Re: [FFmpeg-user] Mix a video with an audio file
On 1/19/20, Michael Koch wrote: > Am 19.01.2020 um 21:56 schrieb Paul B Mahol: >> On 1/19/20, Michael Koch wrote: >>> Am 19.01.2020 um 21:01 schrieb Paul B Mahol: On 1/19/20, Michael Koch wrote: > Hello, > > I've just found a problem that can be reproduced as follows: > > Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when > played. > > ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y > video.mp4 > > > Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone > at t=3s. The file is ok when played. > > ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 > -y audio.wav > > > Step 3: Combine both files into one video, and the audio sources shall > be mixed: > > ffmpeg -i video.mp4 -i audio.wav -filter_complex > "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 > > The output video has the correct length 6s, but I don't understand why > the 1kHz tone disappears after 4s and the last 2s are silence. > > The console output is below. Can not reproduce using nut container. >>> When I change the output filename to out.nut, then it works as expected >>> (but with terrible image quality). Why doesn't it work with mp4 output? >> Use different video encoder. Who knows? > > When I add -c:v mpeg4 then it works fine. > When I add -c:v libx264 then the audio output is 2s too short. > Is it a bug, or is something wrong with my command line? > Dunno. > Michael > > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Mix a video with an audio file
Am 19.01.2020 um 21:56 schrieb Paul B Mahol: On 1/19/20, Michael Koch wrote: Am 19.01.2020 um 21:01 schrieb Paul B Mahol: On 1/19/20, Michael Koch wrote: Hello, I've just found a problem that can be reproduced as follows: Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when played. ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y video.mp4 Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone at t=3s. The file is ok when played. ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 -y audio.wav Step 3: Combine both files into one video, and the audio sources shall be mixed: ffmpeg -i video.mp4 -i audio.wav -filter_complex "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 The output video has the correct length 6s, but I don't understand why the 1kHz tone disappears after 4s and the last 2s are silence. The console output is below. Can not reproduce using nut container. When I change the output filename to out.nut, then it works as expected (but with terrible image quality). Why doesn't it work with mp4 output? Use different video encoder. Who knows? When I add -c:v mpeg4 then it works fine. When I add -c:v libx264 then the audio output is 2s too short. Is it a bug, or is something wrong with my command line? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Mix a video with an audio file
On 1/19/20, Michael Koch wrote: > Am 19.01.2020 um 21:01 schrieb Paul B Mahol: >> On 1/19/20, Michael Koch wrote: >>> Hello, >>> >>> I've just found a problem that can be reproduced as follows: >>> >>> Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when >>> played. >>> >>> ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y >>> video.mp4 >>> >>> >>> Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone >>> at t=3s. The file is ok when played. >>> >>> ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 >>> -y audio.wav >>> >>> >>> Step 3: Combine both files into one video, and the audio sources shall >>> be mixed: >>> >>> ffmpeg -i video.mp4 -i audio.wav -filter_complex >>> "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 >>> >>> The output video has the correct length 6s, but I don't understand why >>> the 1kHz tone disappears after 4s and the last 2s are silence. >>> >>> The console output is below. >> Can not reproduce using nut container. > > When I change the output filename to out.nut, then it works as expected > (but with terrible image quality). Why doesn't it work with mp4 output? Use different video encoder. Who knows? > > Michael > > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Mix a video with an audio file
Am 19.01.2020 um 21:01 schrieb Paul B Mahol: On 1/19/20, Michael Koch wrote: Hello, I've just found a problem that can be reproduced as follows: Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when played. ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y video.mp4 Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone at t=3s. The file is ok when played. ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 -y audio.wav Step 3: Combine both files into one video, and the audio sources shall be mixed: ffmpeg -i video.mp4 -i audio.wav -filter_complex "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 The output video has the correct length 6s, but I don't understand why the 1kHz tone disappears after 4s and the last 2s are silence. The console output is below. Can not reproduce using nut container. When I change the output filename to out.nut, then it works as expected (but with terrible image quality). Why doesn't it work with mp4 output? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Mix a video with an audio file
On 1/19/20, Michael Koch wrote: > Hello, > > I've just found a problem that can be reproduced as follows: > > Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when > played. > > ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y video.mp4 > > > Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone > at t=3s. The file is ok when played. > > ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 > -y audio.wav > > > Step 3: Combine both files into one video, and the audio sources shall > be mixed: > > ffmpeg -i video.mp4 -i audio.wav -filter_complex > "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 > > The output video has the correct length 6s, but I don't understand why > the 1kHz tone disappears after 4s and the last 2s are silence. > > The console output is below. Can not reproduce using nut container. > Michael > > > > F:\Test_Audio>c:\ffmpeg\ffmpeg -i video.mp4 -i audio.wav -filter_complex > "[0:a][ > 1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 > ffmpeg version git-2020-01-15-0dc0837 Copyright (c) 2000-2020 the FFmpeg > develop > ers >built with gcc 9.2.1 (GCC) 20200111 >configuration: --enable-gpl --enable-version3 --enable-sdl2 > --enable-fontconfi > g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d > --enable-libb > luray --enable-libfreetype --enable-libmp3lame > --enable-libopencore-amrnb --enab > le-libopencore-amrwb --enable-libopenjpeg --enable-libopus > --enable-libshine --e > nable-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 --enab > le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc > --enable-libmysofa --en > able-libspeex --enable-libxvid --enable-libaom --enable-libmfx > --enable-ffnvcode > c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec > --enable-dxva2 - > -enable-avisynth --enable-libopenmpt --enable-amf >libavutil 56. 38.100 / 56. 38.100 >libavcodec 58. 65.103 / 58. 65.103 >libavformat58. 35.102 / 58. 35.102 >libavdevice58. 9.103 / 58. 9.103 >libavfilter 7. 71.100 / 7. 71.100 >libswscale 5. 6.100 / 5. 6.100 >libswresample 3. 6.100 / 3. 6.100 >libpostproc55. 6.100 / 55. 6.100 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4': >Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2avc1mp41 > encoder : Lavf58.35.102 >Duration: 00:00:06.02, start: 0.00, bitrate: 938 kb/s > Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, > 640x480 [ > SAR 1:1 DAR 4:3], 864 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) > Metadata: >handler_name: VideoHandler > Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, > mono, fltp, > 68 kb/s (default) > Metadata: >handler_name: SoundHandler > Guessed Channel Layout for Input Stream #1.0 : mono > Input #1, wav, from 'audio.wav': >Metadata: > encoder : Lavf58.35.102 >Duration: 00:00:10.00, bitrate: 705 kb/s > Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, > mono, s16, > 705 kb/s > Stream mapping: >Stream #0:1 (aac) -> amix:input0 (graph 0) >Stream #1:0 (pcm_s16le) -> amix:input1 (graph 0) >amix (graph 0) -> Stream #0:0 (aac) >Stream #0:0 -> #0:1 (h264 (native) -> h264 (libx264)) > Press [q] to stop, [?] for help > [libx264 @ 029d7540] using SAR=1/1 > [libx264 @ 029d7540] using cpu capabilities: MMX2 SSE2Fast SSSE3 > SSE4.2 > AVX FMA3 BMI2 AVX2 > [libx264 @ 029d7540] profile High, level 3.0, 4:2:0, 8-bit > [libx264 @ 029d7540] 264 - core 159 - H.264/MPEG-4 AVC codec - > Copyleft > 2003-2019 - 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_rang > e=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 > chroma_qp_ > offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 > interla > ced=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 qpma > x=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 > Output #0, mp4, to 'out.mp4': >Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2avc1mp41 > encoder : Lavf58.35.102 > Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, > fltp, 69 k > b/s (default) > Metadata: >encoder : Lavc58.65.103 aac > Stream #0:1(und): Video: h264 (libx264) (avc1 / 0x31637661), > yuv420p,
[FFmpeg-user] Mix a video with an audio file
Hello, I've just found a problem that can be reproduced as follows: Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when played. ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y video.mp4 Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone at t=3s. The file is ok when played. ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 -y audio.wav Step 3: Combine both files into one video, and the audio sources shall be mixed: ffmpeg -i video.mp4 -i audio.wav -filter_complex "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 The output video has the correct length 6s, but I don't understand why the 1kHz tone disappears after 4s and the last 2s are silence. The console output is below. Michael F:\Test_Audio>c:\ffmpeg\ffmpeg -i video.mp4 -i audio.wav -filter_complex "[0:a][ 1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 ffmpeg version git-2020-01-15-0dc0837 Copyright (c) 2000-2020 the FFmpeg develop ers built with gcc 9.2.1 (GCC) 20200111 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfi g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libb luray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enab le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --e nable-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 --enab le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --en able-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcode c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 - -enable-avisynth --enable-libopenmpt --enable-amf libavutil 56. 38.100 / 56. 38.100 libavcodec 58. 65.103 / 58. 65.103 libavformat 58. 35.102 / 58. 35.102 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 71.100 / 7. 71.100 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.35.102 Duration: 00:00:06.02, start: 0.00, bitrate: 938 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x480 [ SAR 1:1 DAR 4:3], 864 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 68 kb/s (default) Metadata: handler_name : SoundHandler Guessed Channel Layout for Input Stream #1.0 : mono Input #1, wav, from 'audio.wav': Metadata: encoder : Lavf58.35.102 Duration: 00:00:10.00, bitrate: 705 kb/s Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s Stream mapping: Stream #0:1 (aac) -> amix:input0 (graph 0) Stream #1:0 (pcm_s16le) -> amix:input1 (graph 0) amix (graph 0) -> Stream #0:0 (aac) Stream #0:0 -> #0:1 (h264 (native) -> h264 (libx264)) Press [q] to stop, [?] for help [libx264 @ 029d7540] using SAR=1/1 [libx264 @ 029d7540] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 029d7540] profile High, level 3.0, 4:2:0, 8-bit [libx264 @ 029d7540] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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_rang e=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_ offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interla ced=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 qpma x=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'out.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.35.102 Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 69 k b/s (default) Metadata: encoder : Lavc58.65.103 aac Stream #0:1(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x48 0 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.65.103 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A frame= 111 fps=0.0 q=28.0 size= 256kB time=00:00:02.36
