February 2021 - ffmpeg-user - lists.ffmpeg.org

ffmpeg-lambda-layer and concat protocol
by Maksym Portianoi 25 Feb '21

25 Feb '21

Hi! I am trying to concatenate two .mp3 files using ffmpeg lambda-layer. I have what I think is the correct command, but I struggle to represent it in code so that it is formatted correctly for the lambda layer. Here is a piece of code that I am struggling to get right: spawnSync( '/opt/ffmpeg/ffmpeg', [ '-i', '"concat:/tmp/pt1.mp3|/tmp/pt2.mp3"', '-acodec', 'copy', `/tmp/${fileName}` ], { stdio: 'inherit' } ) The error I'm getting: "concat:/tmp/pt1.mp3|/tmp/pt2.mp3": No such file or directory. I tried to list files in /tmp/ folder - both files listed in the input are there, not sure why lambda layer can't find them. Similar question: https://lists.ffmpeg.org/pipermail/ffmpeg-user/2019-December/046299.html. Ffmpeg concatenate protocol documentation: https://trac.ffmpeg.org/wiki/Concatenate#protocol. Thanks in advance!

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Getting alsa xruns when sending video to v4l2 device and alsa
by Jim Ruxton 24 Feb '21

24 Feb '21

Is there a way that I can avoid getting alsa buffer xruns when using the following command to send a video to a v4l2 device and sound out to alsa. ffmpeg -re -i VideoInput.m4v -map 0:v -pix_fmt yuyv422 -f v4l2 /dev/video0 -f alsa default I tried sending sound to pulse instead as below which avoids xruns but the sound and video are way out of sync. ffmpeg -re -i VideoInput.m4v -map 0:v -pix_fmt yuyv422 -f v4l2 /dev/video0 -f pulse default Thanks, Jim

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BER TOO HIGH
by KRISHNAKUMAR N K 24 Feb '21

24 Feb '21

Hi Guys, I am trying to convert a UDP input to a RTMP live stream, whenever there are any alarm's like (*BER Too High on DVB-S/S2 In Port 3*) on the IRD end, ffmpeg hangs and stop's feed push, it stops printing the log lines as well. Not sure how to handle this issue. At present, I am stopping and starting the conversion for recovery. If someone can help me the context of the issue, that would be great *Complete Logs :* https://pastebin.com/qUagbwK4 *Sample Logs: * [mpeg2video @ 0x4efdd40] MT_DMV in progressive_sequence [mpeg2video @ 0x4efdd40] 00 motion_type at 0 274 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 403 [mpeg2video @ 0x4efdd40] 00 motion_type at 3 287 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 276 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 277 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 278 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 279 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 408 [mpeg2video @ 0x4efdd40] mb incr damaged [mpeg2video @ 0x4efdd40] 00 motion_type at 0 289 [mpeg2video @ 0x4efdd40] MT_DMV in progressive_sequence [mpeg2video @ 0x4efdd40] 00 motion_type at 3 281 [mpeg2video @ 0x4efdd40] 00 motion_type at 0 282 [mpeg2video @ 0x4efdd40] MT_DMV in progressive_sequence [mpeg2video @ 0x4efdd40] Warning MVs not available *ffmpeg Command :* ffmpeg -y -v error -progress tcp://127.0.0.1:39953 -i udp:// 230.1.1.4:10000?fifo_size=10000000&overrun_nonfatal=1 -filter_complex [i:0x1171]yadif[vout];[vout]split=1[out0];[out0]setdar=1280/720[v0];[i:0x1239]aresample=async=1:min_hard_comp=0.100000:first_pts=0[aout];[aout]asplit=1[a0] -f flv -vcodec h264_nvenc -s 1280x720 -r 25/1 -b:v 1500000 -acodec libfdk_aac -ar 48000 -b:a 128000 -gpu 1 -sc_threshold 0 -pix_fmt yuv420p -flags +global_header+cgop -profile:v high -level 3.2 -preset fast -rc:v cbr -maxrate 1500000 -minrate 1500000 -bufsize 3000000 -g 50 -map [v0] -map [a0] rtmp://ipaddress/feed_path Thanks *KrishnaKumar **N K*

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Do I really need libaom?
by Alexander Dyagilev 24 Feb '21

24 Feb '21

Hello, We need to give our users an ability to convert arbitrary video files to MP4. Some of these files uses AV1 codec. I've enabled the use of libdav1d library (which contains decoder only). Do we really need to include libaom too? Is it OK (for a generic user purposes) to convert from AV1 to something else (or maybe it will be just copied without re-encoding) ? We use FFmpeg to convert in the following simple way: ffmpeg -i INPUT_FILE OUTPUT_FILE Example: ffmpeg -i myfile.mkv myfile.mp4 Why don't we want to include libaom? We would like to not increase the size of our distributive as much as possible.

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PTS resolution
by Mark Filipak (ffmpeg) 23 Feb '21

23 Feb '21

Are these correct? ffmpeg PTS resolution is 1ms. DVD & BD PTS resolution is 0.01[1..]ms (i.e. 90x). The PTS difference between 24Hz & 23.976Hz is 0.0416[6..]ms. The PTS difference between 30Hz & 29.970Hz is 0.03[3..]ms. Thanks, Mark. -- In the 1970s, a year at Ohio State Univ = 1 month of minimum wage earnings. In the 2020s, a year at Ohio State Univ = 1+ year of minimum wage earnings. In the 1970s, most jobs were manufacturing, corporate taxes were fair. In the 2020s, most jobs are service, corporate taxes are nearly nonexistent. The U.S. standard of living has plummeted; the wealth gap is now a canyon. In the future, robots will supply the ultimate in slave labor. The coming crisis is here. Beam me up, Scotty!

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set metadata in a jpg image
by Michael Koch 23 Feb '21

23 Feb '21

Hello, I want to set two exif tags in a *.jpg image, so that this image is recognized by Facebook as a spherical 360 image. This can be done with exiftool: exiftool -overwrite_original -make="Ricoh" -model="Ricoh THETA S" test.jpg Is it also possible to do the same thing with FFmpeg? This would simplify things, because the image is anyway created by FFmpeg and perhaps it can all be done in one command line. I did try this command, but the metadata isn't written to the file: ffmpeg -i test.jpg -metadata make="Ricoh" -y test2.jpg The console output is below. Thanks, Michael C:\Users\astro\Desktop\moon>ffmpeg -i test.jpg -metadata make="Ricoh" -y test2.jpg ffmpeg version 2021-02-13-git-d5d6751a55-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. 65.100 / 56. 65.100 libavcodec 58.123.100 / 58.123.100 libavformat 58. 67.100 / 58. 67.100 libavdevice 58. 11.103 / 58. 11.103 libavfilter 7.106.100 / 7.106.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 Input #0, image2, from 'test.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: 103504 kb/s Stream #0:0: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 6000x3000 [SAR 1:1 DAR 2:1], 25 fps, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native)) Press [q] to stop, [?] for help Output #0, image2, to 'test2.jpg': Metadata: make : Ricoh encoder : Lavf58.67.100 Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown, progressive), 6000x3000 [SAR 1:1 DAR 2:1], q=2-31, 200 kb/s, 25 fps, 25 tbn Metadata: encoder : Lavc58.123.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A frame= 1 fps=0.0 q=8.6 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.267x video:505kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

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how to call atadenoise function in ffmpeg
by xsy_xsy 23 Feb '21

23 Feb '21

how to use atadenoise with source code by transplanting it to a video engine. Is there any example to call function "ff_atadenoise_init_x86" in "FFmpeg/libavfilter/atadenoise.h"

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AV Sync issue Live Stream
by KRISHNAKUMAR N K 23 Feb '21

23 Feb '21

Hi I am doing a rtmp push of a live stream from a MIP/UDP input. The feed push works fine even for a few weeks, but suddenly I could see AV sync issues. I need to stop and start the feed each and every time, for the feed to work again. I see only the following log lines. Can someone give me a way to handle this? *[mp2 @ 0x393da00] Header missingError while decoding stream #0:1: Invalid data found when processing input[mp2 @ 0x393da00] Header missingError while decoding stream #0:1: Invalid data found when processing* input *FFmpeg Command:* *ffmpeg -y -v error -progress tcp://127.0.0.1:34853 <http://127.0.0.1:34853> -i udp://230.1.1.3:10000?fifo_size=10000000&overrun_nonfatal=1 <http://230.1.1.3:10000?fifo_size=10000000&overrun_nonfatal=1> -filter_complex [i:0xd0]yadif[vout];[vout]split=1[out0];[out0]setdar=640/360[v0];[i:0x134]aresample=async=1:min_hard_comp=0.100000:first_pts=0[aout];[aout]asplit=1[a0] -f flv -vcodec libx264 -s 640x360 -r 25/1 -b:v 350000 -acodec libfdk_aac -ar 48000 -b:a 64000 -sc_threshold 0 -pix_fmt yuv420p -flags +global_header+cgop -profile:v baseline -level 3.0 -preset fast -nal-hrd cbr -maxrate 350000 -minrate 350000 -bufsize 700000 -g 50 -map [v0] -map [a0] rtmp://server/feed_path* Regards *KrishnaKumar **N K * *Mobile:* +91 9894024256

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Screen cast audio is not in sync
by Kai Hendry 22 Feb '21

22 Feb '21

Hi there, How do I prevent my audio going out of sync with my screen capture please? https://s.natalian.org/2021-02-22/update-chart.log https://s.natalian.org/2021-02-22/update-chart.mp4 Perhaps it's an issue with my USB microphone? https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/1143 🤷 Many thanks,

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shuffleframes -- unexpected results
by Mark Filipak (ffmpeg) 22 Feb '21

22 Feb '21

I've run some test cases for the shuffleframes filter. I've documented shuffleframes via my preferred documentation format (below). In the course of my testing, I found 2 cases (marked "***** Expected", below) that produced unexpected results, to wit: If the 1st frame is discarded, the entire input is discarded, even if the 1st discard is followed by frames that are supposed to be retained. shuffleframes ...General frame manipulation that substitutes and/or discards video frames but that does not insert (cannot add) frames [1]. shuffleframes=0 ...Default ¦ 0 ...Passes the input frames to the output, unaltered (does nothing). ...For a pattern of frames with initial substitution: 0 0 ...For input frames 0 1 2 3 4 5 etc., outputs 0 0 2 2 4 4 etc. 0 0 2 ...For input frames 0 1 2 3 4 5 6 7 8 etc., outputs 0 0 2 3 3 5 6 6 8 etc. 0 0 2 3 ...For input frames 0 1 2 3 4 5 6 7 8 9 10 11 etc., outputs 0 0 2 3 4 4 6 7 8 8 10 11 etc. ...For a pattern of frames with final substitution: 0 0 ...For input frames 0 1 2 3 4 5 etc., outputs 0 0 2 2 4 4 etc. 0 1 1 ...For input frames 0 1 2 3 4 5 6 7 8 etc., outputs 0 1 1 3 4 4 6 7 7 etc. 0 1 2 2 ...For input frames 0 1 2 3 4 5 6 7 8 9 10 11 etc., outputs 0 1 2 2 4 5 6 6 8 9 10 10 etc. ...For a pattern of frames with internal substitution: 0 1 1 3 ...For input frames 0 1 2 3 4 5 6 7 8 9 10 11 etc., outputs 0 1 1 3 4 5 5 7 8 9 9 11 etc. ...For a pattern of frames with initial discard: -1 ...Blocks the pipeline (discards all frames). -1 1 ...Blocks the pipeline (discards all frames). ***** Expected 1 3 5 7 .. -1 1 2 ...Blocks the pipeline (discards all frames). ***** Expected 1 2 4 5 7 8 .. ...For a pattern of frames with final discard: 0 -1 ...For input frames 0 1 2 3 4 5 etc., outputs 0 2 4 etc. 0 1 -1 ...For input frames 0 1 2 3 4 5 6 7 8 etc., outputs 0 1 3 4 6 7 etc. 0 1 2 -1 ...For input frames 0 1 2 3 4 5 6 7 8 9 10 11 etc., outputs 0 1 2 4 5 6 8 9 10 etc. ...For a pattern of frames with internal discard: 0 1 -1 3 ...For input frames 0 1 2 3 4 5 6 7 8 9 10 11 etc., outputs 0 1 3 4 5 7 8 9 11 etc. ...For a pattern of frames with 2 substitutions (exchange) and 1 internal discard: 0 3 -1 1 ...For input frames 0 1 2 3 4 5 6 7 8 9 10 11 etc., outputs 0 3 1 4 7 5 8 11 9 etc. [1] A scheme utilizing '+' to insert frames (similar to how '-' discards frames) was not implemented. -- Facts: The U.S. President heads the military, federal police, and National Guard; The President can unconditionally declare martial law at any time, for any reason; The House impeached President Trump but it only takes 34 senators to block removal; Lacking Senate action, only Vice President Pence could have stopped Trump; On 6 January, Trump denounced Pence for 'allowing' Biden's election; Vowing Pence's murder, Oath Keepers & Proud Boys attacked the Capital; Trump did nothing to stop the insurrection and sent no help. Trump? The Republicans? Connect the dots, folks. It's not rocket science.

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