matroska: Add support for muxing/demuxing ffv1

Previously only demuxing when stored via the RIFF/AVI mapping was
supported.

See https://github.com/FFmpeg/FFV1/blob/master/ffv1.md#matroska-file-format

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/923

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1080>

4 files changed, 23 insertions, 2 deletions

diff --git a/docs/gst_plugins_cache.json b/docs/gst_plugins_cache.json
index 5378bafd6..96b6ca3ce 100644
--- a/docs/gst_plugins_cache.json
+++ b/docs/gst_plugins_cache.json
@@ -9114,7 +9114,7 @@
                         "presence": "request"
                     },
                     "video_%%u": {
-                        "caps": "video/mpeg:\n    mpegversion: { (int)1, (int)2, (int)4 }\n   systemstream: false\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-h264:\n  stream-format: { (string)avc, (string)avc3 }\n      alignment: au\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-h265:\n  stream-format: { (string)hvc1, (string)hev1 }\n      alignment: au\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-divx:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-huffyuv:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-dv:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-h263:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-msmpeg:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nimage/jpeg:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-theora:\nvideo/x-dirac:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-pn-realvideo:\n      rmversion: [ 1, 4 ]\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-vp8:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-vp9:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-raw:\n         format: { YUY2, I420, YV12, UYVY, AYUV, GRAY8, BGR, RGB }\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-prores:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-wmv:\n     wmvversion: [ 1, 3 ]\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-av1:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\n",
+                        "caps": "video/mpeg:\n    mpegversion: { (int)1, (int)2, (int)4 }\n   systemstream: false\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-h264:\n  stream-format: { (string)avc, (string)avc3 }\n      alignment: au\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-h265:\n  stream-format: { (string)hvc1, (string)hev1 }\n      alignment: au\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-divx:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-huffyuv:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-dv:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-h263:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-msmpeg:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nimage/jpeg:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-theora:\nvideo/x-dirac:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-pn-realvideo:\n      rmversion: [ 1, 4 ]\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-vp8:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-vp9:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-raw:\n         format: { YUY2, I420, YV12, UYVY, AYUV, GRAY8, BGR, RGB }\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-prores:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-wmv:\n     wmvversion: [ 1, 3 ]\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-av1:\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\nvideo/x-ffv:\n      ffversion: 1\n          width: [ 1, 2147483647 ]\n         height: [ 1, 2147483647 ]\n",
                         "direction": "sink",
                         "presence": "request"
                     }
diff --git a/gst/matroska/matroska-demux.c b/gst/matroska/matroska-demux.c
index 75319bc95..1eb429f93 100644
--- a/gst/matroska/matroska-demux.c
+++ b/gst/matroska/matroska-demux.c
@@ -6623,6 +6623,19 @@ gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext *
       GST_WARNING ("No AV1 codec data found!");
     }
     *codec_name = g_strdup_printf ("AOM AV1");
+  } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_FFV1)) {
+    caps =
+        gst_caps_new_simple ("video/x-ffv", "ffvversion", G_TYPE_INT, 1, NULL);
+    if (data) {
+      GstBuffer *priv;
+
+      priv = gst_buffer_new_memdup (data, size);
+      gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, priv, NULL);
+      gst_buffer_unref (priv);
+    } else {
+      GST_WARNING ("No FFV1 codec data found!");
+    }
+    *codec_name = g_strdup_printf ("FFMpeg v1");
   } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_PRORES)) {
     guint32 fourcc;
     const gchar *variant, *variant_descr = "";
diff --git a/gst/matroska/matroska-ids.h b/gst/matroska/matroska-ids.h
index ba44f104b..c4fc73caa 100644
--- a/gst/matroska/matroska-ids.h
+++ b/gst/matroska/matroska-ids.h
@@ -380,6 +380,7 @@
 #define GST_MATROSKA_CODEC_ID_VIDEO_AV1          "V_AV1"
 #define GST_MATROSKA_CODEC_ID_VIDEO_MPEGH_HEVC   "V_MPEGH/ISO/HEVC"
 #define GST_MATROSKA_CODEC_ID_VIDEO_PRORES       "V_PRORES"
+#define GST_MATROSKA_CODEC_ID_VIDEO_FFV1         "V_FFV1"
 
 #define GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L1       "A_MPEG/L1"
 #define GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L2       "A_MPEG/L2"
diff --git a/gst/matroska/matroska-mux.c b/gst/matroska/matroska-mux.c
index 28970a6f1..c7a5adfd6 100644
--- a/gst/matroska/matroska-mux.c
+++ b/gst/matroska/matroska-mux.c
@@ -146,7 +146,8 @@ static GstStaticPadTemplate videosink_templ =
         "video/x-prores, "
         COMMON_VIDEO_CAPS "; "
         "video/x-wmv, " "wmvversion = (int) [ 1, 3 ], " COMMON_VIDEO_CAPS "; "
-        "video/x-av1, " COMMON_VIDEO_CAPS)
+        "video/x-av1, " COMMON_VIDEO_CAPS ";"
+        "video/x-ffv, ffversion = (int) 1, " COMMON_VIDEO_CAPS)
     );
 
 #define COMMON_AUDIO_CAPS \
@@ -1344,6 +1345,12 @@ skip_details:
     if (codec_buf != NULL)
       gst_buffer_extract_dup (codec_buf, 0, gst_buffer_get_size (codec_buf),
           &context->codec_priv, &context->codec_priv_size);
+  } else if (!strcmp (mimetype, "video/x-ffv")) {
+    gst_matroska_mux_set_codec_id (context, GST_MATROSKA_CODEC_ID_VIDEO_FFV1);
+    gst_matroska_mux_free_codec_priv (context);
+    if (codec_buf != NULL)
+      gst_buffer_extract_dup (codec_buf, 0, gst_buffer_get_size (codec_buf),
+          &context->codec_priv, &context->codec_priv_size);
   } else if (!strcmp (mimetype, "video/mpeg")) {
     gint mpegversion;