨率为1920x1080，但如果我在执行drawtext时使用该分辨率作为刻度，它将变为水平 我想举个例子可以更好地解释这一点。假设我有两个垂直录制的视频，我将它们与concat结合起来。合并后的视频显示得很好。然后，如果我使用drawtext将文本添加到第一个视频中，则组合视频将以正常方向（垂直方向）显示第一个视频（带文本）。但是，当它转换到下一个视频时，它首先会暂停几秒钟，然后以水平方向显示第二个视频 另外，我也尝试过将纵横比设为1:1，这样就没关系了，但第二个视频的方向仍然是逆时针变化的 谢谢你的帮助，如果需要的话，很高兴补充更多的说明 这是为了添加文本：Video FFmpeg-以不同分辨率连接视频,video,ffmpeg,Video,Ffmpeg,我目前有一个android应用程序，其中视频使用ffmpeg的concat进行组合。那很好。但是，当我向其中一个视频添加文本（使用drawtext）时，再次组合视频后，组合的视频会失真。带有drawtext的视频显示良好，但是没有文本的视频会切换方向 我认为问题的根源在于，我的android手机上的垂直视频分辨率为1920x1080，但如果我在执行drawtext时使用该分辨率作为刻度，它将变为水平 我想举个例子可以更好地解释这一点。假设我有两个垂直录制的视频，我将它们与concat结合起来。合
ffmpeg -i input.mp4 -vf drawbox=y=ih-200:color=black@0.5:width=iw:height=200:t=max
,drawtext=fontfile=RobotoRegular.ttf:text='Text':x=(w-text_w)/2:y=(h-text_h)-100:fontsize=70:fontcolor=white
-c:v libx264 -b:v 17000k -r 30 -preset ultrafast -y output.mp4
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/Android/data/com.me.app/files/65/VID_20170802_111518.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2017-08-02 18:15:20
com.android.version: 7.0
Duration: 00:00:00.93, start: 0.000000, bitrate: 16415 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 16408 kb/s, SAR 1:1 DAR 16:9, 28.94 fps, 30 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 90
creation_time : 2017-08-02 18:15:20
handler_name : VideoHandle
Side data:
displaymatrix: rotation of -90.00 degrees
[libx264 @ 0xeab7ec00] using SAR=1/1
[libx264 @ 0xeab7ec00] using cpu capabilities: none!
[libx264 @ 0xeab7ec00] profile Constrained Baseline, level 4.1
[libx264 @ 0xeab7ec00] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=abr mbtree=0 bitrate=17000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to '/storage/emulated/0/Android/data/com.me.app/files/65/temp.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
com.android.version: 7.0
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=-1--1, 17000 kb/s, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandle
creation_time : 2017-08-02 18:15:20
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 6 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=1 drop=0 speed= 0x
frame= 10 fps=8.8 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=1 drop=0 speed= 0x
frame= 14 fps=8.4 q=15.0 size= 155kB time=00:00:00.03 bitrate=38067.5kbits/s dup=1 drop=0 speed=0.0201x
frame= 18 fps=8.0 q=22.0 size= 744kB time=00:00:00.16 bitrate=36592.5kb
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
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xe762a600] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from '/storage/emulated/0/Android/data/com.me.app/files/64/TXT_20170802_110325.txt':
Duration: N/A, start: 0.000000, bitrate: 23403 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], 23403 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
Metadata:
handler_name : VideoHandler
Output #0, mp4, to '/storage/emulated/0/Android/data/com.me.app/files/64/VID_20170802_110325concat.mp4':
Metadata:
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=2-31, 23403 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xe762a600] Auto-inserting h264_mp4toannexb bitstream filter
frame= 64 fps=0.0 q=-1.0 Lsize= 5218kB time=00:00:12.30 bitrate=3474.5kbits/s speed= 122x
video:5217kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025721%
ffmpeg-f concat-safe 0-i input.mp4-c copy-y output.mp4ffmpeg 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/Android/data/com.me.app/files/65/VID_20170802_111518.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2017-08-02 18:15:20
com.android.version: 7.0
Duration: 00:00:00.93, start: 0.000000, bitrate: 16415 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 16408 kb/s, SAR 1:1 DAR 16:9, 28.94 fps, 30 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 90
creation_time : 2017-08-02 18:15:20
handler_name : VideoHandle
Side data:
displaymatrix: rotation of -90.00 degrees
[libx264 @ 0xeab7ec00] using SAR=1/1
[libx264 @ 0xeab7ec00] using cpu capabilities: none!
[libx264 @ 0xeab7ec00] profile Constrained Baseline, level 4.1
[libx264 @ 0xeab7ec00] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=abr mbtree=0 bitrate=17000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to '/storage/emulated/0/Android/data/com.me.app/files/65/temp.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
com.android.version: 7.0
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=-1--1, 17000 kb/s, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandle
creation_time : 2017-08-02 18:15:20
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 6 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=1 drop=0 speed= 0x
frame= 10 fps=8.8 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=1 drop=0 speed= 0x
frame= 14 fps=8.4 q=15.0 size= 155kB time=00:00:00.03 bitrate=38067.5kbits/s dup=1 drop=0 speed=0.0201x
frame= 18 fps=8.0 q=22.0 size= 744kB time=00:00:00.16 bitrate=36592.5kb
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
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xe762a600] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from '/storage/emulated/0/Android/data/com.me.app/files/64/TXT_20170802_110325.txt':
Duration: N/A, start: 0.000000, bitrate: 23403 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], 23403 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
Metadata:
handler_name : VideoHandler
Output #0, mp4, to '/storage/emulated/0/Android/data/com.me.app/files/64/VID_20170802_110325concat.mp4':
Metadata:
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=2-31, 23403 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xe762a600] Auto-inserting h264_mp4toannexb bitstream filter
frame= 64 fps=0.0 q=-1.0 Lsize= 5218kB time=00:00:12.30 bitrate=3474.5kbits/s speed= 122x
video:5217kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025721%
从日志中，您可以看到源代码是1920x1080，元数据旋转90。在drawtext之后，输出为1080x1920，没有元数据 然后将1080x1920无旋转视频和1920x1080旋转90的视频连接在一起。最终输出为不旋转的一半1080x1920和一半1920x1080视频 我的建议是使用转置过滤器将视频旋转到0度，然后再进行处理和压缩 更新 如果要保持原始旋转，需要在中间缓冲区上绘制文本，旋转它，然后与输入重叠。您可能还需要将元数据添加到输出中。示例命令如下所示：
ffmpeg -f lavfi -i color=color=0x000000@0.0:s=1080x1920,format=yuva444p -noautorotate -i input.mp4 \
-filter_complex "[0:v]drawbox=y=ih-200:color=black@0.5:width=iw:height=200:t=max,drawtext=fontfile=RobotoRegular.ttf:text='Text':x=(w-text_w)/2:y=(h-text_h)-100:fontsize=70:fontcolor=white,transpose=dir=2,[1:v]overlay" \
-c:v libx264 -b:v 17000k -r 30 -preset ultrafast -y output1.mp4
ffmpeg -i output1.mp4 -c copy -metadata:s:v:0 rotate=-90 output2.mp4
然后，您可以使用另一个旋转的源来解析输出。需要查看您的命令和完整的控制台输出。也可能是您的输入文件。在添加了
-report