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ffmpeg.c
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ffmpeg.c
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/*
*
* ffmpeg.c
*
* This software is distributed under the GNU Public License version 2
* See also the file 'COPYING'.
*
* The contents of this file has been derived from output_example.c
* and apiexample.c from the FFmpeg distribution.
*
* This file has been modified so that only major versions greater than
* 53 are supported.
* Note that while the conditions are based upon LIBAVFORMAT, not all of the changes are
* specific to libavformat.h. Some changes could be related to other components of ffmpeg.
* This is for simplicity. The avformat version has historically changed at the same time
* as the other components so it is easier to have a single version number to track rather
* than the particular version numbers which are associated with each component.
* The libav variant also has different apis with the same major/minor version numbers.
* As such, it is occasionally necessary to look at the microversion number. Numbers
* greater than 100 for micro version indicate ffmpeg whereas numbers less than 100
* indicate libav
*/
#include "translate.h"
#include "motion.h"
#ifdef HAVE_FFMPEG
/****************************************************************************
* The section below is the "my" section of functions.
* These are designed to be extremely simple version specific
* variants of the libav functions.
****************************************************************************/
#if (LIBAVFORMAT_VERSION_MAJOR >= 55) || ((LIBAVFORMAT_VERSION_MAJOR == 54) && (LIBAVFORMAT_VERSION_MINOR > 6))
#define MY_FLAG_READ AVIO_FLAG_READ
#define MY_FLAG_WRITE AVIO_FLAG_WRITE
#define MY_FLAG_READ_WRITE AVIO_FLAG_READ_WRITE
#else //Older versions
#define MY_FLAG_READ URL_RDONLY
#define MY_FLAG_WRITE URL_WRONLY
#define MY_FLAG_READ_WRITE URL_RDWR
#endif
/*********************************************/
#if (LIBAVFORMAT_VERSION_MAJOR >= 56)
#define MY_CODEC_ID_MSMPEG4V2 AV_CODEC_ID_MSMPEG4V2
#define MY_CODEC_ID_FLV1 AV_CODEC_ID_FLV1
#define MY_CODEC_ID_FFV1 AV_CODEC_ID_FFV1
#define MY_CODEC_ID_NONE AV_CODEC_ID_NONE
#define MY_CODEC_ID_MPEG2VIDEO AV_CODEC_ID_MPEG2VIDEO
#define MY_CODEC_ID_H264 AV_CODEC_ID_H264
#define MY_CODEC_ID_HEVC AV_CODEC_ID_HEVC
#else
#define MY_CODEC_ID_MSMPEG4V2 CODEC_ID_MSMPEG4V2
#define MY_CODEC_ID_FLV1 CODEC_ID_FLV1
#define MY_CODEC_ID_FFV1 CODEC_ID_FFV1
#define MY_CODEC_ID_NONE CODEC_ID_NONE
#define MY_CODEC_ID_MPEG2VIDEO CODEC_ID_MPEG2VIDEO
#define MY_CODEC_ID_H264 CODEC_ID_H264
#define MY_CODEC_ID_HEVC CODEC_ID_H264
#endif
/*********************************************/
#if (LIBAVCODEC_VERSION_MAJOR >= 57)
#define MY_CODEC_FLAG_GLOBAL_HEADER AV_CODEC_FLAG_GLOBAL_HEADER
#define MY_CODEC_FLAG_QSCALE AV_CODEC_FLAG_QSCALE
#else
#define MY_CODEC_FLAG_GLOBAL_HEADER CODEC_FLAG_GLOBAL_HEADER
#define MY_CODEC_FLAG_QSCALE CODEC_FLAG_QSCALE
#endif
/*********************************************/
AVFrame *my_frame_alloc(void){
AVFrame *pic;
#if (LIBAVFORMAT_VERSION_MAJOR >= 55)
pic = av_frame_alloc();
#else
pic = avcodec_alloc_frame();
#endif
return pic;
}
/*********************************************/
void my_frame_free(AVFrame *frame){
#if (LIBAVFORMAT_VERSION_MAJOR >= 55)
av_frame_free(&frame);
#else
av_freep(&frame);
#endif
}
/*********************************************/
int my_image_get_buffer_size(enum MyPixelFormat pix_fmt, int width, int height){
int retcd = 0;
#if (LIBAVFORMAT_VERSION_MAJOR >= 57)
int align = 1;
retcd = av_image_get_buffer_size(pix_fmt, width, height, align);
#else
retcd = avpicture_get_size(pix_fmt, width, height);
#endif
return retcd;
}
/*********************************************/
int my_image_copy_to_buffer(AVFrame *frame, uint8_t *buffer_ptr, enum MyPixelFormat pix_fmt,int width, int height,int dest_size){
int retcd = 0;
#if (LIBAVFORMAT_VERSION_MAJOR >= 57)
int align = 1;
retcd = av_image_copy_to_buffer((uint8_t *)buffer_ptr,dest_size
,(const uint8_t * const*)frame,frame->linesize,pix_fmt,width,height,align);
#else
retcd = avpicture_layout((const AVPicture*)frame,pix_fmt,width,height
,(unsigned char *)buffer_ptr,dest_size);
#endif
return retcd;
}
/*********************************************/
int my_image_fill_arrays(AVFrame *frame,uint8_t *buffer_ptr,enum MyPixelFormat pix_fmt,int width,int height){
int retcd = 0;
#if (LIBAVFORMAT_VERSION_MAJOR >= 57)
int align = 1;
retcd = av_image_fill_arrays(
frame->data
,frame->linesize
,buffer_ptr
,pix_fmt
,width
,height
,align
);
#else
retcd = avpicture_fill(
(AVPicture *)frame
,buffer_ptr
,pix_fmt
,width
,height);
#endif
return retcd;
}
/*********************************************/
void my_packet_unref(AVPacket pkt){
#if (LIBAVFORMAT_VERSION_MAJOR >= 57)
av_packet_unref(&pkt);
#else
av_free_packet(&pkt);
#endif
}
/*********************************************/
void my_avcodec_close(AVCodecContext *codec_context){
#if (LIBAVFORMAT_VERSION_MAJOR >= 58) || ((LIBAVFORMAT_VERSION_MAJOR == 57) && (LIBAVFORMAT_VERSION_MINOR >= 41))
avcodec_free_context(&codec_context);
#else
avcodec_close(codec_context);
#endif
}
/*********************************************/
int my_copy_packet(AVPacket *dest_pkt, AVPacket *src_pkt){
#if (LIBAVFORMAT_VERSION_MAJOR >= 55)
return av_packet_ref(dest_pkt, src_pkt);
#else
/* Old versions of libav do not support copying packet
* We therefore disable the pass through recording and
* for this function, simply do not do anything
*/
if (dest_pkt == src_pkt ){
return 0;
} else {
return 0;
}
#endif
}
/*********************************************/
/****************************************************************************
****************************************************************************
****************************************************************************/
/*********************************************/
static void ffmpeg_free_nal(struct ffmpeg *ffmpeg){
if (ffmpeg->nal_info) {
free(ffmpeg->nal_info);
ffmpeg->nal_info = NULL;
ffmpeg->nal_info_len = 0;
}
}
static int ffmpeg_encode_nal(struct ffmpeg *ffmpeg){
// h264_v4l2m2m has NAL units separated from the first frame, which makes
// some players very unhappy.
if ((ffmpeg->pkt.pts == 0) && (!(ffmpeg->pkt.flags & AV_PKT_FLAG_KEY))) {
ffmpeg_free_nal(ffmpeg);
ffmpeg->nal_info_len = ffmpeg->pkt.size;
ffmpeg->nal_info = malloc(ffmpeg->nal_info_len);
if (ffmpeg->nal_info) {
memcpy(ffmpeg->nal_info, &ffmpeg->pkt.data[0], ffmpeg->nal_info_len);
return 1;
} else
ffmpeg->nal_info_len = 0;
} else if (ffmpeg->nal_info) {
int old_size = ffmpeg->pkt.size;
av_grow_packet(&ffmpeg->pkt, ffmpeg->nal_info_len);
memmove(&ffmpeg->pkt.data[ffmpeg->nal_info_len], &ffmpeg->pkt.data[0], old_size);
memcpy(&ffmpeg->pkt.data[0], ffmpeg->nal_info, ffmpeg->nal_info_len);
ffmpeg_free_nal(ffmpeg);
}
return 0;
}
static int ffmpeg_timelapse_exists(const char *fname){
FILE *file;
file = fopen(fname, "r");
if (file)
{
fclose(file);
return 1;
}
return 0;
}
static int ffmpeg_timelapse_append(struct ffmpeg *ffmpeg, AVPacket pkt){
FILE *file;
file = fopen(ffmpeg->filename, "a");
if (!file) return -1;
fwrite(pkt.data,1,pkt.size,file);
fclose(file);
return 0;
}
#if (LIBAVFORMAT_VERSION_MAJOR < 58)
/* TODO Determine if this is even needed for old versions. Per
* documentation for version 58, 'av_lockmgr_register This function does nothing'
*/
static int ffmpeg_lockmgr_cb(void **arg, enum AVLockOp op){
pthread_mutex_t *mutex = *arg;
int err;
switch (op) {
case AV_LOCK_CREATE:
mutex = malloc(sizeof(*mutex));
if (!mutex)
return AVERROR(ENOMEM);
if ((err = pthread_mutex_init(mutex, NULL))) {
free(mutex);
return AVERROR(err);
}
*arg = mutex;
return 0;
case AV_LOCK_OBTAIN:
if ((err = pthread_mutex_lock(mutex)))
return AVERROR(err);
return 0;
case AV_LOCK_RELEASE:
if ((err = pthread_mutex_unlock(mutex)))
return AVERROR(err);
return 0;
case AV_LOCK_DESTROY:
if (mutex)
pthread_mutex_destroy(mutex);
free(mutex);
*arg = NULL;
return 0;
}
return 1;
}
#endif
static void ffmpeg_free_context(struct ffmpeg *ffmpeg){
if (ffmpeg->picture != NULL){
my_frame_free(ffmpeg->picture);
ffmpeg->picture = NULL;
}
if (ffmpeg->ctx_codec != NULL){
my_avcodec_close(ffmpeg->ctx_codec);
ffmpeg->ctx_codec = NULL;
}
if (ffmpeg->oc != NULL){
avformat_free_context(ffmpeg->oc);
ffmpeg->oc = NULL;
}
}
static int ffmpeg_get_oformat(struct ffmpeg *ffmpeg){
size_t codec_name_len = strcspn(ffmpeg->codec_name, ":");
char *codec_name = malloc(codec_name_len + 1);
char basename[PATH_MAX];
int retcd;
/* TODO: Rework the extenstion asssignment along with the code in event.c
* If extension is ever something other than three bytes,
* preceded by . then lots of things will fail
*/
if (codec_name == NULL) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Failed to allocate memory for codec name"));
ffmpeg_free_context(ffmpeg);
return -1;
}
memcpy(codec_name, ffmpeg->codec_name, codec_name_len);
codec_name[codec_name_len] = 0;
/* Only the newer codec and containers can handle the really fast FPS */
if (((strcmp(codec_name, "msmpeg4") == 0) ||
(strcmp(codec_name, "mpeg4") == 0) ||
(strcmp(codec_name, "swf") == 0) ) && (ffmpeg->fps >50)){
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("The frame rate specified is too high for the ffmpeg movie type specified. "
"Choose a different ffmpeg container or lower framerate."));
ffmpeg_free_context(ffmpeg);
free(codec_name);
return -1;
}
retcd = snprintf(basename,PATH_MAX,"%s",ffmpeg->filename);
if ((retcd < 0) || (retcd >= PATH_MAX)){
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Error setting base file name"));
ffmpeg_free_context(ffmpeg);
free(codec_name);
return -1;
}
if (ffmpeg->tlapse == TIMELAPSE_APPEND){
ffmpeg->oc->oformat = av_guess_format ("mpeg2video", NULL, NULL);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_MPEG2VIDEO;
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.mpg",basename);
if ((!ffmpeg->oc->oformat) ||
(retcd < 0) || (retcd >= PATH_MAX)){
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Error setting timelapse append for codec %s"), codec_name);
ffmpeg_free_context(ffmpeg);
free(codec_name);
return -1;
}
free(codec_name);
return 0;
}
if (strcmp(codec_name, "mpeg4") == 0) {
ffmpeg->oc->oformat = av_guess_format("avi", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.avi",basename);
}
if (strcmp(codec_name, "msmpeg4") == 0) {
ffmpeg->oc->oformat = av_guess_format("avi", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.avi",basename);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_MSMPEG4V2;
}
if (strcmp(codec_name, "swf") == 0) {
ffmpeg->oc->oformat = av_guess_format("swf", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.swf",basename);
}
if (strcmp(codec_name, "flv") == 0) {
ffmpeg->oc->oformat = av_guess_format("flv", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.flv",basename);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_FLV1;
}
if (strcmp(codec_name, "ffv1") == 0) {
ffmpeg->oc->oformat = av_guess_format("avi", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.avi",basename);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_FFV1;
}
if (strcmp(codec_name, "mov") == 0) {
ffmpeg->oc->oformat = av_guess_format("mov", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.mov",basename);
}
if (strcmp(codec_name, "mp4") == 0) {
ffmpeg->oc->oformat = av_guess_format("mp4", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.mp4",basename);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_H264;
}
if (strcmp(codec_name, "mkv") == 0) {
ffmpeg->oc->oformat = av_guess_format("matroska", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.mkv",basename);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_H264;
}
if (strcmp(codec_name, "hevc") == 0) {
ffmpeg->oc->oformat = av_guess_format("mp4", NULL, NULL);
retcd = snprintf(ffmpeg->filename,PATH_MAX,"%s.mp4",basename);
if (ffmpeg->oc->oformat) ffmpeg->oc->oformat->video_codec = MY_CODEC_ID_HEVC;
}
//Check for valid results
if ((retcd < 0) || (retcd >= PATH_MAX)){
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Error setting file name"));
ffmpeg_free_context(ffmpeg);
free(codec_name);
return -1;
}
if (!ffmpeg->oc->oformat) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("codec option value %s is not supported"), codec_name);
ffmpeg_free_context(ffmpeg);
free(codec_name);
return -1;
}
if (ffmpeg->oc->oformat->video_codec == MY_CODEC_ID_NONE) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Could not get the codec"));
ffmpeg_free_context(ffmpeg);
free(codec_name);
return -1;
}
free(codec_name);
return 0;
}
static int ffmpeg_encode_video(struct ffmpeg *ffmpeg){
#if (LIBAVFORMAT_VERSION_MAJOR >= 58) || ((LIBAVFORMAT_VERSION_MAJOR == 57) && (LIBAVFORMAT_VERSION_MINOR >= 41))
//ffmpeg version 3.1 and after
int retcd = 0;
char errstr[128];
retcd = avcodec_send_frame(ffmpeg->ctx_codec, ffmpeg->picture);
if (retcd < 0 ){
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Error sending frame for encoding:%s"),errstr);
return -1;
}
retcd = avcodec_receive_packet(ffmpeg->ctx_codec, &ffmpeg->pkt);
if (retcd == AVERROR(EAGAIN)){
//Buffered packet. Throw special return code
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(DBG, TYPE_ENCODER, NO_ERRNO
,_("Receive packet threw EAGAIN returning -2 code :%s"),errstr);
my_packet_unref(ffmpeg->pkt);
return -2;
}
if (retcd < 0 ){
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Error receiving encoded packet video:%s"),errstr);
//Packet is freed upon failure of encoding
return -1;
}
if (ffmpeg->preferred_codec == USER_CODEC_V4L2M2M){
if (ffmpeg_encode_nal(ffmpeg)) {
// Throw special return code
return -2;
}
}
return 0;
#elif (LIBAVFORMAT_VERSION_MAJOR >= 55) || ((LIBAVFORMAT_VERSION_MAJOR == 54) && (LIBAVFORMAT_VERSION_MINOR > 6))
int retcd = 0;
char errstr[128];
int got_packet_ptr;
retcd = avcodec_encode_video2(ffmpeg->ctx_codec, &ffmpeg->pkt, ffmpeg->picture, &got_packet_ptr);
if (retcd < 0 ){
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Error encoding video:%s"),errstr);
//Packet is freed upon failure of encoding
return -1;
}
if (got_packet_ptr == 0){
//Buffered packet. Throw special return code
my_packet_unref(ffmpeg->pkt);
return -2;
}
/* This kills compiler warnings. Nal setting is only for recent ffmpeg versions*/
if (ffmpeg->preferred_codec == USER_CODEC_V4L2M2M){
if (ffmpeg_encode_nal(ffmpeg)) {
// Throw special return code
return -2;
}
}
return 0;
#else
int retcd = 0;
uint8_t *video_outbuf;
int video_outbuf_size;
video_outbuf_size = (ffmpeg->ctx_codec->width +16) * (ffmpeg->ctx_codec->height +16) * 1;
video_outbuf = mymalloc(video_outbuf_size);
retcd = avcodec_encode_video(ffmpeg->video_st->codec, video_outbuf, video_outbuf_size, ffmpeg->picture);
if (retcd < 0 ){
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Error encoding video"));
my_packet_unref(ffmpeg->pkt);
return -1;
}
if (retcd == 0 ){
// No bytes encoded => buffered=>special handling
my_packet_unref(ffmpeg->pkt);
return -2;
}
// Encoder did not provide metadata, set it up manually
ffmpeg->pkt.size = retcd;
ffmpeg->pkt.data = video_outbuf;
if (ffmpeg->picture->key_frame == 1)
ffmpeg->pkt.flags |= AV_PKT_FLAG_KEY;
ffmpeg->pkt.pts = ffmpeg->picture->pts;
ffmpeg->pkt.dts = ffmpeg->pkt.pts;
free(video_outbuf);
/* This kills compiler warnings. Nal setting is only for recent ffmpeg versions*/
if (ffmpeg->preferred_codec == USER_CODEC_V4L2M2M){
if (ffmpeg_encode_nal(ffmpeg)) {
// Throw special return code
return -2;
}
}
return 0;
#endif
}
static int ffmpeg_set_pts(struct ffmpeg *ffmpeg, const struct timeval *tv1){
int64_t pts_interval;
if (ffmpeg->tlapse != TIMELAPSE_NONE) {
ffmpeg->last_pts++;
ffmpeg->picture->pts = ffmpeg->last_pts;
} else {
pts_interval = ((1000000L * (tv1->tv_sec - ffmpeg->start_time.tv_sec)) + tv1->tv_usec - ffmpeg->start_time.tv_usec);
if (pts_interval < 0){
/* This can occur when we have pre-capture frames. Reset start time of video. */
ffmpeg_reset_movie_start_time(ffmpeg, tv1);
pts_interval = 0;
}
if (ffmpeg->last_pts < 0) {
// This is the very first frame, ensure PTS is zero
ffmpeg->picture->pts = 0;
} else
ffmpeg->picture->pts = av_rescale_q(pts_interval,(AVRational){1, 1000000L},ffmpeg->video_st->time_base) + ffmpeg->base_pts;
if (ffmpeg->test_mode == TRUE){
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO
,_("PTS %"PRId64" Base PTS %"PRId64" ms interval %"PRId64" timebase %d-%d")
,ffmpeg->picture->pts,ffmpeg->base_pts,pts_interval
,ffmpeg->video_st->time_base.num,ffmpeg->video_st->time_base.den);
}
if (ffmpeg->picture->pts <= ffmpeg->last_pts){
//We have a problem with our motion loop timing and sending frames or the rounding into the PTS.
if (ffmpeg->test_mode == TRUE){
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO, _("BAD TIMING!! Frame skipped."));
}
return -1;
}
ffmpeg->last_pts = ffmpeg->picture->pts;
}
return 0;
}
static int ffmpeg_set_pktpts(struct ffmpeg *ffmpeg, const struct timeval *tv1){
int64_t pts_interval;
if (ffmpeg->tlapse != TIMELAPSE_NONE) {
ffmpeg->last_pts++;
ffmpeg->pkt.pts = ffmpeg->last_pts;
} else {
pts_interval = ((1000000L * (tv1->tv_sec - ffmpeg->start_time.tv_sec)) + tv1->tv_usec - ffmpeg->start_time.tv_usec);
if (pts_interval < 0){
/* This can occur when we have pre-capture frames. Reset start time of video. */
ffmpeg_reset_movie_start_time(ffmpeg, tv1);
pts_interval = 0;
}
ffmpeg->pkt.pts = av_rescale_q(pts_interval,(AVRational){1, 1000000L},ffmpeg->video_st->time_base) + ffmpeg->base_pts;
if (ffmpeg->test_mode == TRUE){
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO
,_("PTS %"PRId64" Base PTS %"PRId64" ms interval %"PRId64" timebase %d-%d Change %d")
,ffmpeg->pkt.pts
,ffmpeg->base_pts,pts_interval
,ffmpeg->video_st->time_base.num
,ffmpeg->video_st->time_base.den
,(ffmpeg->pkt.pts-ffmpeg->last_pts) );
}
if (ffmpeg->pkt.pts <= ffmpeg->last_pts){
//We have a problem with our motion loop timing and sending frames or the rounding into the PTS.
if (ffmpeg->test_mode == TRUE){
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO, _("BAD TIMING!! Frame skipped."));
}
return -1;
}
ffmpeg->last_pts = ffmpeg->pkt.pts;
ffmpeg->pkt.dts=ffmpeg->pkt.pts;
}
return 0;
}
static int ffmpeg_set_quality(struct ffmpeg *ffmpeg){
ffmpeg->opts = 0;
if (ffmpeg->quality > 100) ffmpeg->quality = 100;
if (ffmpeg->ctx_codec->codec_id == MY_CODEC_ID_H264 ||
ffmpeg->ctx_codec->codec_id == MY_CODEC_ID_HEVC){
if (ffmpeg->quality <= 0)
ffmpeg->quality = 45; // default to 45% quality
av_dict_set(&ffmpeg->opts, "preset", "ultrafast", 0);
av_dict_set(&ffmpeg->opts, "tune", "zerolatency", 0);
/* This next if statement needs validation. Are mpeg4omx
* and v4l2m2m even MY_CODEC_ID_H264 or MY_CODEC_ID_HEVC
* such that it even would be possible to be part of this
* if block to start with? */
if ((ffmpeg->preferred_codec == USER_CODEC_H264OMX) ||
(ffmpeg->preferred_codec == USER_CODEC_MPEG4OMX) ||
(ffmpeg->preferred_codec == USER_CODEC_V4L2M2M)) {
// bit_rate = ffmpeg->width * ffmpeg->height * ffmpeg->fps * quality_factor
ffmpeg->quality = (int)(((int64_t)ffmpeg->width * ffmpeg->height * ffmpeg->fps * ffmpeg->quality) >> 7);
// Clip bit rate to min
if (ffmpeg->quality < 4000) // magic number
ffmpeg->quality = 4000;
ffmpeg->ctx_codec->profile = FF_PROFILE_H264_HIGH;
ffmpeg->ctx_codec->bit_rate = ffmpeg->quality;
} else {
// Control other H264 encoders quality via CRF
char crf[10];
ffmpeg->quality = (int)(( (100-ffmpeg->quality) * 51)/100);
snprintf(crf, 10, "%d", ffmpeg->quality);
av_dict_set(&ffmpeg->opts, "crf", crf, 0);
}
} else {
/* The selection of 8000 is a subjective number based upon viewing output files */
if (ffmpeg->quality > 0){
ffmpeg->quality =(int)(((100-ffmpeg->quality)*(100-ffmpeg->quality)*(100-ffmpeg->quality) * 8000) / 1000000) + 1;
ffmpeg->ctx_codec->flags |= MY_CODEC_FLAG_QSCALE;
ffmpeg->ctx_codec->global_quality=ffmpeg->quality;
}
}
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO
,_("%s codec vbr/crf/bit_rate: %d"), ffmpeg->codec->name, ffmpeg->quality);
return 0;
}
struct blacklist_t
{
const char *codec_name;
const char *reason;
};
static const char *ffmpeg_codec_is_blacklisted(const char *codec_name){
static struct blacklist_t blacklisted_codec[] =
{
#if (LIBAVFORMAT_VERSION_MAJOR < 58) || ( (LIBAVFORMAT_VERSION_MAJOR == 58) && ( (LIBAVFORMAT_VERSION_MINOR < 29) || ((LIBAVFORMAT_VERSION_MINOR == 29) && (LIBAVFORMAT_VERSION_MICRO <= 100)) ) )
/* h264_omx & ffmpeg combination locks up on Raspberry Pi.
* Newer versions of ffmpeg allow zerocopy to be disabled to workaround
* this issue.
* To use h264_omx encoder on older versions of ffmpeg:
* - disable input_zerocopy in ffmpeg omx.c:omx_encode_init function.
* - remove the "h264_omx" from this blacklist.
* More information: https://github.com/Motion-Project/motion/issues/433
*/
{"h264_omx", "Codec causes lock up on your FFMpeg version"},
#endif
#if (LIBAVFORMAT_VERSION_MAJOR < 57) || ((LIBAVFORMAT_VERSION_MAJOR == 57) && (LIBAVFORMAT_VERSION_MINOR < 41))
{"h264_v4l2m2m", "FFMpeg version is too old"},
#endif
};
size_t i;
for (i = 0; i < sizeof(blacklisted_codec)/sizeof(blacklisted_codec[0]); i++) {
if (strcmp(codec_name, blacklisted_codec[i].codec_name) == 0)
return blacklisted_codec[i].reason;
}
return NULL;
}
static int ffmpeg_set_codec_preferred(struct ffmpeg *ffmpeg){
size_t codec_name_len = strcspn(ffmpeg->codec_name, ":");
ffmpeg->codec = NULL;
if (ffmpeg->codec_name[codec_name_len]) {
const char *blacklist_reason = ffmpeg_codec_is_blacklisted(&ffmpeg->codec_name[codec_name_len+1]);
if (blacklist_reason) {
MOTION_LOG(WRN, TYPE_ENCODER, NO_ERRNO
,_("Preferred codec %s has been blacklisted: %s")
,&ffmpeg->codec_name[codec_name_len+1], blacklist_reason);
} else {
ffmpeg->codec = avcodec_find_encoder_by_name(&ffmpeg->codec_name[codec_name_len+1]);
if ((ffmpeg->oc->oformat) && (ffmpeg->codec != NULL)) {
ffmpeg->oc->oformat->video_codec = ffmpeg->codec->id;
} else if (ffmpeg->codec == NULL) {
MOTION_LOG(WRN, TYPE_ENCODER, NO_ERRNO
,_("Preferred codec %s not found")
,&ffmpeg->codec_name[codec_name_len+1]);
}
}
}
if (!ffmpeg->codec)
ffmpeg->codec = avcodec_find_encoder(ffmpeg->oc->oformat->video_codec);
if (!ffmpeg->codec) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Codec %s not found"), ffmpeg->codec_name);
ffmpeg_free_context(ffmpeg);
return -1;
}
if (strcmp(ffmpeg->codec->name, "h264_v4l2m2m") == 0){
ffmpeg->preferred_codec = USER_CODEC_V4L2M2M;
} else if (strcmp(ffmpeg->codec->name, "h264_omx") == 0){
ffmpeg->preferred_codec = USER_CODEC_H264OMX;
} else if (strcmp(ffmpeg->codec->name, "mpeg4_omx") == 0){
ffmpeg->preferred_codec = USER_CODEC_MPEG4OMX;
} else {
ffmpeg->preferred_codec = USER_CODEC_DEFAULT;
}
if (ffmpeg->codec_name[codec_name_len])
MOTION_LOG(NTC, TYPE_ENCODER, NO_ERRNO,_("Using codec %s"), ffmpeg->codec->name);
return 0;
}
static int ffmpeg_set_codec(struct ffmpeg *ffmpeg){
int retcd;
char errstr[128];
int chkrate;
retcd = ffmpeg_set_codec_preferred(ffmpeg);
if (retcd != 0) return retcd;
#if (LIBAVFORMAT_VERSION_MAJOR >= 58) || ((LIBAVFORMAT_VERSION_MAJOR == 57) && (LIBAVFORMAT_VERSION_MINOR >= 41))
//If we provide the codec to this, it results in a memory leak. ffmpeg ticket: 5714
ffmpeg->video_st = avformat_new_stream(ffmpeg->oc, NULL);
if (!ffmpeg->video_st) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Could not alloc stream"));
ffmpeg_free_context(ffmpeg);
return -1;
}
ffmpeg->ctx_codec = avcodec_alloc_context3(ffmpeg->codec);
if (ffmpeg->ctx_codec == NULL) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Failed to allocate decoder!"));
ffmpeg_free_context(ffmpeg);
return -1;
}
#else
ffmpeg->video_st = avformat_new_stream(ffmpeg->oc, ffmpeg->codec);
if (!ffmpeg->video_st) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Could not alloc stream"));
ffmpeg_free_context(ffmpeg);
return -1;
}
ffmpeg->ctx_codec = ffmpeg->video_st->codec;
#endif
if (ffmpeg->tlapse != TIMELAPSE_NONE) {
ffmpeg->ctx_codec->gop_size = 1;
} else {
if (ffmpeg->fps <= 5){
ffmpeg->ctx_codec->gop_size = 1;
} else if (ffmpeg->fps > 30){
ffmpeg->ctx_codec->gop_size = 15;
} else {
ffmpeg->ctx_codec->gop_size = (ffmpeg->fps / 2);
}
ffmpeg->gop_cnt = ffmpeg->ctx_codec->gop_size - 1;
}
/* For certain containers, setting the fps to very low numbers results in
** a very poor quality playback. We can set the FPS to a higher number and
** then let the PTS display the frames correctly.
*/
if ((ffmpeg->tlapse == TIMELAPSE_NONE) && (ffmpeg->fps <= 5)){
if ((strcmp(ffmpeg->codec_name, "msmpeg4") == 0) ||
(strcmp(ffmpeg->codec_name, "flv") == 0) ||
(strcmp(ffmpeg->codec_name, "mov") == 0) ||
(strcmp(ffmpeg->codec_name, "mp4") == 0) ||
(strcmp(ffmpeg->codec_name, "hevc") == 0) ||
(strcmp(ffmpeg->codec_name, "mpeg4") == 0)) {
MOTION_LOG(NTC, TYPE_ENCODER, NO_ERRNO, "Low fps. Encoding %d frames into a %d frames container.", ffmpeg->fps, 10);
ffmpeg->fps = 10;
}
}
ffmpeg->ctx_codec->codec_id = ffmpeg->oc->oformat->video_codec;
ffmpeg->ctx_codec->codec_type = AVMEDIA_TYPE_VIDEO;
ffmpeg->ctx_codec->bit_rate = ffmpeg->bps;
ffmpeg->ctx_codec->width = ffmpeg->width;
ffmpeg->ctx_codec->height = ffmpeg->height;
ffmpeg->ctx_codec->time_base.num = 1;
ffmpeg->ctx_codec->time_base.den = ffmpeg->fps;
if (ffmpeg->preferred_codec == USER_CODEC_V4L2M2M){
ffmpeg->ctx_codec->pix_fmt = AV_PIX_FMT_NV21;
} else {
ffmpeg->ctx_codec->pix_fmt = MY_PIX_FMT_YUV420P;
}
ffmpeg->ctx_codec->max_b_frames = 0;
if (strcmp(ffmpeg->codec_name, "ffv1") == 0){
ffmpeg->ctx_codec->strict_std_compliance = -2;
ffmpeg->ctx_codec->level = 3;
}
ffmpeg->ctx_codec->flags |= MY_CODEC_FLAG_GLOBAL_HEADER;
if ((strcmp(ffmpeg->codec->name, "h264_omx") == 0) ||
(strcmp(ffmpeg->codec->name, "mpeg4_omx") == 0)) {
/* h264_omx & ffmpeg combination locks up on Raspberry Pi.
* To use h264_omx encoder, we need to disable zerocopy.
* More information: https://github.com/Motion-Project/motion/issues/433
*/
av_dict_set(&ffmpeg->opts, "zerocopy", "0", 0);
}
retcd = ffmpeg_set_quality(ffmpeg);
if (retcd < 0){
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Unable to set quality"));
return -1;
}
retcd = avcodec_open2(ffmpeg->ctx_codec, ffmpeg->codec, &ffmpeg->opts);
if (retcd < 0) {
if (ffmpeg->codec->supported_framerates) {
const AVRational *fps = ffmpeg->codec->supported_framerates;
while (fps->num) {
MOTION_LOG(INF, TYPE_ENCODER, NO_ERRNO
,_("Reported FPS Supported %d/%d"), fps->num, fps->den);
fps++;
}
}
chkrate = 1;
while ((chkrate < 36) && (retcd != 0)) {
ffmpeg->ctx_codec->time_base.den = chkrate;
retcd = avcodec_open2(ffmpeg->ctx_codec, ffmpeg->codec, &ffmpeg->opts);
chkrate++;
}
if (retcd < 0){
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("Could not open codec %s"),errstr);
av_dict_free(&ffmpeg->opts);
ffmpeg_free_context(ffmpeg);
return -1;
}
}
av_dict_free(&ffmpeg->opts);
return 0;
}
static int ffmpeg_set_stream(struct ffmpeg *ffmpeg){
#if (LIBAVFORMAT_VERSION_MAJOR >= 58) || ((LIBAVFORMAT_VERSION_MAJOR == 57) && (LIBAVFORMAT_VERSION_MINOR >= 41))
int retcd;
char errstr[128];
retcd = avcodec_parameters_from_context(ffmpeg->video_st->codecpar,ffmpeg->ctx_codec);
if (retcd < 0) {
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO
,_("Failed to copy decoder parameters!: %s"), errstr);
ffmpeg_free_context(ffmpeg);
return -1;
}
#endif
ffmpeg->video_st->time_base = (AVRational){1, ffmpeg->fps};
return 0;
}
/*Special allocation of video buffer for v4l2m2m codec*/
static int ffmpeg_alloc_video_buffer(AVFrame *frame, int align)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
int ret, i, padded_height;
int plane_padding = FFMAX(16 + 16/*STRIDE_ALIGN*/, align);
if (!desc)
return AVERROR(EINVAL);
if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
return ret;
if (!frame->linesize[0]) {
if (align <= 0)
align = 32; /* STRIDE_ALIGN. Should be av_cpu_max_align() */
for(i=1; i<=align; i+=i) {
ret = av_image_fill_linesizes(frame->linesize, frame->format,
FFALIGN(frame->width, i));
if (ret < 0)
return ret;
if (!(frame->linesize[0] & (align-1)))
break;
}
for (i = 0; i < 4 && frame->linesize[i]; i++)
frame->linesize[i] = FFALIGN(frame->linesize[i], align);
}
padded_height = FFALIGN(frame->height, 32);
if ((ret = av_image_fill_pointers(frame->data, frame->format, padded_height,
NULL, frame->linesize)) < 0)
return ret;
frame->buf[0] = av_buffer_alloc(ret + 4*plane_padding);
if (!frame->buf[0]) {
ret = AVERROR(ENOMEM);
av_frame_unref(frame);
return ret;
}
frame->buf[1] = av_buffer_alloc(ret + 4*plane_padding);
if (!frame->buf[1]) {
ret = AVERROR(ENOMEM);
av_frame_unref(frame);
return ret;
}
frame->data[0] = frame->buf[0]->data;
frame->data[1] = frame->buf[1]->data;
frame->data[2] = frame->data[1] + ((frame->width * padded_height) / 4);
frame->extended_data = frame->data;
return 0;
}
static int ffmpeg_set_picture(struct ffmpeg *ffmpeg){
int retcd;
char errstr[128];
ffmpeg->picture = my_frame_alloc();
if (!ffmpeg->picture) {
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("could not alloc frame"));
ffmpeg_free_context(ffmpeg);
return -1;
}
/* Take care of variable bitrate setting. */
if (ffmpeg->quality)
ffmpeg->picture->quality = ffmpeg->quality;
ffmpeg->picture->linesize[0] = ffmpeg->ctx_codec->width;
ffmpeg->picture->linesize[1] = ffmpeg->ctx_codec->width / 2;
ffmpeg->picture->linesize[2] = ffmpeg->ctx_codec->width / 2;
ffmpeg->picture->format = ffmpeg->ctx_codec->pix_fmt;
ffmpeg->picture->width = ffmpeg->ctx_codec->width;
ffmpeg->picture->height = ffmpeg->ctx_codec->height;
if (ffmpeg->preferred_codec == USER_CODEC_V4L2M2M) {
retcd = ffmpeg_alloc_video_buffer(ffmpeg->picture, 32);
if (retcd) {
av_strerror(retcd, errstr, sizeof(errstr));
MOTION_LOG(ERR, TYPE_ENCODER, NO_ERRNO, _("could not alloc buffers %s"), errstr);
ffmpeg_free_context(ffmpeg);
return -1;
}
}
return 0;
}