Re: [FFmpeg-user] Output image sequence duplicate first image
> On 21 Apr 2020, at 09:27, adam smith via ffmpeg-user > wrote: > > > Thanks for the information. I will give it a whirl using the fps filter and > see what happens. > Good news…for me anyway. Carls suggestion appears to be a solution. The new command is... ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -filter_complex "[0:0]fps=fps=20/60[vout]" -map "[vout]" -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg /data/temporary/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg The images created do not have a duplicated first image anymore :) Again thanks for your help it is very much appreciated. Adam ___ 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] Output image sequence duplicate first image
> On 20 Apr 2020, at 23:10, Mark Filipak > wrote: > May I suggest the following workaround? > > Remove the 1st (duplicate) frame with a select filter: > > ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -vf > select='not(eq(n\,0))' -r 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p > -c:v mjpeg > /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg > > Untested. Thanks Mark, I have never used the select filter before, looks interesting; in this use case I think the output images might just duplicate from the next instead (based on nothing to be fair). I will run it and let you know. ___ 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] Output image sequence duplicate first image
> On 20 Apr 2020, at 22:51, Carl Eugen Hoyos wrote: > > Am Mo., 20. Apr. 2020 um 19:32 Uhr schrieb Edward Park > mailto:kumowoon1...@gmail.com>>: >> >>> Use the output option -r or the fps filter to control the frequency of the >>> image grabs. >>> They will show different behaviour wrt the beginning of the grab cycle. Thanks for the information. I will give it a whirl using the fps filter and see what happens. ___ 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] Output image sequence duplicate first image
Hi, Adam, On 04/20/2020 10:28 AM, adam smith via ffmpeg-user wrote: Hi you lovely people, I am trying to output a sequence of jpeg images from a video file. The command does indeed output a sequence of images, but the first and second are always duplicates, while the rest run in sequence until the maximum is reached or the file runs out. I am not sure what I have done wrong. I thought I have asked for -r 10/60 so 10 a minute regardless of frame rate. Any ideas how to stop the duplicate being created? Thanks in advance Here is my full terminal… /usr/src/app # ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -r 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg May I suggest the following workaround? Remove the 1st (duplicate) frame with a select filter: ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -vf select='not(eq(n\,0))' -r 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg Untested. ___ 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] Output image sequence duplicate first image
Am Mo., 20. Apr. 2020 um 19:32 Uhr schrieb Edward Park : > > > Use the output option -r or the fps filter to control the frequency of the > > image grabs. > > They will show different behaviour wrt the beginning of the grab cycle. > > The identical frames at the start is surprising for me, why would that happen > and not be counted as a duplicate? I am also surprised but I wonder if there are not duplicated but the way -r acts can look nondeterministic (it isn't but can act surprisingly). > Does it happen when the frames aren't in the order that they're presented at > the beginning? I don't think this is related. Carl Eugen ___ 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] Output image sequence duplicate first image
Hi, > Use the output option -r or the fps filter to control the frequency of the > image grabs. They will show different behaviour wrt the beginning of the grab > cycle. The identical frames at the start is surprising for me, why would that happen and not be counted as a duplicate? Does it happen when the frames aren't in the order that they're presented at the beginning? Regards, Ted Park ___ 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] Output image sequence duplicate first image
> On 20 Apr 2020, at 15:38, Edward Park wrote: > > If this is accurate, it looks like you have asked it to produce 20 frames in > 60 seconds, or 1/3 fps, or 1 frame every 3 seconds regardless of input > framerate, whatever. It will drop frames, duplicate frames, do what is needed > to keep 1/3 frames per second constant output. You've also specified that you > want 10 frames total. at 1/3 fps that runs 30 seconds. I'm not sure why the > first and second are always duplicates, it doesn't look like any frames were > duplicated. (at 0.33fps if two frames were exactly the same when they weren't > duplicated, maybe it was frozen in the source?) > > Regards, > Ted > Thanks Ted, Thats exactly what I was hoping I had asked it for. Create 20 image files per 60 seconds of source media up to a maximum total of 10 images. So if the source was 15 seconds in duration I would get 5 images, anything 30 seconds if longer in duration I would get 10 images output spaced equally apart in time at a frequency of 1/3 fps from the start of the source. These values are all variables at runtime so I might ask to create at a lower frequency with more or less total images. Every single time I get a duplicate first image :( ___ 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] Output image sequence duplicate first image
> Am 20.04.2020 um 18:16 schrieb adam smith via ffmpeg-user > : > > >> On 20 Apr 2020, at 16:03, Carl Eugen Hoyos wrote: >> Use -vsync 0 and remove -r. > > Thanks for your help Carl. > Adding the -vsync 0 and removing -r did resolve the issue duplicate image > output but did not allow me to specify the frequency of the image grabs. > I will search about for something to allow the frequency to be included. Sorry, I misunderstood: Use the output option -r or the fps filter to control the frequency of the image grabs. They will show different behaviour wrt the beginning of the grab cycle. Carl Eugen ___ 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] Output image sequence duplicate first image
> On 20 Apr 2020, at 16:03, Carl Eugen Hoyos wrote: > Use -vsync 0 and remove -r. Thanks for your help Carl. Adding the -vsync 0 and removing -r did resolve the issue duplicate image output but did not allow me to specify the frequency of the image grabs. I will search about for something to allow the frequency to be included. Thanks ___ 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] Output image sequence duplicate first image
> Am 20.04.2020 um 16:28 schrieb adam smith via ffmpeg-user > : > > Any ideas how to stop the duplicate being created? Use -vsync 0 and remove -r. Carl Eugen ___ 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] Output image sequence duplicate first image
Hi, > /usr/src/app # ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -r > 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg > /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg ... >Stream #0:0: Video: mpeg2video, yuv422p(tv, top first), 1920x1080 [SAR 1:1 > DAR 16:9], 5 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc >Metadata: > file_package_umid: > 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 ... >Stream #0:0: Video: mjpeg, yuvj420p(pc), 283x159 [SAR 848:849 DAR 16:9], > q=2-31, 200 kb/s, 0.33 fps, 0.33 tbn, 0.33 tbc >Metadata: > file_package_umid: > 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 > encoder : Lavc58.54.100 mjpeg >Side data: > cpb: bitrate max/min/avg: 0/0/20 buffer size: 0 vbv_delay: -1 > frame= 10 fps=3.0 q=1.6 Lsize=N/A time=00:00:30.00 bitrate=N/A dup=0 > drop=583 speed= 8.9x > video:51kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing > overhead: unknown If this is accurate, it looks like you have asked it to produce 20 frames in 60 seconds, or 1/3 fps, or 1 frame every 3 seconds regardless of input framerate, whatever. It will drop frames, duplicate frames, do what is needed to keep 1/3 frames per second constant output. You've also specified that you want 10 frames total. at 1/3 fps that runs 30 seconds. I'm not sure why the first and second are always duplicates, it doesn't look like any frames were duplicated. (at 0.33fps if two frames were exactly the same when they weren't duplicated, maybe it was frozen in the source?) Regards, Ted ___ 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] Output image sequence duplicate first image
Hi you lovely people, I am trying to output a sequence of jpeg images from a video file. The command does indeed output a sequence of images, but the first and second are always duplicates, while the rest run in sequence until the maximum is reached or the file runs out. I am not sure what I have done wrong. I thought I have asked for -r 10/60 so 10 a minute regardless of frame rate. Any ideas how to stop the duplicate being created? Thanks in advance Here is my full terminal… /usr/src/app # ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -r 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg ffmpeg version 4.2 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 6.4.0 (Alpine 6.4.0) configuration: --disable-debug --disable-doc --disable-ffplay --enable-shared --enable-avresample --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-gpl --enable-libass --enable-libfreetype --enable-libvidstab --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxvid --enable-libx264 --enable-nonfree --enable-openssl --enable-libfdk_aac --enable-libkvazaar --enable-libaom --extra-libs=-lpthread --enable-postproc --enable-small --enable-version3 --extra-cflags=-I/opt/ffmpeg/include --extra-ldflags=-L/opt/ffmpeg/lib --extra-libs=-ldl --prefix=/opt/ffmpeg libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat58. 29.100 / 58. 29.100 libavdevice58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc55. 5.100 / 55. 5.100 Guessed Channel Layout for Input Stream #0.1 : mono Guessed Channel Layout for Input Stream #0.2 : mono Guessed Channel Layout for Input Stream #0.3 : mono Guessed Channel Layout for Input Stream #0.4 : mono Guessed Channel Layout for Input Stream #0.5 : mono Guessed Channel Layout for Input Stream #0.6 : mono Guessed Channel Layout for Input Stream #0.7 : mono Guessed Channel Layout for Input Stream #0.8 : mono Input #0, mxf, from '/data/vod-storage-dev/source/testfile.mxf': Metadata: operational_pattern_ul: 060e2b34.04010101.0d010201.01010900 uid : adab4424-2f25-4dc7-92ff-29bd000c generation_uid : adab4424-2f25-4dc7-92ff-29bd000c0001 company_name: FFmpeg product_name: OP1a Muxer product_version : 58.12.100 product_uid : adab4424-2f25-4dc7-92ff-29bd000c0002 material_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2400 timecode: 00:00:00:00 Duration: 00:00:38.44, start: 0.00, bitrate: 59978 kb/s Stream #0:0: Video: mpeg2video, yuv422p(tv, top first), 1920x1080 [SAR 1:1 DAR 16:9], 5 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:1: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:2: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:3: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:4: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:5: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:6: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:7: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream #0:8: Audio: pcm_s24le, 48000 Hz, mono, s32 (24 bit), 1152 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001324CF5D529471346A24CF5D00529471346A2401 Stream mapping: Stream #0:0 -> #0:0 (mpeg2video (native) -> mjpeg (native)) Press [q] to stop, [?] for help [swscaler @ 0x5573b7c37180] deprecated pixel format used, make sure you did set range correctly Output #0, image2, to '/data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg': Metadata: operational_pattern_ul: 060e2b34.04010101.0d010201.01010900 uid :
