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Sur d’autres sites (13733)
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FFMPEG extracting 1 second resized with copy codec
28 avril 2019, par boblapointeHow can I extract 1 second ( using fast seek ) from a video, resize it, using vp9 ? I always get the same errors. Here are the bare bone commands I’m trying :
ffmpeg -ss 00:00:10 -i test.webm -to 00:00:01 -filter:v "scale=min(iw\,1280):min(ih\,720):force_original_aspect_ratio=decrease" -c:v libvpx-vp9 -y output.webmIt returns :
"Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)After playing around I realize that this will work :
ffmpeg -ss 00:00:10 -i test.webm -to 00:00:01 -c copy -y output.webmNot ideal but at least it works, so I add the filter :
ffmpeg -ss 00:00:10 -i test.webm -to 00:00:01 -filter:v "scale=min(iw\,1280):min(ih\,720):force_original_aspect_ratio=decrease" -c copy -y output.webmAnt then I get :
"Filtering and streamcopy cannot be used together."I’ve tried all kinds of combinations, unsuccessfully. Any hint would be appreciated. Thank you
Here is the full log of the first command :
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) configuration : —prefix=/usr —extra-version=0ubuntu0.18.04.1 —toolchain=hardened —libdir=/usr/lib/x86_64-linux-gnu —incdir=/usr/include/x86_64-linux-gnu —enable-gpl —disable-stripping —enable-avresample —enable-avisynth —enable-gnutls —enable-ladspa —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libcdio —enable-libflite —enable-libfontconfig —enable-libfreetype —enable-libfribidi —enable-libgme —enable-libgsm —enable-libmp3lame —enable-libmysofa —enable-libopenjpeg —enable-libopenmpt —enable-libopus —enable-libpulse —enable-librubberband —enable-librsvg —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libssh —enable-libtheora —enable-libtwolame —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx265 —enable-libxml2 —enable-libxvid —enable-libzmq —enable-libzvbi —enable-omx —enable-openal —enable-opengl —enable-sdl2 —enable-libdc1394 —enable-libdrm —enable-libiec61883 —enable-chromaprint —enable-frei0r —enable-libopencv —enable-libx264 —enable-shared libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 / 57.107.100 libavformat 57. 83.100 / 57. 83.100 libavdevice 57. 10.100 / 57. 10.100 libavfilter 6.107.100 / 6.107.100 libavresample 3. 7. 0 / 3. 7. 0 libswscale 4. 8.100 / 4. 8.100 libswresample 2. 9.100 / 2. 9.100 libpostproc 54. 7.100 / 54. 7.100 Splitting the commandline. Reading option ’-ss’ ... matched as option ’ss’ (set the start time offset) with argument ’00:00:10’. Reading option ’-i’ ... matched as input url with argument ’test.webm’. Reading option ’-to’ ... matched as option ’to’ (record or transcode stop time) with argument ’00:00:01’. Reading option ’-filter:v’ ... matched as option ’filter’ (set stream filtergraph) with argument ’scale=min(iw\,1280):min(ih\,720):force_original_aspect_ratio=decrease’. Reading option ’-c:v’ ... matched as option ’c’ (codec name) with argument ’libvpx-vp9’. Reading option ’-y’ ... matched as option ’y’ (overwrite output files) with argument ’1’. Reading option ’-v’ ... matched as option ’v’ (set logging level) with argument ’debug’. Reading option ’output.webm’ ... matched as output url. Finished splitting the commandline. Parsing a group of options : global . Applying option y (overwrite output files) with argument 1. Applying option v (set logging level) with argument debug. Successfully parsed a group of options. Parsing a group of options : input url test.webm. Applying option ss (set the start time offset) with argument 00:00:10. Successfully parsed a group of options. Opening an input file : test.webm. [NULL @ 0x55ce679f8920] Opening ’test.webm’ for reading [file @ 0x55ce679f9340] Setting default whitelist ’file,crypto’ [matroska,webm @ 0x55ce679f8920] Format matroska,webm probed with size=2048 and score=100 st:0 removing common factor 1000000 from timebase [matroska,webm @ 0x55ce679f8920] Before avformat_find_stream_info() pos : 566 bytes read:32768 seeks:0 nb_streams:1 [matroska,webm @ 0x55ce679f8920] All info found [matroska,webm @ 0x55ce679f8920] After avformat_find_stream_info() pos : 72449 bytes read:72449 seeks:0 frames:1 Input #0, matroska,webm, from ’test.webm’ : Metadata : ENCODER : Lavf57.83.100 Duration : 00:00:15.03, start : 5.016000, bitrate : 1146 kb/s Stream #0:0(eng), 1, 1/1000 : Video : vp9 (Profile 0), 1 reference frame, yuv420p(tv), 1280x720, 0/1, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default) Metadata : DURATION : 00:00:15.025000000 Successfully opened the file. Parsing a group of options : output url output.webm. Applying option to (record or transcode stop time) with argument 00:00:01. Applying option filter:v (set stream filtergraph) with argument scale=min(iw\,1280):min(ih\,720):force_original_aspect_ratio=decrease. Applying option c:v (codec name) with argument libvpx-vp9. Successfully parsed a group of options. Opening an output file : output.webm. [file @ 0x55ce67b1e820] Setting default whitelist ’file,crypto’ Successfully opened the file. detected 8 logical cores Stream mapping : Stream #0:0 -> #0:0 (vp9 (native) -> vp9 (libvpx-vp9)) Press [q] to stop, [?] for help cur_dts is invalid (this is harmless if it occurs once at the start per stream) Last message repeated 1 times [matroska,webm @ 0x55ce679f8920] first_dts 5016 not matching first dts 10395 (pts 10395, duration 41) in the queue cur_dts is invalid (this is harmless if it occurs once at the start per stream) Last message repeated 6 times [Parsed_scale_0 @ 0x55ce67a7c520] Setting ’w’ to value ’min(iw,1280)’ [Parsed_scale_0 @ 0x55ce67a7c520] Setting ’h’ to value ’min(ih,720)’ [Parsed_scale_0 @ 0x55ce67a7c520] Setting ’force_original_aspect_ratio’ to value ’decrease’ [Parsed_scale_0 @ 0x55ce67a7c520] Setting ’flags’ to value ’bicubic’ [Parsed_scale_0 @ 0x55ce67a7c520] w:min(iw,1280) h:min(ih,720) flags :’bicubic’ interl:0 [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] Setting ’video_size’ to value ’1280x720’ [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] Setting ’pix_fmt’ to value ’0’ [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] Setting ’time_base’ to value ’1/1000’ [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] Setting ’pixel_aspect’ to value ’1/1’ [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] Setting ’sws_param’ to value ’flags=2’ [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] Setting ’frame_rate’ to value ’24000/1001’ [graph 0 input from stream 0:0 @ 0x55ce67a7cea0] w:1280 h:720 pixfmt:yuv420p tb:1/1000 fr:24000/1001 sar:1/1 sws_param:flags=2 [format @ 0x55ce67ad7d60] compat : called with args=[yuv420p|yuva420p|yuv422p|yuv440p|yuv444p|gbrp] [format @ 0x55ce67ad7d60] Setting ’pix_fmts’ to value ’yuv420p|yuva420p|yuv422p|yuv440p|yuv444p|gbrp’ [AVFilterGraph @ 0x55ce67aec740] query_formats : 6 queried, 5 merged, 0 already done, 0 delayed [Parsed_scale_0 @ 0x55ce67a7c520] w:1280 h:720 fmt:yuv420p sar:1/1 -> w:1280 h:720 fmt:yuv420p sar:1/1 flags:0x4 [libvpx-vp9 @ 0x55ce67b32200] v1.7.0 [libvpx-vp9 @ 0x55ce67b32200] —prefix=/usr —enable-pic —enable-shared —disable-install-bins —disable-install-srcs —size-limit=16384x16384 —enable-postproc —enable-multi-res-encoding —enable-temporal-denoising —enable-vp9-temporal-denoising —enable-vp9-postproc —target=x86_64-linux-gcc [libvpx-vp9 @ 0x55ce67b32200] vpx_codec_enc_cfg [libvpx-vp9 @ 0x55ce67b32200] generic settings g_usage : 0 g_threads : 8 g_profile : 0 g_w : 320 g_h : 240 g_bit_depth : 8 g_input_bit_depth : 8 g_timebase : 1/30 g_error_resilient : 0 g_pass : 0 g_lag_in_frames : 25 [libvpx-vp9 @ 0x55ce67b32200] rate control settings rc_dropframe_thresh : 0 rc_resize_allowed : 0 rc_resize_up_thresh : 60 rc_resize_down_thresh : 30 rc_end_usage : 0 rc_twopass_stats_in : (nil)(0) rc_target_bitrate : 256 [libvpx-vp9 @ 0x55ce67b32200] quantizer settings rc_min_quantizer : 0 rc_max_quantizer : 63 [libvpx-vp9 @ 0x55ce67b32200] bitrate tolerance rc_undershoot_pct : 25 rc_overshoot_pct : 25 [libvpx-vp9 @ 0x55ce67b32200] decoder buffer model rc_buf_sz : 6000 rc_buf_initial_sz : 4000 rc_buf_optimal_sz : 5000 [libvpx-vp9 @ 0x55ce67b32200] 2 pass rate control settings rc_2pass_vbr_bias_pct : 50 rc_2pass_vbr_minsection_pct : 0 rc_2pass_vbr_maxsection_pct : 2000 [libvpx-vp9 @ 0x55ce67b32200] keyframing settings kf_mode : 1 kf_min_dist : 0 kf_max_dist : 128 [libvpx-vp9 @ 0x55ce67b32200] [libvpx-vp9 @ 0x55ce67b32200] vpx_codec_enc_cfg [libvpx-vp9 @ 0x55ce67b32200] generic settings g_usage : 0 g_threads : 0 g_profile : 0 g_w : 1280 g_h : 720 g_bit_depth : 8 g_input_bit_depth : 8 g_timebase : 1001/24000 g_error_resilient : 0 g_pass : 0 g_lag_in_frames : 25 [libvpx-vp9 @ 0x55ce67b32200] rate control settings rc_dropframe_thresh : 0 rc_resize_allowed : 0 rc_resize_up_thresh : 60 rc_resize_down_thresh : 30 rc_end_usage : 0 rc_twopass_stats_in : (nil)(0) rc_target_bitrate : 200 [libvpx-vp9 @ 0x55ce67b32200] quantizer settings rc_min_quantizer : 0 rc_max_quantizer : 63 [libvpx-vp9 @ 0x55ce67b32200] bitrate tolerance rc_undershoot_pct : 25 rc_overshoot_pct : 25 [libvpx-vp9 @ 0x55ce67b32200] decoder buffer model rc_buf_sz : 6000 rc_buf_initial_sz : 4000 rc_buf_optimal_sz : 5000 [libvpx-vp9 @ 0x55ce67b32200] 2 pass rate control settings rc_2pass_vbr_bias_pct : 50 rc_2pass_vbr_minsection_pct : 0 rc_2pass_vbr_maxsection_pct : 2000 [libvpx-vp9 @ 0x55ce67b32200] keyframing settings kf_mode : 1 kf_min_dist : 0 kf_max_dist : 128 [libvpx-vp9 @ 0x55ce67b32200] [libvpx-vp9 @ 0x55ce67b32200] vpx_codec_control [libvpx-vp9 @ 0x55ce67b32200] VP8E_SET_CPUUSED : 1 [libvpx-vp9 @ 0x55ce67b32200] VP8E_SET_ARNR_MAXFRAMES : 0 [libvpx-vp9 @ 0x55ce67b32200] VP8E_SET_ARNR_STRENGTH : 3 [libvpx-vp9 @ 0x55ce67b32200] VP8E_SET_ARNR_TYPE : 3 [libvpx-vp9 @ 0x55ce67b32200] VP8E_SET_STATIC_THRESHOLD : 0 [libvpx-vp9 @ 0x55ce67b32200] VP9E_SET_COLOR_SPACE : 0 [libvpx-vp9 @ 0x55ce67b32200] VP9E_SET_COLOR_RANGE : 0 [libvpx-vp9 @ 0x55ce67b32200] VP9E_SET_TARGET_LEVEL : 255 [libvpx-vp9 @ 0x55ce67b32200] Using deadline : 1000000 Output #0, webm, to ’output.webm’ : Metadata : encoder : Lavf57.83.100 Stream #0:0(eng), 0, 1/1000 : Video : vp9 (libvpx-vp9), 1 reference frame, yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 0/1, q=-1—1, 200 kb/s, 23.98 fps, 1k tbn, 23.98 tbc (default) Metadata : DURATION : 00:00:15.025000000 encoder : Lavc57.107.100 libvpx-vp9 Side data : cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1 cur_dts is invalid (this is harmless if it occurs once at the start per stream) Last message repeated 120 times [out_0_0 @ 0x55ce67ac35a0] EOF on sink link out_0_0:default. No more output streams to write to, finishing. [webm @ 0x55ce67b2e2a0] get_metadata_duration returned : 15025000 [webm @ 0x55ce67b2e2a0] Write early duration from recording time = 1000 [webm @ 0x55ce67b2e2a0] end duration = 0 [webm @ 0x55ce67b2e2a0] stream 0 end duration = 0 frame= 0 fps=0.0 q=0.0 Lsize= 1kB time=00:00:00.00 bitrate=N/A speed= 0x video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown Input file #0 (test.webm) : Input stream #0:0 (video) : 120 packets read (1031599 bytes) ; 112 frames decoded ; Total : 120 packets (1031599 bytes) demuxed Output file #0 (output.webm) : Output stream #0:0 (video) : 0 frames encoded ; 0 packets muxed (0 bytes) ; Total : 0 packets (0 bytes) muxed Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used) 112 frames successfully decoded, 0 decoding errors [AVIOContext @ 0x55ce67b2e9a0] Statistics : 13 seeks, 9 writeouts [AVIOContext @ 0x55ce67a01660] Statistics : 2137508 bytes read, 4 seeks -
Video not clear when concatinate videos thogther using ffmpeg
5 février 2018, par no nameI have 3 types of the video first is start video played when the video start, the main video which is the main content of the video and last is the end video I want to add them together they have different resolutions so I use a text file to write the videos name like this.
file start.mp4
file main.mp4
file end.mp4then I use this command with FFmpeg
FFmpeg -f concat -i ffmpeg-sound.txt -c copy final_output.mp4the problem is when I start watching the video the first video image is appearing in all the video duration I tried different player every one shows me a crashed photo but the sound is working fine.
also, the main video is created from mp3 file and image with subtitle it’s not original or downloaded from anywhere and I want to concatenate them.
what i tried when i make some searches and i thought it’s the problem that they have different resolution so i tried this command on both 3 videos to make them have the same resolution so no problem show after the concatenateFFmpeg -y -i end.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts end.mp4.tsand try to add the 3 files again with ts formate and the same problem shown too so please any help to solve this
Update
i tried to use this command to change all the three videos to 1280x720FFmpeg -i a.mp4 -vf scale=1280:720 a1.mp4after testing the problem exactly i found that the first video only works then when it go to next video to show it, the screen is a freeze on the last image from the first video. I don’t know why this problem even after i make them same scale !
here is the output offfmpeg -i start.mp4 -i a.mp4 -i end.mp4output this before edit all the videos resulution to 1280x720
ffmpeg version N-89940-gb1af0e23a3 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.2.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-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 --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
libavutil 56. 7.100 / 56. 7.100
libavcodec 58. 9.100 / 58. 9.100
libavformat 58. 7.100 / 58. 7.100
libavdevice 58. 0.101 / 58. 0.101
libavfilter 7. 11.101 / 7. 11.101
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'start.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Tunepro
artist : Kiran Khan
album_artist : Kiran Khan
encoder : Lavf57.83.100
description : This video is about Tunepro
keywords : tunepro,new
Duration: 00:00:03.15, start: 0.000000, bitrate: 863 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 729 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.7.100
Duration: 00:05:21.24, start: 0.000000, bitrate: 188 kb/s
Stream #1:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuvj444p(pc), 300x300 [SAR 1:1 DAR 1:1], 53 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'end.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Tunepro
artist : Kiran Khan
album_artist : Kiran Khan
encoder : Lavf57.83.100
description : This video is about Tunepro
keywords : tunepro,new
Duration: 00:00:30.03, start: 0.000000, bitrate: 8051 kb/s
Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 7923 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #2:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
At least one output file must be specified -
How can I convert audio to WAVE_FORMAT_PCM using FFmpeg ?
16 juin, par Eric StdlibI am using Python's
wavemodule to read audio, and using FFmpeg to convert audio from other types to wav. However, I am encountering some problem.


I wrote
v.pyto generate an silence audio filea.wav


import sys, wave, math
import numpy as np

wave_data = np.zeros(44100).astype(np.short)

f = wave.open('a.wav', 'wb')
f.setnchannels(1)
f.setsampwidth(2)
f.setframerate(96000)
f.writeframes(wave_data.tostring())
f.close()



Then I used FFmpeg to "copy"
a.wavtob.wav(though it seems to encode / decode the file), but I can only reada.wavwith Python ;b.wavcannot be opened.


[user@localhost tmp]$ ffmpeg -i a.wav b.wav
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, wav, from 'a.wav':
 Duration: 00:00:00.46, bitrate: 1536 kb/s
 Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 96000 Hz, mono, s16, 1536 kb/s
Stream mapping:
 Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, wav, to 'b.wav':
 Metadata:
 ISFT : Lavf57.71.100
 Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 96000 Hz, mono, s16, 1536 kb/s
 Metadata:
 encoder : Lavc57.89.100 pcm_s16le
size= 86kB time=00:00:00.45 bitrate=1537.8kbits/s speed= 706x 
video:0kB audio:86kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.115646%
[user@localhost tmp]$ python3
Python 3.6.4 (default, Jan 23 2018, 22:25:37) 
[GCC 7.2.1 20170915 (Red Hat 7.2.1-2)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import wave
>>> wave.open('a.wav')

>>> wave.open('b.wav')
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/lib64/python3.6/wave.py", line 499, in open
 return Wave_read(f)
 File "/usr/lib64/python3.6/wave.py", line 163, in __init__
 self.initfp(f)
 File "/usr/lib64/python3.6/wave.py", line 143, in initfp
 self._read_fmt_chunk(chunk)
 File "/usr/lib64/python3.6/wave.py", line 260, in _read_fmt_chunk
 raise Error('unknown format: %r' % (wFormatTag,))
wave.Error: unknown format: 65534
>>> 
</module></stdin>


How should I change the command of FFmpeg to convert the file to WAVE_FORMAT_PCM, so that I can read
b.wavwith Python ?

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