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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
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Sur d’autres sites (12655)
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Changing portrait videos to landscape aspect with latest ffmpeg release is breaking
19 décembre 2016, par zealI am having an issue scaling videos recorded in portrait with the latest version of ffmpeg (2.1). This worked fine in a previous version, but I need the lastest version to fix a different issue.
I am trying to take any video passed and make it 852 wide by 480 high. It works fine when converting videos that are wider then tall, but when the video is taller then wide it corrupts the video. It actually adds a letter box to the top and bottom, rather then left and right. Also, the meta data shows it as the correct height & width, but its wrong when played in windows.
Here are the parameters I am using.
ffmpeg -i INPUT -s 852x480 -r 30 -aspect 1.775 -b:v 2000000 -vcodec mpeg4 -vf "scale=iw*min(852/iw\,480 /ih):ih*min(852/iw\,480 /ih),pad=852:480 :(852-iw)/2:(480 -ih)/2" -ac 2 -b:a 128k -ar 44100 -y OUTPUTConsole output from
ffmpeg -i INPUT -r 30 -b:v 2000000 -vcodec mpeg4 -vf "scale=852:480" -ac 2 -b:a 128k -ar 44100 -y OUTPUT:C:\Lib>ffmpeg -i "d\ca96cd13-2995-4794-b753-22be3b918659.mov" -r 30 -b:v 2000000 -vcodec mpeg4 -vf "
scale=852:480" -ac 2 -b:a 128k -ar 44100 -y "d\portx.mp4"
ffmpeg version N-58015-g8cdf4e0 Copyright (c) 2000-2013 the FFmpeg developers
built on Nov 10 2013 18:04:45 with gcc 4.8.2 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32thread
s --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-icon
v --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-
libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr -
-enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --
enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enab
le-libxavs --enable-libxvid --enable-zlib
libavutil 52. 52.100 / 52. 52.100
libavcodec 55. 41.100 / 55. 41.100
libavformat 55. 21.100 / 55. 21.100
libavdevice 55. 5.100 / 55. 5.100
libavfilter 3. 90.102 / 3. 90.102
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd\ca96cd13-2995-4794-b753-22be3b918659.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-11-12 15:02:21
model : iPhone 5
model-eng : iPhone 5
encoder : 7.0.2
encoder-eng : 7.0.2
date : 2013-11-12T10:02:21-0500
date-eng : 2013-11-12T10:02:21-0500
make : Apple
make-eng : Apple
Duration: 00:00:15.48, start: 0.000000, bitrate: 780 kb/s
Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 7
05 kb/s, 29.98 fps, 30 tbr, 600 tbn, 1200 tbc (default)
Metadata:
rotate : 90
creation_time : 2013-11-12 15:02:21
handler_name : Core Media Data Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 62 kb/s (default)
Metadata:
creation_time : 2013-11-12 15:02:21
handler_name : Core Media Data Handler
Output #0, mp4, to 'd\portx.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
make-eng : Apple
model : iPhone 5
model-eng : iPhone 5
make : Apple
encoder-eng : 7.0.2
date : 2013-11-12T10:02:21-0500
date-eng : 2013-11-12T10:02:21-0500
encoder : Lavf55.21.100
Stream #0:0(und): Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 852x480, q=2-31, 2000 kb/s, 15360
tbn, 30 tbc (default)
Metadata:
rotate : 90
creation_time : 2013-11-12 15:02:21
handler_name : Core Media Data Handler
Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128
kb/s (default)
Metadata:
creation_time : 2013-11-12 15:02:21
handler_name : Core Media Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> mpeg4)
Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
Press [q] to stop, [?] for help
frame= 465 fps=417 q=3.8 Lsize= 4118kB time=00:00:15.52 bitrate=2173.3kbits/s
video:3860kB audio:243kB subtitle:0 global headers:0kB muxing overhead 0.348231% -
lavf/dump.c : Print mastering display metadata
1er mars 2016, par Neil Birkbeck -
Why there is no AVFrame->data[2] data when decode h264 by ffmpeg use "h264_cuvid"
27 juillet 2017, par Wu NLenv : ubuntu 16.04 64 bit ; ffmpeg 3.3.2 build whih cuda cuvid libnpp...
use ffmpeg cmd :ffmpeg -vsync 0 -c:v h264_cuvid -i test.264 -f rawvideo test.yuvworks fine, the generated yuv file is ok.
BUT When I decode this 264 file by my code use ’h264_cuvid’ decoder, something problem happens, this is my code :#include
#define __STDC_CONSTANT_MACROS
#ifdef _WIN32
//Windows
extern "C"
{
#include "libavcodec/avcodec.h"
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include <libavcodec></libavcodec>avcodec.h>
#ifdef __cplusplus
};
#endif
#endif
//test different codec
#define TEST_H264 1
#define TEST_HEVC 0
int main(int argc, char* argv[])
{
AVCodec *pCodec;
AVCodecContext *pCodecCtx= NULL;
AVCodecParserContext *pCodecParserCtx=NULL;
FILE *fp_in;
FILE *fp_out;
AVFrame *pFrame;
const int in_buffer_size=4096;
unsigned char in_buffer[in_buffer_size + FF_INPUT_BUFFER_PADDING_SIZE]= {0};
unsigned char *cur_ptr;
int cur_size;
AVPacket packet;
int ret, got_picture;
#if TEST_HEVC
enum AVCodecID codec_id=AV_CODEC_ID_HEVC;
char filepath_in[]="bigbuckbunny_480x272.hevc";
#elif TEST_H264
AVCodecID codec_id=AV_CODEC_ID_H264;
char filepath_in[]="2_60_265to264.264";
#else
AVCodecID codec_id=AV_CODEC_ID_MPEG2VIDEO;
char filepath_in[]="bigbuckbunny_480x272.m2v";
#endif
char filepath_out[]="mainSend.yuv";
int first_time=1;
//av_log_set_level(AV_LOG_DEBUG);
avcodec_register_all();
// pCodec = avcodec_find_decoder(codec_id);
pCodec = avcodec_find_decoder_by_name("h264_cuvid");
if (!pCodec)
{
printf("Codec not found\n");
return -1;
}
pCodecCtx = avcodec_alloc_context3(pCodec);
if (!pCodecCtx)
{
printf("Could not allocate video codec context\n");
return -1;
}
pCodecParserCtx=av_parser_init(pCodec->id);
if (!pCodecParserCtx)
{
printf("Could not allocate video parser context\n");
return -1;
}
if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0)
{
printf("Could not open codec\n");
return -1;
}
//Input File
fp_in = fopen(filepath_in, "rb");
if (!fp_in)
{
printf("Could not open input stream\n");
return -1;
}
//Output File
fp_out = fopen(filepath_out, "wb");
if (!fp_out)
{
printf("Could not open output YUV file\n");
return -1;
}
pFrame = av_frame_alloc();
av_init_packet(&packet);
while (1)
{
cur_size = fread(in_buffer, 1, in_buffer_size, fp_in);
if (cur_size == 0)
break;
cur_ptr=in_buffer;
while (cur_size>0)
{
int len = av_parser_parse2(
pCodecParserCtx, pCodecCtx,
&packet.data, &packet.size,
cur_ptr, cur_size,
AV_NOPTS_VALUE, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
cur_ptr += len;
cur_size -= len;
if(packet.size==0)
continue;
//Some Info from AVCodecParserContext
printf("[Packet]Size:%6d\t",packet.size);
switch(pCodecParserCtx->pict_type)
{
case AV_PICTURE_TYPE_I:
printf("Type:I\tNumber:%4d\n",pCodecParserCtx->output_picture_number);
break;
case AV_PICTURE_TYPE_P:
printf("Type:P\t");
break;
case AV_PICTURE_TYPE_B:
printf("Type:B\t");
break;
default:
printf("Type:Other\t");
break;
}
printf("Number:%4d\n",pCodecParserCtx->output_picture_number);
AVFrame* myFrame = av_frame_alloc();
ret = avcodec_decode_video2(pCodecCtx, myFrame, &got_picture, &packet);
if (ret < 0)
{
printf("Decode Error.\n");
return ret;
}
if (got_picture)
{
if(first_time)
{
printf("\nCodec Full Name:%s\n",pCodecCtx->codec->long_name);
printf("width:%d\nheight:%d\n\n",pCodecCtx->width,pCodecCtx->height);
first_time=0;
}
//Y, U, V
for(int i=0; iheight; i++)
{
fwrite(myFrame->data[0]+myFrag-g>linesize[0]*i,1,myFrame->width,fp_out);
}
for(int i=0; iheight/2; i++)
{
fwrite(myFrame->data[1]+myFrag-g>linesize[1]*i,1,myFrame->width/2,fp_out);
}
for(int i=0; iheight/2; i++)
{
fwrite(myFrame->data[2]+myFrag-g>linesize[2]*i,1,myFrame->width/2,fp_out);
}
// printf("pframe's width height %d %d\t key frame %d\n",myFrame->width,myFrame->height,myFrame->key_frame);
printf("Succeed to decode 1 frame!\n");
av_frame_free(&myFrame);
}
}
}
fclose(fp_in);
fclose(fp_out);
av_parser_close(pCodecParserCtx);
av_frame_free(&pFrame);
avcodec_close(pCodecCtx);
av_free(pCodecCtx);
return 0;
}In this demo code, I call h264_cuvid by
vcodec_find_decoder_by_name("h264_cuvid");
BUT the code crash atfwrite(myFrame->data[2]+myFrag-g>linesize[2]*i,1,myFrame->width/2,fp_out);
So after debug with codeblocks, I found that there is no data in myFrame->data[2] codeblocks watching windowAny suggestion ? thanks !
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