move p*m from image/lavf -> image2/lavc

video/audio_codec_id in AVFormatParameters to override/help demuxer
av_guess_codec() to guess the default codecs based upon muxer + filename

Originally committed as revision 3668 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -255,6 +255,9 @@ static int nb_frames_dup = 0;
 static int nb_frames_drop = 0;
 static int input_sync;
 
+static int pgmyuv_compatibility_hack=0;
+
+
 #define DEFAULT_PASS_LOGFILENAME "ffmpeg2pass"
 
 typedef struct AVOutputStream {
@@ -2015,8 +2018,9 @@ static void opt_format(const char *arg)
 {
     /* compatibility stuff for pgmyuv */
     if (!strcmp(arg, "pgmyuv")) {
+        pgmyuv_compatibility_hack=1;
         opt_image_format(arg);
-        arg = "image";
+        arg = "image2";
     }
 
     file_iformat = av_find_input_format(arg);
@@ -2782,6 +2786,10 @@ static void opt_input_file(const char *filename)
     ap->device  = grab_device;
     ap->channel = video_channel;
     ap->standard = video_standard;
+    ap->video_codec_id = video_codec_id;
+    ap->audio_codec_id = audio_codec_id;
+    if(pgmyuv_compatibility_hack)
+        ap->video_codec_id= CODEC_ID_PGMYUV;
 
     /* open the input file with generic libav function */
     err = av_open_input_file(&ic, filename, file_iformat, 0, ap);
@@ -3004,7 +3012,7 @@ static void opt_output_file(const char *filename)
                 int i;
                 AVCodec *codec;
             
-                codec_id = file_oformat->video_codec;
+                codec_id = av_guess_codec(file_oformat, NULL, filename, NULL, CODEC_TYPE_VIDEO);
                 if (video_codec_id != CODEC_ID_NONE)
                     codec_id = video_codec_id;
                 
@@ -3253,7 +3261,7 @@ static void opt_output_file(const char *filename)
                 st->stream_copy = 1;
 		audio_enc->channels = audio_channels;
             } else {
-                codec_id = file_oformat->audio_codec;
+                codec_id = av_guess_codec(file_oformat, NULL, filename, NULL, CODEC_TYPE_AUDIO);
                 if (audio_codec_id != CODEC_ID_NONE)
                     codec_id = audio_codec_id;
                 audio_enc->codec_id = codec_id;

libavcodec/Makefile

@@ -21,7 +21,7 @@ OBJS= common.o utils.o mem.o allcodecs.o \
       msvideo1.o vqavideo.o idcinvideo.o adx.o rational.o faandct.o 8bps.o \
       smc.o parser.o flicvideo.o truemotion1.o vmdav.o lcl.o qtrle.o g726.o \
       flac.o vp3dsp.o integer.o snow.o tscc.o sonic.o ulti.o h264idct.o \
-      qdrw.o xl.o rangecoder.o png.o
+      qdrw.o xl.o rangecoder.o png.o pnm.o
 
 ifeq ($(AMR_NB),yes)
 ifeq ($(AMR_NB_FIXED),yes)

libavcodec/allcodecs.c

@@ -77,6 +77,11 @@ void avcodec_register_all(void)
 #ifdef CONFIG_ZLIB
     register_avcodec(&png_encoder);
 #endif
+    register_avcodec(&ppm_encoder);
+    register_avcodec(&pgm_encoder);
+    register_avcodec(&pgmyuv_encoder);
+    register_avcodec(&pbm_encoder);
+    register_avcodec(&pam_encoder);
     register_avcodec(&huffyuv_encoder);
     register_avcodec(&asv1_encoder);
     register_avcodec(&asv2_encoder);

libavcodec/avcodec.h

@@ -154,6 +154,11 @@ enum CodecID {
     CODEC_ID_XVID,
 
     CODEC_ID_PNG,    
+    CODEC_ID_PPM,
+    CODEC_ID_PBM,
+    CODEC_ID_PGM,
+    CODEC_ID_PGMYUV,
+    CODEC_ID_PAM,
 };
 
 /* CODEC_ID_MP3LAME is absolete */
@@ -1798,6 +1803,11 @@ extern AVCodec dvvideo_encoder;
 extern AVCodec mjpeg_encoder;
 extern AVCodec ljpeg_encoder;
 extern AVCodec png_encoder;
+extern AVCodec ppm_encoder;
+extern AVCodec pgm_encoder;
+extern AVCodec pgmyuv_encoder;
+extern AVCodec pbm_encoder;
+extern AVCodec pam_encoder;
 extern AVCodec mpeg4_encoder;
 extern AVCodec msmpeg4v1_encoder;
 extern AVCodec msmpeg4v2_encoder;

libavcodec/pnm.c

+/*
+ * PNM image format
+ * Copyright (c) 2002, 2003 Fabrice Bellard.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "avcodec.h"
+
+typedef struct PNMContext {
+    uint8_t *bytestream;
+    uint8_t *bytestream_start;
+    uint8_t *bytestream_end;
+    AVFrame picture;
+} PNMContext;
+
+static inline int pnm_space(int c)  
+{
+    return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
+}
+
+static void pnm_get(PNMContext *sc, char *str, int buf_size) 
+{
+    char *s;
+    int c;
+    
+    /* skip spaces and comments */
+    for(;;) {
+        c = *sc->bytestream++;
+        if (c == '#')  {
+            do  {
+                c = *sc->bytestream++;
+            } while (c != '\n' && sc->bytestream < sc->bytestream_end);
+        } else if (!pnm_space(c)) {
+            break;
+        }
+    }
+    
+    s = str;
+    while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
+        if ((s - str)  < buf_size - 1)
+            *s++ = c;
+        c = *sc->bytestream++;
+    }
+    *s = '\0';
+}
+
+static int common_init(AVCodecContext *avctx){
+    PNMContext *s = avctx->priv_data;
+
+    avcodec_get_frame_defaults((AVFrame*)&s->picture);
+    avctx->coded_frame= (AVFrame*)&s->picture;
+
+    return 0;
+}
+
+static int pnm_decode_frame(AVCodecContext *avctx, 
+                        void *data, int *data_size,
+                        uint8_t *buf, int buf_size)
+{
+    PNMContext * const s = avctx->priv_data;
+    AVFrame *picture = data;
+    AVFrame * const p= (AVFrame*)&s->picture;
+    int i, n, linesize, h;
+    char buf1[32];
+    unsigned char *ptr;
+
+    /* special case for last picture */
+    if (buf_size == 0) {
+        return 0;
+    }
+    
+    s->bytestream_start=
+    s->bytestream= buf;
+    s->bytestream_end= buf + buf_size;
+
+    pnm_get(s, buf1, sizeof(buf1));
+    if (!strcmp(buf1, "P4")) {
+        avctx->pix_fmt = PIX_FMT_MONOWHITE;
+    } else if (!strcmp(buf1, "P5")) {
+        if (avctx->codec_id == CODEC_ID_PGMYUV) 
+            avctx->pix_fmt = PIX_FMT_YUV420P;
+        else
+            avctx->pix_fmt = PIX_FMT_GRAY8;
+    } else if (!strcmp(buf1, "P6")) {
+        avctx->pix_fmt = PIX_FMT_RGB24;
+    } else {
+        return -1;
+    }
+    pnm_get(s, buf1, sizeof(buf1));
+    avctx->width = atoi(buf1);
+    if (avctx->width <= 0)
+        return -1;
+    pnm_get(s, buf1, sizeof(buf1));
+    avctx->height = atoi(buf1);
+    if (avctx->height <= 0)
+        return -1;
+    if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
+        pnm_get(s, buf1, sizeof(buf1));
+    }
+
+    /* more check if YUV420 */
+    if (avctx->pix_fmt == PIX_FMT_YUV420P) {
+        if ((avctx->width & 1) != 0)
+            return -1;
+        h = (avctx->height * 2);
+        if ((h % 3) != 0)
+            return -1;
+        h /= 3;
+        avctx->height = h;
+    }
+    
+    if(p->data[0])
+        avctx->release_buffer(avctx, p);
+
+    p->reference= 0;
+    if(avctx->get_buffer(avctx, p) < 0){
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return -1;
+    }
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+    
+    switch(avctx->pix_fmt) {
+    default:
+        return -1;
+    case PIX_FMT_RGB24:
+        n = avctx->width * 3;
+        goto do_read;
+    case PIX_FMT_GRAY8:
+        n = avctx->width;
+        goto do_read;
+    case PIX_FMT_MONOWHITE:
+        n = (avctx->width + 7) >> 3;
+    do_read:
+        ptr = p->data[0];
+        linesize = p->linesize[0];
+        for(i = 0; i < avctx->height; i++) {
+            memcpy(ptr, s->bytestream, n);
+            s->bytestream += n;
+            ptr += linesize;
+        }
+        break;
+    case PIX_FMT_YUV420P:
+        {
+            unsigned char *ptr1, *ptr2;
+
+            n = avctx->width;
+            ptr = p->data[0];
+            linesize = p->linesize[0];
+            for(i = 0; i < avctx->height; i++) {
+                memcpy(ptr, s->bytestream, n);
+                s->bytestream += n;
+                ptr += linesize;
+            }
+            ptr1 = p->data[1];
+            ptr2 = p->data[2];
+            n >>= 1;
+            h = avctx->height >> 1;
+            for(i = 0; i < h; i++) {
+                memcpy(ptr1, s->bytestream, n);
+                s->bytestream += n;
+                memcpy(ptr2, s->bytestream, n);
+                s->bytestream += n;
+                ptr1 += p->linesize[1];
+                ptr2 += p->linesize[2];
+            }
+        }
+        break;
+    }
+    *picture= *(AVFrame*)&s->picture;
+    *data_size = sizeof(AVPicture);
+
+    return s->bytestream - s->bytestream_start;
+}
+
+static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
+    PNMContext *s = avctx->priv_data;
+    AVFrame *pict = data;
+    AVFrame * const p= (AVFrame*)&s->picture;
+    int i, h, h1, c, n, linesize;
+    uint8_t *ptr, *ptr1, *ptr2;
+
+    *p = *pict;
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+    
+    s->bytestream_start=
+    s->bytestream= outbuf;
+    s->bytestream_end= outbuf+buf_size;
+
+    h = avctx->height;
+    h1 = h;
+    switch(avctx->pix_fmt) {
+    case PIX_FMT_MONOWHITE:
+        c = '4';
+        n = (avctx->width + 7) >> 3;
+        break;
+    case PIX_FMT_GRAY8:
+        c = '5';
+        n = avctx->width;
+        break;
+    case PIX_FMT_RGB24:
+        c = '6';
+        n = avctx->width * 3;
+        break;
+    case PIX_FMT_YUV420P:
+        c = '5';
+        n = avctx->width;
+        h1 = (h * 3) / 2;
+        break;
+    default:
+        return -1;
+    }
+    snprintf(s->bytestream, s->bytestream_end - s->bytestream, 
+             "P%c\n%d %d\n",
+             c, avctx->width, h1);
+    s->bytestream += strlen(s->bytestream);
+    if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
+        snprintf(s->bytestream, s->bytestream_end - s->bytestream, 
+                 "%d\n", 255);
+        s->bytestream += strlen(s->bytestream);
+    }
+
+    ptr = p->data[0];
+    linesize = p->linesize[0];
+    for(i=0;i<h;i++) {
+        memcpy(s->bytestream, ptr, n);
+        s->bytestream += n;
+        ptr += linesize;
+    }
+    
+    if (avctx->pix_fmt == PIX_FMT_YUV420P) {
+        h >>= 1;
+        n >>= 1;
+        ptr1 = p->data[1];
+        ptr2 = p->data[2];
+        for(i=0;i<h;i++) {
+            memcpy(s->bytestream, ptr1, n);
+            s->bytestream += n;
+            memcpy(s->bytestream, ptr2, n);
+            s->bytestream += n;
+                ptr1 += p->linesize[1];
+                ptr2 += p->linesize[2];
+        }
+    }
+    return s->bytestream - s->bytestream_start;
+}
+
+static int pam_decode_frame(AVCodecContext *avctx, 
+                        void *data, int *data_size,
+                        uint8_t *buf, int buf_size)
+{
+    PNMContext * const s = avctx->priv_data;
+    AVFrame *picture = data;
+    AVFrame * const p= (AVFrame*)&s->picture;
+    int i, n, linesize, h, w, depth, maxval;
+    char buf1[32], tuple_type[32];
+    unsigned char *ptr;
+
+    /* special case for last picture */
+    if (buf_size == 0) {
+        return 0;
+    }
+    
+    s->bytestream_start=
+    s->bytestream= buf;
+    s->bytestream_end= buf + buf_size;
+
+    pnm_get(s, buf1, sizeof(buf1));
+    if (strcmp(buf1, "P7") != 0)
+        return -1;
+    w = -1;
+    h = -1;
+    maxval = -1;
+    depth = -1;
+    tuple_type[0] = '\0';
+    for(;;) {
+        pnm_get(s, buf1, sizeof(buf1));
+        if (!strcmp(buf1, "WIDTH")) {
+            pnm_get(s, buf1, sizeof(buf1));
+            w = strtol(buf1, NULL, 10);
+        } else if (!strcmp(buf1, "HEIGHT")) {
+            pnm_get(s, buf1, sizeof(buf1));
+            h = strtol(buf1, NULL, 10);
+        } else if (!strcmp(buf1, "DEPTH")) {
+            pnm_get(s, buf1, sizeof(buf1));
+            depth = strtol(buf1, NULL, 10);
+        } else if (!strcmp(buf1, "MAXVAL")) {
+            pnm_get(s, buf1, sizeof(buf1));
+            maxval = strtol(buf1, NULL, 10);
+        } else if (!strcmp(buf1, "TUPLETYPE")) {
+            pnm_get(s, tuple_type, sizeof(tuple_type));
+        } else if (!strcmp(buf1, "ENDHDR")) {
+            break;
+        } else {
+            return -1;
+        }
+    }
+    /* check that all tags are present */
+    if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0')
+        return -1;
+    avctx->width = w;
+    avctx->height = h;
+    if (depth == 1) {
+        if (maxval == 1)
+            avctx->pix_fmt = PIX_FMT_MONOWHITE;
+        else 
+            avctx->pix_fmt = PIX_FMT_GRAY8;
+    } else if (depth == 3) {
+        avctx->pix_fmt = PIX_FMT_RGB24;
+    } else if (depth == 4) {
+        avctx->pix_fmt = PIX_FMT_RGBA32;
+    } else {
+        return -1;
+    }
+    
+    if(p->data[0])
+        avctx->release_buffer(avctx, p);
+
+    p->reference= 0;
+    if(avctx->get_buffer(avctx, p) < 0){
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return -1;
+    }
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+    
+    switch(avctx->pix_fmt) {
+    default:
+        return -1;
+    case PIX_FMT_RGB24:
+        n = avctx->width * 3;
+        goto do_read;
+    case PIX_FMT_GRAY8:
+        n = avctx->width;
+        goto do_read;
+    case PIX_FMT_MONOWHITE:
+        n = (avctx->width + 7) >> 3;
+    do_read:
+        ptr = p->data[0];
+        linesize = p->linesize[0];
+        for(i = 0; i < avctx->height; i++) {
+            memcpy(ptr, s->bytestream, n);
+            s->bytestream += n;
+            ptr += linesize;
+        }
+        break;
+    case PIX_FMT_RGBA32:
+        ptr = p->data[0];
+        linesize = p->linesize[0];
+        for(i = 0; i < avctx->height; i++) {
+            int j, r, g, b, a;
+
+            for(j = 0;j < w; j++) {
+                r = *s->bytestream++;
+                g = *s->bytestream++;
+                b = *s->bytestream++;
+                a = *s->bytestream++;
+                ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
+            }
+            ptr += linesize;
+        }
+        break;
+    }   
+    *picture= *(AVFrame*)&s->picture;
+    *data_size = sizeof(AVPicture);
+
+    return s->bytestream - s->bytestream_start;
+}
+
+static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
+    PNMContext *s = avctx->priv_data;
+    AVFrame *pict = data;
+    AVFrame * const p= (AVFrame*)&s->picture;
+    int i, h, w, n, linesize, depth, maxval;
+    const char *tuple_type;
+    uint8_t *ptr;
+
+    *p = *pict;
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+    
+    s->bytestream_start=
+    s->bytestream= outbuf;
+    s->bytestream_end= outbuf+buf_size;
+
+    h = avctx->height;
+    w = avctx->width;
+    switch(avctx->pix_fmt) {
+    case PIX_FMT_MONOWHITE:
+        n = (w + 7) >> 3;
+        depth = 1;
+        maxval = 1;
+        tuple_type = "BLACKANDWHITE";
+        break;
+    case PIX_FMT_GRAY8:
+        n = w;
+        depth = 1;
+        maxval = 255;
+        tuple_type = "GRAYSCALE";
+        break;
+    case PIX_FMT_RGB24:
+        n = w * 3;
+        depth = 3;
+        maxval = 255;
+        tuple_type = "RGB";
+        break;
+    case PIX_FMT_RGBA32:
+        n = w * 4;
+        depth = 4;
+        maxval = 255;
+        tuple_type = "RGB_ALPHA";
+        break;
+    default:
+        return -1;
+    }
+    snprintf(s->bytestream, s->bytestream_end - s->bytestream, 
+             "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
+             w, h, depth, maxval, tuple_type);
+    s->bytestream += strlen(s->bytestream);
+    
+    ptr = p->data[0];
+    linesize = p->linesize[0];
+    
+    if (avctx->pix_fmt == PIX_FMT_RGBA32) {
+        int j;
+        unsigned int v;
+
+        for(i=0;i<h;i++) {
+            for(j=0;j<w;j++) {
+                v = ((uint32_t *)ptr)[j];
+                *s->bytestream++ = v >> 16;
+                *s->bytestream++ = v >> 8;
+                *s->bytestream++ = v;
+                *s->bytestream++ = v >> 24;
+            }
+            ptr += linesize;
+        }
+    } else {
+        for(i=0;i<h;i++) {
+            memcpy(s->bytestream, ptr, n);
+            s->bytestream += n;
+            ptr += linesize;
+        }
+    }
+    return s->bytestream - s->bytestream_start;
+}
+
+#if 0
+static int pnm_probe(AVProbeData *pd)
+{
+    const char *p = pd->buf;
+    if (pd->buf_size >= 8 &&
+        p[0] == 'P' &&
+        p[1] >= '4' && p[1] <= '6' &&
+        pnm_space(p[2]) )
+        return AVPROBE_SCORE_MAX - 1; /* to permit pgmyuv probe */
+    else
+        return 0;
+}
+
+static int pgmyuv_probe(AVProbeData *pd)
+{
+    if (match_ext(pd->filename, "pgmyuv"))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int pam_probe(AVProbeData *pd)
+{
+    const char *p = pd->buf;
+    if (pd->buf_size >= 8 &&
+        p[0] == 'P' &&
+        p[1] == '7' &&
+        p[2] == '\n')
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+#endif
+
+AVCodec pgm_encoder = {
+    "pgm",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_PGM,
+    sizeof(PNMContext),
+    common_init,
+    pnm_encode_frame,
+    NULL, //encode_end,
+    pnm_decode_frame,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, -1}, 
+};
+
+AVCodec pgmyuv_encoder = {
+    "pgmyuv",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_PGMYUV,
+    sizeof(PNMContext),
+    common_init,
+    pnm_encode_frame,
+    NULL, //encode_end,
+    pnm_decode_frame,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1}, 
+};
+
+AVCodec ppm_encoder = {
+    "ppm",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_PPM,
+    sizeof(PNMContext),
+    common_init,
+    pnm_encode_frame,
+    NULL, //encode_end,
+    pnm_decode_frame,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, -1}, 
+};
+
+AVCodec pbm_encoder = {
+    "pbm",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_PBM,
+    sizeof(PNMContext),
+    common_init,
+    pnm_encode_frame,
+    NULL, //encode_end,
+    pnm_decode_frame,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, -1}, 
+};
+
+AVCodec pam_encoder = {
+    "pam",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_PAM,
+    sizeof(PNMContext),
+    common_init,
+    pam_encode_frame,
+    NULL, //encode_end,
+    pam_decode_frame,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGBA32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1}, 
+};

libavformat/avformat.h

@@ -5,7 +5,7 @@
 extern "C" {
 #endif
 
-#define LIBAVFORMAT_BUILD       4620
+#define LIBAVFORMAT_BUILD       4621
 
 #define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
 #define LIBAVFORMAT_VERSION     FFMPEG_VERSION
@@ -115,6 +115,8 @@ typedef struct AVFormatParameters {
                                   mpeg2ts_raw is TRUE */
     int initial_pause:1;       /* do not begin to play the stream
                                   immediately (RTSP only) */
+    enum CodecID video_codec_id;
+    enum CodecID audio_codec_id;
 } AVFormatParameters;
 
 #define AVFMT_NOFILE        0x0001 /* no file should be opened */
@@ -358,6 +360,7 @@ typedef struct AVImageFormat {
 void av_register_image_format(AVImageFormat *img_fmt);
 AVImageFormat *av_probe_image_format(AVProbeData *pd);
 AVImageFormat *guess_image_format(const char *filename);
+enum CodecID av_guess_image2_codec(const char *filename);
 int av_read_image(ByteIOContext *pb, const char *filename,
                   AVImageFormat *fmt,
                   int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
@@ -521,6 +524,8 @@ AVOutputFormat *guess_stream_format(const char *short_name,
                                     const char *filename, const char *mime_type);
 AVOutputFormat *guess_format(const char *short_name, 
                              const char *filename, const char *mime_type);
+enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, 
+                            const char *filename, const char *mime_type, enum CodecType type);
 
 void av_hex_dump(FILE *f, uint8_t *buf, int size);
 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);

libavformat/img2.c

@@ -38,6 +38,11 @@ static const IdStrMap img_tags[] = {
     { CODEC_ID_MJPEG     , "jpg"},
     { CODEC_ID_LJPEG     , "ljpg"},
     { CODEC_ID_PNG       , "png"},
+    { CODEC_ID_PPM       , "ppm"},
+    { CODEC_ID_PGM       , "pgm"},
+    { CODEC_ID_PGMYUV    , "pgmyuv"},
+    { CODEC_ID_PBM       , "pbm"},
+    { CODEC_ID_PAM       , "pam"},
     { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
     { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
     { CODEC_ID_MPEG4     , "mpg4-img"},
@@ -133,6 +138,10 @@ static int image_probe(AVProbeData *p)
         return 0;
 }
 
+enum CodecID av_guess_image2_codec(const char *filename){
+    return av_str2id(img_tags, filename);
+}
+
 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 {
     VideoData *s = s1->priv_data;
@@ -180,8 +189,16 @@ static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
                         st->codec.frame_rate_base) / st->codec.frame_rate;
     }
     
-    st->codec.codec_type = CODEC_TYPE_VIDEO;
-    st->codec.codec_id = av_str2id(img_tags, s->path);
+    if(ap->video_codec_id){
+        st->codec.codec_type = CODEC_TYPE_VIDEO;
+        st->codec.codec_id = ap->video_codec_id;
+    }else if(ap->audio_codec_id){
+        st->codec.codec_type = CODEC_TYPE_AUDIO;
+        st->codec.codec_id = ap->audio_codec_id;
+    }else{
+        st->codec.codec_type = CODEC_TYPE_VIDEO;
+        st->codec.codec_id = av_str2id(img_tags, s->path);
+    }
 
     return 0;
  

libavformat/utils.c

@@ -77,6 +77,11 @@ AVOutputFormat *guess_format(const char *short_name, const char *filename,
     int score_max, score;
 
     /* specific test for image sequences */
+    if (!short_name && filename && 
+        filename_number_test(filename) >= 0 &&
+        av_guess_image2_codec(filename) != CODEC_ID_NONE) {
+        return guess_format("image2", NULL, NULL);
+    }
     if (!short_name && filename && 
         filename_number_test(filename) >= 0 &&
         guess_image_format(filename)) {
@@ -125,6 +130,26 @@ AVOutputFormat *guess_stream_format(const char *short_name, const char *filename
     return fmt;
 }
 
+/**
+ * guesses the codec id based upon muxer and filename.
+ */
+enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, 
+                            const char *filename, const char *mime_type, enum CodecType type){
+    if(type == CODEC_TYPE_VIDEO){
+        enum CodecID codec_id= CODEC_ID_NONE;
+
+        if(!strcmp(fmt->name, "image2")){
+            codec_id= av_guess_image2_codec(filename);
+        }
+        if(codec_id == CODEC_ID_NONE)
+            codec_id= fmt->video_codec;
+        return codec_id;
+    }else if(type == CODEC_TYPE_AUDIO)
+        return fmt->audio_codec;
+    else
+        return CODEC_ID_NONE;
+}
+
 AVInputFormat *av_find_input_format(const char *short_name)
 {
     AVInputFormat *fmt;
@@ -1740,6 +1765,11 @@ int av_find_stream_info(AVFormatContext *ic)
              st->codec.codec_id == CODEC_ID_VORBIS ||
              st->codec.codec_id == CODEC_ID_MJPEG ||
              st->codec.codec_id == CODEC_ID_PNG ||
+             st->codec.codec_id == CODEC_ID_PAM ||
+             st->codec.codec_id == CODEC_ID_PGM ||
+             st->codec.codec_id == CODEC_ID_PGMYUV ||
+             st->codec.codec_id == CODEC_ID_PBM ||
+             st->codec.codec_id == CODEC_ID_PPM ||
              (st->codec.codec_id == CODEC_ID_MPEG4 && !st->need_parsing)))
             try_decode_frame(st, pkt->data, pkt->size);